SCRUM-34: slobodeniuk parking signals

.gitignore

@@ -1,2 +1,4 @@
 agent/docker/mosquitto/data/
-agent/docker/mosquitto/log/
+agent/docker/mosquitto/log/
+
+.idea/

agent/src/domain/aggregated_data.py

@@ -1,13 +1,16 @@
 from dataclasses import dataclass
 
 from datetime import datetime
-from domain.accelerometer import Accelerometer
+
-from domain.gps import Gps
+from agent.src.domain.accelerometer import Accelerometer
+from agent.src.domain.gps import Gps
+from agent.src.domain.parking import Parking
 
 
 @dataclass
 class AggregatedData:
     accelerometer: Accelerometer
     gps: Gps
+    parking: Parking
     timestamp: datetime
     user_id: int

agent/src/domain/parking.py

@@ -0,0 +1,9 @@
+from dataclasses import dataclass
+
+from agent.src.domain.gps import Gps
+
+
+@dataclass
+class Parking:
+    empty_count: int
+    gps: Gps

agent/src/file_datasource.py

@@ -4,6 +4,7 @@ from datetime import datetime
 from pathlib import Path
 from typing import Optional, List
 
+from domain.parking import Parking
 from domain.accelerometer import Accelerometer
 from domain.gps import Gps
 from domain.aggregated_data import AggregatedData
@@ -12,12 +13,22 @@ import config
 
 class FileDatasource:
 
-    def __init__(self, accelerometer_filename: str, gps_filename: str) -> None:
+    def __init__(
+            self,
+            accelerometer_filename: str,
+            gps_filename: str,
+            park_filename: str,
+    ) -> None:
+
         self.accelerometer_filename = accelerometer_filename
+        self.park_filename = park_filename
         self.gps_filename = gps_filename
 
+        self._park_f = None
         self._acc_f = None
         self._gps_f = None
+
+        self._park_reader: Optional[csv.reader] = None
         self._acc_reader: Optional[csv.reader] = None
         self._gps_reader: Optional[csv.reader] = None
 
@@ -30,6 +41,8 @@ class FileDatasource:
 
         if not Path(self.accelerometer_filename).exists():
             raise FileNotFoundError(f"Accelerometer file not found: {self.accelerometer_filename}")
+        if not Path(self.park_filename).exists():
+            raise FileNotFoundError(f"Accelerometer file not found: {self.park_filename}")
         if not Path(self.gps_filename).exists():
             raise FileNotFoundError(f"GPS file not found: {self.gps_filename}")
 
@@ -47,9 +60,11 @@ class FileDatasource:
             raise RuntimeError("Datasource is not started. Call startReading() before read().")
 
         acc_row = self._get_next_row(self._acc_reader, source="acc")
+        park_row = self._get_next_row(self._park_reader, source="park")
         gps_row = self._get_next_row(self._gps_reader, source="gps")
 
         acc = self._parse_acc(acc_row)
+        park = self._parse_park(park_row)
         gps = self._parse_gps(gps_row)
 
         # IMPORTANT: timing belongs to datasource (not MQTT / main.py)
@@ -59,6 +74,7 @@ class FileDatasource:
         return AggregatedData(
             accelerometer=acc,
             gps=gps,
+            parking=park,
             timestamp=datetime.utcnow(),
             user_id=config.USER_ID,
         )
@@ -69,14 +85,17 @@ class FileDatasource:
         self._close_files()
 
         self._acc_f = open(self.accelerometer_filename, "r", newline="", encoding="utf-8")
+        self._park_f = open(self.park_filename, "r", newline="", encoding="utf-8")
         self._gps_f = open(self.gps_filename, "r", newline="", encoding="utf-8")
 
         self._acc_reader = csv.reader(self._acc_f, skipinitialspace=True)
+        self._park_reader = csv.reader(self._park_f, skipinitialspace=True)
         self._gps_reader = csv.reader(self._gps_f, skipinitialspace=True)
 
         # File pointer is already at 0 right after open(), so no need to rewind here.
         # Skip header row once.
         next(self._acc_reader, None)
+        next(self._park_reader, None)
         next(self._gps_reader, None)
 
     def _close_files(self) -> None:
@@ -88,8 +107,10 @@ class FileDatasource:
                 pass
 
         self._acc_f = None
+        self._park_f = None
         self._gps_f = None
         self._acc_reader = None
+        self._park_reader = None
         self._gps_reader = None
 
     def _rewind_acc(self) -> None:
@@ -106,6 +127,13 @@ class FileDatasource:
         self._gps_reader = csv.reader(self._gps_f, skipinitialspace=True)
         next(self._gps_reader, None)  # skip header row
 
+    def _rewind_park(self) -> None:
+        if self._park_f is None:
+            raise RuntimeError("GPS file is not open.")
+        self._park_f.seek(0)
+        self._park_reader = csv.reader(self._park_f, skipinitialspace=True)
+        next(self._park_reader, None)  # skip header row
+
     def _get_next_row(self, reader, source: str) -> List[str]:
         """Get the next valid row from the reader."""
         if reader is None:
@@ -118,6 +146,10 @@ class FileDatasource:
                 if source == "acc":
                     self._rewind_acc()
                     reader = self._acc_reader
+
+                elif source == 'park':
+                    self._rewind_park()
+                    reader = self._park_reader
                 else:
                     self._rewind_gps()
                     reader = self._gps_reader
@@ -148,4 +180,17 @@ class FileDatasource:
             raise ValueError(f"GPS row must have 2 values (longitude,latitude). Got: {row}")
         lon = float(row[0])
         lat = float(row[1])
-        return Gps(longitude=lon, latitude=lat)
+        return Gps(longitude=lon, latitude=lat)
+
+    @staticmethod
+    def _parse_park(row: List[str]) -> Parking:
+        if len(row) < 2:
+            raise ValueError(f"GPS row must have 2 values (longitude,latitude). Got: {row}")
+        lon = float(row[0])
+        lat = float(row[1])
+        empty_count = int(row[2])
+
+        return Parking(
+            gps=Gps(longitude=lon, latitude=lat),
+            empty_count=empty_count,
+        )

agent/src/main.py

@@ -37,10 +37,10 @@ def run():
     # Prepare mqtt client
     client = connect_mqtt(config.MQTT_BROKER_HOST, config.MQTT_BROKER_PORT)
     # Prepare datasource
-    datasource = FileDatasource("data/accelerometer.csv", "data/gps.csv")
+    datasource = FileDatasource("data/accelerometer.csv", "data/gps.csv", "data/parking.csv")
     # Infinity publish data
     publish(client, config.MQTT_TOPIC, datasource)
 
 
 if __name__ == "__main__":
-    run()
+    run()

agent/src/schema/parking_schema.py

@@ -0,0 +1,8 @@
+from marshmallow import Schema, fields
+
+from agent.src.schema.gps_schema import GpsSchema
+
+
+class ParkingSchema(Schema):
+    gps = fields.Nested(GpsSchema)
+    empty_count = fields.Int()