webapp_calendar.gs

/**
 * this function return data from Google calendar
 * @return(object) return JSON Object with data.
 */
const doGet = () => {
  const events = JSON.stringify(getAllEvents_());
  return ContentService.createTextOutput(events).setMimeType(ContentService.MimeType.JSON);
}

/**
 * Lists the next 100 upcoming events in the user's default calendar.
 * @return(object) Custom Object who contains 100 next events from Google Calendar.
 */
const getAllEvents_ = () => {
  const calendarId = 'CalendarID'; // TODO add target calendar ID
  const now = new Date();
  const data = [];
  const events = Calendar.Events.list(calendarId, {
    timeMin: now.toISOString(),
    singleEvents: true,
    orderBy: 'startTime',
    maxResults: 100
  });
  if (events.items && events.items.length > 0) {
    for (let i = 0; i < events.items.length; i++) {
      const d = {}
      const event = events.items[i];
      d.podcast_title = event.summary;
      d.podcast_start = event.start.dateTime;
      d.podcast_end = event.end.dateTime;
      d.podcast_animator = event.description ? event.description.split(',') : [];
      d.image = getPictureForProgram_(event.summary);
      data.push(d);
    };
  } else {
    console.error('No events found.');
  }
  return data;
}

/**
 * Get picture in Google Drive corresponding to a keyword who is passed.
 * @param(string) keyword to search.
 * @return(string) url result from search or default picture url.
 */
const getPictureForProgram_ = (programName) => {
  const folder = DriveApp.getFolderById(FOLDERID) // TODO add folder id where pictures are stored.
  const files = folder.getFiles();
  let url;
  while (files.hasNext()) {
    let file = files.next();
    if (file.getName().indexOf(programName) !== -1) {
      url = file.getUrl();
    }
  }
  if (!url) {
    programName = 'default';
    while (files.hasNext()) {
      let file = files.next();
      if (file.getName().indexOf(programName) !== -1) {
        url = file.getUrl();
      }
    }
  }
}