lab6: finish the task, fix a few bugs and add the LICENSE file

.gitignore

@@ -0,0 +1 @@
+*.class

labs/2/Main.java

@@ -26,7 +26,7 @@ public class Main {
                 }
                 else if (Objects.equals(args[p], "--offline")) {
                     allow_networking = false;
-                    p += 2;
+                    p += 1;
                 }
                 else {
                     matrix_file_name = args[p++];
@@ -67,6 +67,7 @@ public class Main {
         System.out.println("Original matrix:");
         Matrix m = new Matrix();
         m.init(raw_m);
+        m.print();
         
         // transposing
         m.transpose();
@@ -89,6 +90,7 @@ public class Main {
             }
         } catch (Exception e) {
             System.out.println("[ERROR] Failed to fetch resource " + output_filename + "from " + remote_url + " due to the following exception: " + e);
+            System.exit(1);
         }
     }
 
@@ -99,8 +101,8 @@ public class Main {
             if (!help_file.exists()) {
                 System.err.println("[WARN] Help file is missing.");
                 if (allow_net) {
-                    System.err.println("[INFO] Trying to recover it from the git server");
-                    fetchResource("http://lab2.kpi.dev:3000/dymik739/oop-labs-collection/raw/branch/lab2-dev/labs/2/src/help.txt", "src/help.txt");
+                    System.err.println("[INFO] Trying to recover it from the CDN server");
+                    fetchResource("http://lab2.kpi.dev:16554/help.txt", "src/help.txt");
                 } else {
                     System.err.println("[INFO] Networking is disabled, not recovering");
                     System.exit(1);

labs/2/Matrix.java

@@ -19,7 +19,6 @@ public class Matrix {
     }
 
     public void transpose() {
-        print();
         if (this.m[0].length != this.m.length) {
             int new_h = this.m[0].length;
             int new_w = this.m.length;

labs/3/Benchmarker.java

@@ -0,0 +1,13 @@
+import lab3lib.Finder;
+
+public class Benchmarker {
+    public static void main(String[] args) {
+        System.out.print("Timing object creation...");
+        long startTime = System.nanoTime();
+        Finder obj = new Finder();
+        long endTime = System.nanoTime();
+
+        System.out.println(" Finished!");
+        System.out.println("Operation took " + (endTime - startTime) + "ns");
+    }
+}

labs/3/Finder.java

@@ -0,0 +1,146 @@
+import java.util.HashSet;
+import java.util.Set;
+import java.util.regex.Pattern;
+import lab3lib.Fetcher;
+
+public class Finder {
+    public static void main(String[] args) {
+        boolean demoContent = false;
+        
+        StringBuilder inputStringBuilder = new StringBuilder();
+        if (demoContent) {
+            inputStringBuilder = new StringBuilder("Testing, text to make up words. Testing, text without specific, up words. Therefore, we don't care about arteriscs and other useless symbols, as the only reason to use it is when the code runs horrible.");
+        } else {
+            inputStringBuilder = receiveText();
+        }
+
+        System.out.println("Processing string: " + inputStringBuilder);
+
+        final StringBuilder[] sentences = splitStringBuilder(inputStringBuilder, "[.?!] ?");
+        Set<StringBuilder> firstSentenceWords = new HashSet<StringBuilder>();
+
+        for (StringBuilder word : splitStringBuilder(sentences[0], ",? ")) {
+            firstSentenceWords.add(word);
+        }
+
+        final long startTime = System.nanoTime();
+
+        for (StringBuilder sentence : subarrayStringBuilder(sentences, 1, sentences.length)) {
+            StringBuilder[] words = splitStringBuilder(sentence, ",? ");
+
+            for (StringBuilder word1 : words) {
+                System.out.print("Searching for '" + toLowerCaseStringBuilder(word1) + "' in " + firstSentenceWords.toString() + "...");
+
+                Set<StringBuilder> tempWords = new HashSet<>(firstSentenceWords);
+                
+                boolean wordFound = false;
+                for (StringBuilder word2 : firstSentenceWords) {
+                    if (compareStringBuilders(toLowerCaseStringBuilder(word1), toLowerCaseStringBuilder(word2))) {
+                        wordFound = true;
+                        tempWords.remove(word2);
+                        break;
+                    }
+                }
+                
+                if (wordFound) {
+                    System.out.println(" found!");
+                    firstSentenceWords = tempWords;
+                } else {
+                    System.out.println(" absent.");
+                }
+            }
+        }
+
+        final long endTime = System.nanoTime();
+
+        System.out.println(getFinalMessage(firstSentenceWords));
+        System.out.println("Stats: search execution took " + (endTime - startTime) + "ns");
+    }
+
+    private static StringBuilder receiveText() {
+        try {
+            return Fetcher.fetchTextFromPython();
+        } catch (Exception e) {
+            return new StringBuilder("Testing, text to make up words. Testing, text without specific, up words. Therefore, we don't care about arteriscs and other useless symbols, as the only reason to use it is when the code runs horrible.");
+        }
+    }
+
+    private static StringBuilder toLowerCaseStringBuilder(StringBuilder inputStringBuilder) {
+        return new StringBuilder(new String(inputStringBuilder).toLowerCase());
+    }
+
+    private static StringBuilder getFinalMessage(Set<StringBuilder> s) {
+        if (s.size() == 1) {
+            return new StringBuilder("Found the word '" + s.iterator().next() + "'");
+        } else if (s.size() > 1) {
+            return new StringBuilder("Found more than one word (" + s.toString() + "), can't pick one.");
+        } else {
+            return new StringBuilder("No such word has been found!");
+        }
+    }
+
+    private static boolean compareStringBuilders(StringBuilder a, StringBuilder b)
+    {
+        if (a.length() == b.length())
+        {
+            for (int i = 0; i < a.length(); i++)
+            {
+                if (a.charAt(i) != b.charAt(i))
+                {
+                    return false;
+                }
+            }
+            return true;
+        } 
+        else
+        {
+            return false;
+        }
+    }
+
+    // apparently, this is incredibly complicated in Java
+    private static String[] subarray(String[] array, int start, int end) {
+        String[] result = new String[end - start];
+
+        for (int i = start, j = 0; i < end; i++, j++) {
+            result[j] = array[i];
+        }
+
+        return result;
+    }
+    
+    // little wrapper to simplify StringBuilder usage task
+    private static StringBuilder[] subarrayStringBuilder(StringBuilder[] array, int start, int end) {
+        String[] tempArray = subarray(stringBuilderArrayToStringArray(array), start, end);
+        return stringArrayToStringBuilderArray(tempArray);
+    }
+    
+    // name describes it well enough
+    private static StringBuilder[] stringArrayToStringBuilderArray(String[] inputArray) {
+        StringBuilder[] outputArray = new StringBuilder[inputArray.length];
+
+        for (int i = 0; i < inputArray.length; i++) {
+            outputArray[i] = new StringBuilder(inputArray[i]);
+        }
+
+        return outputArray;
+    }
+
+    // reverse of the above
+    private static String[] stringBuilderArrayToStringArray(StringBuilder[] inputArray) {
+        String[] outputArray = new String[inputArray.length];
+
+        for (int i = 0; i < inputArray.length; i++) {
+            outputArray[i] = new String(inputArray[i]);
+        }
+
+        return outputArray;
+    }
+    
+    // same as String split method but using StringBuilder
+    private static StringBuilder[] splitStringBuilder(StringBuilder input, String regexp) {
+        String[] tempStrings = Pattern.compile(regexp).split(input);
+        return stringArrayToStringBuilderArray(tempStrings);
+    }
+
+}

labs/3/build.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+javac -d "renderSuite-classes" renderSuite/*

labs/3/lab3lib/Fetcher.java

@@ -0,0 +1,49 @@
+package lab3lib;
+
+//import java.net.URL;
+//import java.io.BufferedInputStream;
+import java.util.Scanner;
+import java.lang.Exception;
+//import javax.json.JsonObject;
+
+public class Fetcher {
+    public void main() {}
+    
+    /*
+    private static String fetchString(String remote_url) {
+        try {
+            Scanner reader = new Scanner(new URL(remote_url).openStream(), "UTF-8");
+            String jsonString = "";
+            
+            if (reader.hasNextLine()) {
+                jsonString = reader.nextLine();
+            }
+
+            return jsonString;
+        } catch (Exception e) {
+            System.out.println("[ERROR] Failed to fetch resource from " + remote_url + " due to the following exception: " + e);
+            System.exit(1);
+        }
+    }
+    */
+
+    public static StringBuilder fetchTextFromPython() {
+        try {
+            Process contentFetcher = Runtime.getRuntime().exec("python3 lab3lib/fetchContent.py");
+            Scanner reader = new Scanner(contentFetcher.getInputStream());
+            return new StringBuilder(reader.nextLine());
+        } catch (Exception e) {
+            return new StringBuilder("");
+        }
+    }
+
+    /*
+    public StringBuilder fetchText(String request) {
+        String responce = fetchString("http://10.1.1.2:8080/search?language=en-US&format=json&q=" + request);
+        JSONObject results = new JSONObject(responce);
+        return results.get("results").get(0).get("content");
+    }
+    */
+}
+
+//JSONObject results = 'http://10.1.1.2:8080/search?q=test&language=en-US&format=json'

labs/3/lab3lib/fetchContent.py

@@ -0,0 +1,10 @@
+import requests
+from random import randint
+import json
+
+r = requests.get("http://10.1.1.2:8080/search?q=test&format=json&language=en-US")
+
+results = json.loads(r.text)["results"]
+final_content = results[randint(0, len(results))]['content']
+
+print(final_content)

labs/3/renderSuite/Camera.java

@@ -0,0 +1,66 @@
+package renderSuite;
+
+import renderSuite.Vec3;
+import renderSuite.Ray;
+
+import java.awt.image.BufferedImage;
+import javax.imageio.ImageIO;
+
+import java.io.File;
+
+public class Camera {
+    private Vec3 p, f;
+    private double fov;
+    private int sizeX, sizeY;
+
+    public Camera(Vec3 position, Vec3 facing, double fov, int sizeX, int sizeY) {
+        this.p = position;
+        this.f = facing;
+        this.fov = fov;
+        this.sizeX = sizeX;
+        this.sizeY = sizeY;
+    }
+
+    public void main() {
+
+    }
+
+    public void renderImageTo(String filename, Surface[] surfs) {
+        BufferedImage bi = new BufferedImage(this.sizeX, this.sizeY, BufferedImage.TYPE_INT_RGB);
+
+        for (int x = 0; x < this.sizeX; x++) {
+            for (int y = 0; y < this.sizeY; y++) {
+                Vec3 result = probe(x, y);
+                int color = ( (int)result.x ) << 16 | ( (int)result.y ) << 8 | ( (int)result.z );
+                bi.setRGB(x, y, color);
+            }
+        }
+
+        File f = new File(filename + ".png");
+        ImageIO.write(bi, "PNG", f);
+    }
+
+    public Vec3 probe(int x, int y) {
+        Vec3 result = new Vec3(0, 0, 0);
+        
+        // creating ray to use as a probing object
+        Ray ray = new Ray(this.p.copy(), this.f.copy().get_norm());
+
+        // adjust ray facing
+        double offsetX = ((x/this.sizeX) - 0.5) * 2;
+        ray.rotate('y', offsetX * this.fov);
+
+        double offsetY = ((y/this.sizeY) - 0.5) * 2;
+        ray.rotate('x', offsetY * this.fov);
+
+        // check collisions with every object on scene
+        for (int i = 0; i < surfs.length; i++) {
+            if (surfs[i].intersect(ray)) {
+                return surfs[i].color;
+            }
+        }
+        
+        // if no collision detected, return black pixel
+        return new Vec3(0, 0, 0);
+    }
+}

labs/3/renderSuite/Letter.java

@@ -0,0 +1,7 @@
+import 
+public class Letter {
+     this.
+    public void main() {
+        
+    }
+}

labs/3/renderSuite/Ray.java

@@ -0,0 +1,40 @@
+package renderSuite;
+
+import java.lang.Math;
+import renderSuite.Vec3;
+
+public class Ray {
+    // position, facing
+    Vec3 p, f;
+
+    public Ray(Vec3 position, Vec3 facing) {
+        this.p = position;
+        this.f = facing;
+    }
+
+    public void main() {}
+
+    public void rotate(char axis, double angle) {
+        if (axis == 'x') {
+            this.f = new Vec3(this.f.x,
+                              this.f.y*Math.cos(angle) - this.f.z*Math.sin(angle),
+                              this.f.y*Math.sin(angle) + this.f.z*Math.cos(angle));
+        } else if (axis == 'y') {
+            this.f = new Vec3(this.f.x*Math.cos(angle) + this.f.z*Math.sin(angle),
+                              this.f.y,
+                              this.f.z*Math.cos(angle) - this.f.x*Math.sin(angle));
+        }
+    }
+
+    public void move(Vec3 mv) {
+        this.p.x += mv.x;
+        this.p.y += mv.y;
+        this.p.z += mv.z;
+    }
+    
+    public void step(double l) {
+        this.p.x += this.f.x * l;
+        this.p.y += this.f.y * l;
+        this.p.z += this.f.z * l;
+    }
+}

labs/3/renderSuite/Sphere.java

@@ -0,0 +1,43 @@
+package renderSuite;
+
+import renderSuite.Vec3;
+import renderSuite.Util;
+import renderSuite.Ray;
+
+public class Sphere extends Surface {
+    double r;
+
+    public Sphere(Vec3 position, Vec3 color, double radius) {
+        this.p = position;
+        this.c = color;
+        this.r = radius;
+    }
+
+    public void main() {
+
+    }
+
+    public boolean intersect(Ray r) {
+        // OLD
+        //double dist = Util.d(ray_position, position);
+        //return (Util.d(ray_position, position) <= radius);
+
+        // using RTX
+        Vec3 l = new Vec3(this.p.x - r.p.x,
+                          this.p.y - r.p.y,
+                          this.p.z - r.p.z);
+
+        Vec3 nl = l.get_norm();
+        double cosine = Util.dot(r.f, nl);
+        
+        // >90 degrees = no intersection
+        if (cosine < 0) {
+            return false;
+        }
+
+        double tc = l.len() * cosine;
+        double d = Math.sqrt( l.len()*l.len() - tc*tc );
+        
+        return (d < this.r);
+    }
+}

labs/3/renderSuite/Surface.java

@@ -0,0 +1,39 @@
+package renderSuite;
+
+import renderSuite.Vec3;
+//import renderSuite.Util;
+//import renderSuite.Ray;
+
+public class Surface {
+    Vec3 p, c;
+
+    public void main() {
+
+    }
+
+    /*
+    public boolean intersect(Ray r) {
+        // OLD
+        //double dist = Util.d(ray_position, position);
+        //return (Util.d(ray_position, position) <= radius);
+
+        // using RTX
+        Vec3 l = new Vec3(this.p.x - r.p.x,
+                          this.p.y - r.p.y,
+                          this.p.z - r.p.z);
+
+        Vec3 nl = l.get_norm();
+        double cosine = Util.dot(r.f, nl);
+        
+        // >90 degrees = no intersection
+        if (cosine < 0) {
+            return false;
+        }
+
+        double tc = l.len() * cosine;
+        double d = Math.sqrt( l.len()*l.len() - tc*tc );
+        
+        return (d < this.r);
+    }
+    */
+}

labs/3/renderSuite/Util.java

@@ -0,0 +1,17 @@
+package renderSuite;
+
+import java.lang.Math;
+import renderSuite.Vec3;
+
+public class Util {
+    // measure distance between two points
+    public static double d(Vec3 p1, Vec3 p2) {
+        return Math.sqrt((p1.x - p2.x) * (p1.x - p2.x)
+                       + (p1.y - p2.y) * (p1.y - p2.y)
+                       + (p1.z - p2.z) * (p1.z - p2.z));
+    }
+
+    public static double dot(Vec3 v1, Vec3 v2) {
+        return Math.sqrt(v1.x*v2.x + v1.y*v2.y + v1.z*v2.z);
+    }
+}

labs/3/renderSuite/Vec3.java

@@ -0,0 +1,40 @@
+package renderSuite;
+
+import java.lang.Math;
+
+public class Vec3 {
+    public double x, y, z;
+
+    public Vec3(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public void main(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public double len() {
+        return Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z);
+    }
+
+    public void normalize() {
+        double l = len();
+
+        this.x /= l;
+        this.y /= l;
+        this.z /= l;
+    }
+
+    public Vec3 get_norm() {
+        double l = len();
+        return new Vec3(this.x / l, this.y / l, this.z / l);
+    }
+
+    public Vec3 copy() {
+        return new Vec3(this.x, this.y, this.z);
+    }
+}

labs/4/Group.java

@@ -0,0 +1,100 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.util.Arrays;
+
+/**
+ * Group class defines a representation of a university group with students
+ * that can be used as a convenient structure to look at students' statistics.
+ *
+ * @version 0.1 20 May 2023
+ * @author Dymik739
+ */
+public class Group {
+    /**
+     * Main method which should be executed at the start of this application.
+     *
+     * @since 0.1
+     */
+    public static void main() {
+        Student[] studentList = {
+            // name, results, motivation%, ability%, course№
+            new Student("Davie", 16.3, 93.5, 98.9, 5),
+            new Student("Terry", 99.4, 49.3, 73.2, 7),
+            new Student("Mark", 67.9, 15.5, 7.8, 4),
+            new Student("Rand", 85.5, 82.6, 99.9, 12),
+            new Student("Steve", 1.2, 99.8, 99.2, 1)
+        };
+
+        System.out.println("Original students array:");
+        printStudents(studentList);
+
+        Arrays.sort(studentList, (o1, o2) -> o1.getName().compareTo(o2.getName()));
+
+        System.out.println("\nArray, sorted by students' name:");
+        printStudents(studentList);
+
+        Arrays.sort(studentList, (o1, o2) ->
+                    compareDouble(o2.getResults(), o1.getResults()));
+
+        System.out.println("\nArray, sorted by the reverse of students' " +
+                           "score results:");
+        printStudents(studentList);
+
+        System.out.println("\nAs we can clearly see, " +
+                           studentList[studentList.length-1].getName() + " with " +
+                           studentList[studentList.length-1].getMotivationPercent() + 
+                           "% of motivation and " +
+                           studentList[studentList.length-1].getLearningAbilitiesPercent() +
+                           "% ability to learn will be the one who is kicked " +
+                           "from this university, because such is our life.");
+    }
+    
+    /**
+     * Outputs to stdout a given array of students in a fancy way.
+     *
+     * @param array array to print out
+     */
+    private static void printStudents(Student[] array) {
+        for (Student s : array) {
+            System.out.println(s);
+        }
+    }
+
+    /**
+     * Compares numbers of type Double
+     *
+     * @param i1 first number to compare
+     * @param i2 second number to compare
+     * @return if the first argument is greater, 1 is returned
+     *         if the second argument is greater, -1 is returned
+     *         if the arguments are equal, 0 is returned
+     */
+    private static int compareDouble(double i1, double i2) {
+        if (i1 > i2) {
+            return 1;
+        } else if (i1 < i2) {
+            return -1;
+        } else {
+            return 0;
+        }
+    }
+
+}

labs/4/LICENSE

@@ -0,0 +1,232 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+Preamble
+
+The GNU General Public License is a free, copyleft license for software and other kinds of works.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions.
+
+Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the freedom of users.
+
+Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+TERMS AND CONDITIONS
+
+0. Definitions.
+
+“This License” refers to version 3 of the GNU General Public License.
+
+“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+
+“The Program” refers to any copyrightable work licensed under this License. Each licensee is addressed as “you”. “Licensees” and “recipients” may be individuals or organizations.
+
+To “modify” a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy. The resulting work is called a “modified version” of the earlier work or a work “based on” the earlier work.
+
+A “covered work” means either the unmodified Program or a work based on the Program.
+
+To “propagate” a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well.
+
+To “convey” a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays “Appropriate Legal Notices” to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion.
+
+1. Source Code.
+The “source code” for a work means the preferred form of the work for making modifications to it. “Object code” means any non-source form of a work.
+
+A “Standard Interface” means an interface that either is an official standard defined by a recognized standards body, or, in the case of interfaces specified for a particular programming language, one that is widely used among developers working in that language.
+
+The “System Libraries” of an executable work include anything, other than the work as a whole, that (a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in source code form. A “Major Component”, in this context, means a major essential component (kernel, window system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce the work, or an object code interpreter used to run it.
+
+The “Corresponding Source” for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities. However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work. For example, Corresponding Source includes interface definition files associated with source files for the work, and the source code for shared libraries and dynamically linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow between those subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same work.
+
+2. Basic Permissions.
+All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force. You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright. Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary.
+
+3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+
+When you convey a covered work, you waive any legal power to forbid circumvention of technological measures to the extent such circumvention is effected by exercising rights under this License with respect to the covered work, and you disclaim any intention to limit operation or modification of the work as a means of enforcing, against the work's users, your or third parties' legal rights to forbid circumvention of technological measures.
+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee.
+
+5. Conveying Modified Source Versions.
+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
+     a) The work must carry prominent notices stating that you modified it, and giving a relevant date.
+
+     b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7. This requirement modifies the requirement in section 4 to “keep intact all notices”.
+
+     c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged. This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it.
+
+     d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so.
+
+A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or distribution medium, is called an “aggregate” if the compilation and its resulting copyright are not used to limit the access or legal rights of the compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate does not cause this License to apply to the other parts of the aggregate.
+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
+     a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange.
+
+     b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge.
+
+     c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b.
+
+     d) Convey the object code by offering access from a designated place (gratis or for a charge), and offer equivalent access to the Corresponding Source in the same way through the same place at no further charge. You need not require recipients to copy the Corresponding Source along with the object code. If the place to copy the object code is a network server, the Corresponding Source may be on a different server (operated by you or a third party) that supports equivalent copying facilities, provided you maintain clear directions next to the object code saying where to find the Corresponding Source. Regardless of what server hosts the Corresponding Source, you remain obligated to ensure that it is available for as long as needed to satisfy these requirements.
+
+     e) Convey the object code using peer-to-peer transmission, provided you inform other peers where the object code and Corresponding Source of the work are being offered to the general public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded from the Corresponding Source as a System Library, need not be included in conveying the object code work.
+
+A “User Product” is either (1) a “consumer product”, which means any tangible personal property which is normally used for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling. In determining whether a product is a consumer product, doubtful cases shall be resolved in favor of coverage. For a particular product received by a particular user, “normally used” refers to a typical or common use of that class of product, regardless of the status of the particular user or of the way in which the particular user actually uses, or expects or is expected to use, the product. A product is a consumer product regardless of whether the product has substantial commercial, industrial or non-consumer uses, unless such uses represent the only significant mode of use of the product.
+
+“Installation Information” for a User Product means any methods, procedures, authorization keys, or other information required to install and execute modified versions of a covered work in that User Product from a modified version of its Corresponding Source. The information must suffice to ensure that the continued functioning of the modified object code is in no case prevented or interfered with solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed under this section must be accompanied by the Installation Information. But this requirement does not apply if neither you nor any third party retains the ability to install modified object code on the User Product (for example, the work has been installed in ROM).
+
+The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed. Access to a network may be denied when the modification itself materially and adversely affects the operation of the network or violates the rules and protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format that is publicly documented (and with an implementation available to the public in source code form), and must require no special password or key for unpacking, reading or copying.
+
+7. Additional Terms.
+“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
+
+     a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
+
+     b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or
+
+     c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or
+
+     d) Limiting the use for publicity purposes of names of licensors or authors of the material; or
+
+     e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or
+
+     f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors.
+
+All other non-permissive additional terms are considered “further restrictions” within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way.
+
+8. Termination.
+You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
+
+Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10.
+
+9. Acceptance Not Required for Having Copies.
+You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License.
+
+An “entity transaction” is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it.
+
+11. Patents.
+A “contributor” is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's “contributor version”.
+
+A contributor's “essential patent claims” are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, “control” includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the contributor's essential patent claims, to make, use, sell, offer for sale, import and otherwise run, modify and propagate the contents of its contributor version.
+
+In the following three paragraphs, a “patent license” is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement). To “grant” such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. “Knowingly relying” means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it.
+
+A patent license is “discriminatory” if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Use with the GNU Affero General Public License.
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such.
+
+14. Revised Versions of this License.
+The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License “or any later version” applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+
+     <program>  Copyright (C) <year>  <name of author>
+     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.

labs/4/Makefile

@@ -0,0 +1,10 @@
+compile:
+	javac Group.java
+	javac Student.java
+
+clean:
+	rm Group.class
+	rm Student.class
+
+doc:
+	javadoc -d doc/ *.java

labs/4/Student.java

@@ -0,0 +1,131 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * represents a student with generic terms and phrases to let programmers
+ * write more readable code.
+ *
+ * @author Dymik739
+ * @version 0.1
+ * @since 0.1
+ */
+public class Student {
+    /**
+     * name of the student
+     */
+    private String name;
+
+    /**
+     * overall ranking the student gets after finishing all courses
+     */
+    private double results;
+
+    /**
+     * a reasonable variable showing student motivation. The higher this
+     * number is, the better this student studies.
+     */
+    private double motivationPercent;
+
+    /**
+     * general ability to learn which directly affects learning speed.
+     */
+    private double learningAbilities;
+
+    /**
+     * shows the amount of subjects this student is studying.
+     */
+    private int chosenCoursesAmount;
+    
+    /**
+     * This constructor lets you create the Student class right away
+     *
+     * @param name the name of this student
+     * @param results starting point for the overall ranking score of this
+     *                student
+     * @param motivationPercent this student motivation level. Higher values
+     *                          allow for more jobs taken consecutively.
+     * @param learningAbilities directly affect learning speed of this student
+     * @param chosenCoursesAmount amount of courses chosen by this student.
+     *                            Roughly shows the load being put on them
+     * @since 0.1
+     */
+    public Student(String name, double results, double motivationPercent,
+                   double learningAbilities, int chosenCoursesAmount) {
+        this.name = name;
+        this.results = results;
+        this.motivationPercent = motivationPercent;
+        this.learningAbilities = learningAbilities;
+        this.chosenCoursesAmount = chosenCoursesAmount;
+    }
+    
+    /**
+     * This method allows you to print out the student object in a nice way.
+     *
+     * @since 0.1
+     */
+    @Override
+    public String toString() {
+        return "Student(name = '" + this.name + "', results = " + this.results +
+               ", motivationPercent = " + this.motivationPercent +
+               ", learningAbilities = " + this.learningAbilities +
+               ", chosenCoursesAmount = " + this.chosenCoursesAmount + ")";
+    }
+    
+    /**
+     * Getter for the private name field of this class
+     *
+     * @return String containing this student's name
+     * @since 0.1
+     */
+    public String getName() {
+        return this.name;
+    }
+    
+    /**
+     * Getter for the private results field of this class
+     *
+     * @return double representing final score of the student
+     * @since 0.1
+     */
+    public double getResults() {
+        return this.results;
+    }
+    
+    /**
+     * Getter for the private motivationPercent field of this class.
+     *
+     * @return double representing strenght of this student's motivation to
+     *         learn
+     * @since 0.1
+     */
+    public double getMotivationPercent() {
+        return this.motivationPercent;
+    }
+    
+    /**
+     * Getter for the private motivationPercent field of this class.
+     *
+     * @return double representing how quickly this student can learn
+     * @since 0.1
+     */
+    public double getLearningAbilitiesPercent() {
+        return this.learningAbilities;
+    }
+}

labs/4/generate-docs.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+javadoc -d doc/ *.java

labs/4/update-http-docs.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rsync -avuP --delete doc/ linode:/root/oop-server/labs/4/doc/

labs/5/LICENSE

@@ -0,0 +1,232 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+Preamble
+
+The GNU General Public License is a free, copyleft license for software and other kinds of works.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others.
+
+For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it.
+
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+
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+
+Finally, every program is threatened constantly by software patents. States should not allow patents to restrict development and use of software on general-purpose computers, but in those that do, we wish to avoid the special danger that patents applied to a free program could make it effectively proprietary. To prevent this, the GPL assures that patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+TERMS AND CONDITIONS
+
+0. Definitions.
+
+“This License” refers to version 3 of the GNU General Public License.
+
+“Copyright” also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+
+“The Program” refers to any copyrightable work licensed under this License. Each licensee is addressed as “you”. “Licensees” and “recipients” may be individuals or organizations.
+
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+
+A “covered work” means either the unmodified Program or a work based on the Program.
+
+To “propagate” a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy. Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well.
+
+To “convey” a work means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays “Appropriate Legal Notices” to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License. If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion.
+
+1. Source Code.
+The “source code” for a work means the preferred form of the work for making modifications to it. “Object code” means any non-source form of a work.
+
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+
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+
+The “Corresponding Source” for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities. However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work. For example, Corresponding Source includes interface definition files associated with source files for the work, and the source code for shared libraries and dynamically linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow between those subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same work.
+
+2. Basic Permissions.
+All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met. This License explicitly affirms your unlimited permission to run the unmodified Program. The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work. This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force. You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright. Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the conditions stated below. Sublicensing is not allowed; section 10 makes it unnecessary.
+
+3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+
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+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee.
+
+5. Conveying Modified Source Versions.
+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
+     a) The work must carry prominent notices stating that you modified it, and giving a relevant date.
+
+     b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7. This requirement modifies the requirement in section 4 to “keep intact all notices”.
+
+     c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged. This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it.
+
+     d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so.
+
+A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or distribution medium, is called an “aggregate” if the compilation and its resulting copyright are not used to limit the access or legal rights of the compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate does not cause this License to apply to the other parts of the aggregate.
+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
+     a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange.
+
+     b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge.
+
+     c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source. This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b.
+
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+
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+
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+
+A “User Product” is either (1) a “consumer product”, which means any tangible personal property which is normally used for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling. In determining whether a product is a consumer product, doubtful cases shall be resolved in favor of coverage. For a particular product received by a particular user, “normally used” refers to a typical or common use of that class of product, regardless of the status of the particular user or of the way in which the particular user actually uses, or expects or is expected to use, the product. A product is a consumer product regardless of whether the product has substantial commercial, industrial or non-consumer uses, unless such uses represent the only significant mode of use of the product.
+
+“Installation Information” for a User Product means any methods, procedures, authorization keys, or other information required to install and execute modified versions of a covered work in that User Product from a modified version of its Corresponding Source. The information must suffice to ensure that the continued functioning of the modified object code is in no case prevented or interfered with solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed under this section must be accompanied by the Installation Information. But this requirement does not apply if neither you nor any third party retains the ability to install modified object code on the User Product (for example, the work has been installed in ROM).
+
+The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed. Access to a network may be denied when the modification itself materially and adversely affects the operation of the network or violates the rules and protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format that is publicly documented (and with an implementation available to the public in source code form), and must require no special password or key for unpacking, reading or copying.
+
+7. Additional Terms.
+“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
+
+     a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
+
+     b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or
+
+     c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or
+
+     d) Limiting the use for publicity purposes of names of licensors or authors of the material; or
+
+     e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or
+
+     f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors.
+
+All other non-permissive additional terms are considered “further restrictions” within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
+
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+
+Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way.
+
+8. Termination.
+You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
+
+Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10.
+
+9. Acceptance Not Required for Having Copies.
+You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License.
+
+An “entity transaction” is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it.
+
+11. Patents.
+A “contributor” is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's “contributor version”.
+
+A contributor's “essential patent claims” are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, “control” includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
+
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+
+In the following three paragraphs, a “patent license” is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement). To “grant” such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. “Knowingly relying” means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it.
+
+A patent license is “discriminatory” if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Use with the GNU Affero General Public License.
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such.
+
+14. Revised Versions of this License.
+The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License “or any later version” applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+
+     <program>  Copyright (C) <year>  <name of author>
+     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.

labs/5/Main.java

@@ -0,0 +1,114 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import lab5lib.Fetcher;
+
+/**
+ * Main class of this application that defines the overall flow
+ * of the work
+ *
+ * @since 0.2
+ * @author Dymik739
+ */
+public class Main {
+    /**
+     * Main method to rule them all.
+     *
+     * @since 0.2
+     * @param args String[] of CLI arguments
+     */
+    public static void main(String[] args) {
+        boolean demoContent; // defines if the demo string is used
+        String inputString; // contains initial string
+        Text text; // contains the Text object used for processing later
+        String result; // contains responce string
+
+        demoContent = parseArgs(args);
+        inputString = getInput(demoContent);
+
+        System.out.println("Processing string: " + inputString);
+
+        text = new Text(inputString);
+        text.cleanFirstSentence();
+
+        System.out.println("Cleared text: " + text.toString());
+        result = text.getSentenceByIndex(0).getUniqueWord();
+
+        System.out.println(result);
+    }
+    
+    /**
+     * Method used to get input string. Automatically determines
+     * the source based on downstream state and demoContent variable.
+     *
+     * @since 0.2
+     * @param demoContent forces method to return premade string.
+     * @return String containing server responce or the premade string
+     *         (in case if requested or the fetching fails)
+     */
+    private static String getInput(boolean demoContent) {
+        if (demoContent) {
+            return "Testing, text to make up words. Testing, text without " +
+                   "specific, up words? Therefore, we don't care about " +
+                   "arteriscs and other useless symbols, as the only reason" +
+                   "to use it is when the code runs horrible. But this time" +
+                   "we sure do care about question and exclamation marks!";
+        } else {
+            return receiveText();
+        }
+    }
+
+    /**
+     * Method to parse CLI arguments.
+     *
+     * @since 0.2
+     * @param args CLI arguments to process
+     * @return boolean indicating if the demo content is requested
+     */
+    private static boolean parseArgs(String[] args) {
+        boolean demoContent = false;
+
+        for (String arg : args) {
+            if ("-d".equals(arg)) {
+                demoContent = true;
+            }
+        }
+
+        return demoContent;
+    }
+
+    /**
+     * More low-level method that proxies request downstream.
+     *
+     * @since 0.2
+     * @return String to upstream; see getInput() method
+     */
+    private static String receiveText() {
+        try {
+            return Fetcher.fetchTextFromPython();
+        } catch (Exception e) {
+            return "Testing, text to make up words. Testing, text without " +
+                   "specific, up words. Therefore, we don't care about " +
+                   "arteriscs and other useless symbols, as the only reason" +
+                   "to use it is when the code runs horrible. But this time" +
+                   "we sure do care about question and exclamation marks!";
+        }
+    }
+}

labs/5/Makefile

@@ -0,0 +1,15 @@
+all: build doc upload
+
+build:
+	javac *.java
+
+doc:
+	javadoc -d docs/ *.java
+
+upload:
+	rsync -av docs/ linode:/root/oop-server/labs/5/docs/
+
+clean:
+	rm *.class
+	rm lab5lib/*.class
+	rm -r docs/

labs/5/Sentence.java

@@ -0,0 +1,180 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+/**
+ * Class that represents a sentence containing words.
+ *
+ * @since 0.2
+ * @author Dymik739
+ */
+public class Sentence {
+    /** contains Word objects of this sentence */
+    private Word[] words;
+
+    /** contains a single punctuation mark that this sentence ends with */
+    private Symbol ending;
+
+    /**
+     * Constructor which automates the creation of a Sentence with just
+     * a single string.
+     *
+     * @since 0.2
+     * @param sentence string containing a sentence
+     */
+    public Sentence(String sentence) {
+        int totalSentenceLength = sentence.length();
+        this.ending = new Symbol(sentence.charAt(totalSentenceLength-1));
+
+        String[] rawWords = sentence.substring(0, totalSentenceLength-1)
+                                        .split(" ");
+
+        Word[] preparedWords = new Word[rawWords.length];
+
+        for (int i = 0; i < rawWords.length; i++) {
+            preparedWords[i] = new Word(rawWords[i]);
+        }
+
+        this.words = preparedWords;
+    }
+
+    /**
+     * Getter for picking a Word by it's array index.
+     *
+     * @since 0.2
+     * @param index index of the Word
+     * @return selected Word
+     */
+    public Word getWordByIndex(int index) {
+        return words[index];
+    }
+
+    /**
+     * Getter for the word array length.
+     *
+     * @since 0.2
+     * @return Word array length
+     */
+    public int getLength() {
+        return words.length;
+    }
+    
+    /**
+     * Method which allows to get index of a specific Word.
+     *
+     * @since 0.2
+     * @param w input word
+     * @return index of the Word (if found) or -1 (if not found)
+     */
+    public int index(Word w) {
+        int wordIndex = -1;
+
+        for (int i = 0; i < this.words.length; i++) {
+            if (this.words[i].equals(w)) {
+                wordIndex = i;
+                break;
+            }
+        }
+
+        return wordIndex;
+    }
+
+    /**
+     * Wrapper for removeWord(int) method which looks up the Word first.
+     *
+     * @since 0.2
+     * @param w Word to delete
+     */
+    public void removeWord(Word w) {
+        int deleteIndex = index(w);
+        removeWord(deleteIndex);
+    }
+
+    /**
+     * Method which allows to remove a Word from the sentence by it's index.
+     *
+     * @since 0.2
+     * @param deleteIndex index of the word to delete
+     */
+    public void removeWord(int deleteIndex) {
+        Word[] updatedArray = new Word[this.words.length-1];
+
+        for (int i = 0; i < deleteIndex; i++) {
+            updatedArray[i] = this.words[i];
+        }
+
+        for (int i = 0; i < this.words.length - deleteIndex - 1; i++) {
+            updatedArray[deleteIndex+i] = this.words[deleteIndex+i+1];
+        }
+
+        this.words = updatedArray;
+    }
+
+    /**
+     * Method which returns a String with simple listout of the words.
+     *
+     * @return String with word list
+     */
+    public String listWords() {
+        String result = "";
+
+        for (Word w : words) {
+            result += w.toStringClean() + ", ";
+        }
+
+        return result.substring(0, result.length()-2);
+    }
+    
+    /**
+     * Method which picks the unique word found in the words array.
+     *
+     * @return result string
+     */
+    public String getUniqueWord() {
+        if (words.length == 1) {
+            return "Unique word is " + words[0].toString();
+        } else if (words.length < 1) {
+            return "No words are in this sentence";
+        } else {
+            return "There are too many words to choose from (" +
+                   listWords() + ").";
+        }
+    }
+    
+    /**
+     * Method used to get a proper String representation of this sentence.
+     *
+     * @since 0.2
+     * @return String representation of this sentence
+     */
+    @Override
+    public String toString() {
+        String result = "";
+
+        for (Word i : this.words) {
+            result += i.toString() + " ";
+        }
+        
+        return result.substring(0, result.length()-1) + this.ending.toString();
+    }
+}

labs/5/Symbol.java

@@ -0,0 +1,66 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
+/**
+ * Class which represents a single character and replaces the default
+ * 'char' data type.
+ *
+ * @since 0.2
+ * @author Dymik739
+ */
+public class Symbol {
+    /** contains character that the object represents. */
+    private char symbol;
+    
+    /**
+     * Constructor which creates this object using a single char.
+     *
+     * @since the_world_was_created
+     * @param symbol character this object represents
+     */
+    public Symbol(char symbol) {
+        this.symbol = symbol;
+    }
+
+    /**
+     * Method used to get a proper String representation of this symbol.
+     *
+     * @since 0.2
+     * @return String representation of this symbol
+     */
+    @Override
+    public String toString() {
+        char[] arr = new char[1];
+        arr[0] = this.symbol;
+        return new String(arr);
+    }
+    
+    /**
+     * Method used to compare two symbols.
+     *
+     * @since 0.2
+     * @param o another symbol to compare to
+     * @return true if symbols are the same, false otherwise
+     */
+    public boolean equals(Symbol o) {
+        return this.symbol == o.symbol;
+    }
+}

labs/5/Text.java

@@ -0,0 +1,96 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
+/**
+ * Class representing the text being processed.
+ *
+ * @author Dymik739
+ * @since 0.2
+ */
+public class Text {
+    /** contains all the Sentence objects combining into the original text */
+    private Sentence[] sentences;
+    
+    /**
+     * Constructor which allows to create sentence from a string
+     *
+     * @since 0.2
+     * @param input string to be parsed as sentence
+     */
+    public Text(String input) {
+        String[] rawSentences = input.split("(?<=[.?!])( |$)");
+        Sentence[] newSentences = new Sentence[rawSentences.length];
+
+        for (int i = 0; i < rawSentences.length; i++) {
+            newSentences[i] = new Sentence(rawSentences[i]);
+        }
+
+        this.sentences = newSentences;
+    }
+    
+    /**
+     * Method that picks a sentence by it's array index
+     *
+     * @since 0.2
+     * @param index sentence id
+     * @return selected Sentence object
+     */
+    public Sentence getSentenceByIndex(int index) {
+        return sentences[index];
+    }
+    
+    /**
+     * Method for cleaning first sentence from words that are present
+     * in other sentences.
+     *
+     * @since 0.2
+     */
+    public void cleanFirstSentence() {
+        Word processedWord;
+
+        for (int i = 1; i < sentences.length; i++) {
+            for (int j = 0; j < sentences[i].getLength(); j++) {
+                processedWord = sentences[i].getWordByIndex(j);
+
+                while (sentences[0].index(processedWord) != -1) {
+                    sentences[0].removeWord(processedWord);
+                }
+            }
+        }
+    }
+
+    /**
+     * Method used to get a proper String representation of the text.
+     *
+     * @since 0.2
+     * @return String representation of the text
+     */
+    @Override
+    public String toString() {
+        String result = "";
+
+        for (Sentence s : this.sentences) {
+            result += s.toString() + " ";
+        }
+
+        return result;
+    }
+}

labs/5/Word.java

@@ -0,0 +1,134 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+
+/**
+ * Class representing a single word in the sentence.
+ *
+ * @author Dymik739
+ * @since 0.2
+ */
+public class Word {
+    /** contains the symbols that the word is made up of */
+    private Symbol[] symbols;
+
+    /** punctuation mark that follows the word */
+    private Symbol ending;
+    
+    /**
+     * Constructor that allows to create a word by having just a string.
+     *
+     * @since 0.2
+     * @param rawWord string that contains a parseable word.
+     */
+    public Word(String rawWord) {
+        Symbol p;                // punctuation mark
+        Symbol[] newWordArray;   // symbols that make up the word
+
+        Matcher punctuationMatcher = Pattern.compile("[,;:]$").matcher(rawWord);
+        String foundPunctuation;
+
+        Matcher wordMatcher = Pattern.compile("^[A-Za-z\\-']*").matcher(rawWord);
+        String foundWord;
+
+        if (punctuationMatcher.find()) {
+            p = new Symbol(rawWord.charAt(rawWord.length()-1));
+        } else {
+            p = new Symbol(' ');
+        }
+        
+        if (wordMatcher.find()) {
+            foundWord = wordMatcher.group();
+        } else {
+            foundWord = "";
+        }
+
+        newWordArray = new Symbol[foundWord.length()];
+
+        for (int i = 0; i < foundWord.length(); i++) {
+            newWordArray[i] = new Symbol(foundWord.charAt(i));
+        }
+
+        this.symbols = newWordArray;
+        this.ending = p;
+    }
+
+    /**
+     * Method for comparing two words.
+     *
+     * @since 0.2
+     * @param o Word to compare to
+     * @return true if words are the same, false otherwise
+     */
+    public boolean equals(Word o) {
+        if (o.symbols.length != this.symbols.length) {
+            return false;
+        }
+
+        for (int i = 0; i < this.symbols.length; i++) {
+            if (!this.symbols[i].equals(o.symbols[i])) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+
+    /**
+     * Method used to get a proper String representation of this word.
+     *
+     * @since 0.2
+     * @return String representation of this word
+     */
+    @Override
+    public String toString() {
+        String result = "";
+
+        for (Symbol i : this.symbols) {
+            result += i.toString();
+        }
+        
+        if (!this.ending.equals(new Symbol(' '))) {
+            result += this.ending.toString();
+        }
+
+        return result;
+    }
+
+    /**
+     * Method used to get a clean String representation of just this word.
+     *
+     * @since 0.2
+     * @return String representation of this word (without punctuation)
+     */
+    public String toStringClean() {
+        String result = "";
+
+        for (Symbol i : this.symbols) {
+            result += i.toString();
+        }
+        
+        return result;
+    }
+}

labs/5/lab5lib/Fetcher.java

@@ -0,0 +1,52 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package lab5lib;
+
+import java.util.Scanner;
+import java.lang.Exception;
+
+/**
+ * Class used as a connector for fetching content from Internet to provide
+ * the application with random text at every startup.
+ *
+ * @since 0.2
+ * @author Dymik739
+ */
+public class Fetcher {
+    /**
+     * Allows to fetch unique strings directly from the search engine
+     * 
+     * @since 0.2
+     *
+     * @return String received from the server
+     * @throws Exception in case if the server fails to provide the content
+     */
+    public static String fetchTextFromPython() throws Exception {
+        try {
+            Process contentFetcher = Runtime.getRuntime()
+                    .exec("python3 lab5lib/fetchContent.py");
+            Scanner reader = new Scanner(contentFetcher.getInputStream());
+            return new String(reader.nextLine());
+        } catch (Exception e) {
+            throw new Exception("Failed to fetch content from the server");
+        }
+    }
+}

labs/5/lab5lib/fetchContent.py

@@ -0,0 +1,10 @@
+import requests
+from random import randint
+import json
+
+r = requests.get("http://10.1.1.2:8080/search?q=test&format=json&language=en-US")
+
+results = json.loads(r.text)["results"]
+final_content = results[randint(0, len(results))]['content']
+
+print(final_content)

labs/6/Appliance.java

@@ -0,0 +1,155 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class representing a general appliance and containing basic methods
+ * that are used in multiple child classes. Supposed to be extended by
+ * other classes and not to be used as a standalone class.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class Appliance implements Comparable<Appliance> {
+    /** Indicates if this device is drawing power from the power network. */
+    private boolean powerConnected;
+
+    /** Defines the type of this device */
+    private String type;
+
+    /**
+     * Constructor for this class. Should be called only from within
+     * constructors of other classes which inherit this one.
+     *
+     * @param connected defines if the device is connected to the network
+     *                  at the start
+     */
+    public Appliance(boolean connected) {
+        this.powerConnected = connected;
+    }
+
+    /**
+     * Getter for checking the power connection.
+     *
+     * @return true if connected and false otherwise
+     */
+    public boolean getPowerState() {
+        return powerConnected;
+    }
+
+    /**
+     * Getter for the device type variable.
+     *
+     * @return device type string
+     */
+    public String getType() {
+        return type;
+    }
+
+    /**
+     * Setter for setting the device type string.
+     * Should be used only from the constructors of the classes
+     * which inherit this one!
+     *
+     * @param type type of the device
+     */
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    /**
+     * Method for connecting power to the device.
+     */
+    public void plug() {
+        powerConnected = true;
+    }
+
+    /**
+     * Method for disconnecting power from the device.
+     */
+    public void unplug() {
+        powerConnected = false;
+    }
+
+    /**
+     * Method for getting the smaller value out of two.
+     *
+     * @param v1 first value
+     * @param v2 second value
+     *
+     * @return smaller value of the two given
+     */
+    public float min(float v1, float v2) {
+        return v1 <= v2 ? v1 : v2;
+    }
+
+    /**
+     * Method for getting the bigger value out of two.
+     *
+     * @param v1 first value
+     * @param v2 second value
+     *
+     * @return bigger value of the two given
+     */
+    public float max(float v1, float v2) {
+        return v1 >= v2 ? v1 : v2;
+    }
+
+    /**
+     * Dummy method for getting the power consumption of the device.
+     * Should be overridden by the child class!
+     *
+     * @return current power consumption.
+     */
+    public float getPowerConsumption() {
+        return 0f;
+    }
+
+    /**
+     * Dummy method for performing the simulation.
+     * Should be overridden by the child class!
+     *
+     * @param seconds delta time for the correct simulation step
+     * @param ventRPM air flow created by the vent
+     */
+    public void step(float seconds, float ventRPM) {}
+
+    /**
+     * Method for calculating the EM radiation sent out by this device.
+     *
+     * @return amount of EM radiation
+     */
+    public float getRadiationAmount() {
+        System.out.println(getPowerConsumption());
+        return getPowerConsumption() * 0.1f;
+    }
+
+    /**
+     * Method for comparing this appliance's power consumption to another
+     * one. Part of the Comparable implementation.
+     *
+     * @param o another appliance to compare to
+     *
+     * @return difference between power consumption values
+     */
+    @Override
+    public int compareTo(Appliance o) {
+        return (int) (getPowerConsumption() - o.getPowerConsumption());
+    }
+}

labs/6/Dishwasher.java

@@ -0,0 +1,123 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class which represents the behaviour of a dishwasher.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class Dishwasher extends Appliance {
+    /** Defines power usage at different stages of washing dishes. */
+    private float[] powerStates = {400f, 60f, 130f, 350f};
+
+    /** Shows how much time should pass before switching to the next stage */
+    private float nextPowerStateIn = 20f;
+
+    /** Shows current stage the dishwasher is performing, -1 for none */
+    private int currentState = -1;
+
+    /**
+     * Constructor for this class.
+     *
+     * @param plugged sets the starting power state of this device
+     */
+    public Dishwasher(boolean plugged) {
+        super(plugged);
+        super.setType("Dishwasher");
+    }
+
+    /**
+     * Method for simulating the devices' behaviour.
+     * Once started, it goes through every stage until it finishes washing
+     * the dishes (every stage has it's own power usage level. After that,
+     * it resets the device and turns it off automatically.
+     *
+     * @param seconds delta time to simulate for
+     * @param ventRPM air flow created by the vent
+     */
+    public void step(float seconds, float ventRPM) {
+        if (!super.getPowerState()) {
+            return;
+        }
+
+        nextPowerStateIn -= seconds;
+
+        if (nextPowerStateIn <= 0) {
+            nextPowerStateIn += 20f;
+            currentState++;
+        }
+
+        if (currentState > 3) {
+            unplug();
+        }
+    }
+
+    /**
+     * Overridden method for turning on this device.
+     * It automatically sets it to the correct stage and delay.
+     */
+    @Override
+    public void plug() {
+        super.plug();
+
+        currentState = 0;
+        nextPowerStateIn = 20f;
+    }
+    
+    /**
+     * Overridden method for turning this device off.
+     * It automatically resets the current washing stage to -1.
+     */
+    @Override
+    public void unplug() {
+        super.unplug();
+
+        currentState = -1;
+    }
+
+    /**
+     * Method for calculating the power consumption of this device.
+     * Power usage depends on the current washing stage.
+     *
+     * @return float showing current power consumption
+     */
+    public float getPowerConsumption() {
+        if (super.getPowerState()) {
+            return powerStates[currentState];
+        } else {
+            return 0f;
+        }
+    }
+
+    /**
+     * Method for printing this devices' object in a nice way.
+     *
+     * @return String containing text description of this devices' state
+     */
+    @Override
+    public String toString() {
+        return String.format("Dishwasher(%s, %4.1fW, %2.1fs)",
+                super.getPowerState() ? "on" : "off", getPowerConsumption(),
+                super.getPowerState()
+                        ? (3 - currentState) * 20 + nextPowerStateIn
+                        : 0f);
+    }
+}

labs/6/LICENSE

@@ -0,0 +1,232 @@
+GNU GENERAL PUBLIC LICENSE
+Version 3, 29 June 2007
+
+Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+Preamble
+
+The GNU General Public License is a free, copyleft license for software and other kinds of works.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too.
+
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+
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+
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+
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+
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+
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+
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+
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+
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+0. Definitions.
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+
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+
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+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
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+5. Conveying Modified Source Versions.
+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
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+
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+
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+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
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+7. Additional Terms.
+“Additional permissions” are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law. If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
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+
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+
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+
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+
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+
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+
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+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Use with the GNU Affero General Public License.
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such.
+
+14. Revised Versions of this License.
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+
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+
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+
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+15. Disclaimer of Warranty.
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
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+
+17. Interpretation of Sections 15 and 16.
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the “copyright” line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
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+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
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+
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+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+
+     <program>  Copyright (C) <year>  <name of author>
+     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+     This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an “about box”.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a “copyright disclaimer” for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.

labs/6/Main.java

@@ -0,0 +1,450 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import java.util.Arrays;
+
+/**
+ * Main class that controls all the devices and regulates vent power.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class Main {
+    /**
+     * Defines the ServerRack power consumption at which the vent
+     * power is enabled.
+     */
+    private static final float VENT_START_POWER = 240f;
+
+    /**
+     * Defines the ServerRack power consumption at which the vent
+     * power is disabled.
+     */
+    private static final float VENT_STOP_POWER = 185f;
+
+    /** Defines magic number for real-time TTY output mode */
+    private static final int TTY_LIVE_MONITORING_MODE = 0;
+
+    /**
+     * Defines magic number for raw graph output mode for current
+     * power consumption and vent RPM
+     */
+    private static final int POWER_RPM_GRAPH_MODE = 1;
+
+    /** Defines magic number for raw graph output mode for total consumption */
+    private static final int TOTAL_CONSUMPTION_GRAPH_MODE = 2;
+
+    /**
+     * Defines magic number for raw graph output mode for vent rpm and
+     * power consumption relation
+     */
+    private static final int VENT_POWER_RPM_GRAPH_MODE = 1;
+
+    /** Defines the amount of simulation samples to get per every second */
+    private static final int TICKS_PER_SECOND = 960;
+
+    /** Defines the time simulation will run for (in seconds) */
+    private static final int SIMULATION_TIME = 240;
+
+    /**
+     * Main method for containing the devices, performing all
+     * checks and controlling power supply to all the appliances.
+     *
+     * @param args accepts CLI arguments.
+     */
+    public static void main(String[] args) {
+        float ventConsumed = 0f;
+        float totalPowerConsumed = 0f;
+
+        int outputMode = parseMode(args);
+        int liveStatsOutputDelay = parseOutputDelay(args);
+        float[] searchRange = parseSearchRange(args);
+
+        Vent vent = new Vent(false); // defining vent as a special appliance
+
+        Appliance[] devices = {
+            new ServerRack(false),
+            new ServerRack(false),
+            new RPI(false),
+            new Dishwasher(false)
+        };
+
+        devices[2].plug(); // turning on RPI right away
+                           // (RPI stands for Raspberry Pi)
+        
+        // letting the simulation run
+        for (int i = 1; i <= SIMULATION_TIME*TICKS_PER_SECOND; i++) {
+            step(vent, devices, (float) 1/TICKS_PER_SECOND); // stepping time
+
+            // performing accounting
+            ventConsumed += vent.getPowerConsumption() / TICKS_PER_SECOND;
+            totalPowerConsumed += getTotalPowerConsumption(vent, devices)
+                    / TICKS_PER_SECOND / 3600;
+            
+            // outputting the data in the desired format
+            if (outputMode == TTY_LIVE_MONITORING_MODE) {
+                System.out.print("Time: " + floatFormat((float)i/TICKS_PER_SECOND, 2, 2)
+                        + "; " + getStats(vent, devices) + "; vent avg = "
+                        + floatFormat(ventConsumed/TICKS_PER_SECOND/i, 4, 1)
+                        + "W; total = "
+                        + floatFormat(totalPowerConsumed, 4, 3) + "W\r");
+            } else if (outputMode == POWER_RPM_GRAPH_MODE) {
+                System.out.println(getTotalPowerConsumption(vent, devices)
+                        + " " + vent.getRPM()/10);
+            } else if (outputMode == TOTAL_CONSUMPTION_GRAPH_MODE) {
+                System.out.println(totalPowerConsumed);
+            } else if (outputMode == VENT_POWER_RPM_GRAPH_MODE) {
+                System.out.println(vent.getRPM()/10 + " "
+                        + vent.getPowerConsumption());
+            }
+
+            adjustVentPower(devices, vent);
+            
+            managePower(i, devices);
+            
+            if ((outputMode == TTY_LIVE_MONITORING_MODE)
+                    && (liveStatsOutputDelay != 0)) {
+                try {
+                    Thread.sleep(liveStatsOutputDelay);
+                } catch (Exception e) {
+                    System.exit(0);
+                }
+            }
+        }
+        
+        if (outputMode == TTY_LIVE_MONITORING_MODE) {
+            Appliance[] totalDevices = new Appliance[devices.length + 1];
+
+            for (int i = 0; i < devices.length; i++) {
+                totalDevices[i] = devices[i];
+            }
+
+            totalDevices[devices.length] = vent;
+
+            System.out.println("\nCurrently devices draw "
+                    + floatFormat(getTotalPowerConsumption(totalDevices), 4, 2)
+                    + "W from the power lines.");
+
+            Arrays.sort(totalDevices);
+
+            System.out.println("\nArray of appliances, sorted by the power "
+                    + "consumption:");
+            printAppliances(totalDevices);
+
+            Appliance[] foundItems = filterByRadiation(totalDevices, searchRange);
+
+            if (foundItems.length == 0) {
+                System.out.println("\nCould not find any devices that match "
+                        + "your request (" + searchRange[0] + "-"
+                        + searchRange[1] + ").");
+            } else {
+                System.out.println("\nFound items:");
+                printAppliances(foundItems);
+            }
+        }
+    }
+
+    /**
+     * Method which decides on how to manage the vent power supply.
+     * It looks at power consumption of every ServerRack device
+     * and:
+     * - turns the vent on if ANY of them meet the VENT_START_POWER threshold
+     * - turns the vent off if ALL of them meet the VENT_STOP_POWER threshold
+     *
+     * @param devices list of devices to look at.
+     * @param vent vent to manage power for.
+     */
+    public static void adjustVentPower(Appliance[] devices, Vent vent) {
+        for (Appliance i : devices) {
+            if ("ServerRack".equals(i.getType())
+                        && (i.getPowerConsumption() > VENT_START_POWER)) {
+                vent.plug();
+                return;
+            }
+        }
+
+        for (Appliance i : devices) {
+            if ("ServerRack".equals(i.getType())
+                        && !(i.getPowerConsumption() < VENT_STOP_POWER)) {
+                return;
+            }
+        }
+
+        vent.unplug();
+    }
+
+    /**
+     * Method that plugs in and out the devices in a predefined manner.
+     *
+     * @param i current simulation time.
+     * @param devices device list to control.
+     */
+    public static void managePower(int i, Appliance[] devices) {
+        if (i == 25 * TICKS_PER_SECOND) {
+            devices[1].plug();
+        } else if (i == 35 * TICKS_PER_SECOND) {
+            devices[0].plug();
+        } else if (i == 50 * TICKS_PER_SECOND) {
+            devices[0].unplug();
+        } else if (i == 60 * TICKS_PER_SECOND) {
+            devices[3].plug();
+        } else if (i == 130 * TICKS_PER_SECOND) {
+            devices[0].plug();
+        }
+    }
+
+    /**
+     * Method for printing out a gives array of appliances.
+     *
+     * @param devices appliance array to print out.
+     */
+    public static void printAppliances(Appliance[] devices) {
+        for (Appliance i : devices) {
+            System.out.println(i);
+        }
+    }
+
+    /**
+     * Method for selecting devices based on their radiation levels.
+     *
+     * @param totalDevices devices to select from
+     * @param searchRange search boundaries
+     *
+     * @return Appliance array containing found items
+     */
+    public static Appliance[] filterByRadiation(Appliance[] totalDevices, float[] searchRange) {
+        int l = -1;
+        int r = totalDevices.length;
+        boolean barrierFound;
+        
+        barrierFound = false;
+        for (int i = totalDevices.length-1; i >= 0; i--) {
+            if (totalDevices[i].getRadiationAmount() < searchRange[0]) {
+                l = i;
+                barrierFound = true;
+                break;
+            }
+        }
+
+        if (!barrierFound) {
+            l = -1;
+        }
+
+        barrierFound = false;
+        for (int i = 0; i < totalDevices.length; i++) {
+            if (totalDevices[i].getRadiationAmount() > searchRange[1]) {
+                r = i;
+                barrierFound = true;
+                break;
+            }
+        }
+
+        if (!barrierFound) {
+            r = totalDevices.length;
+        }
+
+        if (l < -1 || l >= totalDevices.length || l >= r
+                || r < 1 || r >= totalDevices.length + 1 || (r-l) == 1) {
+            Appliance[] foundItems = new Appliance[0];
+            return foundItems;
+        } else {
+            Appliance[] foundItems = new Appliance[r-l-1];
+
+            for (int i = l+1; i < r; i++) {
+                foundItems[i-l-1] = totalDevices[i];
+            }
+
+            return foundItems;
+        }
+    }
+
+    /**
+     * Method for extracting output mode setting set from CLI.
+     *
+     * @param args CLI args array to use.
+     *
+     * @return int representing requested mode.
+     */
+    public static int parseMode(String[] args) {
+        for (String i : args) {
+            if ("--power-rpm-graph".equals(i)) {
+                return POWER_RPM_GRAPH_MODE;
+            } else if ("--total-consumption-graph".equals(i)) {
+                return TOTAL_CONSUMPTION_GRAPH_MODE;
+            } else if ("--vent-monitoring-graph".equals(i)) {
+                return VENT_POWER_RPM_GRAPH_MODE;
+            }
+        }
+
+        return TTY_LIVE_MONITORING_MODE;
+    }
+
+    /**
+     * Method for extracting output delay setting set from CLI.
+     *
+     * @param args CLI args array to use.
+     *
+     * @return delay in miliseconds.
+     */
+    public static int parseOutputDelay(String[] args) {
+        for (int i = 0; i < args.length; i++) {
+            if ("--output-delay".equals(args[i])) {
+                return Integer.parseInt(args[i+1]);
+            }
+        }
+
+        return (int) (1000 / TICKS_PER_SECOND);
+    }
+
+    /**
+     * Method for extracting output delay setting set from CLI.
+     *
+     * @param args CLI args array to use.
+     *
+     * @return delay in miliseconds.
+     */
+    public static float[] parseSearchRange(String[] args) {
+        for (int i = 0; i < args.length; i++) {
+            if ("--search".equals(args[i])) {
+                String[] rawParams = args[i+1].split("-");
+                float[] bakedParams = new float[2];
+
+                for (int j = 0; j < 2; j++) {
+                    bakedParams[j] = Float.parseFloat(rawParams[j]);
+                }
+
+                return bakedParams;
+            }
+        }
+
+        float[] bakedParams = {0f, 0f};
+        return bakedParams;
+    }
+
+    /**
+     * Method for performing the simulation. Runs the respective .step()
+     * methods on all of the given appliances.
+     *
+     * @param vent vent object to process
+     * @param devices devices array to process
+     * @param seconds delta time to move forward.
+     */
+    public static void step(Vent vent, Appliance[] devices, float seconds) {
+        vent.step(seconds);
+        for (Appliance i : devices) {
+            i.step(seconds, vent.getRPM());
+        }
+    }
+
+    /**
+     * Method for collecting the overall usage statistics to make it
+     * easy to output status line during TTY mode execution.
+     *
+     * @param vent vent object to track
+     * @param devices devices array to track
+     *
+     * @return String containing current stats for all the devices
+     */
+    public static String getStats(Vent vent, Appliance[] devices) {
+        float[] powerConsumption = new float[devices.length];
+        float totalPowerConsumption = 0;
+
+        for (int i = 0; i < devices.length; i++) {
+            powerConsumption[i] = devices[i].getPowerConsumption();
+            totalPowerConsumption += devices[i].getPowerConsumption();
+        }
+
+        String result = "PPD: ";
+
+        for (float i : powerConsumption) {
+            result += String.format(floatFormat(i, 3, 1) + "W ");
+        }
+
+        float powerLinesDraw = totalPowerConsumption
+                + vent.getPowerConsumption();
+
+        result += "; Vent: " + floatFormat(vent.getPowerConsumption(), 3, 1)
+                + "W, " + floatFormat(vent.getRPM(), 5, 0)
+                + " RPM; Total power: " + floatFormat(powerLinesDraw, 4, 1)
+                + "W";
+
+        return result;
+    }
+
+    /**
+     * Overloaded method for calculating the total power consumption
+     * (devices + the vent).
+     *
+     * @param vent vent to account
+     * @param devices array of devices to account
+     *
+     * @return sum of all the .getPowerConsumption() returned from devices
+     */
+    public static float getTotalPowerConsumption(Vent vent,
+            Appliance[] devices) {
+        float result = vent.getPowerConsumption();
+
+        for (Appliance a : devices) {
+            result += a.getPowerConsumption();
+        }
+
+        return result;
+    }
+
+    /**
+     * Overloaded method for calculating the total power consumption
+     * (devices only).
+     *
+     * @param devices array of devices to account
+     *
+     * @return sum of all the .getPowerConsumption() returned from devices
+     */
+    public static float getTotalPowerConsumption(Appliance[] devices) {
+        float result = 0;
+
+        for (Appliance a : devices) {
+            result += a.getPowerConsumption();
+        }
+
+        return result;
+    }
+
+    /**
+     * Custom method which adds the support for arbitrary formatting of float
+     * numbers.
+     *
+     * @param num value to format
+     * @param leading amount of digits before period to print
+     * @param trailing amount of digits after perio to print
+     *
+     * @return String with formatted result
+     */
+    public static String floatFormat(float num, int leading, int trailing) {
+        String newNum = String.format("%0" + leading + "." + trailing + "f", num);
+
+        int targetLength = leading + trailing + 1;
+
+        for (int i = newNum.length(); i < targetLength; i++) {
+            newNum = "0" + newNum;
+        }
+
+        return newNum;
+    }
+}

labs/6/Makefile

@@ -0,0 +1,5 @@
+build:
+	javac *.java
+
+clean:
+	rm *.class

labs/6/RPI.java

@@ -0,0 +1,105 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class which represents the RPI (Raspberry Pi) microcomputer.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class RPI extends Appliance {
+    /** Contains current power draw from the power supply. */
+    private float power = 15.0f;
+
+    /**
+     * Defines the delay after the startup when the power usage starts to drop
+     * to it's lowest value.
+     */
+    private float postBootDecreaseIn = 10.0f;
+
+    /**
+     * Constructor for this class.
+     *
+     * @param plugged sets the power state on the beginning
+     */
+    public RPI(boolean plugged) {
+        super(plugged);
+        super.setType("RPI");
+    }
+
+    /**
+     * Method which is used to simulate the device's behaviour.
+     * The device draws it's maximum power for postBootDecreaseIn
+     * seconds and gradually drops to it's lowest level, after that
+     * it always stays on the lowest power usage level until a
+     * reboot happens.
+     *
+     * @param seconds delta time to simulate for
+     * @param ventRPM air flow generated by the vent
+     */
+    public void step(float seconds, float ventRPM) {
+        postBootDecreaseIn -= seconds;
+
+        if ((postBootDecreaseIn <= 0) && (power >= 5.0)) {
+            power -= seconds;
+        }
+
+        if (power < 5.0) {
+            power = 5.0f;
+        }
+    }
+
+    /**
+     * Custom method for unplugging the device.
+     * Adds the automatic resetting to the default values right after
+     * turning the device off.
+     */
+    @Override
+    public void unplug() {
+        super.unplug();
+
+        power = 15f;
+        postBootDecreaseIn = 10f;
+    }
+
+    /**
+     * Method for getting the power draw of this device.
+     *
+     * @return current power consumption
+     */
+    public float getPowerConsumption() {
+        if (super.getPowerState()) {
+            return power;
+        } else {
+            return 0f;
+        }
+    }
+
+    /**
+     * Method for printing this devices' object in a nice way.
+     *
+     * @return String containing text description of this devices' state
+     */
+    @Override
+    public String toString() {
+        return String.format("RPI(%s, %4.1fW)",
+                super.getPowerState() ? "on" : "off", getPowerConsumption());
+    }
+}

labs/6/ServerRack.java

@@ -0,0 +1,124 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class which represents a server rack.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class ServerRack extends Appliance {
+    /** Defines power used by the rack at lowest temperature. */
+    private float basePower = 160.0f;
+
+    /** Defines power limit for this rack */
+    private float maxPower = 350.0f;
+
+    /** Contains the inner temperature of this rack */
+    private float temperature = 20f;
+
+    /** Defines current usage of this device */
+    private float currentLoad = 0.2f;
+
+    /** Predicts the future change of the load */
+    private float loadVector = +1f;
+
+    /**
+     * Constructor for this class.
+     *
+     * @param plugged defines if the device is plugged in at the start
+     */
+    public ServerRack(boolean plugged) {
+        super(plugged);
+        super.setType("ServerRack");
+    }
+
+    /**
+     * Method for simulating this device behaviour.
+     * This rack processes video segments for the streaming platform and
+     * serves them to the public in different qualities. Every device requires
+     * the fragments to be encoded in it's respective format in order to play
+     * the stream. As such, the load rises when new fragment arrives and falls
+     * as it converts it into all the formats required.
+     *
+     * Temperature depends on many factors. Firstly, the device heats up while
+     * performing tasks and the rate is affected by:
+     * - current temperature (hotter = more power drawn);
+     * - load on the CPU (more load = more heat);
+     *
+     * Of course, the temperature can be reduced using the vent installed in
+     * the house. The rate of reduction is calculated using:
+     * - current temperature (the bigger the difference compared to the outside
+     *   temperature, the larger impact the vent has on it);
+     * - air flow, created by the vent (the faster the air moves, the more
+     *   heat it takes away from the system);
+     *
+     * This device can also cool itself down while standing still as the heat
+     * slowly transfers to the air even when the vent doesn't force it.
+     * The rate is calculated by only the temperature difference between inner
+     * and outer temperatures.
+     *
+     * @param seconds delta time to simulate for
+     * @param ventRPM air flow created by the vent
+     */
+    public void step(float seconds, float ventRPM) {
+        currentLoad += loadVector/10 * seconds;
+
+        if (currentLoad >= 1) {
+            loadVector = -1f;
+        } else if (currentLoad <= 0.2) {
+            loadVector = +1f;
+        }
+
+        if (super.getPowerState()) {
+            temperature += min(basePower + (temperature - 20f) * 1.8f
+                    * max(min(currentLoad, 1), 0), maxPower) * seconds
+                    * 0.024f;
+        }
+
+        temperature -= (temperature - 20f) * ventRPM * 0.00013f * seconds;
+        temperature -= 0.002f * (temperature - 20f) * seconds;
+    }
+
+    /**
+     * Method which calculates power consumption if this device.
+     *
+     * @return power consumption of this device
+     */
+    public float getPowerConsumption() {
+        if (super.getPowerState()) {
+            return min(basePower + (temperature - 20f) * 1.8f * max(min(currentLoad, 1), 0), maxPower);
+        } else {
+            return 0f;
+        }
+    }
+
+    /**
+     * Overridden toString() method for printing the state of this device.
+     *
+     * @return String representing current state of this device
+     */
+    @Override
+    public String toString() {
+        return String.format("ServerRack(%s, %4.1fW, %3.1f℃C, %3.1f%%)",
+                super.getPowerState() ? "on" : "off", getPowerConsumption(),
+                temperature, currentLoad * 100);
+    }
+}

labs/6/Vent.java

@@ -0,0 +1,154 @@
+/*
+ * %W% %E% Dymik739
+ * Email: dymik739@109.86.70.81
+ *
+ * Copyright (C) 2023 FIOT Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class that represents a vent installed in the house.
+ * This device acts as a reactive load.
+ *
+ * @author Dymik739
+ * @since 0.3
+ */
+public class Vent extends Appliance {
+    /**
+     * Power draw limit set by the digital controller, designed by a KPI 
+     * student. Built with the JK-triggers, may malfunction sometimes.
+     * Exceeding this limit may damage the engine, so it's hard limited.
+     */
+    private float maxPower = 80.0f;
+
+    /**
+     * Current rotor revolutions per minute.
+     * Can also be defined as angular velocity or kinetic energy
+     * accumulated in the device.
+     */
+    private float rpm = 0.0f;
+
+    /**
+     * Defines inertia of the rotor.
+     * Allows the rotor to withstand forces changing it's angular speed.
+     */
+    private final float rotorInertia = 2.0f;
+
+    /**
+     * Target RPM the vent is tuned to maintain.
+     * Rotor draws full power until it reaches this speed, after that it
+     * draws only as much power as needed to maintain this speed.
+     *
+     * Might be tweaked up to match the exact RPM required, as the target
+     * RPM is more than actual RPM while running due to additional forces
+     * and failures in design of the microcontroller (it was also designed
+     * using JK-triggers as they were the ones that student used in their
+     * coursework last year).
+     */
+    private final float maxRPM = 2013.0f;
+
+    /**
+     * Constructor for this class.
+     *
+     * @param plugged defines if the device is plugged into the power
+     *                network right away
+     */
+    public Vent(boolean plugged) {
+        super(plugged);
+        super.setType("Vent");
+    }
+
+    /**
+     * Method for simulating the device behaviour.
+     * As was stated before in the class docs, this device has reactive
+     * properties when it comes to loading the network. This means, it
+     * doesn't only change it's power usage during operation, but also
+     * follows some real-world physics laws while running.
+     *
+     * First, it uses the power, limited by a device microcontroller,
+     * to gain angular velocity, measured in RPM. Right before it reaches
+     * it's target RPM, the power draw falls with the exponential decrement
+     * law (can be seen from the graph in --vent-monitoring-graph mode).
+     *
+     * Once it meets the target RPM, it draws power to only maintain it's
+     * speed (the power goes to withstand air forces trying to slow the
+     * fan - and the attached rotor - down).
+     *
+     * After the power cuts off, the fan keeps rotating due to it's inertia
+     * and, when plugged back in, starts getting back up to it's target speed
+     * according to it's current RPM. The power draw from the network always
+     * meets the power used to gain angular velocity of the rotor.
+     *
+     * Also, as this vent is forcing the air through, the blades experience
+     * the air drag - it always tries to slow the fan down. As such, the
+     * air rag force is always calculated and depends of the RPM, which
+     * is proportional to the force being put on the blades.
+     *
+     * And the engineering level is kind of weird: on one hand, they
+     * engineer a smark device that can manage the RPM and limit the power
+     * to the rotor, but on the other hand they're unable to deal with
+     * reverse polarity the rotor generates while running, so they've
+     * just soldered a single diode on the wire and thus limited
+     * power down to just 80W! At least, the vent is still functional, so
+     * I guess it's good enough...
+     *
+     * @param seconds delta time to simulate for
+     */
+    public void step(float seconds) {
+        // electric current usage
+        if (super.getPowerState()) {
+            rpm += max(min(((int) (maxRPM - rpm) * rotorInertia), maxPower), 0)
+                * 10 / rotorInertia * seconds;
+        }
+        
+        // air drag (always present)
+        rpm -= (rpm / 20) / rotorInertia * seconds;
+    }
+
+    /**
+     * Method for calculating current power consumption of this device.
+     * Calculations are similar to the step() method above.
+     *
+     * @return current power consumption of this device
+     */
+    public float getPowerConsumption() {
+        if (super.getPowerState()) {
+            return max(min(rotorInertia*(maxRPM - rpm), maxPower), 0);
+        } else {
+            return 0f;
+        }
+    }
+
+    /**
+     * Getter for RPM.
+     *
+     * @return current RPM
+     */
+    public float getRPM() {
+        return rpm;
+    }
+
+    /**
+     * Method for ptinting out this device state in a nice way.
+     *
+     * @return string representation of this device state
+     */
+    @Override
+    public String toString() {
+        return String.format("Vent(%s, %4.1fW, %4.0f RPM)",
+                super.getPowerState() ? "on" : "off", getPowerConsumption(),
+                rpm);
+    }
+}

labs/6/plotter.py

@@ -0,0 +1,15 @@
+import matplotlib.pyplot as plt
+
+data = []
+
+while True:
+    try:
+        data.append(list(map(float, input().split())))
+    except:
+        break
+
+#print(list(zip(*data)))
+
+for i in list(zip(*data)):
+    plt.plot(i)
+plt.show()