feat: added promocode activation

also code reformatting and bug fixes

solution/config/integrations/__init__.py

@@ -1,73 +0,0 @@
-from datetime import datetime
-from http import HTTPStatus as status
-from typing import ClassVar
-
-import httpx
-from django.core.cache import cache
-from django.utils import timezone
-
-
-class AntifraudServiceInteractor:
-    HEADERS: ClassVar[dict[str, str]] = {"Content-Type": "application/json"}
-    CACHE_PREFIX = "antifraud_cache"
-
-    def __init__(self, endpoint: str) -> None:
-        self.antifraud_endpoint = f"{endpoint}/api/validate"
-
-    @classmethod
-    def get_cache_key(cls, user_email: str, promo_id: str) -> None:
-        return f"{cls.CACHE_PREFIX}:{user_email}:{promo_id}"
-
-    @classmethod
-    def is_cache_valid(cls, cache_until: str) -> bool:
-        if cache_until:
-            return (
-                datetime.fromisoformat(cache_until).replace(
-                    tzinfo=timezone.utc,
-                )
-                > timezone.now()
-            )
-        return False
-
-    @classmethod
-    def validate(cls, user_email: str, promo_id: str) -> dict[str, bool | str]:
-        cache_key = cls.get_cache_key(user_email, promo_id)
-        cached_result = cache.get(cache_key)
-
-        if cached_result and cls.is_cache_valid(
-            cached_result.get("cache_until"),
-        ):
-            return cached_result
-
-        payload = {"user_email": user_email, "promo_id": promo_id}
-        try:
-            with httpx.Client(timeout=5) as client:
-                response = client.post(
-                    cls.antifraud_endpoint,
-                    json=payload,
-                    headers=cls.HEADERS,
-                )
-
-                if response.status_code == status.OK:
-                    result = response.json()
-
-                    if "cache_until" in result:
-                        cache.set(cache_key, result)
-
-                    return result
-
-                retry_response = client.post(
-                    cls.antifraud_endpoint,
-                    json=payload,
-                    headers=cls.HEADERS,
-                )
-                if retry_response.status_code == status.OK:
-                    result = retry_response.json()
-                    if "cache_until" in result:
-                        cache.set(cache_key, result)
-                    return result
-
-        except httpx.HTTPError:
-            pass
-
-        return {"ok": False}

solution/config/integrations/antifraud/healthcheck.py

@@ -10,7 +10,7 @@ class AntifraudHealthCheck(BaseHealthCheckBackend):
 
     def check_status(self) -> None:
         try:
-            response = httpx.get(f"{settings.ANTIFRAUD_ENDPOINT}/api/ping")
+            response = httpx.get(f"{settings.ANTIFRAUD_ADDRESS}/api/ping")
             if response.status_code >= status.INTERNAL_SERVER_ERROR:
                 self.add_error("Antifraud service is unaccessible")
         except httpx.HTTPError:

solution/config/integrations/antifraud/interactor.py

@@ -0,0 +1,112 @@
+import time
+from datetime import datetime
+from http import HTTPStatus as status
+from typing import ClassVar
+
+import httpx
+from django.conf import settings
+from django.core.cache import cache
+from django.utils import timezone
+from pytz import timezone as tz
+
+logger = settings.LOGGER
+
+
+class AntifraudServiceInteractor:
+    HEADERS: ClassVar[dict[str, str]] = {"Content-Type": "application/json"}
+    CACHE_PREFIX = "antifraud_cache"
+    ANTIFRAUD_ENDPOINT = f"{settings.ANTIFRAUD_ADDRESS}/api/validate"
+    RETRY_COUNT: ClassVar[int] = 2
+
+    @classmethod
+    def get_cache_key(cls, user_email: str, promo_id: str) -> str:
+        return f"{cls.CACHE_PREFIX}:{user_email}:{promo_id}"
+
+    @classmethod
+    def is_cache_valid(cls, cache_until: str) -> bool:
+        if cache_until:
+            try:
+                cache_expiry = datetime.fromisoformat(cache_until).astimezone(
+                    tz(settings.TIME_ZONE)
+                )
+                return cache_expiry > timezone.now()
+            except ValueError:
+                return False
+        return False
+
+    @staticmethod
+    def _make_request(
+        client: httpx.Client,
+        url: str,
+        payload: dict[str, str],
+        headers: dict[str, str],
+        retries: int,
+    ) -> httpx.Response | None:
+        for attempt in range(1, retries + 1):
+            start_time = time.time()
+            try:
+                response = client.post(url, json=payload, headers=headers)
+                request_time = time.time() - start_time
+                logger.info(
+                    "Attempt %d: Request to %s took %s seconds",
+                    attempt,
+                    url,
+                    request_time,
+                )
+
+                if response.status_code == status.OK:
+                    return response
+
+                logger.warning(
+                    "Attempt %d failed with status %d",
+                    attempt,
+                    response.status_code,
+                )
+            except httpx.HTTPError:
+                logger.exception(
+                    "Attempt %d: HTTP error during request to %s",
+                    attempt,
+                    url,
+                )
+
+        logger.exception("All %d attempts to %s failed", retries, url)
+        return None
+
+    @classmethod
+    def validate(cls, user_email: str, promo_id: str) -> dict[str, bool | str]:
+        cache_key = cls.get_cache_key(user_email, promo_id)
+        cached_result = cache.get(cache_key)
+
+        if cached_result and cls.is_cache_valid(
+            cached_result.get("cache_until")
+        ):
+            return cached_result
+
+        payload = {"user_email": user_email, "promo_id": promo_id}
+        try:
+            logger.info("Trying to validate antifraud")
+            with httpx.Client(timeout=5) as client:
+                response = cls._make_request(
+                    client,
+                    cls.ANTIFRAUD_ENDPOINT,
+                    payload,
+                    cls.HEADERS,
+                    retries=cls.RETRY_COUNT,
+                )
+
+                if response:
+                    logger.info("Antifraud works perfectly")
+                    result = response.json()
+
+                    if "cache_until" in result:
+                        cache.set(cache_key, result)
+
+                    return result
+
+        except Exception as e:
+            logger.exception(
+                "Unexpected error during antifraud validation: %s",
+                e,  # noqa: TRY401
+            )
+
+        return {"ok": False}

solution/config/settings.py

@@ -28,7 +28,7 @@ ALLOWED_HOSTS = env(
 
 # Integrations
 
-ANTIFRAUD_ENDPOINT = (
+ANTIFRAUD_ADDRESS = (
     f"http://{env('ANTIFRAUD_ADDRESS', default='http://localhost:9090')}"
 )