重构项目结构，移除Assignment相关功能，优化Submission模块

TechHelper.Server/Controllers/QuestionController.cs

@@ -0,0 +1,188 @@
+using Entities.Contracts;
+using Entities.DTO;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using TechHelper.Services;
+using TechHelper.Services.Beta;
+
+namespace TechHelper.Server.Controllers
+{
+    /// <summary>
+    /// 题目管理控制器
+    /// 处理题目相关的操作，如CRUD、按标题查找等
+    /// </summary>
+    [Route("api/question")]
+    [ApiController]
+    public class QuestionController : ControllerBase
+    {
+        private readonly IQuestionService _questionService;
+        private readonly UserManager<User> _userManager;
+
+        /// <summary>
+        /// 初始化题目控制器
+        /// </summary>
+        /// <param name="questionService">题目服务</param>
+        /// <param name="userManager">用户管理服务</param>
+        public QuestionController(IQuestionService questionService, UserManager<User> userManager)
+        {
+            _questionService = questionService;
+            _userManager = userManager;
+        }
+
+        #region 题目基本信息CRUD操作
+
+        /// <summary>
+        /// 获取题目列表（支持搜索和分页）
+        /// </summary>
+        /// <param name="query">查询参数</param>
+        /// <returns>题目列表</returns>
+        /// <response code="200">成功获取题目列表</response>
+        /// <response code="400">获取失败</response>
+        [HttpGet]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> GetAll([FromQuery] QueryParameter query)
+        {
+            var result = await _questionService.GetAllAsync(query);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        /// <summary>
+        /// 根据ID获取题目详细信息
+        /// </summary>
+        /// <param name="id">题目ID</param>
+        /// <returns>题目详细信息</returns>
+        /// <response code="200">成功获取题目信息</response>
+        /// <response code="400">题目未找到或获取失败</response>
+        [HttpGet("{id}")]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> GetById(Guid id)
+        {
+            var result = await _questionService.GetAsync(id);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        /// <summary>
+        /// 创建新题目
+        /// </summary>
+        /// <param name="model">题目数据传输对象</param>
+        /// <returns>创建结果</returns>
+        /// <response code="200">创建成功</response>
+        /// <response code="400">创建失败</response>
+        [HttpPost]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> Create([FromBody] QuestionDto model)
+        {
+            var result = await _questionService.AddAsync(model);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        /// <summary>
+        /// 更新题目信息
+        /// </summary>
+        /// <param name="model">题目数据传输对象</param>
+        /// <returns>更新结果</returns>
+        /// <response code="200">更新成功</response>
+        /// <response code="400">更新失败</response>
+        [HttpPut]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> Update([FromBody] QuestionDto model)
+        {
+            var result = await _questionService.UpdateAsync(model);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        /// <summary>
+        /// 删除题目（软删除）
+        /// </summary>
+        /// <param name="id">题目ID</param>
+        /// <returns>删除结果</returns>
+        /// <response code="200">删除成功</response>
+        /// <response code="400">删除失败</response>
+        [HttpDelete("{id}")]
+        [Authorize(Roles = "Admin")]
+        public async Task<IActionResult> Delete(Guid id)
+        {
+            var result = await _questionService.DeleteAsync(id);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Message);
+        }
+
+        #endregion
+
+        #region 题目业务逻辑操作
+
+        /// <summary>
+        /// 根据标题查找题目
+        /// </summary>
+        /// <param name="title">题目标题</param>
+        /// <returns>题目信息</returns>
+        /// <response code="200">成功找到题目</response>
+        /// <response code="400">题目未找到或查找失败</response>
+        [HttpGet("by-title/{title}")]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> GetByTitle(string title)
+        {
+            var result = await _questionService.FindByTitle(title);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        /// <summary>
+        /// 批量检查题目标题是否存在
+        /// </summary>
+        /// <param name="titles">题目标题集合</param>
+        /// <returns>标题存在性检查结果</returns>
+        /// <response code="200">检查成功</response>
+        /// <response code="400">检查失败</response>
+        [HttpPost("check-titles")]
+        [Authorize(Roles = "Teacher,Admin")]
+        public async Task<IActionResult> CheckTitlesExistence([FromBody] List<string> titles)
+        {
+            var result = await _questionService.CheckTitlesExistence(titles);
+
+            if (!result.Status)
+            {
+                return BadRequest(result.Message);
+            }
+
+            return Ok(result.Result);
+        }
+
+        #endregion
+    }
+}