feat: get contributors by project (#1062)

Co-authored-by: sujanadh <[email protected]>

src/backend/app/projects/project_crud.py

@@ -2413,4 +2413,52 @@ async def get_dashboard_detail(project_id: int, db: Session):
     project.total_submission = await submission_crud.get_submission_count_of_a_project(db, project_id)
     project.total_tasks = await tasks_crud.get_task_count_in_project(db, project_id)
 
-    return project
+    return project
+
+async def get_project_users(db:Session, project_id:int):
+    """
+    Get the users and their contributions for a project.
+
+    Args:
+        db (Session): The database session.
+        project_id (int): The ID of the project.
+
+    Returns:
+        List[Dict[str, Union[str, int]]]: A list of dictionaries containing the username and the number of contributions made by each user for the specified project.
+    """
+
+    contributors = db.query(db_models.DbTaskHistory).filter(db_models.DbTaskHistory.project_id==project_id).all()
+    unique_user_ids = {user.user_id for user in contributors if user.user_id is not None}
+    response = []
+
+    for user_id in unique_user_ids:
+        contributions = count_user_contributions(db, user_id, project_id)
+        db_user = await user_crud.get_user(db, user_id)
+        response.append({"user":db_user.username, "contributions":contributions})
+
+    response = sorted(response, key=lambda x: x["contributions"], reverse=True)
+    return response
+
+def count_user_contributions(db: Session, user_id: int, project_id: int) -> int:
+    """
+    Count contributions for a specific user.
+
+    Args:
+        db (Session): The database session.
+        user_id (int): The ID of the user.
+        project_id (int): The ID of the project.
+
+    Returns:
+        int: The number of contributions made by the user for the specified project.
+    """
+
+    contributions_count = (
+        db.query(func.count(db_models.DbTaskHistory.user_id))
+        .filter(
+            db_models.DbTaskHistory.user_id == user_id,
+            db_models.DbTaskHistory.project_id == project_id
+        )
+        .scalar()
+    )
+
+    return contributions_count

src/backend/app/projects/project_routes.py

@@ -1233,4 +1233,17 @@ async def project_dashboard(
         ProjectDashboard: The project dashboard details.
     """
 
-    return await project_crud.get_dashboard_detail(project_id, db)
+    return await project_crud.get_dashboard_detail(project_id, db)
+
+@router.get("/contributors/{project_id}")
+async def get_contributors(project_id: int, db: Session = Depends(database.get_db)):
+    """Get contributors of a project.
+
+    Args:
+        project_id (int): ID of project.
+
+    Returns:
+        list[project_schemas.ProjectUser]: List of project users.
+    """
+    project_users = await project_crud.get_project_users(db, project_id)
+    return project_users