Function buildContent

packages/parser/src/formats/utils/telegram-utils.ts:122–148

(msg: TelegramMessage)

 * 构建消息内容
 */
export function buildContent(msg: TelegramMessage): string | null {
  const text = extractText(msg.text)

  // Service 消息
  if (msg.type === 'service') {
    const action = msg.action || ''
    const members = msg.members?.join(', ') || ''
    if (members) return `[${action}] ${members}`
    // action 为空时回退到文本，避免常量表达式触发 lint 规则。
    if (action) return `[${action}]`
    return text || null
  }

  // 贴纸：使用 emoji 表示
  if (msg.media_type === 'sticker' && msg.sticker_emoji) {
    return text ? `[sticker ${msg.sticker_emoji}] ${text}` : `[sticker ${msg.sticker_emoji}]`
  }

  // 媒体消息带文字说明
  if (msg.photo || msg.file || msg.media_type) {
    const mediaLabel = msg.media_type || (msg.photo ? 'photo' : 'file')
    if (text) return `[${mediaLabel}] ${text}`
    return `[${mediaLabel}]`
  }

  return text || null
}