'use strict';

module.exports = Franz => {
  const getMessages = function getMessages() {
    // get new msg count
    let count = 0;
    let counters = document.querySelectorAll('.unread_message_count:not([style="display: none;"])');
    counters = Array.prototype.slice.call(counters, Math.floor(counters.length / 2));
    [].filter.call(counters, countValues => {
      if (countValues) {
        const countValue = countValues.querySelector('.unread_message_count_value');
        if (countValue.innerHTML.length > 0) {
          count += parseInt(countValue.innerHTML);
        }
      }
    });
    Franz.setBadge(count);

    // force scroll to bottom of chat window
    const chatBoxes = document.querySelectorAll('.chat_dialog');
    if (chatBoxes) {
      const chatBox = [].filter.call(chatBoxes, chat => {
        return chat.style.display !== 'none';
      });
      if (chatBox[0]) {
        const chatWindow = chatBox[0].querySelector('.chat_dialog_scroll');
        chatWindow.scrollTop = chatWindow.scrollHeight;
      }
    }
  };

  Franz.loop(getMessages);
};
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