feat: initialize aivideo project

backend/app/modules/admins/repository.py

@@ -0,0 +1,50 @@
+from sqlalchemy import func, select
+from sqlalchemy.orm import Session
+
+from app.models.entities import (
+    AdminUser,
+    InviteRelation,
+    RechargeOrder,
+    User,
+    VideoGenerationTask,
+)
+
+
+class AdminsRepository:
+    def __init__(self, db: Session) -> None:
+        self.db = db
+
+    def get_admin_by_username(self, username: str) -> AdminUser | None:
+        return self.db.scalar(select(AdminUser).where(AdminUser.username == username))
+
+    def list_users(self):
+        return self.db.query(User).order_by(User.id.desc())
+
+    def get_user(self, user_id: int) -> User | None:
+        return self.db.scalar(select(User).where(User.id == user_id))
+
+    def count_users(self) -> int:
+        return self.db.query(func.count(User.id)).scalar() or 0
+
+    def count_paid_orders(self) -> int:
+        return (
+            self.db.query(func.count(RechargeOrder.id))
+            .filter(RechargeOrder.status == "paid")
+            .scalar()
+            or 0
+        )
+
+    def count_tasks(self) -> int:
+        return self.db.query(func.count(VideoGenerationTask.id)).scalar() or 0
+
+    def count_success_tasks(self) -> int:
+        return (
+            self.db.query(func.count(VideoGenerationTask.id))
+            .filter(VideoGenerationTask.task_status == "succeeded")
+            .scalar()
+            or 0
+        )
+
+    def invite_relations(self):
+        return self.db.query(InviteRelation).order_by(InviteRelation.id.desc())
+