首个可运行的版本

backend/app/routers/friends.py

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+"""好友路由"""
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.dependencies import get_db, get_current_user
+from app.models.user import User
+from app.schemas.friend import FriendRequestCreate, FriendRead, FriendRequestRead
+from app.services.friend_service import FriendService
+
+router = APIRouter()
+
+
+@router.get("/", response_model=list[dict])
+async def list_friends(
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """获取好友列表"""
+    service = FriendService(db)
+    return await service.get_friends(user.id)
+
+
+@router.get("/requests", response_model=list[dict])
+async def list_requests(
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """获取待处理的好友请求"""
+    service = FriendService(db)
+    return await service.get_pending_requests(user.id)
+
+
+@router.post("/request")
+async def send_friend_request(
+    req: FriendRequestCreate,
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """发送好友请求"""
+    service = FriendService(db)
+    try:
+        await service.send_request(user.id, req.to_user_id, req.message)
+        return {"success": True, "message": "好友请求已发送"}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.put("/request/{request_id}/accept")
+async def accept_friend_request(
+    request_id: str,
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """接受好友请求"""
+    service = FriendService(db)
+    try:
+        await service.accept_request(request_id, user.id)
+        return {"success": True, "message": "已添加好友"}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.put("/request/{request_id}/reject")
+async def reject_friend_request(
+    request_id: str,
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """拒绝好友请求"""
+    service = FriendService(db)
+    try:
+        await service.reject_request(request_id, user.id)
+        return {"success": True, "message": "已拒绝"}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.delete("/{friend_id}")
+async def remove_friend(
+    friend_id: str,
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    """删除好友"""
+    service = FriendService(db)
+    await service.remove_friend(user.id, friend_id)
+    return {"success": True, "message": "已删除好友"}