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

TechHelper.Server/Services/School/SchoolService.cs

@@ -0,0 +1,179 @@
+using AutoMapper;
+using Entities.Contracts;
+using Entities.DTO;
+using Microsoft.EntityFrameworkCore;
+using SharedDATA.Api;
+
+namespace TechHelper.Services.Beta
+{
+    public class SchoolService : ISchoolService
+    {
+        private readonly IUnitOfWork _work;
+        private readonly IMapper _mapper;
+
+        public SchoolService(IUnitOfWork work, IMapper mapper)
+        {
+            _work = work;
+            _mapper = mapper;
+        }
+
+        public async Task<ApiResponse> GetAllAsync(QueryParameter query)
+        {
+            try
+            {
+                var repository = _work.GetRepository<School>();
+
+                if (query.Search != null && !string.IsNullOrWhiteSpace(query.Search))
+                {
+                    var schools = await repository.GetPagedListAsync(
+                        predicate: s => s.SchoolName.Contains(query.Search),
+                        pageSize: query.PageSize,
+                        pageIndex: query.PageIndex
+                    );
+                    var schoolDtosFiltered = _mapper.Map<IEnumerable<SchoolDto>>(schools.Items);
+                    return new ApiResponse(true, schoolDtosFiltered);
+                }
+                else
+                {
+                    var schools = await repository.GetPagedListAsync(
+                        pageSize: query.PageSize,
+                        pageIndex: query.PageIndex
+                    );
+                    var schoolDtos = _mapper.Map<IEnumerable<SchoolDto>>(schools.Items);
+                    return new ApiResponse(true, schoolDtos);
+                }
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"获取所有学校时发生错误: {ex.Message}");
+            }
+        }
+
+        public async Task<ApiResponse> GetAsync(Guid id)
+        {
+            try
+            {
+                var school = await _work.GetRepository<School>().GetFirstOrDefaultAsync(
+                    predicate: s => s.Id == id,
+					include: i
+					=> i.Include(s => s.Grades));
+
+                if (school == null)
+                {
+                    return new ApiResponse("学校未找到。");
+                }
+
+                var schoolDto = _mapper.Map<SchoolResponseDto>(school);
+                return new ApiResponse(true, schoolDto);
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"获取学校时发生错误: {ex.Message}");
+            }
+        }
+
+        public async Task<ApiResponse> GetSchoolByNameAsync(string schoolName)
+        {
+            try
+            {
+                var school = await _work.GetRepository<School>().GetFirstOrDefaultAsync(
+                    predicate: s => s.SchoolName == schoolName,
+                    include: i
+                    =>i.Include(s => s.Grades));
+
+                if (school == null)
+                {
+                    return new ApiResponse("学校未找到。");
+                }
+
+                var schoolDto = _mapper.Map<SchoolResponseDto>(school);
+                return new ApiResponse(true, schoolDto);
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"根据名称获取学校时发生错误: {ex.Message}");
+            }
+        }
+
+        public async Task<ApiResponse> AddAsync(SchoolDto model)
+        {
+            try
+            {
+                // 检查是否已存在同名学校
+                var existingSchool = await _work.GetRepository<School>().GetFirstOrDefaultAsync(
+                    predicate: s => s.SchoolName == model.SchoolName);
+
+                if (existingSchool != null)
+                {
+                    return new ApiResponse($"学校 '{model.SchoolName}' 已存在。");
+                }
+
+                var school = _mapper.Map<School>(model);
+                await _work.GetRepository<School>().InsertAsync(school);
+
+                if (await _work.SaveChangesAsync() > 0)
+                {
+                    return new ApiResponse(true, _mapper.Map<SchoolDto>(school));
+                }
+                return new ApiResponse("添加学校失败。");
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"添加学校时发生错误: {ex.Message}");
+            }
+        }
+
+        public async Task<ApiResponse> UpdateAsync(SchoolDto model)
+        {
+            try
+            {
+                var existingSchool = await _work.GetRepository<School>().GetFirstOrDefaultAsync(
+                    predicate: s => s.Id == model.Id);
+
+                if (existingSchool == null)
+                {
+                    return new ApiResponse("学校未找到。");
+                }
+
+                _mapper.Map(model, existingSchool);
+                _work.GetRepository<School>().Update(existingSchool);
+
+                if (await _work.SaveChangesAsync() > 0)
+                {
+                    return new ApiResponse(true, _mapper.Map<SchoolDto>(existingSchool));
+                }
+                return new ApiResponse("更新学校失败。");
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"更新学校时发生错误: {ex.Message}");
+            }
+        }
+
+        public async Task<ApiResponse> DeleteAsync(Guid id)
+        {
+            try
+            {
+                var existingSchool = await _work.GetRepository<School>().GetFirstOrDefaultAsync(
+                    predicate: s => s.Id == id);
+
+                if (existingSchool == null)
+                {
+                    return new ApiResponse("学校未找到。");
+                }
+
+                _work.GetRepository<School>().Delete(existingSchool);
+
+                if (await _work.SaveChangesAsync() > 0)
+                {
+                    return new ApiResponse(true, "学校删除成功。");
+                }
+                return new ApiResponse("删除学校失败。");
+            }
+            catch (Exception ex)
+            {
+                return new ApiResponse($"删除学校时发生错误: {ex.Message}");
+            }
+        }
+    }
+}