feat: improve draft of consumer app to write in db

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "editor.defaultFormatter": "charliermarsh.ruff"
+}

app/consumer/main.py

@@ -1,30 +1,103 @@
 import paho.mqtt.client as mqtt
+import psycopg2
 import logging
 import sys
+import json
+import os
+import time
+
+MQTT_HOST = os.getenv("MQTT_HOST", "mosquitto")
+MQTT_PORT = int(os.getenv("MQTT_PORT", 1883))
+PG_DSN = os.getenv("DATABASE_URL", "postgresql://simugaz:simugaz@db/simugaz")
 
 logging.basicConfig(
     level=logging.INFO,
     format="%(asctime)s [%(levelname)s] %(message)s",
     datefmt="%Y-%m-%dT%H:%M:%S",
-    stream=sys.stdout,   # Docker lit stdout par défaut
-    force=True
+    stream=sys.stdout,
+    force=True,
 )
-
 log = logging.getLogger(__name__)
 
 
+def get_db():
+    for _ in range(10):
+        try:
+            conn = psycopg2.connect(PG_DSN)
+            conn.autocommit = True
+            log.info("PostgreSQL connecté")
+            return conn
+        except Exception as e:
+            log.warning(f"Attente PostgreSQL... ({e})")
+            time.sleep(3)
+    raise RuntimeError("Impossible de se connecter à PostgreSQL")
+
+
+def get_device_id(conn, dev_eui: str) -> str:
+    """
+    Insère le device si inconnu
+    Retourne le device_id correspondant au dev_eui
+    """
+    with conn.cursor() as cur:
+        cur.execute(
+            """
+            INSERT INTO device (device_eui)
+            VALUES (%s)
+            ON CONFLICT (device_eui) DO NOTHING
+        """,
+            (dev_eui,),
+        )
+
+        cur.execute("SELECT device_id FROM device WHERE device_eui = %s", (dev_eui,))
+        row = cur.fetchone()
+        return str(row[0])
+
+
+def insert_reading(conn, device_id: str, pulses: int):
+    """Insère une télérelève liée au device"""
+    with conn.cursor() as cur:
+        cur.execute(
+            """
+            INSERT INTO reading (device_id, date, pulses)
+            VALUES (%s, NOW(), %s)
+        """,
+            (device_id, pulses),
+        )
+
+
+db_conn = None
+
+
 def on_connect(client, userdata, flags, reason_code, properties):
-    log.info(f"Connected with result code {reason_code}")
-    client.subscribe("application/+/device/+/event/up")
+    log.info(f"MQTT connecté (code={reason_code})")
+    client.subscribe("application/+/device/+/event/up", qos=1)
+
 
 def on_message(client, userdata, msg):
-    log.info(msg.topic+" "+str(msg.payload))
+    try:
+        body = json.loads(msg.payload)
+        dev_eui = body["deviceInfo"]["devEui"]
+        pulses = int(body["object"]["pulse_count"])
+
+        device_id = get_device_id(db_conn, dev_eui)
+        insert_reading(db_conn, device_id, pulses)
+
+        log.info(
+            f"[UP] dev_eui={dev_eui} | device_id={device_id} | pulses={pulses}| relevé inséré"
+        )
+
+    except Exception as e:
+        log.exception(f"Erreur traitement message : {e}")
 
 
+# ── Main ─────────────────────────────────────────────────────────
 if __name__ == "__main__":
+    db_conn = get_db()
+
     mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2)
     mqttc.on_connect = on_connect
     mqttc.on_message = on_message
+    mqttc.reconnect_delay_set(min_delay=1, max_delay=30)
 
-    mqttc.connect("mosquitto", 1883, 60)
+    mqttc.connect(MQTT_HOST, MQTT_PORT, 60)
     mqttc.loop_forever()

app/consumer/requirements.txt

@@ -1 +1,2 @@
 paho-mqtt==v2.1.0
+psycopg2-binary