Google Apps Script for PaperCall -> Slack

gas_papercall_slack.js

var slackIncomingWebhookUrl = 'https://xxxxxxxxxxxx';
var postChannel = "#serverlessdays2019";
var postIcon = ":papercall:";
var postUser = "PaperCall";
var postColor = "#FF7F50";

var messageFallback = "The attachment must be viewed as plain text.";
var messagePretext = "CFPの応募があったよ！\nhttps://www.papercall.io/slsdaystokyo2019";
var title = "Serverless Days Tokyo CFP";
var searchString = "New Submission For ServerlessDays Tokyo 2019";
var maxThreads = 100;

function searchContactMail() {
  var query = searchString;
  var messages = getMessages(query);
  var newCount = 0;
  var totalCount = 0;
  for (var i = 0 ; i < messages.length; i++) {
    totalCount += messages[i].length;
    for (var j = 0; j < messages[i].length; j++) {
      var msg = messages[i][j];
      if (!msg.isStarred()) {
        //Logger.log("starred: " + msg.isStarred());
        console.info("date: " + msg.getDate());
        msg.star()
        newCount++;
      }
    }
  }
  if (newCount > 0) {
    submitValuesToSlack(newCount, totalCount);
  }
  //Logger.log("Total messages: " + totalCount);
  console.info("Total messages: " + totalCount);
}

function getMessages(query) {
  var threads = GmailApp.search(query, 0, maxThreads);
  var messages = GmailApp.getMessagesForThreads(threads);
  //Logger.log("threads:" + threads.length);
  console.info("threads:" + threads.length);
  return messages
}

function submitValuesToSlack(newCount, totalCount) {
  var fields = [
  {
    "title" : "新規応募",
    "value" : newCount,
    "short" : false
  },
  {
    "title" : "総応募件数",
    "value" : totalCount,
    "short" : false
  }    
  ];
  var attachments = [{
    "fallback" : messageFallback,
    "pretext" : messagePretext,
    "mrkdwn_in" : ["pretext"],
    "color" : postColor,
    "fields" : fields
  }]
  var payload = {
    "channel": postChannel,
    "username": postUser,
    "icon_emoji": postIcon,
    "link_names": 1,
    "attachments": attachments
  };
  var options = {
    'method': 'post',
    'payload': JSON.stringify(payload)
  };
  var response = UrlFetchApp.fetch(slackIncomingWebhookUrl, options);
}