Initial commit

main.py

@@ -0,0 +1,200 @@
+from telegram.ext import Updater, MessageHandler, Filters
+import codecs
+import time
+import json
+import sys
+import os
+import threading
+
+# global variables
+STOP_REQUESTED = False
+
+# some functions that increase readability of the code
+def readfile(filename):
+    try:
+        return codecs.open(filename, encoding = "utf-8").read()
+    except FileNotFoundError:
+        return False
+    except Exception as e:
+        print( "[ERROR] Unexpected error occured in readfile() ({0})".format(e) )
+        return False
+
+# module object classes
+class ModuleV1:
+    def __init__(self, path, code, enabled, alias):
+        self.version = 1
+        self.enabled = enabled
+        self.code = code
+        self.alias = alias
+        self.path = path
+
+    # set environmental variables
+    def set_env(self):
+        self.RESPONCE = ""
+
+    # running the module
+    def process(self, msg):
+        self.set_env()
+
+        self.MESSAGE = msg
+        try:
+            exec(self.code)
+            return self.RESPONCE
+        except Exception as e:
+            print("[ERROR] module: module \"{}\" ({}) raised exception \"{}\"".format(self.path, self.alias, e))
+
+
+# module control unit
+class ModuleControlUnit:
+    def __init__(self):
+        self.modules = []
+        self.reload_modules()
+
+        print("[INFO] ModuleControlUnit: initialized successfully")
+
+    def reload_modules(self):
+        for folder in os.listdir("modules/"):
+            try:
+                meta_raw = readfile("modules/{}/meta.json".format(folder))
+                if not meta_raw:
+                    print("[WARN] module_loader: no meta.json found in module folder \"{}\"".format(folder))
+                    continue
+
+                meta = json.loads( meta_raw )
+                if "version" in meta:
+                    if meta["version"] == 1:
+                        if "index_file" in meta:
+                            index_file = meta["index_file"]
+                        else:
+                            index_file = "index.py"
+
+                        code = readfile( "modules/{}/{}".format(folder, index_file) )
+                        if not code: # False both when readfile() returns False and when the code string is empty
+                            print("[WARN] reload_modules: module {} does not have any code, skipping...".format(folder))
+                            continue
+                        
+                        if "start_on_boot" in meta:
+                            enabled = meta["start_on_boot"]
+                        else:
+                            enabled = False
+
+                        if "alias" in meta:
+                            alias = meta["alias"]
+                        else:
+                            alias = None
+
+                        self.modules.append( ModuleV1( "modules/{}/".format(folder), code, enabled, alias ) )
+
+                        print("[INFO] reload_modules: successfully loaded {} as {}".format(folder, alias))
+                    else:
+                        print("[WARN] reload_modules: module {} requires unsupported version ({} > 1), skipping...".format(folder, meta["version"]))
+            except Exception as e:
+                print("[ERROR] module_loader: error while loading module \"{}\" ({})".format(folder, e))
+
+    def reload_module(self, folder_name):
+        try:
+            meta_raw = readfile("modules/{}/meta.json".format(folder))
+            if not meta_raw:
+                print("[WARN] module_loader: no meta.json found in module folder \"{}\"".format(folder_name))
+                return 1
+
+            meta = json.loads( readfile("modules/{}/meta.json".format(folder_name)) )
+            if "version" in meta:
+                if meta["version"] == 1:
+                    if "index_file" in meta:
+                        index_file = meta["index_file"]
+                    else:
+                        index_file = "index.py"
+
+                    code = readfile( "modules/{}/{}".format(folder_name, index_file) )
+                    if not code: # False both when readfile() returns False and when the code string is empty
+                        print("[WARN] reload_modules: module {} does not have any code, skipping...".format(folder_name))
+                
+                    if "start_on_boot" in meta:
+                        enabled = meta["start_on_boot"]
+                    else:
+                        enabled = False
+
+                    if "alias" in meta:
+                        alias = meta["alias"]
+                    else:
+                        alias = None
+
+                    self.modules.append( ModuleV1( code, enabled, alias ) )
+
+                    print("[INFO] reload_modules: successfully loaded {} as {}".format(folder_name, alias))
+                else:
+                    print("[WARN] reload_modules: module {} requires unsupported version ({} > 1), skipping...".format(folder_name, meta["version"]))
+        except Exception as e:
+            print("[ERROR] module_loader: error while loading module \"{}\" ({})".format(folder_name, e))
+
+# message queue object to go back to synchronous message processing
+#class MessageQueue:
+#    def __init__(self):
+#        print("[INFO] Initializing the message queue...")
+#        self.queue = []
+
+
+# synchronous message processor
+def queue_processor():
+    while True:
+        if len(message_queue) > 0:
+            msg = message_queue[0]
+            print("[DEBUG] queue_processor: {}".format(msg)) # debug
+
+            # modules will be used in here
+            for mod in mcu.modules:
+                if mod.enabled:
+                    if mod.version == 1:
+                        responce = mod.process(msg)
+                        if len(responce) > 0:
+                            updater.bot.send_message(chat_id = msg.chat.id, text = responce)
+                            print("Responded using module {} ({}) with text: {}".format(mod.path, mod.alias, responce))
+                            break
+
+            del message_queue[0]
+        else:
+            if STOP_REQUESTED:
+                break
+            else:
+                time.sleep(1)
+
+    print("[INFO] queue_processor thread stops successfully")
+
+
+# telegram bot processor
+def message_handler(update, context):
+    print("[DEBUG] Received new message") # just for testing
+    message_queue.append(update.message)
+
+
+# --- Final stage ---
+
+
+# initializing services and queues
+
+message_queue = []
+
+mcu = ModuleControlUnit()
+
+processor_thread = threading.Thread( target = queue_processor, args = [] )
+processor_thread.start()
+
+
+# connecting to Telegram servers and listening for messages
+
+TOKEN = readfile("config/token")
+if not TOKEN:
+    print("[CRIT] Token has not been defined, quitting")
+    sys.exit(1)
+
+# connect to Telegram servers
+updater = Updater(TOKEN, use_context = True)
+dispatcher = updater.dispatcher
+
+# assign the handler for messages
+dispatcher.add_handler(MessageHandler(Filters.text, message_handler))
+
+# run the bot
+updater.start_polling()
+updater.idle()

modules/echo-v1.0/index.py

@@ -0,0 +1 @@
+self.RESPONCE = self.MESSAGE["text"]

modules/echo-v1.0/meta.json

@@ -0,0 +1,5 @@
+{
+    "version": 1,
+    "index_file": "index.py",
+    "start_on_boot": true
+}