feat: add route to delete many events-groups by its tag alias

src/modules/event_groups/repository.py

@@ -15,6 +15,7 @@
     ViewEventGroup,
 )
 from src.modules.ownership import OwnershipEnum, setup_ownership_method
+from src.modules.tags.repository import tag_repository
 from src.storages.sql import SQLAlchemyStorage
 from src.storages.sql.models import EventGroup
 
@@ -162,6 +163,17 @@ async def delete_by_alias(self, alias: str) -> None:
             await session.execute(q)
             await session.commit()
 
+    async def delete_by_tag_alias(self, tag_alias: str) -> int:
+        tag = await tag_repository.read_by_alias(tag_alias)
+        if tag is None:
+            return 0
+
+        async with self._create_session() as session:
+            q = delete(EventGroup.tags_association).where(EventGroup.tags_association.c.tag_id == tag.id)
+            deleted = await session.execute(q)
+            await session.commit()
+            return cast(deleted.rowcount, int)
+
     # ^^^^^^^^^^^^^^^^^ CRUD ^^^^^^^^^^^^^^^^^ #
 
     async def setup_ownership(self, group_id: int, user_id: int, role_alias: "OwnershipEnum") -> None:

src/modules/event_groups/routes.py

@@ -138,7 +138,10 @@ async def find_event_group_by_alias(alias: str) -> ViewEventGroup:
         **EventGroupNotFoundException.responses,
     },
 )
-async def delete_event_group_by_alias(alias: str) -> None:
+async def delete_event_group_by_alias(
+    alias: str,
+    _: VERIFY_PARSER_DEPENDENCY,
+) -> None:
     """
     Delete event group by alias
     """
@@ -152,6 +155,27 @@ async def delete_event_group_by_alias(alias: str) -> None:
     await event_group_repository.delete_by_alias(alias)
 
 
+@router.delete(
+    "/by-tag-alias",
+    responses={200: {"description": "Event groups deleted successfully"}},
+)
+async def delete_event_group_by_tag_alias(
+    tag_alias: str,
+    _: VERIFY_PARSER_DEPENDENCY,
+):
+    """
+    Delete event groups by its tag alias
+    """
+
+    tag_alias = unquote(tag_alias)
+    event_group = await event_group_repository.delete_by_tag_alias(tag_alias)
+
+    if event_group is None:
+        raise EventGroupNotFoundException()
+
+    await event_group_repository.delete_by_tag_alias(tag_alias)
+
+
 @router.get(
     "/{event_group_id}",
     responses={

src/modules/tags/repository.py

@@ -82,6 +82,10 @@ async def delete(self, id: int) -> None:
 
     # ^^^^^^^^^^^^^^^^^^^^ CRUD ^^^^^^^^^^^^^^^^^^^^ #
 
+    async def read_by_alias(self, alias: str) -> ViewTag | None:
+        async with self._create_session() as session:
+            return await CRUD.read_by(session, only_first=True, alias=alias)
+
     async def setup_ownership(self, tag_id: int, user_id: int, role_alias: OwnershipEnum) -> None:
         async with self._create_session() as session:
             OwnershipClass = Tag.Ownership