backend/src/main/java/com/yundage/chat/controller/UserController.java

package com.yundage.chat.controller;

import com.yundage.chat.entity.User;
import com.yundage.chat.mapper.UserMapper;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import io.swagger.v3.oas.annotations.security.SecurityRequirement;
import io.swagger.v3.oas.annotations.tags.Tag;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/api/users")
@Tag(name = "用户管理", description = "用户CRUD操作接口")
@SecurityRequirement(name = "Bearer Authentication")
public class UserController {
    
    @Autowired
    private UserMapper userMapper;
    
    @GetMapping
    @Operation(summary = "获取所有用户", description = "获取系统中所有用户列表")
    @ApiResponse(responseCode = "200", description = "成功获取用户列表")
    public List<User> getAllUsers() {
        return userMapper.selectAll();
    }
    
    @GetMapping("/{id}")
    @Operation(summary = "根据ID获取用户", description = "根据用户ID获取用户信息")
    @ApiResponses(value = {
            @ApiResponse(responseCode = "200", description = "成功获取用户信息"),
            @ApiResponse(responseCode = "404", description = "用户不存在")
    })
    public User getUserById(@Parameter(description = "用户ID") @PathVariable Long id) {
        return userMapper.selectOneById(id);
    }
    
    @PostMapping
    @Operation(summary = "创建用户", description = "创建新的用户")
    @ApiResponses(value = {
            @ApiResponse(responseCode = "200", description = "用户创建成功"),
            @ApiResponse(responseCode = "400", description = "请求参数错误")
    })
    public User createUser(@RequestBody User user) {
        user.setCreatedAt(LocalDateTime.now());
        user.setUpdatedAt(LocalDateTime.now());
        userMapper.insert(user);
        return user;
    }
    
    @PutMapping("/{id}")
    @Operation(summary = "更新用户", description = "更新指定用户的信息")
    @ApiResponses(value = {
            @ApiResponse(responseCode = "200", description = "用户更新成功"),
            @ApiResponse(responseCode = "404", description = "用户不存在"),
            @ApiResponse(responseCode = "400", description = "请求参数错误")
    })
    public User updateUser(@Parameter(description = "用户ID") @PathVariable Long id, @RequestBody User user) {
        user.setId(id);
        user.setUpdatedAt(LocalDateTime.now());
        userMapper.update(user);
        return user;
    }
    
    @DeleteMapping("/{id}")
    @Operation(summary = "删除用户", description = "根据ID删除用户")
    @ApiResponses(value = {
            @ApiResponse(responseCode = "200", description = "用户删除成功"),
            @ApiResponse(responseCode = "404", description = "用户不存在")
    })
    public void deleteUser(@Parameter(description = "用户ID") @PathVariable Long id) {
        userMapper.deleteById(id);
    }
}