Add initial project

backend/repositories/base.py

@@ -0,0 +1,49 @@
+"""Base repository for common database operations."""
+from typing import Generic, TypeVar, Type, List, Optional
+from sqlalchemy.orm import Session
+
+ModelType = TypeVar("ModelType")
+
+
+class BaseRepository(Generic[ModelType]):
+    """Base repository with common CRUD operations."""
+
+    def __init__(self, model: Type[ModelType], db: Session):
+        """Initialize repository with model and database session."""
+        self.model = model
+        self.db = db
+
+    def get_by_id(self, id: int) -> Optional[ModelType]:
+        """Get a single record by ID."""
+        return self.db.query(self.model).filter(self.model.id == id).first()
+
+    def get_all(self) -> List[ModelType]:
+        """Get all records."""
+        return self.db.query(self.model).all()
+
+    def create(self, **kwargs) -> ModelType:
+        """Create a new record."""
+        db_obj = self.model(**kwargs)
+        self.db.add(db_obj)
+        self.db.commit()
+        self.db.refresh(db_obj)
+        return db_obj
+
+    def update(self, id: int, **kwargs) -> Optional[ModelType]:
+        """Update a record by ID."""
+        db_obj = self.get_by_id(id)
+        if db_obj:
+            for key, value in kwargs.items():
+                setattr(db_obj, key, value)
+            self.db.commit()
+            self.db.refresh(db_obj)
+        return db_obj
+
+    def delete(self, id: int) -> bool:
+        """Delete a record by ID."""
+        db_obj = self.get_by_id(id)
+        if db_obj:
+            self.db.delete(db_obj)
+            self.db.commit()
+            return True
+        return False