Add tree multiselection, batch actions and Markdown export

web/src/app/batch.ts

@@ -0,0 +1,41 @@
+import { api } from './api'
+import { basename, joinPath } from './paths'
+import { minimalPaths } from './selection'
+import { flush, move, refreshTree, remove, toast, ws } from './workspace'
+
+export async function batchFiles(action: 'move' | 'delete', paths: string[], destination = '') {
+  const subjects = minimalPaths(paths)
+  if (action === 'delete' && !confirm(`将选中的 ${subjects.length} 项移入回收站？文件夹内的内容也会一起删除。`)) return
+  const failures: string[] = []
+  let succeeded = 0
+  for (const path of subjects) {
+    try {
+      const result = action === 'move' ? await move(path, joinPath(destination, basename(path))) : await remove(path)
+      if (result.ok) succeeded++
+      else failures.push(`${path}：${result.error}`)
+    } catch (cause) { failures.push(`${path}：${cause instanceof Error ? cause.message : String(cause)}`) }
+  }
+  await refreshTree().catch((cause) => toast('刷新目录失败：' + String(cause)))
+  toast(`${action === 'move' ? '移动' : '删除'}完成：成功 ${succeeded} 项，失败 ${failures.length} 项${failures.length ? '；' + failures.join('；') : ''}`)
+}
+
+export async function exportFiles(paths: string[]) {
+  const subjects = minimalPaths(paths)
+  const tabs = ws.tabs.filter((tab) => subjects.some((path) => tab.path === path || tab.path.startsWith(path + '/')))
+  try {
+    await Promise.all(tabs.map((tab) => flush(tab.path)))
+    if (tabs.some((tab) => tab.dirty || tab.status !== 'ready')) throw new Error('请先保存笔记并解决冲突，再导出')
+    const response = await api.exportFiles(subjects)
+    const blob = await response.blob()
+    const disposition = response.headers.get('Content-Disposition') ?? ''
+    const encoded = /filename\*=utf-8''([^;]+)/i.exec(disposition)?.[1]
+    const plain = /filename="([^"]+)"|filename=([^;]+)/i.exec(disposition)
+    const filename = encoded ? decodeURIComponent(encoded) : plain?.[1] ?? plain?.[2] ?? '导出.zip'
+    const url = URL.createObjectURL(blob)
+    const link = Object.assign(document.createElement('a'), { href: url, download: filename })
+    document.body.append(link)
+    link.click()
+    link.remove()
+    setTimeout(() => URL.revokeObjectURL(url), 1000)
+  } catch (cause) { toast('导出失败：' + (cause instanceof Error ? cause.message : String(cause))) }
+}