Gmail App: Find threads which have a calendar entry

Question

Some messages have calendar entries at the top of them like this:

In GScript, is there any way to find messages which have these calendar entries? If so, how does one extract the information from it?

Update

I took a lucky shot and found that it's classed as an attachment (of type ics), but there still remains the issue of extracting the data from this file...

Answer 1

Try this:

function getIcs(){
  var threads = GmailApp.getInboxThreads();
  var thread, messages, message, attachments, attachment;
  var result = [];

  for (var i = 0; i < threads.length; i++){
    messages = threads[i].getMessages();
    for (var j = 0; j < messages.length; j++){
      message = messages[j];
      attachments = message.getAttachments();
      for (var k = 0; k < attachments.length; k++){
        attachment = attachments[k];        
        if(attachment){
          if (attachment.getContentType() == "application/ics"){
            Logger.log("found ics");//continue;
            result.push(message);
          }
        }
      }
    }
  }
  return result;
}

This method will view every thread, every message in it and every attachment in each message, and returns a list of the message objects that have an attachment of type application/ics.

UPDATE

In addition to my previous code, the following function will return an array of event objects based on the attachments found in the other method:

function getSutff(){
  var msgs = getIcs();
  var ics;
  var position;
  var eventId;
  var event = [];

  for (var i = 0; i < msgs.length; i++){
    ics = msgs[i].getAttachments()[0].getDataAsString();
    position = (ics.search("UID:")) + 4;
    eventId = ics.substr(position,26);
    event.push(CalendarApp.getEventById(eventId));
  }
  Logger.log(event)
  return event;
}