下载内容管理

src/components/DownloadManagementPanel.tsx

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+'use client';
+
+import { Check, Trash2, X } from 'lucide-react';
+import { useEffect, useState } from 'react';
+import { createPortal } from 'react-dom';
+
+import { downloadDB, CompletedTask } from '@/lib/download-db';
+
+import { ConfirmDialog } from './ConfirmDialog';
+
+interface DownloadManagementPanelProps {
+  isOpen: boolean;
+  onClose: () => void;
+}
+
+export function DownloadManagementPanel({ isOpen, onClose }: DownloadManagementPanelProps) {
+  const [completedTasks, setCompletedTasks] = useState<CompletedTask[]>([]);
+  const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [mounted, setMounted] = useState(false);
+  const [showConfirmDialog, setShowConfirmDialog] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  useEffect(() => {
+    if (isOpen) {
+      loadCompletedTasks();
+    }
+  }, [isOpen]);
+
+  const loadCompletedTasks = async () => {
+    try {
+      const tasks = await downloadDB.getCompletedTasks();
+      setCompletedTasks(tasks);
+    } catch (error) {
+      console.error('加载已完成任务失败:', error);
+    }
+  };
+
+  const handleSelectAll = () => {
+    if (selectedIds.size === completedTasks.length) {
+      setSelectedIds(new Set());
+    } else {
+      setSelectedIds(new Set(completedTasks.map(t => t.id)));
+    }
+  };
+
+  const handleToggleSelect = (id: string) => {
+    const newSet = new Set(selectedIds);
+    if (newSet.has(id)) {
+      newSet.delete(id);
+    } else {
+      newSet.add(id);
+    }
+    setSelectedIds(newSet);
+  };
+
+  const handleDelete = async () => {
+    if (selectedIds.size === 0) return;
+
+    setShowConfirmDialog(true);
+  };
+
+  const handleConfirmDelete = async () => {
+    setShowConfirmDialog(false);
+    setIsDeleting(true);
+    try {
+      // 获取要删除的任务
+      const tasksToDelete = completedTasks.filter(t => selectedIds.has(t.id));
+
+      // 删除文件系统中的文件
+      for (const task of tasksToDelete) {
+        if (task.downloadMode === 'filesystem') {
+          try {
+            // 从 IndexedDB 读取目录句柄
+            const dbName = 'MoonTVPlus';
+            const storeName = 'dirHandles';
+
+            const dirHandle = await new Promise<FileSystemDirectoryHandle | undefined>((resolve) => {
+              const request = indexedDB.open(dbName, 2); // 使用版本 2
+
+              request.onsuccess = (event) => {
+                const db = (event.target as IDBOpenDBRequest).result;
+
+                if (!db.objectStoreNames.contains(storeName)) {
+                  db.close();
+                  resolve(undefined);
+                  return;
+                }
+
+                const transaction = db.transaction([storeName], 'readonly');
+                const store = transaction.objectStore(storeName);
+                const getRequest = store.get('downloadDir');
+
+                getRequest.onsuccess = () => {
+                  const handle = getRequest.result as FileSystemDirectoryHandle | undefined;
+                  db.close();
+                  resolve(handle);
+                };
+
+                getRequest.onerror = () => {
+                  db.close();
+                  resolve(undefined);
+                };
+              };
+
+              request.onerror = () => {
+                resolve(undefined);
+              };
+            });
+
+            if (dirHandle) {
+              // 请求写权限
+              const permission = await (dirHandle as any).requestPermission({ mode: 'readwrite' });
+              if (permission !== 'granted') {
+                console.error('未获得写权限，无法删除文件');
+                continue;
+              }
+
+              // 删除目录
+              try {
+                const sourceDirHandle = await dirHandle.getDirectoryHandle(task.source, { create: false });
+                const videoIdDirHandle = await sourceDirHandle.getDirectoryHandle(task.videoId, { create: false });
+                await videoIdDirHandle.removeEntry(`ep${task.episodeIndex + 1}`, { recursive: true });
+                console.log('已删除文件:', task.source, task.videoId, `ep${task.episodeIndex + 1}`);
+              } catch (deleteError) {
+                console.error('删除目录失败:', deleteError);
+                // 如果目录不存在，也算成功
+                if ((deleteError as Error).name !== 'NotFoundError') {
+                  throw deleteError;
+                }
+              }
+            }
+          } catch (error) {
+            console.error('删除文件失败:', task.title, error);
+          }
+        }
+      }
+
+      // 从数据库删除记录
+      await downloadDB.deleteCompletedTasks(Array.from(selectedIds));
+      await loadCompletedTasks();
+      setSelectedIds(new Set());
+    } catch (error) {
+      console.error('删除任务失败:', error);
+      alert('删除失败，请重试');
+    } finally {
+      setIsDeleting(false);
+    }
+  };
+
+  const formatDate = (timestamp: number) => {
+    const date = new Date(timestamp);
+    return date.toLocaleString('zh-CN', {
+      year: 'numeric',
+      month: '2-digit',
+      day: '2-digit',
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+  };
+
+  const formatFileSize = (bytes?: number) => {
+    if (!bytes) return '未知';
+    if (bytes < 1024) return bytes + ' B';
+    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(2) + ' KB';
+    if (bytes < 1024 * 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(2) + ' MB';
+    return (bytes / (1024 * 1024 * 1024)).toFixed(2) + ' GB';
+  };
+
+  if (!mounted || !isOpen) return null;
+
+  return (
+    <>
+      {createPortal(
+    <div className='fixed inset-0 z-[9999] flex items-center justify-center p-4'>
+      <div
+        className='absolute inset-0 bg-black/50'
+        onClick={onClose}
+      />
+      <div className='relative w-full max-w-4xl max-h-[90vh] bg-white dark:bg-gray-900 rounded-lg shadow-xl flex flex-col'>
+        {/* Header */}
+        <div className='flex items-center justify-between p-4 border-b border-gray-200 dark:border-gray-700'>
+          <h2 className='text-xl font-semibold text-gray-800 dark:text-gray-200'>
+            下载文件管理
+          </h2>
+          <button
+            onClick={onClose}
+            className='p-1 hover:bg-gray-100 dark:hover:bg-gray-800 rounded transition-colors'
+          >
+            <X className='w-5 h-5 text-gray-600 dark:text-gray-400' />
+          </button>
+        </div>
+
+        {/* Toolbar */}
+        <div className='flex items-center justify-between p-4 border-b border-gray-200 dark:border-gray-700'>
+          <div className='flex items-center gap-4'>
+            <label className='flex items-center gap-2 cursor-pointer'>
+              <input
+                type='checkbox'
+                checked={selectedIds.size === completedTasks.length && completedTasks.length > 0}
+                onChange={handleSelectAll}
+                className='w-4 h-4'
+              />
+              <span className='text-sm text-gray-700 dark:text-gray-300'>
+                全选
+              </span>
+            </label>
+            <span className='text-sm text-gray-500 dark:text-gray-400'>
+              已选择 {selectedIds.size} / {completedTasks.length}
+            </span>
+          </div>
+          <button
+            onClick={handleDelete}
+            disabled={selectedIds.size === 0 || isDeleting}
+            className='px-4 py-2 text-sm bg-red-500 text-white rounded hover:bg-red-600 transition-colors disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2'
+          >
+            <Trash2 className='w-4 h-4' />
+            {isDeleting ? '删除中...' : '删除选中'}
+          </button>
+        </div>
+
+        {/* Content */}
+        <div className='flex-1 overflow-y-auto p-4'>
+          {completedTasks.length === 0 ? (
+            <div className='text-center py-12 text-gray-500 dark:text-gray-400'>
+              暂无下载记录
+            </div>
+          ) : (
+            <div className='space-y-2'>
+              {completedTasks.map((task) => (
+                <div
+                  key={task.id}
+                  className={`p-4 border rounded-lg transition-colors cursor-pointer ${
+                    selectedIds.has(task.id)
+                      ? 'border-green-500 bg-green-50 dark:bg-green-900/20'
+                      : 'border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-800'
+                  }`}
+                  onClick={() => handleToggleSelect(task.id)}
+                >
+                  <div className='flex items-start gap-3'>
+                    <div className='flex-shrink-0 mt-1'>
+                      <div className={`w-5 h-5 rounded border-2 flex items-center justify-center ${
+                        selectedIds.has(task.id)
+                          ? 'border-green-500 bg-green-500'
+                          : 'border-gray-300 dark:border-gray-600'
+                      }`}>
+                        {selectedIds.has(task.id) && (
+                          <Check className='w-3 h-3 text-white' />
+                        )}
+                      </div>
+                    </div>
+                    <div className='flex-1 min-w-0'>
+                      <div className='flex items-start justify-between gap-2'>
+                        <div className='flex-1 min-w-0'>
+                          <h3 className='text-sm font-medium text-gray-800 dark:text-gray-200 truncate'>
+                            {task.title}
+                          </h3>
+                          {task.videoTitle && (
+                            <p className='text-xs text-gray-500 dark:text-gray-400 mt-1'>
+                              {task.videoTitle}
+                            </p>
+                          )}
+                          {task.episodeTitle && (
+                            <p className='text-xs text-gray-500 dark:text-gray-400'>
+                              {task.episodeTitle}
+                            </p>
+                          )}
+                        </div>
+                        <div className='flex-shrink-0 text-right'>
+                          <div className='text-xs text-gray-500 dark:text-gray-400'>
+                            {formatDate(task.completedAt)}
+                          </div>
+                          {task.fileSize && (
+                            <div className='text-xs text-gray-500 dark:text-gray-400 mt-1'>
+                              {formatFileSize(task.fileSize)}
+                            </div>
+                          )}
+                        </div>
+                      </div>
+                      <div className='flex items-center gap-2 mt-2 text-xs text-gray-500 dark:text-gray-400'>
+                        <span>来源: {task.source}</span>
+                        <span>•</span>
+                        <span>第 {task.episodeIndex + 1} 集</span>
+                        <span>•</span>
+                        <span>{task.downloadMode === 'filesystem' ? 'File System API' : '浏览器下载'}</span>
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>,
+    document.body
+  )}
+
+      <ConfirmDialog
+        isOpen={showConfirmDialog}
+        title='确认删除'
+        message={`确定要删除选中的 ${selectedIds.size} 个下载记录吗？\n\n注意：如果是 File System API 下载的文件，将会从磁盘删除实际文件。`}
+        confirmText='删除'
+        cancelText='取消'
+        variant='danger'
+        onConfirm={handleConfirmDelete}
+        onCancel={() => setShowConfirmDialog(false)}
+      />
+    </>
+  );
+}