Post GitHub trends to Chatwork

gistfile1.js

/**
 * @var int
 */
var MAX_REPOS = 4;

/**
 * @return void
 */
function postToChatworkGitHubTrends () {
  var trends  = parseGitHubTrends();
  var message = createTrendMessage(trends);
  
  postToChatWork(message);
}

/**
 * Parse github trends
 *
 * @return array
 */
function parseGitHubTrends () {
  var results = [];
  
  var url = 'https://github.com/trending';
  var response = UrlFetchApp.fetch(url).getContentText();
  
  var pattern = /<a href="([^"]*)">/g;
  var matches = response.match(pattern);
  
  for (i in matches) {
    if (i > MAX_REPOS) break;
    
    var product = match[i].replace('<a href=\"', '');
    product = product.replace('">', '');
    product = product.match(/^\/[^\/]*\/[^\/]*$/);
    
    if (product != null) {
        results.push(product);
    }
  }
  
  return results;
}
  
/**
 * Create a message to post to chat
 *
 * @param  array trends
 * @return string
 */
function createTrendMessage (trends) {
  var message = '[info][title]最新の GitHub トレンド[/title]\n';
  
  if (trends.length === 0) {
    message += '最新のトレンドはありません';
  } else {
    for (i in trends) {
      var url = 'https://github.com'+encodeURI(trends[i]);
      message += url+'\n';
    }
  }
  
  message += '\n\nToday\'s trending repositories -- https://github.com/trending[/info]';
  return message;
}

/**
 * Post to chat
 *
 * @param  string message
 * @return void
 */
function postToChatWork (message) {
  var api_key = 'YOUR_API_KEY';
  var room_id = 'ROOM_ID';
  
  message = encodeURI(message);
  
  try {
    UrlFetchApp.fetch('https://api.chatwork.com/v1/rooms/'+room+'/messages?body='+message, {
      method: 'POST',
      headers: {'X-ChatWorkToken': api_key}
    });
  } catch (e) {
    Logger.log(e);
  }
}