refacto: reorganize files to easily add an API service

server/app/adapters/postgres.py

@@ -0,0 +1,63 @@
+import logging
+import time
+
+import psycopg2
+from psycopg2.extensions import connection
+from ports import DeviceRepository, ReadingRepository
+from domain.exceptions import DatabaseConnectionError, DatabaseError
+
+log = logging.getLogger(__name__)
+
+def connect(uri: str, retries: int = 10, base_delay: float = 1.0) -> connection:
+    for attempt in range(retries):
+        try:
+            conn = psycopg2.connect(uri)
+            conn.autocommit = True
+            log.info("PostgreSQL connecté")
+            return conn
+        except psycopg2.OperationalError as e:
+            delay = min(base_delay * 2 ** attempt, 30.0)
+            log.warning("Attente PostgreSQL (tentative %d/%d) : %s", attempt + 1, retries, e)
+            time.sleep(delay)
+    raise DatabaseConnectionError(f"Impossible de se connecter après {retries} tentatives")
+
+
+class PgDeviceRepository(DeviceRepository):
+    def __init__(self, conn: connection):
+        self._conn = conn
+
+    def get_or_create_device_id(self, dev_eui: str) -> str:
+        try:
+            with self._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,)
+                )
+                return str(cur.fetchone()[0])
+        except psycopg2.DatabaseError as e:
+            raise DatabaseError(f"Erreur de création du device {dev_eui}") from e
+
+
+class PgReadingRepository(ReadingRepository):
+    def __init__(self, conn: connection):
+        self._conn = conn
+
+    def insert_reading(self, device_id: str, pulse_count: int) -> None:
+        try:
+            with self._conn.cursor() as cur:
+                cur.execute(
+                    """
+                    INSERT INTO reading (device_id, date, pulses)
+                    VALUES (%s, NOW(), %s)
+                """,
+                    (device_id, pulse_count),
+                )
+        except psycopg2.DatabaseError as e:
+            raise DatabaseError(f"Erreur d'enregistrement de la télérelève sur le device {device_id}") from e