Telegram Bot 判断群消息的来源和处理有人入群， 有人被踢等[第六集]

本视频是Telegram Bot 机器人编程系列的第六集。 本集介绍群消息的格式， 原来机器人收到的消息是长这个样子呀。 还有如何处理群通知，比如说有人入群，有人被移出群， 有消息被置顶等

相关的代码请翻到下面

下期预告：
Telegram Bot 连接Mongo DB 数据库， 超酷超好用的JSON数据库， 不需要学SQL啦[第七集]

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function doGet(e){
  return HtmlService.createHtmlOutput("Hello World!! No, this link should be hidden!!!");
  
 //  return HtmlService.createHtmlOutputFromFile('Index');
}


function doPost(e){
  var body = JSON.parse(e.postData.contents);
  
  body.message.chat.id = body.message.chat.id + '';

  var payload = preparePayload(body);
  var data = {    
    "method": "post",
    "contentType": 'application/json',
    "payload": JSON.stringify(payload),
  }
  
  UrlFetchApp.fetch("https://api.telegram.org/bot682267360:AAHmjSil8oylavD2pENLLpcMU1svaD7mVeA/", data);
}

function getName(user) {
  var name = user.first_name;
  if (user.last_name) {
    name += " " + user.last_name;
  }

  return name;
}

function escapeMarkDown(toEscapeMsg) {
  var escapedMsg = toEscapeMsg
  .replace(/_/g, "\\_")
  .replace(/\*/g, "\\*")
  .replace(/\[/g, "\\[")
  .replace(/`/g, "\\`");
    return escapedMsg;

}


function getMentionName(user) {
  var username = user.username;
  var mentionName = "";

  var name = getName(user);
  if (!name) {
    name = "神秘人";
  }

  // if (!username) {
    mentionName = getMarkDownUserUrl(escapeMarkDown(name), user.id);
  // } else {
  //   mentionName = "[" + escapeMarkDown(name) + "](@" + escapeMarkDown(username) + ")";
  // }

  return mentionName;
}

function getMarkDownUserUrl(userName, userId) {
  return "[" + userName + "](tg://user?id=" + userId + ")";
}


function preparePayload(body){
  var payload;
  
  if (body.message.new_chat_member) {
     payload = {
        "method": "sendMessage",
        "chat_id": body.message.chat.id,
        "text": "你好， 欢迎加入本群",
        "parse_mode": "Markdown",
        "disable_web_page_preview": true,
      } 
      
      payload.text = "你好!" + getMentionName(body.message.new_chat_member) + ", 欢迎加入本群";
      return payload;
  }
  
  if (body.message.left_chat_member) {
     payload = {
        "method": "sendMessage",
        "chat_id": body.message.chat.id,
        "text": "你好， 欢迎加入本群",
        "parse_mode": "Markdown",
        "disable_web_page_preview": true,
      } 
      
      payload.text = getMentionName(body.message.left_chat_member) + "君, 一路走好！";
      return payload;
  }
  
   if (body.message.pinned_message) {
    payload = {
        "method": "sendMessage",
        "chat_id": body.message.chat.id,
        "text": "你好， 欢迎加入本群",
        "parse_mode": "Markdown",
        "disable_web_page_preview": true,
      } 
    var whoPinned = getName(body.message.from);
    var whoOwned = getName(body.message.pinned_message.from);

    payload.text = whoPinned + "置顶了消息:\n\n" + body.message.pinned_message.text
      + "\n\n"
      + "本BOT代表" + whoOwned + "感谢您"
      ;
    return payload;
  }


  body.message.text = body.message.text.toLowerCase();
  body.message.text = body.message.text.replace(/@temptestbot2/g, '');
  
  var paras = body.message.text.trim().split(" ");
  // remove empty strings
  paras = paras.filter(function(para){
    if (para){
      return true;
    }
  });
  
  
  
  if (body.message.text){
  
      payload = {
        "method": "sendMessage",
        "chat_id": body.message.chat.id,
        "text": "你好， 欢迎使用本机器人， 本机器人现在只认识颜色。",
        "parse_mode": "Markdown",
        "disable_web_page_preview": true,
      } 
      
      if(body.message.text.indexOf("/help") === 0){      
         payload.text = "你好， 欢迎使用本机器人， 本机器人现在只认识颜色。";
         return payload;
      }
      
      if(body.message.text.indexOf("/colors") === 0){   
         payload.text = "红\n黄\n蓝";        
         return payload;
      }
      
      if(body.message.text.indexOf("/list") === 0){ 
         if (paras[1]){
           switch (paras[1].toLowerCase()){
             case "people":  
               if (paras[2]){
                 if ("JS神技能".toLowerCase().indexOf(paras[2]) >= 0){
                   payload.text = "JS神技能 - https://www.youtube.com/channel/UC6tPP3jOTKgjqfDgqMsaG4g";
                 }
                 if ("悟空的日常".toLowerCase().indexOf(paras[2]) >= 0){
                   payload.text = "悟空的日常 - https://www.youtube.com/channel/UCii04BCvYIdQvshrdNDAcww";
                 }
                 if ("YuFeng Deng".toLowerCase().indexOf(paras[2]) >= 0){
                   payload.text = "YuFeng Deng - https://www.youtube.com/channel/UCG6xoef2xU86hnrCsS5m5Cw";
                 }
               } else {                 
                 payload.text = "JS神技能\n"
                   + "悟空的日常\n"
                   + "YuFeng Deng\n";        
                   return payload;
                }
               break;
             default:  
               payload.text = "红\n黄\n蓝";            
             break;
           }
                
           return payload;
         } else {         
           payload.text = "*JS神技能*\n"
             + "[悟空的日常](https://www.youtube.com/channel/UCii04BCvYIdQvshrdNDAcww)\n"
             + "[*YuFeng Deng*](https://www.youtube.com/channel/UCG6xoef2xU86hnrCsS5m5Cw)\n"
             + "_YuFeng Deng_\n"
             + "`01|" + "UCii04BCvYIdQvshrdNDAcww" + " | `\n"
             + "`02|" + "UCG6xoef2xU86hnrCsS5m5Cw" + " | `\n"
             + "```javascript\n"
             + 'payload = {\n'
             + '    "method": "sendMessage",\n'
             + '    "chat_id": body.message.chat.id,\n'
             + '    "text": body.message.text,\n'
             + '}'
             + "```"
             ;
                       
            var inlineKeyboardMarkup = {};
            inlineKeyboardMarkup.inline_keyboard = [];
            var keyboardRow = [];
            var keyboardButton1 = {
                text: "按钮1",
                url: "https://www.google.com"
            };
            
            var keyboardButton2 = {
                text: "按钮2",
                url: "https://www.google.com"
            };
            
            var keyboardRow2 = [];
            var keyboardButton3 = {
                text: "按钮3",
                url: "https://www.google.com"
            };
            
            var keyboardButton4 = {
                text: "按钮4",
                url: "https://www.google.com"
            };

            keyboardRow.push(keyboardButton1);
            keyboardRow.push(keyboardButton2);
            
            keyboardRow2.push(keyboardButton3);
            keyboardRow2.push(keyboardButton4);
            inlineKeyboardMarkup.inline_keyboard.push(keyboardRow);
            inlineKeyboardMarkup.inline_keyboard.push(keyboardRow2);
            payload.reply_markup = inlineKeyboardMarkup;

       
           return payload;
         }
      }
      

  
      payload = {
          "method": "sendMessage",
          "chat_id": body.message.chat.id,
          "text": body.message.text,
      } 
	
  }
  else if (body.message.sticker){
    payload = {
      "method": "sendSticker",
      "chat_id": body.message.chat.id,
      "sticker": body.message.sticker.file_id
    }
   }
  else if (body.message.photo){
    array = body.message.photo;
    text = array[1];
    payload = {
      "method": "sendPhoto",
      "chat_id": body.message.chat.id,
      "photo": text.file_id
    }
   }
    else {
    payload = {
      "method": "sendMessage",
      "chat_id": body.message.chat.id,
      "text": "Try other stuff"
    }
   }
  return payload
}