src/main/java/com/example/g8backend/controller/UserController.java

package com.example.g8backend.controller;

import com.example.g8backend.entity.User;
import com.example.g8backend.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private IUserService userService;

    // 获取已登录的用户信息
    @GetMapping
    public ResponseEntity<?> getUserInfo(){
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        long userId = (long) authentication.getPrincipal();
        User user = userService.getById(userId);
        user.setPassword(null);
        return ResponseEntity.ok(user);
    }
    @PostMapping("/follow/{userId}")
    public ResponseEntity<?> followUser(@PathVariable Long userId) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        Long followerId = (Long) auth.getPrincipal(); // 确保Security返回Long
        return ResponseEntity.ok(userService.followUser(followerId, userId));
    }

    @PostMapping("/message/{receiverId}")
    public ResponseEntity<?> sendMessage(
            @PathVariable Long receiverId,
            @RequestBody String content
    ) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        Long senderId = (Long) auth.getPrincipal();
        Long messageId = userService.sendMessage(senderId, receiverId, content);
        return ResponseEntity.ok(Map.of("messageId", messageId));
    }
}