MediaWiki:Gadget-rtrc.js

/**
 * Real-Time Recent Changes
 * https://gerrit.wikimedia.org/g/mediawiki/gadgets/RTRC
 *
 * @copyright 2010 Timo Tijhof
 */

// Array#includes polyfill (ES2016/ES7)
// eslint-disable-next-line
Array.prototype.includes||Object.defineProperty(Array.prototype,"includes",{value:function(r,e){if(null==this)throw new TypeError('"this" is null or undefined');var t=Object(this),n=t.length>>>0;if(0===n)return!1;var i,o,a=0|e,u=Math.max(a>=0?a:n-Math.abs(a),0);for(;u<n;){if((i=t[u])===(o=r)||"number"==typeof i&&"number"==typeof o&&isNaN(i)&&isNaN(o))return!0;u++}return!1}});

/* global alert, mw, $ */
(function () {
  'use strict';

  /**
   * Configuration
   * -------------------------------------------------
   */
  // eslint-disable-next-line one-var
  var
    appVersion = 'v1.4.7',
    conf = mw.config.get([
      'skin',
      'wgAction',
      'wgCanonicalSpecialPageName',
      'wgPageName',
      'wgTitle',
      'wgUserLanguage',
      'wgDBname',
      'wgScriptPath'
    ]),
    // Can't use mw.util.wikiScript until after #init
    apiUrl = conf.wgScriptPath + '/api.php',
    cvnApiUrl = 'https://cvn.wmflabs.org/api.php',
    oresApiUrl = 'https://ores.wikimedia.org/v3/scores/' + conf.wgDBname,
    oresModel = null,
    intuitionLoadUrl = 'https://meta.wikimedia.org/w/index.php?title=User:Krinkle/Scripts/Intuition.js&action=raw&ctype=text/javascript',
    docUrl = 'https://meta.wikimedia.org/wiki/User:Krinkle/Tools/Real-Time_Recent_Changes?uselang=' + conf.wgUserLanguage,
    // 32x32px
    ajaxLoaderUrl = 'https://upload.wikimedia.org/wikipedia/commons/d/de/Ajax-loader.gif',
    annotations = {
      // by RCID
      patrolled: new Map(),
      // by username
      cvn: new Map(),
      // by revision ID
      ores: new Map()
    },
    // See annotationsCheck()
    ANNOTATION_CACHE_LIMIT = 1000,

    // Info from the wiki - see initData()
    userHasPatrolRight = false,
    rcTags = [],
    wikiTimeOffset = 0,

    // State
    updateFeedTimeout,
    rcDayHeadPrev,
    skippedRCIDs = [],
    monthNames,
    prevFeedHtml,
    updateReq,

    // Default settings for the feed
    defOpt = {
      rc: {
        // Timestamp
        start: undefined,
        // Timestamp
        end: undefined,
        // Direction "older" (descending) or "newer" (ascending)
        dir: 'older',
        // Array of namespace ids
        namespace: undefined,
        // User name
        user: undefined,
        // Tag ID
        tag: undefined,
        // Filters
        hideliu: false,
        hidebots: true,
        unpatrolled: false,
        limit: 25,
        // Type filters are "show matches only"
        typeEdit: true,
        typeNew: true
      },

      app: {
        refresh: 5,
        cvnDB: false,
        ores: false,
        massPatrol: false,
        autoDiff: false
      }
    },
    aliasOpt = {
      // Back-compat for v1.0.4 and earlier
      showAnonOnly: 'hideliu',
      showUnpatrolledOnly: 'unpatrolled'
    },
    // Current settings for the feed
    opt = makeOpt(),

    rAF = window.requestAnimationFrame || setTimeout,

    message, msg,
    currentDiff, currentDiffRcid,
    $wrapper, $body, $feed, $rcOptionsSubmit;

  /**
   * Utility functions
   * -------------------------------------------------
   */

  function makeOpt () {
    // Create a recursive copy of defOpt without exposing
    // any of its arrays or objects in the returned value,
    // so that the returned value can be modified in every way,
    // without causing defOpt to change.
    return $.extend(true, {}, defOpt);
  }

  /**
   * Prepend a leading zero if value is under 10
   *
   * @param {number} num Value between 0 and 99.
   * @return {string}
   */
  function pad (num) {
    return (num < 10 ? '0' : '') + num;
  }

  var timeUtil = {
    // Create new Date object from an ISO-8601 formatted timestamp, as
    // returned by the MediaWiki API (e.g. "2010-04-25T23:24:02Z")
    newDateFromISO: function (s) {
      return new Date(Date.parse(s));
    },

    /**
     * Apply user offset
     *
     * Only use this if you're extracting individual values from the object (e.g. getUTCDay or
     * getUTCMinutes). The internal timestamp will be wrong.
     *
     * @param {Date} d
     * @return {Date}
     */
    applyUserOffset: function (d) {
      var offset = mw.user.options.get('timecorrection');

      // This preference has no default value, it is null for users that don't
      // override the site's default timeoffset.
      var parts;
      if (offset) {
        parts = offset.split('|');
        if (parts[0] === 'System') {
          // Ignore offset value, as system may have started or stopped
          // DST since the preferences were saved.
          offset = wikiTimeOffset;
        } else {
          offset = Number(parts[1]);
        }
      } else {
        offset = wikiTimeOffset;
      }
      // There is no way to set a timezone in javascript, so instead we pretend the
      // UTC timestamp is different and use getUTC* methods everywhere.
      d.setTime(d.getTime() + (offset * 60 * 1000));
      return d;
    },

    // Get clocktime string adjusted to timezone of wiki
    // from MediaWiki timestamp string
    getClocktimeFromApi: function (s) {
      var d = timeUtil.applyUserOffset(timeUtil.newDateFromISO(s));
      // Return clocktime with leading zeros
      return pad(d.getUTCHours()) + ':' + pad(d.getUTCMinutes());
    }
  };

  /**
   * Main functions
   * -------------------------------------------------
   */

  /**
   * @param {Date} date
   * @return {string} HTML
   */
  function buildRcDayHead (date) {
    var current = date.getDate();
    if (current === rcDayHeadPrev) {
      return '';
    }
    rcDayHeadPrev = current;
    return '<div class="mw-rtrc-heading"><div><strong>' + date.getDate() + ' ' + monthNames[date.getMonth()] + '</strong></div></div>';
  }

  /**
   * @param {Object} rc Recent change object from API
   * @return {string} HTML
   */
  function buildRcItem (rc) {
    // Get size difference (can be negative, zero or positive)
    var diffsize = rc.newlen - rc.oldlen;

    // Convert undefined/empty-string values from API into booleans
    var isUnpatrolled = rc.unpatrolled !== undefined;

    // typeSymbol, diffLink & itemClass
    var typeSymbol = '&nbsp;';
    var itemClass = [];

    if (rc.type === 'new') {
      typeSymbol += '<span class="newpage">' + mw.message('newpageletter').escaped() + '</span>';
    }

    if ((rc.type === 'edit' || rc.type === 'new') && userHasPatrolRight && isUnpatrolled) {
      typeSymbol += '<span class="unpatrolled">!</span>';
    }

    if (rc.oldlen > 0 && rc.newlen === 0) {
      itemClass.push('mw-rtrc-item-alert');
    }

    /*
Example:

<div class="mw-rtrc-item mw-rtrc-item-patrolled" data-diff="0" data-rcid="0" user="Abc">
  <div first>(<a>diff</a>) <span class="unpatrolled">!</span> 00:00 <a>Page</a></div>
  <div user><a class="user" href="/User:Abc">Abc</a></div>
  <div comment><a href="/User talk:Abc">talk</a> / <a href="/Special:Contributions/Abc">contribs</a>&nbsp;<span class="comment">Abc</span></div>
  <div class="mw-rtrc-meta"><span class="mw-plusminus mw-plusminus-null">(0)</span></div>
</div>
    */

    // build & return item
    var item = buildRcDayHead(timeUtil.newDateFromISO(rc.timestamp));
    item += '<div class="mw-rtrc-item ' + itemClass.join(' ') + '" data-diff="' + rc.revid + '" data-rcid="' + rc.rcid + '" user="' + rc.user + '">';

    var diffLink;
    if (rc.type === 'edit') {
      diffLink = '<a class="rcitemlink diff" href="' +
        mw.util.wikiScript() + '?diff=' + rc.revid + '&oldid=' + rc.old_revid + '&rcid=' + rc.rcid +
        '">' + mw.message('diff').escaped() + '</a>';
    } else if (rc.type === 'new') {
      diffLink = '<a class="rcitemlink newPage">' + message('new-short').escaped() + '</a>';
    } else {
      diffLink = mw.message('diff').escaped();
    }

    item += '<div first>' +
      '(' + diffLink + ') ' + typeSymbol + ' ' +
      timeUtil.getClocktimeFromApi(rc.timestamp) +
      ' <a class="mw-title" href="' + mw.util.getUrl(rc.title) + '?rcid=' + rc.rcid + '" target="_blank">' + rc.title + '</a>' +
      '</div>' +
      '<div user>&nbsp;<small>&middot;&nbsp;' +
      '<a href="' + mw.util.getUrl('User talk:' + rc.user) + '" target="_blank">' + mw.message('talkpagelinktext').escaped() + '</a>' +
      ' &middot; ' +
      '<a href="' + mw.util.getUrl('Special:Contributions/' + rc.user) + '" target="_blank">' + mw.message('contribslink').escaped() + '</a>' +
      '&nbsp;</small>&middot;&nbsp;' +
      '<a class="mw-userlink" href="' + mw.util.getUrl((mw.util.isIPv4Address(rc.user) || mw.util.isIPv6Address(rc.user) ? 'Special:Contributions/' : 'User:') + rc.user) + '" target="_blank">' + rc.user + '</a>' +
      '</div>' +
      '<div comment>&nbsp;<span class="comment">' + rc.parsedcomment + '</span></div>';

    var el;
    if (diffsize > 0) {
      el = diffsize > 399 ? 'strong' : 'span';
      item += '<div class="mw-rtrc-meta"><' + el + ' class="mw-plusminus mw-plusminus-pos">(+' + diffsize.toLocaleString() + ')</' + el + '></div>';
    } else if (diffsize === 0) {
      item += '<div class="mw-rtrc-meta"><span class="mw-plusminus mw-plusminus-null">(0)</span></div>';
    } else {
      el = diffsize < -399 ? 'strong' : 'span';
      item += '<div class="mw-rtrc-meta"><' + el + ' class="mw-plusminus mw-plusminus-neg">(' + diffsize.toLocaleString() + ')</' + el + '></div>';
    }

    item += '</div>';
    return item;
  }

  /**
   * @param {Object} newOpt
   * @param {string} [mode=normal] One of 'quiet' or 'normal'
   * @return {boolean} True if no changes were made, false otherwise
   */
  function normaliseSettings (newOpt, mode) {
    var mod = false;

    // MassPatrol requires a filter to be active
    if (newOpt.app.massPatrol && !newOpt.rc.user) {
      newOpt.app.massPatrol = false;
      mod = true;
      if (mode !== 'quiet') {
        alert(msg('masspatrol-requires-userfilter'));
      }
    }

    // MassPatrol implies AutoDiff
    if (newOpt.app.massPatrol && !newOpt.app.autoDiff) {
      newOpt.app.autoDiff = true;
      mod = true;
    }
    // MassPatrol implies fetching only unpatrolled changes
    if (newOpt.app.massPatrol && !newOpt.rc.unpatrolled) {
      newOpt.rc.unpatrolled = true;
      mod = true;
    }

    return !mod;
  }

  function fillSettingsForm (newOpt) {
    var $settings = $($wrapper.find('.mw-rtrc-settings')[0].elements).filter(':input');

    if (newOpt.rc) {
      $.each(newOpt.rc, function (key, value) {
        var $setting = $settings.filter(function () {
          return this.name === key;
        });
        var setting = $setting[0];

        if (!setting) {
          return;
        }

        switch (key) {
          case 'limit':
            setting.value = value;
            break;
          case 'namespace':
            if (value === undefined) {
            // Value "" (all) is represented by undefined.
              $setting.find('option').eq(0).prop('selected', true);
            } else {
              $setting.val(value);
            }
            break;
          case 'user':
          case 'start':
          case 'end':
          case 'tag':
            setting.value = value || '';
            break;
          case 'hideliu':
          case 'hidebots':
          case 'unpatrolled':
          case 'typeEdit':
          case 'typeNew':
            setting.checked = value;
            break;
          case 'dir':
            if (setting.value === value) {
              setting.checked = true;
            }
            break;
        }
      });
    }

    if (newOpt.app) {
      $.each(newOpt.app, function (key, value) {
        var $setting = $settings.filter(function () {
          return this.name === key;
        });
        var setting = $setting[0];

        if (!setting) {
          setting = document.getElementById('rc-options-' + key);
          $setting = $(setting);
        }

        if (!setting) {
          return;
        }

        switch (key) {
          case 'cvnDB':
          case 'ores':
          case 'massPatrol':
          case 'autoDiff':
            setting.checked = value;
            break;
          case 'refresh':
            setting.value = value;
            break;
        }
      });
    }
  }

  function readSettingsForm () {
    // jQuery#serializeArray is nice, but doesn't include "value: false" for unchecked
    // checkboxes that are not disabled. Using raw .elements instead and filtering
    // out <fieldset>.
    var $settings = $($wrapper.find('.mw-rtrc-settings')[0].elements).filter(':input');

    opt = makeOpt();

    $settings.each(function (i, el) {
      var name = el.name;
      switch (name) {
        // RC
        case 'limit':
          opt.rc[name] = Number(el.value);
          break;
        case 'namespace':
        // Can be "0".
        // Value "" (all) is represented by undefined.
        // TODO: Turn this into a multi-select, the API supports it.
          opt.rc[name] = el.value.length ? Number(el.value) : undefined;
          break;
        case 'user':
        case 'start':
        case 'end':
        case 'tag':
          opt.rc[name] = el.value || undefined;
          break;
        case 'hideliu':
        case 'hidebots':
        case 'unpatrolled':
        case 'typeEdit':
        case 'typeNew':
          opt.rc[name] = el.checked;
          break;
        case 'dir':
          // There's more than 1 radio button with this name in this loop,
          // use the value of the first (and only) checked one.
          if (el.checked) {
            opt.rc[name] = el.value;
          }
          break;
        // APP
        case 'cvnDB':
        case 'ores':
        case 'massPatrol':
        case 'autoDiff':
          opt.app[name] = el.checked;
          break;
        case 'refresh':
          opt.app[name] = Number(el.value);
          break;
      }
    });

    if (!normaliseSettings(opt)) {
      fillSettingsForm(opt);
    }
  }

  function getPermalink () {
    var uri = new mw.Uri(mw.util.getUrl(conf.wgPageName));
    var reducedOpt = {};

    $.each(opt.rc, function (key, value) {
      if (defOpt.rc[key] !== value) {
        if (!reducedOpt.rc) {
          reducedOpt.rc = {};
        }
        reducedOpt.rc[key] = value;
      }
    });

    $.each(opt.app, function (key, value) {
      // Don't permalink MassPatrol (issue Krinkle/mw-rtrc-gadget#59)
      if (key !== 'massPatrol' && defOpt.app[key] !== value) {
        if (!reducedOpt.app) {
          reducedOpt.app = {};
        }
        reducedOpt.app[key] = value;
      }
    });

    reducedOpt = JSON.stringify(reducedOpt);

    uri.extend({
      opt: reducedOpt === '{}' ? '' : reducedOpt
    });

    return uri.toString();
  }

  function updateFeedNow () {
    $('#rc-options-pause').prop('checked', false);
    if (updateReq) {
      // Try to abort the current request
      updateReq.abort();
    }
    clearTimeout(updateFeedTimeout);
    return updateFeed();
  }

  /**
   * @param {jQuery} $element
   */
  function scrollIntoView ($element) {
    $element[0].scrollIntoView({ block: 'start', behavior: 'smooth' });
  }

  /**
   * @param {jQuery} $element
   */
  function scrollIntoViewIfNeeded ($element) {
    if ($element[0].scrollIntoViewIfNeeded) {
      $element[0].scrollIntoViewIfNeeded({ block: 'start', behavior: 'smooth' });
    } else {
      $element[0].scrollIntoView({ block: 'start', behavior: 'smooth' });
    }
  }

  // Read permalink into the program and reflect into settings form.
  function readPermalink () {
    var url = new mw.Uri();

    var newOpt;
    if (url.query.opt) {
      try {
        newOpt = JSON.parse(url.query.opt);
      } catch (e) {
        // Ignore
      }
    }
    if (newOpt) {
      // Rename values for old aliases
      for (var group in newOpt) {
        for (var oldKey in newOpt[group]) {
          var newKey = aliasOpt[oldKey];
          if (newKey && !Object.hasOwnProperty.call(newOpt[group], newKey)) {
            newOpt[group][newKey] = newOpt[group][oldKey];
            delete newOpt[group][oldKey];
          }
        }
      }

      if (newOpt.app) {
        // Don't permalink MassPatrol (issue Krinkle/mw-rtrc-gadget#59)
        delete newOpt.app.massPatrol;
      }
    }

    newOpt = $.extend(true, makeOpt(), newOpt);

    normaliseSettings(newOpt, 'quiet');
    fillSettingsForm(newOpt);

    opt = newOpt;
  }

  function getApiRcParams (rc) {
    var rcprop = [
      'flags',
      'timestamp',
      'user',
      'title',
      'parsedcomment',
      'sizes',
      'ids'
    ];
    var rcshow = [];
    var rctype = [];

    if (userHasPatrolRight) {
      rcprop.push('patrolled');
    }

    if (rc.hideliu) {
      rcshow.push('anon');
    }
    if (rc.hidebots) {
      rcshow.push('!bot');
    }
    if (rc.unpatrolled) {
      rcshow.push('!patrolled');
    }

    if (rc.typeEdit) {
      rctype.push('edit');
    }
    if (rc.typeNew) {
      rctype.push('new');
    }
    if (!rctype.length) {
      // Custom default instead of MediaWiki's default (in case both checkboxes were unchecked)
      rctype = ['edit', 'new'];
    }

    var params = {
      rcdir: rc.dir,
      rclimit: rc.limit,
      rcshow: rcshow.join('|'),
      rcprop: rcprop.join('|'),
      rctype: rctype.join('|')
    };

    if (rc.dir === 'older') {
      if (rc.end !== undefined) {
        params.rcstart = rc.end;
      }
      if (rc.start !== undefined) {
        params.rcend = rc.start;
      }
    } else if (rc.dir === 'newer') {
      if (rc.start !== undefined) {
        params.rcstart = rc.start;
      }
      if (rc.end !== undefined) {
        params.rcend = rc.end;
      }
    }

    if (rc.namespace !== undefined) {
      params.rcnamespace = rc.namespace;
    }

    if (rc.user !== undefined) {
      params.rcuser = rc.user;
    }

    if (rc.tag !== undefined) {
      params.rctag = rc.tag;
    }

    // params.titles: Title filter (rctitles) is no longer supported by MediaWiki,
    // see https://bugzilla.wikimedia.org/show_bug.cgi?id=12394#c5.

    return params;
  }

  // Called when the feed is regenerated before being inserted in the document
  function applyRtrcAnnotations ($feedContent) {
    // Re-apply item classes
    $feedContent.filter('.mw-rtrc-item').each(function () {
      var $el = $(this);
      var rcid = Number($el.data('rcid'));

      // Mark skipped and patrolled items as such
      if (skippedRCIDs.includes(rcid)) {
        $el.addClass('mw-rtrc-item-skipped');
      } else if (annotations.patrolled.has(rcid)) {
        $el.addClass('mw-rtrc-item-patrolled');
      } else if (rcid === currentDiffRcid) {
        $el.addClass('mw-rtrc-item-current');
      }
    });
  }

  function applyOresAnnotations ($feedContent) {
    if (!oresModel) {
      return $.Deferred().resolve();
    }

    // Find all revids names inside the feed
    var revids = $.map($feedContent.filter('.mw-rtrc-item'), function (node) {
      return $(node).attr('data-diff');
    });

    if (!revids.length) {
      return $.Deferred().resolve();
    }

    var fetchRevids = revids.filter(function (revid) {
      return !annotations.ores.has(revid);
    });

    var dAnnotations;
    if (!fetchRevids.length) {
      // No (new) revisions
      dAnnotations = $.Deferred().resolve(annotations.ores);
    } else {
      dAnnotations = $.ajax({
        url: oresApiUrl,
        data: {
          models: oresModel,
          // ORES v3 limits batches to 20 revisions.
          // We don't request multiple batches as this would delay the UI
          // too much. Fetching the first batch only, works well, because we
          // have a cache, and we refresh the feed every 5s.
          //
          // During each refresh, we will the fetch more scores for any newer
          // edits on top, and any older edits still in the list.
          revids: fetchRevids.slice(0, 20).join('|')
        },
        timeout: 10000,
        dataType: 'json',
        cache: true
      }).then(function (resp) {
        var scores = resp[conf.wgDBname].scores;
        for (var revid in scores) {
          const item = scores[revid][oresModel];
          if (item.error) {
            mw.log.warn('ORES API', item.error);
            continue;
          }
          annotations.ores.set(revid, item.score.probability.true);
        }
        annotationsCheck();
        return annotations.ores;
      });
    }

    return dAnnotations.then(function (ores) {
      // Loop through all revision ids
      revids.forEach(function (revid) {
        var score = ores.get(revid);
        // Only highlight high probability scores
        if (!score || score <= 0.45) {
          return;
        }
        var tooltip = msg('ores-damaging-probability', (100 * score).toFixed(0) + '%');

        // Add alert
        $feedContent
          .filter('.mw-rtrc-item[data-diff="' + Number(revid) + '"]')
          .addClass('mw-rtrc-item-alert mw-rtrc-item-alert-rev')
          .find('.mw-rtrc-meta')
          .prepend(
            $('<span>')
              .addClass('mw-rtrc-revscore')
              .attr('title', tooltip)
          );
      });
    });
  }

  function applyCvnAnnotations ($feedContent) {
    // Collect user names
    var users = [];
    $feedContent.filter('.mw-rtrc-item').each(function () {
      var user = $(this).attr('user');
      // Don't query the same user multiple times
      if (user && !users.includes(user)) {
        const cvnData = annotations.cvn.get(user);
        if (cvnData) {
          // Move to end of key list for LRU in annotationsCheck()
          annotations.cvn.delete(user);
          annotations.cvn.set(user, cvnData);
        } else {
          users.push(user);
        }
      }
    });

    var dAnnotations;
    if (!users.length) {
      // No (new) users
      dAnnotations = $.Deferred().resolve(annotations.cvn);
    } else {
      dAnnotations = $.ajax({
        url: cvnApiUrl,
        data: { users: users.join('|') },
        timeout: 2000,
        dataType: 'json',
        cache: true
      })
        .then(function (resp) {
          if (resp.users) {
            $.each(resp.users, function (name, user) {
              annotations.cvn.set(name, user);
            });
            annotationsCheck();
          }
          return annotations.cvn;
        });
    }

    return dAnnotations.then(function (cvn) {
      cvn.forEach(function (user, name) {
        var tooltip;

        // Only if blacklisted, otherwise don't highlight
        if (user.type === 'blacklist') {
          tooltip = '';

          if (user.comment) {
            tooltip += msg('cvn-reason') + ': ' + user.comment + '. ';
          } else {
            tooltip += msg('cvn-reason') + ': ' + msg('cvn-reason-empty');
          }

          if (user.adder) {
            tooltip += msg('cvn-adder') + ': ' + user.adder;
          } else {
            tooltip += msg('cvn-adder') + ': ' + msg('cvn-adder-empty');
          }

          // Add alert
          $feedContent
            .filter('.mw-rtrc-item')
            .filter(function () {
              return $(this).attr('user') === name;
            })
            .addClass('mw-rtrc-item-alert mw-rtrc-item-alert-user')
            .find('.mw-userlink')
            .attr('title', tooltip);
        }
      });
    });
  }

  /**
   * @param {Object} update
   * @param {jQuery} update.$feedContent
   * @param {string} update.rawHtml
   */
  function pushFeedContent (update) {
    $body.removeClass('placeholder');

    $feed.find('.mw-rtrc-feed-update').html(
      message('lastupdate-rc', new Date().toLocaleString()).escaped() +
      ' | <a href="' + mw.html.escape(getPermalink()) + '">' +
      message('permalink').escaped() +
      '</a>'
    );

    if (update.rawHtml !== prevFeedHtml) {
      prevFeedHtml = update.rawHtml;
      applyRtrcAnnotations(update.$feedContent);
      $feed.find('.mw-rtrc-feed-content').empty().append(update.$feedContent);
    }
  }

  function updateFeed () {
    if (updateReq) {
      updateReq.abort();
    }

    // Indicate updating
    $('#krRTRC_loader').show();

    // Download recent changes
    updateReq = $.ajax({
      url: apiUrl,
      dataType: 'json',
      data: $.extend(getApiRcParams(opt.rc), {
        format: 'json',
        action: 'query',
        list: 'recentchanges'
      })
    });
    // This waterfall flows in one of two ways:
    // - Everything casts to success and results in a UI update (maybe an error message),
    //   loading indicator hidden, and the next update scheduled.
    // - Request is aborted and nothing happens (instead, the final handling will
    //   be done by the new request).
    return updateReq.always(function () {
      updateReq = null;
    })
      .then(function onRcSuccess (data) {
        var feedContentHTML = '';

        if (data.error) {
          // Account doesn't have patrol flag
          if (data.error.code === 'rcpermissiondenied') {
            feedContentHTML += '<h3>Downloading recent changes failed</h3><p>Please untick the "Unpatrolled only"-checkbox or request the Patroller-right.</a>';

          // Other error
          } else {
            var client = $.client.profile();
            feedContentHTML += '<h3>Downloading recent changes failed</h3>' +
            '<p>Please check the settings above and try again. If you believe this is a bug, please <strong>' +
            '<a href="https://phabricator.wikimedia.org/maniphest/task/edit/form/1/?project=gadget-RTRC&description=' + encodeURIComponent('\n\n\n----' +
            '\npackage: mw-gadget-rtrc ' + appVersion +
            mw.format('\nbrowser: $1 $2 ($3)', client.name, client.version, client.platform)
            ) + '" target="_blank">let me know</a></strong>.';
          }
        } else {
          var recentchanges = data.query.recentchanges;

          if (recentchanges.length) {
            $.each(recentchanges, function (i, rc) {
              feedContentHTML += buildRcItem(rc);
            });
          } else {
            // Evserything is OK - no results
            feedContentHTML += '<strong><em>' + message('nomatches').escaped() + '</em></strong>';
          }

          // Reset day
          rcDayHeadPrev = undefined;
        }

        var $feedContent = $($.parseHTML(feedContentHTML));

        return $.when(
          opt.app.cvnDB && applyCvnAnnotations($feedContent),
          oresModel && opt.app.ores && applyOresAnnotations($feedContent)
        ).then(null, function () {
          // Ignore errors from annotation handlers
          return $.Deferred().resolve();
        }).then(function () {
          return {
            $feedContent,
            rawHtml: feedContentHTML
          };
        });
      }, function onRcError (jqXhr, textStatus) {
        if (textStatus === 'abort') {
          // No rendering
          return $.Deferred().reject();
        }
        var feedContentHTML = '<h3>Downloading recent changes failed</h3>';
        // Error is handled, continue to rendering.
        return {
          $feedContent: $(feedContentHTML),
          rawHtml: feedContentHTML
        };
      })
      .then(function (obj) {
        // Render
        pushFeedContent(obj);
      })
      .then(function () {
        $rcOptionsSubmit.prop('disabled', false).css('opacity', '1.0');

        // Schedule next update
        updateFeedTimeout = setTimeout(updateFeed, opt.app.refresh * 1000);
        $('#krRTRC_loader').hide();
      });
  }

  function nextDiff () {
    var $lis = $feed.find('.mw-rtrc-item:not(.mw-rtrc-item-current, .mw-rtrc-item-patrolled, .mw-rtrc-item-skipped)');
    $lis.eq(0).find('a.rcitemlink').click();
  }

  function wakeupMassPatrol (settingVal) {
    if (settingVal === true) {
      if (!currentDiff) {
        nextDiff();
      } else {
        $('.patrollink a').click();
      }
    }
  }

  // Build the main interface
  function buildInterface () {
    var fmNs = mw.config.get('wgFormattedNamespaces');

    var namespaceOptionsHtml = '<option value>' + mw.message('namespacesall').escaped() + '</option>';
    namespaceOptionsHtml += '<option value="0">' + mw.message('blanknamespace').escaped() + '</option>';

    for (var key in fmNs) {
      if (key > 0) {
        namespaceOptionsHtml += '<option value="' + key + '">' + fmNs[key] + '</option>';
      }
    }

    var tagOptionsHtml = '<option value selected>' + message('select-placeholder-none').escaped() + '</option>';
    for (var i = 0; i < rcTags.length; i++) {
      tagOptionsHtml += '<option value="' + mw.html.escape(rcTags[i]) + '">' + mw.html.escape(rcTags[i]) + '</option>';
    }

    $wrapper = $($.parseHTML(
      '<div class="mw-rtrc-wrapper">' +
      '<div class="mw-rtrc-head">' +
        message('title').escaped() + ' <small>(' + appVersion + ')</small>' +
        '<div class="mw-rtrc-head-links">' +
          (!mw.user.isAnon()
            ? ('<a target="_blank" href="' + mw.util.getUrl('Special:Log', { type: 'patrol', user: mw.user.getName(), subtype: 'patrol' }) + '">' +
              message('mypatrollog').escaped() +
            '</a>')
            : '') +
          '<a id="mw-rtrc-toggleHelp">' + message('help').escaped() + '</a>' +
        '</div>' +
      '</div>' +
      '<form id="krRTRC_RCOptions" class="mw-rtrc-settings mw-rtrc-nohelp make-switch"><fieldset>' +
        '<div class="panel-group">' +
          '<div class="panel">' +
            '<label class="head">' + message('filter').escaped() + '</label>' +
            '<div class="sub-panel">' +
              '<label>' +
                '<input type="checkbox" name="hideliu">' +
                ' ' + message('filter-hideliu').escaped() +
              '</label>' +
              '<br>' +
              '<label>' +
                '<input type="checkbox" name="hidebots">' +
                ' ' + message('filter-hidebots').escaped() +
              '</label>' +
            '</div>' +
            '<div class="sub-panel">' +
              '<label>' +
                '<input type="checkbox" name="unpatrolled">' +
                ' ' + message('filter-unpatrolled').escaped() +
              '</label>' +
              '<br>' +
              '<label>' +
                message('userfilter').escaped() +
                '<span section="Userfilter" class="helpicon"></span>: ' +
                '<input type="search" size="16" name="user">' +
              '</label>' +
            '</div>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' + message('type').escaped() + '</label>' +
            '<div class="sub-panel">' +
              '<label>' +
                '<input type="checkbox" name="typeEdit" checked>' +
                ' ' + message('typeEdit').escaped() +
              '</label>' +
              '<br>' +
              '<label>' +
                '<input type="checkbox" name="typeNew" checked>' +
                ' ' + message('typeNew').escaped() +
              '</label>' +
            '</div>' +
          '</div>' +
          '<div class="panel">' +
            '<label  class="head">' +
              mw.message('namespaces').escaped() +
              ' <br>' +
              '<select class="mw-rtrc-setting-select" name="namespace">' +
              namespaceOptionsHtml +
              '</select>' +
            '</label>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('timeframe').escaped() +
              '<span section="Timeframe" class="helpicon"></span>' +
            '</label>' +
            '<div class="sub-panel" style="text-align: right;">' +
              '<label>' +
                message('time-from').escaped() + ': ' +
                '<input type="text" size="16" placeholder="YYYYMMDDHHIISS" name="start">' +
              '</label>' +
              '<br>' +
              '<label>' +
                message('time-untill').escaped() + ': ' +
                '<input type="text" size="16" placeholder="YYYYMMDDHHIISS" name="end">' +
              '</label>' +
            '</div>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('order').escaped() +
              ' <br>' +
              '<span section="Order" class="helpicon"></span>' +
            '</label>' +
            '<div class="sub-panel">' +
              '<label>' +
                '<input type="radio" name="dir" value="newer">' +
                ' ' + message('asc').escaped() +
              '</label>' +
              '<br>' +
              '<label>' +
                '<input type="radio" name="dir" value="older" checked>' +
                ' ' + message('desc').escaped() +
              '</label>' +
            '</div>' +
          '</div>' +
          '<div class="panel">' +
            '<label for="mw-rtrc-settings-refresh" class="head">' +
              message('reload-interval').escaped() + '<br>' +
              '<span section="Reload_Interval" class="helpicon"></span>' +
            '</label>' +
            '<input type="number" value="3" min="0" max="99" size="2" id="mw-rtrc-settings-refresh" name="refresh">' +
          '</div>' +
          '<div class="panel panel-last">' +
            '<input class="button" type="button" id="RCOptions_submit" value="' + message('apply').escaped() + '">' +
          '</div>' +
        '</div>' +
        '<div class="panel-group panel-group-mini">' +
          '<div class="panel">' +
            '<label for="mw-rtrc-settings-limit" class="head">' + message('limit').escaped() + '</label>' +
            ' <select id="mw-rtrc-settings-limit" name="limit">' +
              '<option value="10">10</option>' +
              '<option value="25" selected>25</option>' +
              '<option value="50">50</option>' +
              '<option value="75">75</option>' +
              '<option value="100">100</option>' +
              '<option value="250">250</option>' +
              '<option value="500">500</option>' +
            '</select>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('tag').escaped() +
              ' <select class="mw-rtrc-setting-select" name="tag">' +
              tagOptionsHtml +
              '</select>' +
            '</label>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('cvn-scores').escaped() +
              '<span section="CVN_Scores" class="helpicon"></span>' +
              '<input type="checkbox" class="switch" name="cvnDB">' +
            '</label>' +
          '</div>' +
          (oresModel
            ? ('<div class="panel">' +
              '<label class="head">' +
                message('ores-scores').escaped() +
                '<span section="ORES_Scores" class="helpicon"></span>' +
                '<input type="checkbox" class="switch" name="ores">' +
              '</label>' +
            '</div>')
            : '') +
          '<div class="panel">' +
            '<label class="head">' +
              message('masspatrol').escaped() +
              '<span section="MassPatrol" class="helpicon"></span>' +
              '<input type="checkbox" class="switch" name="massPatrol">' +
            '</label>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('autodiff').escaped() +
              '<span section="AutoDiff" class="helpicon"></span>' +
              '<input type="checkbox" class="switch" name="autoDiff">' +
            '</label>' +
          '</div>' +
          '<div class="panel">' +
            '<label class="head">' +
              message('pause').escaped() +
              '<input class="switch" type="checkbox" id="rc-options-pause">' +
            '</label>' +
          '</div>' +
        '</div>' +
      '</fieldset></form>' +
      '<a name="krRTRC_DiffTop"></a>' +
      '<div class="mw-rtrc-diff mw-rtrc-diff-closed" id="krRTRC_DiffFrame"></div>' +
      '<div class="mw-rtrc-body placeholder">' +
        '<div class="mw-rtrc-feed">' +
          '<div class="mw-rtrc-feed-update"></div>' +
          '<div class="mw-rtrc-feed-content"></div>' +
        '</div>' +
        '<img src="' + ajaxLoaderUrl + '" id="krRTRC_loader" style="display: none;">' +
        '<div class="mw-rtrc-legend">' +
          message('legend').escaped() + ': ' +
          '<div class="mw-rtrc-item mw-rtrc-item-patrolled">' + mw.message('markedaspatrolled').escaped() + '</div>, ' +
          '<div class="mw-rtrc-item mw-rtrc-item-current">' + message('currentedit').escaped() + '</div>, ' +
          '<div class="mw-rtrc-item mw-rtrc-item-skipped">' + message('skippededit').escaped() + '</div>' +
        '</div>' +
      '</div>' +
      '<div style="clear: both;"></div>' +
      '<div class="mw-rtrc-foot">' +
        '<div class="plainlinks" style="text-align: right;">' +
          'Real-Time Recent Changes by ' +
          '<a href="https://meta.wikimedia.org/wiki/User:Krinkle">Krinkle</a>' +
          ' | <a href="' + docUrl + '">' + message('documentation').escaped() + '</a>' +
          ' | <a href="https://gerrit.wikimedia.org/g/mediawiki/gadgets/RTRC/+/master/CHANGELOG.md">' + message('changelog').escaped() + '</a>' +
          ' | <a href="https://phabricator.wikimedia.org/tag/gadget-rtrc/">' + message('feedback').escaped() + '</a>' +
        '</div>' +
      '</div>' +
    '</div>'
    ));

    // Add helper element for switch checkboxes
    $wrapper.find('input.switch').after('<div class="switched"></div>');

    $('#content').empty().append($wrapper);

    $body = $wrapper.find('.mw-rtrc-body');
    $feed = $body.find('.mw-rtrc-feed');
  }

  function annotationsCheck () {
    for (const cache of [
      annotations.patrolled,
      annotations.ores,
      annotations.cvn
    ]) {
      // For "patrolled" and "ores", given data per-edit and in chronological
      // order, we simply store data once and delete old keys (FIFO),
      // which is naturally equal to LRU, because old data is unused.
      //
      // For "cvn", data is per-user and old data may be frequently used.
      // We implement LRU tracking in applyCvnAnnotations().
      while (cache.size > ANNOTATION_CACHE_LIMIT) {
        cache.delete(cache.keys().next().value);
      }
    }
  }

  // Bind event hanlders in the user interface
  function bindInterface () {
    var api = new mw.Api();
    $rcOptionsSubmit = $('#RCOptions_submit');

    // Apply button
    $rcOptionsSubmit.on('click', function () {
      $rcOptionsSubmit.prop('disabled', true).css('opacity', '0.5');

      readSettingsForm();

      updateFeedNow().then(function () {
        wakeupMassPatrol(opt.app.massPatrol);
      });
      return false;
    });

    // Close Diff
    $wrapper.on('click', '#diffClose', function () {
      $('#krRTRC_DiffFrame').addClass('mw-rtrc-diff-closed');
      currentDiff = currentDiffRcid = false;
    });

    // Load diffview on (diff)-link click
    $feed.on('click', 'a.diff', function (e) {
      var $item = $(this).closest('.mw-rtrc-item').addClass('mw-rtrc-item-current');
      var title = $item.find('.mw-title').text();
      var href = $(this).attr('href');
      var $frame = $('#krRTRC_DiffFrame');

      $feed.find('.mw-rtrc-item-current').not($item).removeClass('mw-rtrc-item-current');

      currentDiff = Number($item.data('diff'));
      currentDiffRcid = Number($item.data('rcid'));

      $frame
        .addClass('mw-rtrc-diff-loading')
        // Reset class potentially added by a.newPage or diffClose
        .removeClass('mw-rtrc-diff-newpage mw-rtrc-diff-closed');

      $.ajax({
        url: mw.util.wikiScript(),
        dataType: 'html',
        data: {
          action: 'render',
          diff: currentDiff,
          diffonly: '1',
          uselang: conf.wgUserLanguage
        }
      }).then(function (data) {
        var skipButtonHtml, $diff;
        if (skippedRCIDs.includes(currentDiffRcid)) {
          skipButtonHtml = '<span class="tab"><a id="diffUnskip">' + message('unskip').escaped() + '</a></span>';
        } else {
          skipButtonHtml = '<span class="tab"><a id="diffSkip">' + message('skip').escaped() + '</a></span>';
        }

        $frame
          .html(data)
          .prepend(
            '<h3>' + mw.html.escape(title) + '</h3>' +
            '<div class="mw-rtrc-diff-tools">' +
              '<span class="tab"><a id="diffClose">' + message('close').escaped() + '</a></span>' +
              '<span class="tab"><a href="' + href + '" target="_blank" id="diffNewWindow">' + message('open-in-wiki').escaped() + '</a></span>' +
              (userHasPatrolRight
                ? '<span class="tab"><a onclick="(function(){ if($(\'.patrollink a\').length){ $(\'.patrollink a\').click(); } else { $(\'#diffSkip\').click(); } })();">[mark]</a></span>'
                : ''
              ) +
              '<span class="tab"><a id="diffNext">' + mw.message('next').escaped() + ' »</a></span>' +
              skipButtonHtml +
            '</div>'
          )
          .removeClass('mw-rtrc-diff-loading');

        if (opt.app.massPatrol) {
          $frame.find('.patrollink a').click();
        } else {
          $diff = $frame.find('table.diff');
          if ($diff.length) {
            mw.hook('wikipage.diff').fire($diff.eq(0));
          }
          // Only scroll up if the user scrolled down
          // Leave scroll offset unchanged otherwise
          scrollIntoViewIfNeeded($frame);
        }
      }).catch(function () {
        $frame
          .append('Loading diff failed.')
          .removeClass('mw-rtrc-diff-loading');
      });

      e.preventDefault();
    });

    $feed.on('click', 'a.newPage', function (e) {
      var $item = $(this).closest('.mw-rtrc-item').addClass('mw-rtrc-item-current');
      var title = $item.find('.mw-title').text();
      var href = $item.find('.mw-title').attr('href');
      var $frame = $('#krRTRC_DiffFrame');

      $feed.find('.mw-rtrc-item-current').not($item).removeClass('mw-rtrc-item-current');

      currentDiffRcid = Number($item.data('rcid'));

      $frame
        .addClass('mw-rtrc-diff-loading mw-rtrc-diff-newpage')
        .removeClass('mw-rtrc-diff-closed');

      $.ajax({
        url: href,
        dataType: 'html',
        data: {
          action: 'render',
          uselang: conf.wgUserLanguage
        }
      }).then(function (data) {
        var skipButtonHtml;
        if (skippedRCIDs.includes(currentDiffRcid)) {
          skipButtonHtml = '<span class="tab"><a id="diffUnskip">' + message('unskip').escaped() + '</a></span>';
        } else {
          skipButtonHtml = '<span class="tab"><a id="diffSkip">' + message('skip').escaped() + '</a></span>';
        }

        $frame
          .html(data)
          .prepend(
            '<h3>' + title + '</h3>' +
            '<div class="mw-rtrc-diff-tools">' +
              '<span class="tab"><a id="diffClose">' + message('close').escaped() + '</a></span>' +
              '<span class="tab"><a href="' + href + '" target="_blank" id="diffNewWindow">' + message('open-in-wiki').escaped() + '</a></span>' +
              '<span class="tab"><a onclick="$(\'.patrollink a\').click()">[' + message('mark').escaped() + ']</a></span>' +
              '<span class="tab"><a id="diffNext">' + mw.message('next').escaped() + ' »</a></span>' +
              skipButtonHtml +
            '</div>'
          )
          .removeClass('mw-rtrc-diff-loading');

        if (opt.app.massPatrol) {
          $frame.find('.patrollink a').click();
        }
      }).catch(function () {
        $frame
          .append('Loading diff failed.')
          .removeClass('mw-rtrc-diff-loading');
      });

      e.preventDefault();
    });

    // Mark as patrolled
    $wrapper.on('click', '.patrollink', function () {
      var $el = $(this);
      $el.find('a').text(mw.msg('markaspatrolleddiff') + '...');

      api.postWithToken('patrol', {
        action: 'patrol',
        rcid: currentDiffRcid
      }).then(function (data) {
        if (!data || data.error) {
          $el.empty().append(
            $('<span style="color: red;"></span>').text(mw.msg('markedaspatrollederror'))
          );
          mw.log('Patrol error:', data);
          return;
        }
        $el.empty().append(
          $('<span style="color: green;"></span>').text(mw.msg('markedaspatrolled'))
        );
        $feed.find('.mw-rtrc-item[data-rcid="' + currentDiffRcid + '"]').addClass('mw-rtrc-item-patrolled');

        // Feed refreshes may overlap with patrol actions, which can cause patrolled edits
        // to show up in an "Unpatrolled only" feed. This is make nextDiff() skip those.
        annotations.patrolled.set(currentDiffRcid, true);
        annotationsCheck();

        if (opt.app.autoDiff) {
          nextDiff();
        }
      }).catch(function () {
        $el.empty().append(
          $('<span style="color: red;"></span>').text(mw.msg('markedaspatrollederror'))
        );
      });

      // Prevent default and prevent further propagation,
      // so that the patrollink does not (also) open in a new window.
      return false;
    });

    // Trigger NextDiff
    $wrapper.on('click', '#diffNext', function () {
      nextDiff();
    });

    // SkipDiff
    $wrapper.on('click', '#diffSkip', function () {
      $feed.find('.mw-rtrc-item[data-rcid="' + currentDiffRcid + '"]').addClass('mw-rtrc-item-skipped');
      // Add to array, to re-add class after refresh
      skippedRCIDs.push(currentDiffRcid);
      nextDiff();
    });

    // UnskipDiff
    $wrapper.on('click', '#diffUnskip', function () {
      $feed.find('.mw-rtrc-item[data-rcid="' + currentDiffRcid + '"]').removeClass('mw-rtrc-item-skipped');
      // Remove from array, to no longer re-add class after refresh
      skippedRCIDs.splice(skippedRCIDs.indexOf(currentDiffRcid), 1);
    });

    // Show helpicons
    $('#mw-rtrc-toggleHelp').on('click', function (e) {
      e.preventDefault();
      $('#krRTRC_RCOptions').toggleClass('mw-rtrc-nohelp mw-rtrc-help');
    });

    // Link helpicons
    $('.mw-rtrc-settings .helpicon')
      .text('?')
      .attr('title', msg('helpicon-tooltip'))
      .on('click', function (e) {
        e.preventDefault();
        window.open(docUrl + '#' + $(this).attr('section'), '_blank');
      });

    // Mark as patrolled when rollbacking
    // Note: MediaWiki rollbacking already automatically patrols all reverted revisions.
    // But, by doing it again here saves a click for the AutoDiff-users to move to the
    // next diff.
    $wrapper.on('click', '.mw-rollback-link a', function () {
      $('.patrollink a').click();
      // Don't return false, we also let the click happen, which will go
      // to a new window.
    });

    // Any links from the wiki rendered in the diff, that don't have a special override
    // (like patrollink), should open in a new window.
    $wrapper.find('#krRTRC_DiffFrame').on('click', 'table.diff a[href]', function () {
      this.target = '_blank';
    });

    // Button: Pause
    $('#rc-options-pause').on('click', function () {
      if (!this.checked) {
        // Unpause
        updateFeedNow();
        return;
      }
      clearTimeout(updateFeedTimeout);
    });
  }

  function showUnsupported () {
    $('#content').empty().append(
      $('<p>').addClass('mw-message-box mw-message-box-error').text(
        'This program requires functionality not supported in this browser.'
      )
    );
  }

  /**
   * @param {string} [errMsg]
   */
  function showFail (errMsg) {
    $('#content').empty().append(
      $('<p>').addClass('mw-message-box mw-message-box-error').text(errMsg || 'An unexpected error occurred.')
    );
  }

  /**
   * Init functions
   * -------------------------------------------------
   */

  /**
   * Fetches all external data we need.
   *
   * This runs in parallel with loading of modules and i18n.
   *
   * @return {jQuery.Promise}
   */
  function initData () {
    var promises = [];

    // Get userrights
    promises.push(
      mw.loader.using('mediawiki.user').then(function () {
        return mw.user.getRights().then(function (rights) {
          if (rights.includes('patrol')) {
            userHasPatrolRight = true;
          }
        });
      })
    );

    // Get MediaWiki interface messages
    promises.push(
      mw.loader.using('mediawiki.api').then(function () {
        return new mw.Api().loadMessages([
          'blanknamespace',
          'contributions',
          'contribslink',
          'diff',
          'markaspatrolleddiff',
          'markedaspatrolled',
          'markedaspatrollederror',
          'namespaces',
          'namespacesall',
          'newpageletter',
          'next',
          'talkpagelinktext'
        ]);
      })
    );

    promises.push($.ajax({
      url: apiUrl,
      dataType: 'json',
      data: {
        format: 'json',
        action: 'query',
        list: 'tags',
        tgprop: 'displayname',
        tglimit: 'max'
      }
    }).then(function (resp) {
      rcTags = resp.query.tags.map((tag) => tag.name);
    }));

    promises.push($.ajax({
      url: apiUrl,
      dataType: 'json',
      data: {
        format: 'json',
        action: 'query',
        meta: 'siteinfo'
      }
    }).then(function (resp) {
      wikiTimeOffset = resp.query.general.timeoffset || 0;
    }));

    return $.when.apply(null, promises);
  }

  /**
   * @return {jQuery.Promise}
   */
  function init () {
    var navSupported = conf.skin === 'vector';

    // Transform title and navigation tabs
    document.title = 'RTRC: ' + conf.wgDBname;
    $(function () {
      $('#p-namespaces ul')
        .find('li.selected')
        .removeClass('new')
        .find('a')
        .text('RTRC');
    });

    var featureTest = !!(Date.parse);
    if (!featureTest) {
      $(showUnsupported);
      return;
    }

    $('html').addClass('mw-rtrc-available');

    var $navToggle;
    if (navSupported) {
      $('html').addClass('mw-rtrc-sidebar-toggleable');
      $(function () {
        $navToggle = $('<div>').addClass('mw-rtrc-navtoggle');
        $('body').append($('<div>').addClass('mw-rtrc-sidebar-cover'));
        $('#mw-panel')
          .append($navToggle)
          .on('mouseenter', function () {
            $('html').addClass('mw-rtrc-sidebar-on');
          })
          .on('mouseleave', function () {
            $('html').removeClass('mw-rtrc-sidebar-on');
          });
      });
    }

    var dModules = mw.loader.using([
      'jquery.client',
      'mediawiki.diff.styles',
      // mw-plusminus styles etc.
      'mediawiki.interface.helpers.styles',
      'mediawiki.special.changeslist',
      'mediawiki.jqueryMsg',
      'mediawiki.Uri',
      'mediawiki.user',
      'mediawiki.util',
      'mediawiki.api'
    ]);

    if (!mw.libs.getIntuition) {
      mw.libs.getIntuition = $.ajax({ url: intuitionLoadUrl, dataType: 'script', cache: true, timeout: 7000 });
    }

    var dOres = $.ajax({
      url: oresApiUrl,
      dataType: 'json',
      cache: true,
      timeout: 2000
    }).then(function (resp) {
      var models = resp[conf.wgDBname].models;
      if (models.damaging) {
        oresModel = 'damaging';
      } else if (models.reverted) {
        oresModel = 'reverted';
      }
    }, function () {
      // ORES has no models for this wiki, continue without
      return $.Deferred().resolve();
    });

    var dI18N = mw.libs.getIntuition
      .then(function () {
        return mw.libs.intuition.load('rtrc');
      })
      .then(function () {
        message = mw.libs.intuition.message.bind(null, 'rtrc');
        msg = mw.libs.intuition.msg.bind(null, 'rtrc');
      }, function () {
        // Ignore failure. RTRC should load even if Labs is down.
        // Fall back to displaying message keys.
        mw.messages.set('intuition-i18n-gone', '$1');
        message = function (key) {
          return mw.message('intuition-i18n-gone', key);
        };
        msg = function (key) {
          return key;
        };
        return $.Deferred().resolve();
      });

    $.when(initData(), dModules, dI18N, dOres, $.ready)
      .then(function () {
        if ($navToggle) {
          $navToggle.attr('title', msg('navtoggle-tooltip'));
        }

        // Create map of month names
        monthNames = msg('months').split(',');

        buildInterface();
        readPermalink();
        updateFeedNow();
        scrollIntoView($wrapper);
        bindInterface();

        rAF(function () {
          $('html').addClass('mw-rtrc-ready');
        });
      })
      .catch(showFail);
  }

  /**
   * Execution
   * -------------------------------------------------
   */

  // On every page
  $.when(mw.loader.using('mediawiki.util'), $.ready).then(function () {
    if (!$('#t-rtrc').length) {
      mw.util.addPortletLink(
        'p-tb',
        mw.util.getUrl('Special:BlankPage/RTRC'),
        'RTRC',
        't-rtrc',
        'Monitor and patrol recent changes in real-time',
        null,
        '#t-specialpages'
      );
    }
    if (conf.wgCanonicalSpecialPageName === 'Recentchanges' && !$('#ca-nstab-rtrc').length) {
      mw.util.addPortletLink(
        'p-namespaces',
        mw.util.getUrl('Special:BlankPage/RTRC'),
        'RTRC',
        'ca-nstab-rtrc',
        'Monitor and patrol recent changes in real-time'
      );
    }
  });

  // Initialise if in the right context
  if (
    (conf.wgTitle === 'Krinkle/RTRC' && conf.wgAction === 'view') ||
    (conf.wgCanonicalSpecialPageName === 'Blankpage' && conf.wgTitle.split('/', 2)[1] === 'RTRC')
  ) {
    init();
  }
}());