import { emojiMap, emojiUrl } from './emojiMap'
/** 传入messageBody（群系统消息SystemMessage，群提示消息GroupTip除外）
 * payload = {
 *  msgType: 'TIMTextElem',
 *  msgContent: {
 *    text: 'AAA[龇牙]AAA[龇牙]AAA[龇牙AAA]'
 *  }
 *}
 **/
export function decodeText (payload) {
  let renderDom = []
  // 文本消息
  let temp = payload
  let left = -1
  let right = -1
  while (temp !== '') {
    left = temp.indexOf('[')
    right = temp.indexOf(']')
    switch (left) {
      case 0:
        if (right === -1) {
          renderDom.push({
            name: 'text',
            text: temp
          })
          temp = ''
        } else {
          let _emoji = temp.slice(0, right + 1)
          if (emojiMap[_emoji]) {
            renderDom.push({
              name: 'img',
              src: emojiUrl + emojiMap[_emoji]
            })
            temp = temp.substring(right + 1)
          } else {
            renderDom.push({
              name: 'text',
              text: '['
            })
            temp = temp.slice(1)
          }
        }
        break
      case -1:
        renderDom.push({
          name: 'text',
          text: temp
        })
        temp = ''
        break
      default:
        renderDom.push({
          name: 'text',
          text: temp.slice(0, left)
        })
        temp = temp.substring(left)
        break
    }
  }
  return renderDom
}
