text: // Copyright (c) 2018, Compiler Explorer Authors
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  //     * Redistributions of source code must retain the above copyright notice,
  //       this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above copyright
  //       notice, this list of conditions and the following disclaimer in the
  //       documentation and/or other materials provided with the distribution.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  // POSSIBILITY OF SUCH DAMAGE.
  
  'use strict';
  var $ = require('jquery'),
      _ = require('underscore'),
      ga = require('analytics');
  
  function handleMotd(motd, motdNode, subLang, adsEnabled, onHide) {
      if (motd.motd) {
          motdNode.find('.content').html(motd.motd);
          motdNode.removeClass('d-none');
          motdNode.find('.close')
              .on('click', function () {
                  motdNode.addClass('d-none');
              })
              .prop('title', 'Hide message');
      } else if (adsEnabled) {
          var applicableAds = _.filter(motd.ads, function (ad) {
              return !subLang || !ad.filter || ad.filter.length === 0 || ad.filter.indexOf(subLang) >= 0;
          });
          var randomAd = applicableAds[_.random(applicableAds.length - 1)];
          if (randomAd) {
              motdNode.find('.content').html(randomAd.html);
              motdNode.find('.close').on('click', function () {
                  ga.proxy('send', {
                      hitType: 'event',
                      eventCategory: 'Ads',
                      eventLabel: 'Visibility',
                      eventAction: 'Hide',
                  });
                  motdNode.addClass('d-none');
                  onHide();
              });
              motdNode.find('a').on('click', function () {
                  ga.proxy('send', {
                      hitType: 'event',
                      eventCategory: 'Ads',
                      eventAction: 'Click',
                      eventLabel: this.href,
                  });
              });
              motdNode.removeClass('d-none');
          }
      }
  }
  
  function initialise(url, motdNode, defaultLanguage, adsEnabled, onMotd, onHide) {
      if (!url) return;
      $.getJSON(url)
          .then(function (res) {
              onMotd(res);
              handleMotd(res, motdNode, defaultLanguage, adsEnabled, onHide);
          })
          .catch(function () {
              // do nothing! we've long tried to find out why this might fail, and it seems page load cancels or ad
              // blockers might reasonably cause a failure here, and it's no big deal.
              // Some history at https://github.com/compiler-explorer/compiler-explorer/issues/1057
          });
  }
  
  module.exports = {
      initialise: initialise,
  };
  