Updated Factory to use a singleton-like operation

app.py

@@ -22,10 +22,7 @@
 BACKEND_PROVIDER_CAR_ID = os.getenv('BACKEND_PROVIDER_CAR_ID', 1)
 
 # Backend provider instanciation
-provider_factory = BackendProviderFactory(BACKEND_PROVIDER, BACKEND_PROVIDER_BASE_URL, BACKEND_PROVIDER_CAR_ID)
-provider = provider_factory.get_instance()
-
-provider.refresh_data()
+BackendProviderFactory(BACKEND_PROVIDER, BACKEND_PROVIDER_BASE_URL, BACKEND_PROVIDER_CAR_ID)
 
 app = Flask(__name__)
 app.secret_key = os.getenv('SECRET_KEY')
@@ -168,6 +165,7 @@ def carstate(shortuuid):
         expiry = result[2]
 
         if expiry > time.time():
+            provider = BackendProviderFactory.get_instance()
             provider.refresh_data()
 
             temp_carstate = vars(provider)
@@ -231,6 +229,7 @@ def map_admin():
 
     print(result)
 
+    provider = BackendProviderFactory.get_instance()
     provider.refresh_data()
 
     if 'uuid' in locals():

interfaces/backendfactory.py

@@ -4,6 +4,9 @@
 from interfaces.backendinterface import IBackendProvider
 
 class BackendProviderFactory:
+    # static to have a singleton-like
+    provider: IBackendProvider
+
     def _load_provider(self, name, base_url, car_id):
         if name == "teslalogger":
             return teslalogger.TeslaloggerBackendProvider(base_url, car_id)
@@ -16,7 +19,8 @@ def _load_provider(self, name, base_url, car_id):
     def __init__(self, provider_name, base_url, car_id):
         self.provider_name = provider_name
 
-        self.provider_instance = self._load_provider(provider_name, base_url, car_id)
+        self.provider = self._load_provider(provider_name, base_url, car_id)
 
-    def get_instance(self) -> IBackendProvider:
-        return self.provider_instance
+    @staticmethod
+    def get_instance() -> IBackendProvider:
+        return BackendProviderFactory.provider