feat: added promocode activation

also code reformatting and bug fixes

solution/api/v1/business/schemas.py

@@ -70,7 +70,9 @@ class CreatePromocodeOut(Schema):
 
 
 class PromocodeListFilters(Schema):
-    limit: int = Field(10, gt=0, description="Limit must be greater than 0")
+    limit: int = Field(
+        10, ge=0, description="Limit must be greater than or equal 0"
+    )
     offset: int = Field(
         0, ge=0, description="Offset must be greater than or equal to 0"
     )

solution/api/v1/business/views.py

@@ -172,8 +172,8 @@ def list_promocode(
         promocodes = promocodes.order_by("-created_at")
 
     promocodes = promocodes.prefetch_related("activations", "likes").annotate(
-        used_count=Count("activations"),
-        like_count=Count("likes"),
+        used_count=Count("activations", distinct=True),
+        like_count=Count("likes", distinct=True),
     )
 
     promocodes = promocodes[filters.offset : filters.offset + filters.limit]
@@ -213,8 +213,8 @@ def get_promocode(
         promocodes.select_related("target")
         .prefetch_related("activations", "likes")
         .annotate(
-            used_count=Count("activations"),
-            like_count=Count("likes"),
+            used_count=Count("activations", distinct=True),
+            like_count=Count("likes", distinct=True),
         )
     )
 
@@ -255,8 +255,8 @@ def patch_promocode(
         promocodes.select_related("target")
         .prefetch_related("activations", "likes")
         .annotate(
-            used_count=Count("activations"),
-            like_count=Count("likes"),
+            used_count=Count("activations", distinct=True),
+            like_count=Count("likes", distinct=True),
         )
     )
 

solution/api/v1/user/schemas.py

@@ -71,7 +71,9 @@ class PatchUserIn(Schema):
 
 
 class PromocodeFeedFilters(Schema):
-    limit: int = Field(10, gt=0, description="Limit must be greater than 0")
+    limit: int = Field(
+        10, ge=0, description="Limit must be greater than or equal 0"
+    )
     offset: int = Field(
         0, ge=0, description="Offset must be greater than or equal to 0"
     )
@@ -101,7 +103,9 @@ class PromocodeRemoveLikeOut(Schema):
 
 
 class PromocodeCommentsFilters(Schema):
-    limit: int = Field(10, gt=0, description="Limit must be greater than 0")
+    limit: int = Field(
+        10, ge=0, description="Limit must be greater than or equal 0"
+    )
     offset: int = Field(
         0, ge=0, description="Offset must be greater than or equal to 0"
     )
@@ -110,9 +114,7 @@ class PromocodeCommentsFilters(Schema):
 class CommentIn(ModelSchema):
     class Meta:
         model = PromocodeComment
-        fields: ClassVar[list[str]] = [
-            PromocodeComment.text.field.name
-        ]
+        fields: ClassVar[list[str]] = [PromocodeComment.text.field.name]
 
 
 class CommentAuthor(Schema):
@@ -130,3 +132,7 @@ class CommentOut(Schema):
 
 class CommentDeletedOut(Schema):
     status: str = "ok"
+
+
+class PromocodeActivateOut(Schema):
+    promo: str

solution/api/v1/user/utils.py

@@ -39,6 +39,6 @@ def map_comment_to_schema(comment: PromocodeComment) -> schemas.CommentOut:
         author=schemas.CommentAuthor(
             name=comment.author.name,
             surname=comment.author.surname,
-            avatar_url=comment.author.avatar_url
-        )
+            avatar_url=comment.author.avatar_url,
+        ),
     )

solution/api/v1/user/views.py

@@ -17,6 +17,7 @@ from apps.promo.models import (
 )
 from apps.user.models import User
 from config.errors import UniqueConstraintError
+from config.integrations.antifraud.interactor import AntifraudServiceInteractor
 
 router = Router(tags=["user"])
 
@@ -146,8 +147,8 @@ def feed(
     )
 
     promocodes = promocodes.prefetch_related("likes", "comments").annotate(
-        like_count=Count("likes"),
-        comment_count=Count("comments"),
+        like_count=Count("likes", distinct=True),
+        comment_count=Count("comments", distinct=True),
         is_liked_by_user=Exists(
             PromocodeLike.objects.filter(promocode=OuterRef("pk"), user=user)
         ),
@@ -203,8 +204,8 @@ def get_promocode(
         promocodes.select_related("business")
         .prefetch_related("likes", "comments")
         .annotate(
-            like_count=Count("likes"),
-            comment_count=Count("comments"),
+            like_count=Count("likes", distinct=True),
+            comment_count=Count("comments", distinct=True),
             is_liked_by_user=Exists(
                 PromocodeLike.objects.filter(
                     promocode=OuterRef("pk"), user=user
@@ -234,7 +235,7 @@ def get_promocode(
 )
 def add_like(
     request: HttpRequest, promocode_id: str
-) -> tuple[status.OK, schemas.PromocodeViewOut]:
+) -> tuple[status.OK, schemas.PromocodeLikeOut]:
     user: User = request.auth
 
     promocodes = Promocode.objects.filter(id=promocode_id)
@@ -259,7 +260,7 @@ def add_like(
 )
 def delete_like(
     request: HttpRequest, promocode_id: str
-) -> tuple[status.OK, schemas.PromocodeViewOut]:
+) -> tuple[status.OK, schemas.PromocodeRemoveLikeOut]:
     user: User = request.auth
 
     promocodes = Promocode.objects.filter(id=promocode_id)
@@ -272,7 +273,7 @@ def delete_like(
             promocode=promocodes.first(), user=user
         ).delete()
 
-    return status.OK, schemas.PromocodeLikeOut()
+    return status.OK, schemas.PromocodeRemoveLikeOut()
 
 
 @router.post(
@@ -315,8 +316,8 @@ def list_comments(
     request: HttpRequest,
     filters: Query[schemas.PromocodeCommentsFilters],
     promocode_id: str,
-    response: HttpResponse
-) -> tuple[int, schemas.CommentOut]:
+    response: HttpResponse,
+) -> tuple[int, list[schemas.CommentOut]]:
     promocodes = Promocode.objects.filter(id=promocode_id)
 
     if not promocodes.exists():
@@ -412,7 +413,7 @@ def delete_comment(
     request: HttpRequest,
     promocode_id: str,
     comment_id: str,
-) -> tuple[int, schemas.CommentOut]:
+) -> tuple[int, schemas.CommentDeletedOut]:
     user: User = request.auth
 
     commnets = PromocodeComment.objects.filter(
@@ -432,3 +433,53 @@ def delete_comment(
     comment_obj.delete()
 
     return status.OK, schemas.CommentDeletedOut()
+
+
+@router.post(
+    "/promo/{promocode_id}/activate",
+    auth=UserAuth(),
+    response={
+        status.OK: schemas.PromocodeActivateOut,
+        status.BAD_REQUEST: global_schemas.BadRequestError,
+        status.NOT_FOUND: global_schemas.NotFoundError,
+    },
+)
+def activate_promocode(
+    request: HttpRequest,
+    promocode_id: str,
+) -> tuple[int, schemas.PromocodeActivateOut]:
+    user: User = request.auth
+
+    promocodes = Promocode.objects.filter(id=promocode_id)
+
+    if not promocodes.exists():
+        raise HttpError(status.NOT_FOUND, status.NOT_FOUND.phrase)
+
+    promocodes = promocodes.select_related("target").filter(
+        Q(
+            Q(target__age_from__isnull=True)
+            | Q(target__age_from__lte=user.age),
+            Q(target__age_until__isnull=True)
+            | Q(target__age_until__gte=user.age),
+            Q(target__country__isnull=True) | Q(target__country=user.country),
+        )
+    )
+
+    if not promocodes.exists():
+        raise HttpError(status.FORBIDDEN, status.FORBIDDEN.phrase)
+
+    promocode = promocodes.first()
+
+    if not promocode.active:
+        raise HttpError(status.FORBIDDEN, status.FORBIDDEN.phrase)
+
+    antifraud_result = AntifraudServiceInteractor().validate(
+        user_email=user.email, promo_id=str(promocode.id)
+    )
+
+    if not antifraud_result["ok"]:
+        raise HttpError(status.FORBIDDEN, status.FORBIDDEN.phrase)
+
+    promo = promocode.activate_promocode(user)
+
+    return status.OK, schemas.PromocodeActivateOut(promo=promo)

solution/apps/promo/models.py

@@ -144,6 +144,23 @@ class Promocode(BaseModel):
 
         PromocodeDurationValidator()(self)
 
+    def activate_promocode(self, user: User) -> str:
+        promocode: str | None = None
+
+        if self.mode == self.ModeChoices.COMMON:
+            promocode = self.promo_common
+        elif self.mode == self.ModeChoices.UNIQUE:
+            unused_promocodes = self.promo_unique[
+                len(self.promo_unique_activated) : :
+            ]
+            promocode = unused_promocodes[0]
+            self.promo_unique_activated.append(promocode)
+            self.save()
+
+        PromocodeActivation.objects.create(promocode=self, user=user)
+
+        return promocode
+
     @property
     def active(self) -> bool:
         current_date = timezone.datetime.today().date()
@@ -210,5 +227,8 @@ class PromocodeLike(BaseModel):
         User, on_delete=models.CASCADE, related_name="liked_promocodes"
     )
 
+    def __str__(self) -> str:
+        return f"{self.promocode.id} | {self.user.id}"
+
     class Meta:
         unique_together = ("promocode", "user")

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')}"
 )
 

solution/pyproject.toml

@@ -21,6 +21,7 @@ dependencies = [
  "pydantic[email]>=2.10.5",
  "pyjwt>=2.10.1",
  "python-json-logger>=3.2.1",
+ "pytz>=2024.2",
  "redis>=5.2.1",
 ]