Google App Script: Gmail_Label_Chatwork_Notifier

Code.gs

/**
# ChatWorkでの事前準備
1. 発言させたいルームにBOTを追加する

# Gmailでの事前準備
1. "#GAS/ENQ", "#GAS/DEQ" のラベルを作成しておく
2. 通知対象のメールに "#GAS/ENQ" のラベルが付加されるようにフィルタの設定をしておく
*/
var CHATWORK_TOKEN = "__TOKEN__",
    CHATWORK_ROOM_ID = "__RID__",
    CONTENT_MAX_LINE = 1,
    REPLY_TO_UIDS = [
       687933,
    ],
    LABEL_ENQ = "#GAS/ENQ",
    LABEL_DEQ = "#GAS/DEQ";

function Gmail_Label_Chatwork_Notifier() {
  var targetLabel, notifiedLabel, threads, thread, messages;

  targetLabel = GmailApp.getUserLabelByName(LABEL_ENQ);
  notifiedLabel = GmailApp.getUserLabelByName(LABEL_DEQ);
  
  threads = targetLabel.getThreads().reverse();

  for (var i in threads) {
    thread = threads[i];
    messages = thread.getMessages().reverse();
    for (var j in messages) {
      notify(messages[j]);
    }
    thread.removeLabel(targetLabel).addLabel(notifiedLabel);
  }
  Logger.log("DONE");
}

function notify(message) {
  var cw = ChatWorkClient.factory({token: CHATWORK_TOKEN});
  
  try {
    cw.sendMessage({room_id: CHATWORK_ROOM_ID, body: format(message)});
  } catch (e) {
    Logger.log(e.message);
    throw new e;
  }
}

function format(message) {
  var replyHeader, content;
  replyHeader = generateReplyTargets(REPLY_TO_UIDS);
  content = generateContent(message)
  return replyHeader.length > 0 ? replyHeader + "\n" + content : content;
}

function generateContent(message) {
  var subject = message.getSubject(),
      body = message.getPlainBody().trim(),
      postLength = 0;

  for (var i = 0; i < CONTENT_MAX_LINE + 1; ++i) {
    postLength = body.indexOf("\n", postLength + 1);
  }
  if (postLength !== -1 && postLength < body.length) {
    body = body.substr(0, postLength).trim();
    body = body + "\n...";
  }
  return "[info][title]" + subject + "[/title]" + body + "[/info]";
}

function generateReplyTargets(uid_list) {
  var body = '';
  for (var i = 0; i < uid_list.length; ++i) {
    body = body + '[To:' + uid_list[i] + '] ';
  }
  return body.trim();
}