4-2-2 判斷是否為好友

取得好友資訊

      let lineUser = getLineUser(source.userId);
      let botInfo = getLineBotInfo();
      if (lineUser.displayName == '') {
        let url = `https://line.me/R/ti/p/${botInfo.basicId}`;
        //---------------------------------- flex(請加好友)
        let messages = [{
          "type": "flex",
          "altText": "請加好友",//訊息副標題
          "contents": errorFlexTemplate(url)
        }];
        
        lineReplyMessage(replyToken, messages);
        return;
      }

errorFlexTemplate

/*============================================
  請加好友
  https://developers.line.biz/flex-simulator/  
  https://line.me/R/ti/p/{basicId}
============================================*/
function errorFlexTemplate(url) {
  let content = `點擊連結，請加好友`;

  let messages = {
    "type": "bubble",
    "hero": {
      "type": "image",
      "url": "https://i.imgur.com/klNWUuY.png",//圖片
      "size": "full",
      "aspectRatio": "20:13",
      "aspectMode": "cover"
    },
    "body": {
      "type": "box",
      "layout": "vertical",
      "contents": [
        {
          "type": "text",
          "text": "請加「好友」",//標題
          "weight": "bold",
          "size": "xl"
        },
        {
          "type": "text",
          "text": content,//內容
          "wrap": true,
          "color": "#666666",
          "size": "sm",
        },
        {
          "type": "button",
          "style": "link",
          "height": "sm",
          "action": {
            "type": "uri",
            "label": "請加好友",
            "uri": url
          }
        }
      ]
    }
  }
  return messages;
}