Archipelago — open-source initial import

2026-08-12 10:55:50 +00:00
commit b67e1527a2
2068 changed files with 472303 additions and 0 deletions
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+import type { Conversation } from '@aiui/core/types/message'
+
+export type ExportFormat = 'markdown' | 'json' | 'text'
+
+function formatTimestamp(ts: number): string {
+  return new Date(ts).toLocaleString()
+}
+
+export function exportAsMarkdown(conv: Conversation): string {
+  const lines = [`# ${conv.title}\n`, `_Exported ${formatTimestamp(Date.now())}_\n`]
+  for (const msg of conv.messages) {
+    const role = msg.role === 'user' ? '**You**' : '**Assistant**'
+    const time = formatTimestamp(msg.timestamp)
+    lines.push(`### ${role} — ${time}\n`)
+    lines.push(msg.content + '\n')
+  }
+  return lines.join('\n')
+}
+
+export function exportAsJSON(conv: Conversation): string {
+  return JSON.stringify(conv, null, 2)
+}
+
+export function exportAsText(conv: Conversation): string {
+  const lines = [conv.title, '='.repeat(conv.title.length), '']
+  for (const msg of conv.messages) {
+    const role = msg.role === 'user' ? 'You' : 'Assistant'
+    lines.push(`[${role}] ${formatTimestamp(msg.timestamp)}`)
+    lines.push(msg.content)
+    lines.push('')
+  }
+  return lines.join('\n')
+}
+
+function getExtension(format: ExportFormat): string {
+  switch (format) {
+    case 'markdown': return '.md'
+    case 'json': return '.json'
+    case 'text': return '.txt'
+  }
+}
+
+function getMimeType(format: ExportFormat): string {
+  switch (format) {
+    case 'markdown': return 'text/markdown'
+    case 'json': return 'application/json'
+    case 'text': return 'text/plain'
+  }
+}
+
+export async function downloadConversation(conv: Conversation, format: ExportFormat): Promise<void> {
+  let content: string
+  switch (format) {
+    case 'markdown': content = exportAsMarkdown(conv); break
+    case 'json': content = exportAsJSON(conv); break
+    case 'text': content = exportAsText(conv); break
+  }
+
+  const filename = `${conv.title.replace(/[^a-zA-Z0-9 ]/g, '').trim().replace(/\s+/g, '-').toLowerCase()}${getExtension(format)}`
+  const blob = new Blob([content], { type: getMimeType(format) })
+
+  // Try File System Access API first
+  if ('showSaveFilePicker' in window) {
+    try {
+      const handle = await (window as unknown as { showSaveFilePicker: (opts: unknown) => Promise<FileSystemFileHandle> }).showSaveFilePicker({
+        suggestedName: filename,
+        types: [{
+          description: format === 'markdown' ? 'Markdown' : format === 'json' ? 'JSON' : 'Text',
+          accept: { [getMimeType(format)]: [getExtension(format)] },
+        }],
+      })
+      const writable = await handle.createWritable()
+      await writable.write(blob)
+      await writable.close()
+      return
+    } catch {
+      // User cancelled or API not supported — fall through to download
+    }
+  }
+
+  // Fallback: <a download>
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = filename
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+  URL.revokeObjectURL(url)
+}