refactor(services): split services into separate folders and update namespaces

2026-09-05 07:36:53 +08:00 · 2025-05-22 21:18:02 +08:00
parent 9243a26189
commit fba716ba28
33 changed files with 96 additions and 107 deletions
@@ -0,0 +1,289 @@
+using System.Security.Claims;
+using Foxel.Models;
+using Foxel.Models.DataBase;
+using Foxel.Models.Response.Album;
+using Microsoft.EntityFrameworkCore;
+
+namespace Foxel.Services.Media;
+
+public class AlbumService(
+    IDbContextFactory<MyDbContext> contextFactory,
+    IHttpContextAccessor httpContextAccessor)
+    : IAlbumService
+{
+    public async Task<PaginatedResult<AlbumResponse>> GetAlbumsAsync(int page = 1, int pageSize = 10, int? userId = null)
+    {
+        if (page < 1) page = 1;
+        if (pageSize < 1) pageSize = 10;
+        
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        // 构建查询
+        IQueryable<Album> query = dbContext.Albums
+            .Include(a => a.User)
+            .OrderByDescending(a => a.CreatedAt);
+        
+        // 如果指定了用户ID，则只获取该用户的相册
+        if (userId.HasValue)
+        {
+            query = query.Where(a => a.UserId == userId.Value);
+        }
+        
+        // 获取总数和分页数据
+        var totalCount = await query.CountAsync();
+        var albums = await query
+            .Skip((page - 1) * pageSize)
+            .Take(pageSize)
+            .ToListAsync();
+        
+        // 获取每个相册中的图片数量
+        var albumIds = albums.Select(a => a.Id).ToList();
+        var albumPictureCounts = await dbContext.Pictures
+            .Where(p => p.AlbumId != null && albumIds.Contains(p.AlbumId.Value))
+            .GroupBy(p => p.AlbumId)
+            .Select(g => new { AlbumId = g.Key, Count = g.Count() })
+            .ToDictionaryAsync(x => x.AlbumId!.Value, x => x.Count);
+        
+        // 转换为响应模型
+        var albumResponses = albums.Select(a => new AlbumResponse
+        {
+            Id = a.Id,
+            Name = a.Name,
+            Description = a.Description,
+            PictureCount = albumPictureCounts.GetValueOrDefault(a.Id, 0),
+            UserId = a.UserId,
+            Username = a.User.UserName,
+            CreatedAt = a.CreatedAt,
+            UpdatedAt = a.UpdatedAt
+        }).ToList();
+        
+        return new PaginatedResult<AlbumResponse>
+        {
+            Data = albumResponses,
+            Page = page,
+            PageSize = pageSize,
+            TotalCount = totalCount
+        };
+    }
+    
+    public async Task<AlbumResponse> GetAlbumByIdAsync(int id)
+    {
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        var album = await dbContext.Albums
+            .Include(a => a.User)
+            .FirstOrDefaultAsync(a => a.Id == id);
+        
+        if (album == null)
+            throw new KeyNotFoundException($"找不到ID为{id}的相册");
+        
+        // 获取相册中图片的数量
+        var pictureCount = await dbContext.Pictures
+            .Where(p => p.AlbumId == id)
+            .CountAsync();
+            
+        // 转换为响应模型
+        var response = new AlbumResponse
+        {
+            Id = album.Id,
+            Name = album.Name,
+            Description = album.Description,
+            PictureCount = pictureCount,
+            UserId = album.UserId,
+            Username = album.User.UserName,
+            CreatedAt = album.CreatedAt,
+            UpdatedAt = album.UpdatedAt
+        };
+        
+        return response;
+    }
+    
+    public async Task<AlbumResponse> CreateAlbumAsync(string name, string? description, int userId)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+            throw new ArgumentException("相册名称不能为空", nameof(name));
+            
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        // 检查用户是否存在
+        var user = await dbContext.Users.FindAsync(userId);
+        if (user == null)
+            throw new KeyNotFoundException($"找不到ID为{userId}的用户");
+            
+        // 创建新相册
+        var album = new Album
+        {
+            Name = name.Trim(),
+            Description = description?.Trim() ?? string.Empty,
+            UserId = userId,
+            User = user,
+            CreatedAt = DateTime.UtcNow,
+            UpdatedAt = DateTime.UtcNow
+        };
+        
+        dbContext.Albums.Add(album);
+        await dbContext.SaveChangesAsync();
+        
+        // 转换为响应模型
+        return new AlbumResponse
+        {
+            Id = album.Id,
+            Name = album.Name,
+            Description = album.Description,
+            PictureCount = 0,
+            UserId = album.UserId,
+            Username = user.UserName,
+            CreatedAt = album.CreatedAt,
+            UpdatedAt = album.UpdatedAt
+        };
+    }
+    
+    public async Task<AlbumResponse> UpdateAlbumAsync(int id, string name, string? description, int? userId = null)
+    {
+        if (string.IsNullOrWhiteSpace(name))
+            throw new ArgumentException("相册名称不能为空", nameof(name));
+            
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        // 获取相册
+        var album = await dbContext.Albums
+            .Include(a => a.User)
+            .Include(a => a.Pictures)
+            .FirstOrDefaultAsync(a => a.Id == id);
+            
+        if (album == null)
+            throw new KeyNotFoundException($"找不到ID为{id}的相册");
+            
+        // 权限检查 - 只有相册的创建者或系统管理员可以更新
+        if (userId.HasValue && album.UserId != userId.Value)
+        {
+            // 检查用户是否是管理员
+            var user = await dbContext.Users.FindAsync(userId.Value);
+            if (user == null)
+            {
+                throw new UnauthorizedAccessException("您没有权限更新此相册");
+            }
+        }
+        
+        // 更新相册信息
+        album.Name = name.Trim();
+        album.Description = description?.Trim() ?? album.Description;
+        album.UpdatedAt = DateTime.UtcNow;
+        
+        await dbContext.SaveChangesAsync();
+        
+        // 转换为响应模型
+        return new AlbumResponse
+        {
+            Id = album.Id,
+            Name = album.Name,
+            Description = album.Description,
+            PictureCount = album.Pictures?.Count ?? 0,
+            UserId = album.UserId,
+            Username = album.User.UserName,
+            CreatedAt = album.CreatedAt,
+            UpdatedAt = album.UpdatedAt
+        };
+    }
+    
+    public async Task<bool> DeleteAlbumAsync(int id)
+    {
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        var album = await dbContext.Albums.FindAsync(id);
+        if (album == null)
+            return false;
+            
+        // 注意：相册删除前，需要确保关联的图片被正确处理
+        // 这里只移除相册，而不删除图片
+        
+        dbContext.Albums.Remove(album);
+        await dbContext.SaveChangesAsync();
+        
+        return true;
+    }
+    
+    public async Task<bool> AddPictureToAlbumAsync(int albumId, int pictureId)
+    {
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        // 获取相册和图片
+        var album = await dbContext.Albums.FindAsync(albumId);
+        if (album == null)
+            throw new KeyNotFoundException($"找不到ID为{albumId}的相册");
+            
+        var picture = await dbContext.Pictures.FindAsync(pictureId);
+        if (picture == null)
+            throw new KeyNotFoundException($"找不到ID为{pictureId}的图片");
+            
+        // 将图片添加到相册
+        picture.AlbumId = albumId;
+        picture.Album = album;
+        
+        await dbContext.SaveChangesAsync();
+        
+        return true;
+    }
+    
+    public async Task<bool> RemovePictureFromAlbumAsync(int albumId, int pictureId)
+    {
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        // 获取图片
+        var picture = await dbContext.Pictures
+            .FirstOrDefaultAsync(p => p.Id == pictureId && p.AlbumId == albumId);
+            
+        if (picture == null)
+            throw new KeyNotFoundException($"在相册中找不到ID为{pictureId}的图片");
+            
+        // 从相册中移除图片
+        picture.AlbumId = null;
+        picture.Album = null;
+        
+        await dbContext.SaveChangesAsync();
+        
+        return true;
+    }
+
+    public async Task<bool> AddPicturesToAlbumAsync(int albumId, List<int> pictureIds)
+    {
+        await using var dbContext = await contextFactory.CreateDbContextAsync();
+        
+        var album = await dbContext.Albums.FindAsync(albumId) 
+            ?? throw new KeyNotFoundException("相册不存在");
+        
+        // 检查是否有权限修改此相册
+        var currentUser = httpContextAccessor.HttpContext?.User;
+        if (currentUser != null)
+        {
+            var userId = int.Parse(currentUser.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? "0");
+            if (album.UserId != userId)
+            {
+                throw new UnauthorizedAccessException("您没有权限修改此相册");
+            }
+        }
+        
+        var successCount = 0;
+        
+        foreach (var pictureId in pictureIds)
+        {
+            var picture = await dbContext.Pictures.FindAsync(pictureId);
+            if (picture == null) continue; // 跳过不存在的图片
+            
+            // 直接更新 Picture 的 AlbumId
+            if (picture.AlbumId != albumId)
+            {
+                picture.AlbumId = albumId;
+                successCount++;
+            }
+        }
+        
+        if (successCount > 0)
+        {
+            await dbContext.SaveChangesAsync();
+            return true;
+        }
+        
+        return false;
+    }
+}