resources/src/mediawiki.rcfilters/mw.rcfilters.Controller.js

   1 ( function ( mw, $ ) {
   2         /* eslint no-underscore-dangle: "off" */
   3         /**
   4          * Controller for the filters in Recent Changes
   5          * @class
   6          *
   7          * @constructor
   8          * @param {mw.rcfilters.dm.FiltersViewModel} filtersModel Filters view model
   9          * @param {mw.rcfilters.dm.ChangesListViewModel} changesListModel Changes list view model
  10          * @param {mw.rcfilters.dm.SavedQueriesModel} savedQueriesModel Saved queries model
  11          * @param {Object} config Additional configuration
  12          * @cfg {string} savedQueriesPreferenceName Where to save the saved queries
  13          */
  14         mw.rcfilters.Controller = function MwRcfiltersController( filtersModel, changesListModel, savedQueriesModel, config ) {
  15                 this.filtersModel = filtersModel;
  16                 this.changesListModel = changesListModel;
  17                 this.savedQueriesModel = savedQueriesModel;
  18                 this.savedQueriesPreferenceName = config.savedQueriesPreferenceName;
  19
  20                 this.requestCounter = {};
  21                 this.baseFilterState = {};
  22                 this.uriProcessor = null;
  23                 this.initializing = false;
  24                 this.wereSavedQueriesSaved = false;
  25
  26                 this.prevLoggedItems = [];
  27
  28                 this.FILTER_CHANGE = 'filterChange';
  29                 this.SHOW_NEW_CHANGES = 'showNewChanges';
  30                 this.LIVE_UPDATE = 'liveUpdate';
  31         };
  32
  33         /* Initialization */
  34         OO.initClass( mw.rcfilters.Controller );
  35
  36         /**
  37          * Initialize the filter and parameter states
  38          *
  39          * @param {Array} filterStructure Filter definition and structure for the model
  40          * @param {Object} [namespaceStructure] Namespace definition
  41          * @param {Object} [tagList] Tag definition
  42          */
  43         mw.rcfilters.Controller.prototype.initialize = function ( filterStructure, namespaceStructure, tagList ) {
  44                 var parsedSavedQueries, pieces,
  45                         displayConfig = mw.config.get( 'StructuredChangeFiltersDisplayConfig' ),
  46                         defaultSavedQueryExists = mw.config.get( 'wgStructuredChangeFiltersDefaultSavedQueryExists' ),
  47                         controller = this,
  48                         views = {},
  49                         items = [],
  50                         uri = new mw.Uri();
  51
  52                 // Prepare views
  53                 if ( namespaceStructure ) {
  54                         items = [];
  55                         $.each( namespaceStructure, function ( namespaceID, label ) {
  56                                 // Build and clean up the individual namespace items definition
  57                                 items.push( {
  58                                         name: namespaceID,
  59                                         label: label || mw.msg( 'blanknamespace' ),
  60                                         description: '',
  61                                         identifiers: [
  62                                                 ( namespaceID < 0 || namespaceID % 2 === 0 ) ?
  63                                                         'subject' : 'talk'
  64                                         ],
  65                                         cssClass: 'mw-changeslist-ns-' + namespaceID
  66                                 } );
  67                         } );
  68
  69                         views.namespaces = {
  70                                 title: mw.msg( 'namespaces' ),
  71                                 trigger: ':',
  72                                 groups: [ {
  73                                         // Group definition (single group)
  74                                         name: 'namespace', // parameter name is singular
  75                                         type: 'string_options',
  76                                         title: mw.msg( 'namespaces' ),
  77                                         labelPrefixKey: { 'default': 'rcfilters-tag-prefix-namespace', inverted: 'rcfilters-tag-prefix-namespace-inverted' },
  78                                         separator: ';',
  79                                         fullCoverage: true,
  80                                         filters: items
  81                                 },
  82                                 {
  83                                         name: 'invertGroup',
  84                                         type: 'boolean',
  85                                         hidden: true,
  86                                         filters: [ {
  87                                                 name: 'invert',
  88                                                 'default': '0'
  89                                         } ]
  90                                 } ]
  91                         };
  92                 }
  93                 if ( tagList ) {
  94                         views.tags = {
  95                                 title: mw.msg( 'rcfilters-view-tags' ),
  96                                 trigger: '#',
  97                                 groups: [ {
  98                                         // Group definition (single group)
  99                                         name: 'tagfilter', // Parameter name
 100                                         type: 'string_options',
 101                                         title: 'rcfilters-view-tags', // Message key
 102                                         labelPrefixKey: 'rcfilters-tag-prefix-tags',
 103                                         separator: '|',
 104                                         fullCoverage: false,
 105                                         filters: tagList
 106                                 } ]
 107                         };
 108                 }
 109
 110                 // Add parameter range operations
 111                 views.range = {
 112                         groups: [
 113                                 {
 114                                         name: 'limit',
 115                                         type: 'single_option',
 116                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 117                                         hidden: true,
 118                                         allowArbitrary: true,
 119                                         validate: $.isNumeric,
 120                                         range: {
 121                                                 min: 0, // The server normalizes negative numbers to 0 results
 122                                                 max: 1000
 123                                         },
 124                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 125                                         'default': displayConfig.limitDefault,
 126                                         // Temporarily making this not sticky until we resolve the problem
 127                                         // with the misleading preference. Note that if this is to be permanent
 128                                         // we should remove all sticky behavior methods completely
 129                                         // See T172156
 130                                         // isSticky: true,
 131                                         excludedFromSavedQueries: true,
 132                                         filters: displayConfig.limitArray.map( function ( num ) {
 133                                                 return controller._createFilterDataFromNumber( num, num );
 134                                         } )
 135                                 },
 136                                 {
 137                                         name: 'days',
 138                                         type: 'single_option',
 139                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 140                                         hidden: true,
 141                                         allowArbitrary: true,
 142                                         validate: $.isNumeric,
 143                                         range: {
 144                                                 min: 0,
 145                                                 max: displayConfig.maxDays
 146                                         },
 147                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 148                                         numToLabelFunc: function ( i ) {
 149                                                 return Number( i ) < 1 ?
 150                                                         ( Number( i ) * 24 ).toFixed( 2 ) :
 151                                                         Number( i );
 152                                         },
 153                                         'default': displayConfig.daysDefault,
 154                                         // Temporarily making this not sticky while limit is not sticky, see above
 155                                         // isSticky: true,
 156                                         excludedFromSavedQueries: true,
 157                                         filters: [
 158                                                 // Hours (1, 2, 6, 12)
 159                                                 0.04166, 0.0833, 0.25, 0.5
 160                                         // Days
 161                                         ].concat( displayConfig.daysArray )
 162                                                 .map( function ( num ) {
 163                                                         return controller._createFilterDataFromNumber(
 164                                                                 num,
 165                                                                 // Convert fractions of days to number of hours for the labels
 166                                                                 num < 1 ? Math.round( num * 24 ) : num
 167                                                         );
 168                                                 } )
 169                                 }
 170                         ]
 171                 };
 172
 173                 views.display = {
 174                         groups: [
 175                                 {
 176                                         name: 'display',
 177                                         type: 'boolean',
 178                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 179                                         hidden: true,
 180                                         isSticky: true,
 181                                         filters: [
 182                                                 {
 183                                                         name: 'enhanced',
 184                                                         'default': String( mw.user.options.get( 'usenewrc', 0 ) )
 185                                                 }
 186                                         ]
 187                                 }
 188                         ]
 189                 };
 190
 191                 // Before we do anything, we need to see if we require additional items in the
 192                 // groups that have 'AllowArbitrary'. For the moment, those are only single_option
 193                 // groups; if we ever expand it, this might need further generalization:
 194                 $.each( views, function ( viewName, viewData ) {
 195                         viewData.groups.forEach( function ( groupData ) {
 196                                 var extraValues = [];
 197                                 if ( groupData.allowArbitrary ) {
 198                                         // If the value in the URI isn't in the group, add it
 199                                         if ( uri.query[ groupData.name ] !== undefined ) {
 200                                                 extraValues.push( uri.query[ groupData.name ] );
 201                                         }
 202                                         // If the default value isn't in the group, add it
 203                                         if ( groupData.default !== undefined ) {
 204                                                 extraValues.push( String( groupData.default ) );
 205                                         }
 206                                         controller.addNumberValuesToGroup( groupData, extraValues );
 207                                 }
 208                         } );
 209                 } );
 210
 211                 // Initialize the model
 212                 this.filtersModel.initializeFilters( filterStructure, views );
 213
 214                 this.uriProcessor = new mw.rcfilters.UriProcessor(
 215                         this.filtersModel
 216                 );
 217
 218                 if ( !mw.user.isAnon() ) {
 219                         try {
 220                                 parsedSavedQueries = JSON.parse( mw.user.options.get( this.savedQueriesPreferenceName ) || '{}' );
 221                         } catch ( err ) {
 222                                 parsedSavedQueries = {};
 223                         }
 224
 225                         // Initialize saved queries
 226                         this.savedQueriesModel.initialize( parsedSavedQueries );
 227                         if ( this.savedQueriesModel.isConverted() ) {
 228                                 // Since we know we converted, we're going to re-save
 229                                 // the queries so they are now migrated to the new format
 230                                 this._saveSavedQueries();
 231                         }
 232                 }
 233
 234                 // Check whether we need to load defaults.
 235                 // We do this by checking whether the current URI query
 236                 // contains any parameters recognized by the system.
 237                 // If it does, we load the given state.
 238                 // If it doesn't, we have no values at all, and we assume
 239                 // the user loads the base-page and we load defaults.
 240                 // Defaults should only be applied on load (if necessary)
 241                 // or on request
 242                 this.initializing = true;
 243
 244                 if ( defaultSavedQueryExists ) {
 245                         // This came from the server, meaning that we have a default
 246                         // saved query, but the server could not load it, probably because
 247                         // it was pre-conversion to the new format.
 248                         // We need to load this query again
 249                         this.applySavedQuery( this.savedQueriesModel.getDefault() );
 250                 } else {
 251                         // There are either recognized parameters in the URL
 252                         // or there are none, but there is also no default
 253                         // saved query (so defaults are from the backend)
 254                         // We want to update the state but not fetch results
 255                         // again
 256                         this.updateStateFromUrl( false );
 257
 258                         pieces = this._extractChangesListInfo( $( '#mw-content-text' ) );
 259
 260                         // Update the changes list with the existing data
 261                         // so it gets processed
 262                         this.changesListModel.update(
 263                                 pieces.changes,
 264                                 pieces.fieldset,
 265                                 pieces.noResultsDetails === 'NO_RESULTS_TIMEOUT',
 266                                 true // We're using existing DOM elements
 267                         );
 268                 }
 269
 270                 this.initializing = false;
 271                 this.switchView( 'default' );
 272
 273                 this.pollingRate = mw.config.get( 'StructuredChangeFiltersLiveUpdatePollingRate' );
 274                 if ( this.pollingRate ) {
 275                         this._scheduleLiveUpdate();
 276                 }
 277         };
 278
 279         /**
 280          * Extracts information from the changes list DOM
 281          *
 282          * @param {jQuery} $root Root DOM to find children from
 283          * @return {Object} Information about changes list
 284          * @return {Object|string} return.changes Changes list, or 'NO_RESULTS' if there are no results
 285          *   (either normally or as an error)
 286          * @return {string} [return.noResultsDetails] 'NO_RESULTS_NORMAL' for a normal 0-result set,
 287          *   'NO_RESULTS_TIMEOUT' for no results due to a timeout, or omitted for more than 0 results
 288          * @return {jQuery} return.fieldset Fieldset
 289          */
 290         mw.rcfilters.Controller.prototype._extractChangesListInfo = function ( $root ) {
 291                 var info, isTimeout,
 292                         $changesListContents = $root.find( '.mw-changeslist' ).first().contents(),
 293                         areResults = !!$changesListContents.length;
 294
 295                 info = {
 296                         changes: $changesListContents.length ? $changesListContents : 'NO_RESULTS',
 297                         fieldset: $root.find( 'fieldset.cloptions' ).first()
 298                 };
 299
 300                 if ( !areResults ) {
 301                         isTimeout = !!$root.find( '.mw-changeslist-timeout' ).length;
 302                         info.noResultsDetails = isTimeout ? 'NO_RESULTS_TIMEOUT' : 'NO_RESULTS_NORMAL';
 303                 }
 304
 305                 return info;
 306         };
 307
 308         /**
 309          * Create filter data from a number, for the filters that are numerical value
 310          *
 311          * @param {Number} num Number
 312          * @param {Number} numForDisplay Number for the label
 313          * @return {Object} Filter data
 314          */
 315         mw.rcfilters.Controller.prototype._createFilterDataFromNumber = function ( num, numForDisplay ) {
 316                 return {
 317                         name: String( num ),
 318                         label: mw.language.convertNumber( numForDisplay )
 319                 };
 320         };
 321
 322         /**
 323          * Add an arbitrary values to groups that allow arbitrary values
 324          *
 325          * @param {Object} groupData Group data
 326          * @param {string|string[]} arbitraryValues An array of arbitrary values to add to the group
 327          */
 328         mw.rcfilters.Controller.prototype.addNumberValuesToGroup = function ( groupData, arbitraryValues ) {
 329                 var controller = this,
 330                         normalizeWithinRange = function ( range, val ) {
 331                                 if ( val < range.min ) {
 332                                         return range.min; // Min
 333                                 } else if ( val >= range.max ) {
 334                                         return range.max; // Max
 335                                 }
 336                                 return val;
 337                         };
 338
 339                 arbitraryValues = Array.isArray( arbitraryValues ) ? arbitraryValues : [ arbitraryValues ];
 340
 341                 // Normalize the arbitrary values and the default value for a range
 342                 if ( groupData.range ) {
 343                         arbitraryValues = arbitraryValues.map( function ( val ) {
 344                                 return normalizeWithinRange( groupData.range, val );
 345                         } );
 346
 347                         // Normalize the default, since that's user defined
 348                         if ( groupData.default !== undefined ) {
 349                                 groupData.default = String( normalizeWithinRange( groupData.range, groupData.default ) );
 350                         }
 351                 }
 352
 353                 // This is only true for single_option group
 354                 // We assume these are the only groups that will allow for
 355                 // arbitrary, since it doesn't make any sense for the other
 356                 // groups.
 357                 arbitraryValues.forEach( function ( val ) {
 358                         if (
 359                                 // If the group allows for arbitrary data
 360                                 groupData.allowArbitrary &&
 361                                 // and it is single_option (or string_options, but we
 362                                 // don't have cases of those yet, nor do we plan to)
 363                                 groupData.type === 'single_option' &&
 364                                 // and, if there is a validate method and it passes on
 365                                 // the data
 366                                 ( !groupData.validate || groupData.validate( val ) ) &&
 367                                 // but if that value isn't already in the definition
 368                                 groupData.filters
 369                                         .map( function ( filterData ) {
 370                                                 return String( filterData.name );
 371                                         } )
 372                                         .indexOf( String( val ) ) === -1
 373                         ) {
 374                                 // Add the filter information
 375                                 groupData.filters.push( controller._createFilterDataFromNumber(
 376                                         val,
 377                                         groupData.numToLabelFunc ?
 378                                                 groupData.numToLabelFunc( val ) :
 379                                                 val
 380                                 ) );
 381
 382                                 // If there's a sort function set up, re-sort the values
 383                                 if ( groupData.sortFunc ) {
 384                                         groupData.filters.sort( groupData.sortFunc );
 385                                 }
 386                         }
 387                 } );
 388         };
 389
 390         /**
 391          * Switch the view of the filters model
 392          *
 393          * @param {string} view Requested view
 394          */
 395         mw.rcfilters.Controller.prototype.switchView = function ( view ) {
 396                 this.filtersModel.switchView( view );
 397         };
 398
 399         /**
 400          * Reset to default filters
 401          */
 402         mw.rcfilters.Controller.prototype.resetToDefaults = function () {
 403                 if ( this.applyParamChange( this._getDefaultParams() ) ) {
 404                         // Only update the changes list if there was a change to actual filters
 405                         this.updateChangesList();
 406                 }
 407         };
 408
 409         /**
 410          * Check whether the default values of the filters are all false.
 411          *
 412          * @return {boolean} Defaults are all false
 413          */
 414         mw.rcfilters.Controller.prototype.areDefaultsEmpty = function () {
 415                 return $.isEmptyObject( this._getDefaultParams( true ) );
 416         };
 417
 418         /**
 419          * Empty all selected filters
 420          */
 421         mw.rcfilters.Controller.prototype.emptyFilters = function () {
 422                 var highlightedFilterNames = this.filtersModel.getHighlightedItems()
 423                         .map( function ( filterItem ) { return { name: filterItem.getName() }; } );
 424
 425                 if ( this.applyParamChange( {} ) ) {
 426                         // Only update the changes list if there was a change to actual filters
 427                         this.updateChangesList();
 428                 }
 429
 430                 if ( highlightedFilterNames ) {
 431                         this._trackHighlight( 'clearAll', highlightedFilterNames );
 432                 }
 433         };
 434
 435         /**
 436          * Update the selected state of a filter
 437          *
 438          * @param {string} filterName Filter name
 439          * @param {boolean} [isSelected] Filter selected state
 440          */
 441         mw.rcfilters.Controller.prototype.toggleFilterSelect = function ( filterName, isSelected ) {
 442                 var filterItem = this.filtersModel.getItemByName( filterName );
 443
 444                 if ( !filterItem ) {
 445                         // If no filter was found, break
 446                         return;
 447                 }
 448
 449                 isSelected = isSelected === undefined ? !filterItem.isSelected() : isSelected;
 450
 451                 if ( filterItem.isSelected() !== isSelected ) {
 452                         this.filtersModel.toggleFilterSelected( filterName, isSelected );
 453
 454                         this.updateChangesList();
 455
 456                         // Check filter interactions
 457                         this.filtersModel.reassessFilterInteractions( filterItem );
 458                 }
 459         };
 460
 461         /**
 462          * Clear both highlight and selection of a filter
 463          *
 464          * @param {string} filterName Name of the filter item
 465          */
 466         mw.rcfilters.Controller.prototype.clearFilter = function ( filterName ) {
 467                 var filterItem = this.filtersModel.getItemByName( filterName ),
 468                         isHighlighted = filterItem.isHighlighted(),
 469                         isSelected = filterItem.isSelected();
 470
 471                 if ( isSelected || isHighlighted ) {
 472                         this.filtersModel.clearHighlightColor( filterName );
 473                         this.filtersModel.toggleFilterSelected( filterName, false );
 474
 475                         if ( isSelected ) {
 476                                 // Only update the changes list if the filter changed
 477                                 // its selection state. If it only changed its highlight
 478                                 // then don't reload
 479                                 this.updateChangesList();
 480                         }
 481
 482                         this.filtersModel.reassessFilterInteractions( filterItem );
 483
 484                         // Log filter grouping
 485                         this.trackFilterGroupings( 'removefilter' );
 486                 }
 487
 488                 if ( isHighlighted ) {
 489                         this._trackHighlight( 'clear', filterName );
 490                 }
 491         };
 492
 493         /**
 494          * Toggle the highlight feature on and off
 495          */
 496         mw.rcfilters.Controller.prototype.toggleHighlight = function () {
 497                 this.filtersModel.toggleHighlight();
 498                 this.uriProcessor.updateURL();
 499
 500                 if ( this.filtersModel.isHighlightEnabled() ) {
 501                         mw.hook( 'RcFilters.highlight.enable' ).fire();
 502                 }
 503         };
 504
 505         /**
 506          * Toggle the namespaces inverted feature on and off
 507          */
 508         mw.rcfilters.Controller.prototype.toggleInvertedNamespaces = function () {
 509                 this.filtersModel.toggleInvertedNamespaces();
 510
 511                 if (
 512                         this.filtersModel.getFiltersByView( 'namespaces' ).filter(
 513                                 function ( filterItem ) { return filterItem.isSelected(); }
 514                         ).length
 515                 ) {
 516                         // Only re-fetch results if there are namespace items that are actually selected
 517                         this.updateChangesList();
 518                 }
 519         };
 520
 521         /**
 522          * Set the highlight color for a filter item
 523          *
 524          * @param {string} filterName Name of the filter item
 525          * @param {string} color Selected color
 526          */
 527         mw.rcfilters.Controller.prototype.setHighlightColor = function ( filterName, color ) {
 528                 this.filtersModel.setHighlightColor( filterName, color );
 529                 this.uriProcessor.updateURL();
 530                 this._trackHighlight( 'set', { name: filterName, color: color } );
 531         };
 532
 533         /**
 534          * Clear highlight for a filter item
 535          *
 536          * @param {string} filterName Name of the filter item
 537          */
 538         mw.rcfilters.Controller.prototype.clearHighlightColor = function ( filterName ) {
 539                 this.filtersModel.clearHighlightColor( filterName );
 540                 this.uriProcessor.updateURL();
 541                 this._trackHighlight( 'clear', filterName );
 542         };
 543
 544         /**
 545          * Enable or disable live updates.
 546          * @param {boolean} enable True to enable, false to disable
 547          */
 548         mw.rcfilters.Controller.prototype.toggleLiveUpdate = function ( enable ) {
 549                 this.changesListModel.toggleLiveUpdate( enable );
 550                 if ( this.changesListModel.getLiveUpdate() && this.changesListModel.getNewChangesExist() ) {
 551                         this.updateChangesList( null, this.LIVE_UPDATE );
 552                 }
 553         };
 554
 555         /**
 556          * Set a timeout for the next live update.
 557          * @private
 558          */
 559         mw.rcfilters.Controller.prototype._scheduleLiveUpdate = function () {
 560                 setTimeout( this._doLiveUpdate.bind( this ), this.pollingRate * 1000 );
 561         };
 562
 563         /**
 564          * Perform a live update.
 565          * @private
 566          */
 567         mw.rcfilters.Controller.prototype._doLiveUpdate = function () {
 568                 if ( !this._shouldCheckForNewChanges() ) {
 569                         // skip this turn and check back later
 570                         this._scheduleLiveUpdate();
 571                         return;
 572                 }
 573
 574                 this._checkForNewChanges()
 575                         .then( function ( newChanges ) {
 576                                 if ( !this._shouldCheckForNewChanges() ) {
 577                                         // by the time the response is received,
 578                                         // it may not be appropriate anymore
 579                                         return;
 580                                 }
 581
 582                                 if ( newChanges ) {
 583                                         if ( this.changesListModel.getLiveUpdate() ) {
 584                                                 return this.updateChangesList( null, this.LIVE_UPDATE );
 585                                         } else {
 586                                                 this.changesListModel.setNewChangesExist( true );
 587                                         }
 588                                 }
 589                         }.bind( this ) )
 590                         .always( this._scheduleLiveUpdate.bind( this ) );
 591         };
 592
 593         /**
 594          * @return {boolean} It's appropriate to check for new changes now
 595          * @private
 596          */
 597         mw.rcfilters.Controller.prototype._shouldCheckForNewChanges = function () {
 598                 return !document.hidden &&
 599                         !this.filtersModel.hasConflict() &&
 600                         !this.changesListModel.getNewChangesExist() &&
 601                         !this.updatingChangesList &&
 602                         this.changesListModel.getNextFrom();
 603         };
 604
 605         /**
 606          * Check if new changes, newer than those currently shown, are available
 607          *
 608          * @return {jQuery.Promise} Promise object that resolves with a bool
 609          *      specifying if there are new changes or not
 610          *
 611          * @private
 612          */
 613         mw.rcfilters.Controller.prototype._checkForNewChanges = function () {
 614                 var params = {
 615                         limit: 1,
 616                         peek: 1, // bypasses ChangesList specific UI
 617                         from: this.changesListModel.getNextFrom()
 618                 };
 619                 return this._queryChangesList( 'liveUpdate', params ).then(
 620                         function ( data ) {
 621                                 // no result is 204 with the 'peek' param
 622                                 return data.status === 200;
 623                         }
 624                 );
 625         };
 626
 627         /**
 628          * Show the new changes
 629          *
 630          * @return {jQuery.Promise} Promise object that resolves after
 631          * fetching and showing the new changes
 632          */
 633         mw.rcfilters.Controller.prototype.showNewChanges = function () {
 634                 return this.updateChangesList( null, this.SHOW_NEW_CHANGES );
 635         };
 636
 637         /**
 638          * Save the current model state as a saved query
 639          *
 640          * @param {string} [label] Label of the saved query
 641          * @param {boolean} [setAsDefault=false] This query should be set as the default
 642          */
 643         mw.rcfilters.Controller.prototype.saveCurrentQuery = function ( label, setAsDefault ) {
 644                 // Add item
 645                 this.savedQueriesModel.addNewQuery(
 646                         label || mw.msg( 'rcfilters-savedqueries-defaultlabel' ),
 647                         this.filtersModel.getCurrentParameterState( true ),
 648                         setAsDefault
 649                 );
 650
 651                 // Save item
 652                 this._saveSavedQueries();
 653         };
 654
 655         /**
 656          * Remove a saved query
 657          *
 658          * @param {string} queryID Query id
 659          */
 660         mw.rcfilters.Controller.prototype.removeSavedQuery = function ( queryID ) {
 661                 this.savedQueriesModel.removeQuery( queryID );
 662
 663                 this._saveSavedQueries();
 664         };
 665
 666         /**
 667          * Rename a saved query
 668          *
 669          * @param {string} queryID Query id
 670          * @param {string} newLabel New label for the query
 671          */
 672         mw.rcfilters.Controller.prototype.renameSavedQuery = function ( queryID, newLabel ) {
 673                 var queryItem = this.savedQueriesModel.getItemByID( queryID );
 674
 675                 if ( queryItem ) {
 676                         queryItem.updateLabel( newLabel );
 677                 }
 678                 this._saveSavedQueries();
 679         };
 680
 681         /**
 682          * Set a saved query as default
 683          *
 684          * @param {string} queryID Query Id. If null is given, default
 685          *  query is reset.
 686          */
 687         mw.rcfilters.Controller.prototype.setDefaultSavedQuery = function ( queryID ) {
 688                 this.savedQueriesModel.setDefault( queryID );
 689                 this._saveSavedQueries();
 690         };
 691
 692         /**
 693          * Load a saved query
 694          *
 695          * @param {string} queryID Query id
 696          */
 697         mw.rcfilters.Controller.prototype.applySavedQuery = function ( queryID ) {
 698                 var currentMatchingQuery,
 699                         params = this.savedQueriesModel.getItemParams( queryID );
 700
 701                 currentMatchingQuery = this.findQueryMatchingCurrentState();
 702
 703                 if (
 704                         currentMatchingQuery &&
 705                         currentMatchingQuery.getID() === queryID
 706                 ) {
 707                         // If the query we want to load is the one that is already
 708                         // loaded, don't reload it
 709                         return;
 710                 }
 711
 712                 if ( this.applyParamChange( params ) ) {
 713                         // Update changes list only if there was a difference in filter selection
 714                         this.updateChangesList();
 715                 }
 716
 717                 // Log filter grouping
 718                 this.trackFilterGroupings( 'savedfilters' );
 719         };
 720
 721         /**
 722          * Check whether the current filter and highlight state exists
 723          * in the saved queries model.
 724          *
 725          * @return {mw.rcfilters.dm.SavedQueryItemModel} Matching item model
 726          */
 727         mw.rcfilters.Controller.prototype.findQueryMatchingCurrentState = function () {
 728                 return this.savedQueriesModel.findMatchingQuery(
 729                         this.filtersModel.getCurrentParameterState( true )
 730                 );
 731         };
 732
 733         /**
 734          * Save the current state of the saved queries model with all
 735          * query item representation in the user settings.
 736          */
 737         mw.rcfilters.Controller.prototype._saveSavedQueries = function () {
 738                 var stringified, oldPrefValue,
 739                         backupPrefName = this.savedQueriesPreferenceName + '-versionbackup',
 740                         state = this.savedQueriesModel.getState();
 741
 742                 // Stringify state
 743                 stringified = JSON.stringify( state );
 744
 745                 if ( $.byteLength( stringified ) > 65535 ) {
 746                         // Sanity check, since the preference can only hold that.
 747                         return;
 748                 }
 749
 750                 if ( !this.wereSavedQueriesSaved && this.savedQueriesModel.isConverted() ) {
 751                         // The queries were converted from the previous version
 752                         // Keep the old string in the [prefname]-versionbackup
 753                         oldPrefValue = mw.user.options.get( this.savedQueriesPreferenceName );
 754
 755                         // Save the old preference in the backup preference
 756                         new mw.Api().saveOption( backupPrefName, oldPrefValue );
 757                         // Update the preference for this session
 758                         mw.user.options.set( backupPrefName, oldPrefValue );
 759                 }
 760
 761                 // Save the preference
 762                 new mw.Api().saveOption( this.savedQueriesPreferenceName, stringified );
 763                 // Update the preference for this session
 764                 mw.user.options.set( this.savedQueriesPreferenceName, stringified );
 765
 766                 // Tag as already saved so we don't do this again
 767                 this.wereSavedQueriesSaved = true;
 768         };
 769
 770         /**
 771          * Update sticky preferences with current model state
 772          */
 773         mw.rcfilters.Controller.prototype.updateStickyPreferences = function () {
 774                 // Update default sticky values with selected, whether they came from
 775                 // the initial defaults or from the URL value that is being normalized
 776                 this.updateDaysDefault( this.filtersModel.getGroup( 'days' ).getSelectedItems()[ 0 ].getParamName() );
 777                 this.updateLimitDefault( this.filtersModel.getGroup( 'limit' ).getSelectedItems()[ 0 ].getParamName() );
 778
 779                 // TODO: Make these automatic by having the model go over sticky
 780                 // items and update their default values automatically
 781         };
 782
 783         /**
 784          * Update the limit default value
 785          *
 786          * param {number} newValue New value
 787          */
 788         mw.rcfilters.Controller.prototype.updateLimitDefault = function ( /* newValue */ ) {
 789                 // HACK: Temporarily remove this from being sticky
 790                 // See T172156
 791
 792                 /*
 793                 if ( !$.isNumeric( newValue ) ) {
 794                         return;
 795                 }
 796
 797                 newValue = Number( newValue );
 798
 799                 if ( mw.user.options.get( 'rcfilters-rclimit' ) !== newValue ) {
 800                         // Save the preference
 801                         new mw.Api().saveOption( 'rcfilters-rclimit', newValue );
 802                         // Update the preference for this session
 803                         mw.user.options.set( 'rcfilters-rclimit', newValue );
 804                 }
 805                 */
 806                 return;
 807         };
 808
 809         /**
 810          * Update the days default value
 811          *
 812          * param {number} newValue New value
 813          */
 814         mw.rcfilters.Controller.prototype.updateDaysDefault = function ( /* newValue */ ) {
 815                 // HACK: Temporarily remove this from being sticky
 816                 // See T172156
 817
 818                 /*
 819                 if ( !$.isNumeric( newValue ) ) {
 820                         return;
 821                 }
 822
 823                 newValue = Number( newValue );
 824
 825                 if ( mw.user.options.get( 'rcdays' ) !== newValue ) {
 826                         // Save the preference
 827                         new mw.Api().saveOption( 'rcdays', newValue );
 828                         // Update the preference for this session
 829                         mw.user.options.set( 'rcdays', newValue );
 830                 }
 831                 */
 832                 return;
 833         };
 834
 835         /**
 836          * Update the group by page default value
 837          *
 838          * @param {number} newValue New value
 839          */
 840         mw.rcfilters.Controller.prototype.updateGroupByPageDefault = function ( newValue ) {
 841                 if ( !$.isNumeric( newValue ) ) {
 842                         return;
 843                 }
 844
 845                 newValue = Number( newValue );
 846
 847                 if ( mw.user.options.get( 'usenewrc' ) !== newValue ) {
 848                         // Save the preference
 849                         new mw.Api().saveOption( 'usenewrc', newValue );
 850                         // Update the preference for this session
 851                         mw.user.options.set( 'usenewrc', newValue );
 852                 }
 853         };
 854
 855         /**
 856          * Synchronize the URL with the current state of the filters
 857          * without adding an history entry.
 858          */
 859         mw.rcfilters.Controller.prototype.replaceUrl = function () {
 860                 this.uriProcessor.updateURL();
 861         };
 862
 863         /**
 864          * Update filter state (selection and highlighting) based
 865          * on current URL values.
 866          *
 867          * @param {boolean} [fetchChangesList=true] Fetch new results into the changes
 868          *  list based on the updated model.
 869          */
 870         mw.rcfilters.Controller.prototype.updateStateFromUrl = function ( fetchChangesList ) {
 871                 fetchChangesList = fetchChangesList === undefined ? true : !!fetchChangesList;
 872
 873                 this.uriProcessor.updateModelBasedOnQuery( new mw.Uri().query );
 874
 875                 // Update the sticky preferences, in case we received a value
 876                 // from the URL
 877                 this.updateStickyPreferences();
 878
 879                 // Only update and fetch new results if it is requested
 880                 if ( fetchChangesList ) {
 881                         this.updateChangesList();
 882                 }
 883         };
 884
 885         /**
 886          * Update the list of changes and notify the model
 887          *
 888          * @param {Object} [params] Extra parameters to add to the API call
 889          * @param {string} [updateMode='filterChange'] One of 'filterChange', 'liveUpdate', 'showNewChanges', 'markSeen'
 890          * @return {jQuery.Promise} Promise that is resolved when the update is complete
 891          */
 892         mw.rcfilters.Controller.prototype.updateChangesList = function ( params, updateMode ) {
 893                 updateMode = updateMode === undefined ? this.FILTER_CHANGE : updateMode;
 894
 895                 if ( updateMode === this.FILTER_CHANGE ) {
 896                         this.uriProcessor.updateURL( params );
 897                 }
 898                 if ( updateMode === this.FILTER_CHANGE || updateMode === this.SHOW_NEW_CHANGES ) {
 899                         this.changesListModel.invalidate();
 900                 }
 901                 this.changesListModel.setNewChangesExist( false );
 902                 this.updatingChangesList = true;
 903                 return this._fetchChangesList()
 904                         .then(
 905                                 // Success
 906                                 function ( pieces ) {
 907                                         var $changesListContent = pieces.changes,
 908                                                 $fieldset = pieces.fieldset;
 909                                         this.changesListModel.update(
 910                                                 $changesListContent,
 911                                                 $fieldset,
 912                                                 pieces.noResultsDetails,
 913                                                 false,
 914                                                 // separator between old and new changes
 915                                                 updateMode === this.SHOW_NEW_CHANGES || updateMode === this.LIVE_UPDATE
 916                                         );
 917                                 }.bind( this )
 918                                 // Do nothing for failure
 919                         )
 920                         .always( function () {
 921                                 this.updatingChangesList = false;
 922                         }.bind( this ) );
 923         };
 924
 925         /**
 926          * Get an object representing the default parameter state, whether
 927          * it is from the model defaults or from the saved queries.
 928          *
 929          * @param {boolean} [excludeHiddenParams] Exclude hidden and sticky params
 930          * @return {Object} Default parameters
 931          */
 932         mw.rcfilters.Controller.prototype._getDefaultParams = function ( excludeHiddenParams ) {
 933                 if ( this.savedQueriesModel.getDefault() ) {
 934                         return this.savedQueriesModel.getDefaultParams( excludeHiddenParams );
 935                 } else {
 936                         return this.filtersModel.getDefaultParams( excludeHiddenParams );
 937                 }
 938         };
 939
 940         /**
 941          * Query the list of changes from the server for the current filters
 942          *
 943          * @param {string} counterId Id for this request. To allow concurrent requests
 944          *  not to invalidate each other.
 945          * @param {Object} [params={}] Parameters to add to the query
 946          *
 947          * @return {jQuery.Promise} Promise object resolved with { content, status }
 948          */
 949         mw.rcfilters.Controller.prototype._queryChangesList = function ( counterId, params ) {
 950                 var uri = this.uriProcessor.getUpdatedUri(),
 951                         stickyParams = this.filtersModel.getStickyParamsValues(),
 952                         requestId,
 953                         latestRequest;
 954
 955                 params = params || {};
 956                 params.action = 'render'; // bypasses MW chrome
 957
 958                 uri.extend( params );
 959
 960                 this.requestCounter[ counterId ] = this.requestCounter[ counterId ] || 0;
 961                 requestId = ++this.requestCounter[ counterId ];
 962                 latestRequest = function () {
 963                         return requestId === this.requestCounter[ counterId ];
 964                 }.bind( this );
 965
 966                 // Sticky parameters override the URL params
 967                 // this is to make sure that whether we represent
 968                 // the sticky params in the URL or not (they may
 969                 // be normalized out) the sticky parameters are
 970                 // always being sent to the server with their
 971                 // current/default values
 972                 uri.extend( stickyParams );
 973
 974                 return $.ajax( uri.toString(), { contentType: 'html' } )
 975                         .then(
 976                                 function ( content, message, jqXHR ) {
 977                                         if ( !latestRequest() ) {
 978                                                 return $.Deferred().reject();
 979                                         }
 980                                         return {
 981                                                 content: content,
 982                                                 status: jqXHR.status
 983                                         };
 984                                 },
 985                                 // RC returns 404 when there is no results
 986                                 function ( jqXHR ) {
 987                                         if ( latestRequest() ) {
 988                                                 return $.Deferred().resolve(
 989                                                         {
 990                                                                 content: jqXHR.responseText,
 991                                                                 status: jqXHR.status
 992                                                         }
 993                                                 ).promise();
 994                                         }
 995                                 }
 996                         );
 997         };
 998
 999         /**
1000          * Fetch the list of changes from the server for the current filters
1001          *
1002          * @return {jQuery.Promise} Promise object that will resolve with the changes list
1003          *  and the fieldset.
1004          */
1005         mw.rcfilters.Controller.prototype._fetchChangesList = function () {
1006                 return this._queryChangesList( 'updateChangesList' )
1007                         .then(
1008                                 function ( data ) {
1009                                         var $parsed;
1010
1011                                         // Status code 0 is not HTTP status code,
1012                                         // but is valid value of XMLHttpRequest status.
1013                                         // It is used for variety of network errors, for example
1014                                         // when an AJAX call was cancelled before getting the response
1015                                         if ( data && data.status === 0 ) {
1016                                                 return {
1017                                                         changes: 'NO_RESULTS',
1018                                                         // We need empty result set, to avoid exceptions because of undefined value
1019                                                         fieldset: $( [] ),
1020                                                         noResultsDetails: 'NO_RESULTS_NETWORK_ERROR'
1021                                                 };
1022                                         }
1023
1024                                         $parsed = $( '<div>' ).append( $( $.parseHTML( data.content ) ) );
1025
1026                                         return this._extractChangesListInfo( $parsed );
1027
1028                                 }.bind( this )
1029                         );
1030         };
1031
1032         /**
1033          * Track usage of highlight feature
1034          *
1035          * @param {string} action
1036          * @param {Array|Object|string} filters
1037          */
1038         mw.rcfilters.Controller.prototype._trackHighlight = function ( action, filters ) {
1039                 filters = typeof filters === 'string' ? { name: filters } : filters;
1040                 filters = !Array.isArray( filters ) ? [ filters ] : filters;
1041                 mw.track(
1042                         'event.ChangesListHighlights',
1043                         {
1044                                 action: action,
1045                                 filters: filters,
1046                                 userId: mw.user.getId()
1047                         }
1048                 );
1049         };
1050
1051         /**
1052          * Track filter grouping usage
1053          *
1054          * @param {string} action Action taken
1055          */
1056         mw.rcfilters.Controller.prototype.trackFilterGroupings = function ( action ) {
1057                 var controller = this,
1058                         rightNow = new Date().getTime(),
1059                         randomIdentifier = String( mw.user.sessionId() ) + String( rightNow ) + String( Math.random() ),
1060                         // Get all current filters
1061                         filters = this.filtersModel.getSelectedItems().map( function ( item ) {
1062                                 return item.getName();
1063                         } );
1064
1065                 action = action || 'filtermenu';
1066
1067                 // Check if these filters were the ones we just logged previously
1068                 // (Don't log the same grouping twice, in case the user opens/closes)
1069                 // the menu without action, or with the same result
1070                 if (
1071                         // Only log if the two arrays are different in size
1072                         filters.length !== this.prevLoggedItems.length ||
1073                         // Or if any filters are not the same as the cached filters
1074                         filters.some( function ( filterName ) {
1075                                 return controller.prevLoggedItems.indexOf( filterName ) === -1;
1076                         } ) ||
1077                         // Or if any cached filters are not the same as given filters
1078                         this.prevLoggedItems.some( function ( filterName ) {
1079                                 return filters.indexOf( filterName ) === -1;
1080                         } )
1081                 ) {
1082                         filters.forEach( function ( filterName ) {
1083                                 mw.track(
1084                                         'event.ChangesListFilterGrouping',
1085                                         {
1086                                                 action: action,
1087                                                 groupIdentifier: randomIdentifier,
1088                                                 filter: filterName,
1089                                                 userId: mw.user.getId()
1090                                         }
1091                                 );
1092                         } );
1093
1094                         // Cache the filter names
1095                         this.prevLoggedItems = filters;
1096                 }
1097         };
1098
1099         /**
1100          * Apply a change of parameters to the model state, and check whether
1101          * the new state is different than the old state.
1102          *
1103          * @param  {Object} newParamState New parameter state to apply
1104          * @return {boolean} New applied model state is different than the previous state
1105          */
1106         mw.rcfilters.Controller.prototype.applyParamChange = function ( newParamState ) {
1107                 var after,
1108                         before = this.filtersModel.getSelectedState();
1109
1110                 this.filtersModel.updateStateFromParams( newParamState );
1111
1112                 after = this.filtersModel.getSelectedState();
1113
1114                 return !OO.compare( before, after );
1115         };
1116
1117         /**
1118          * Mark all changes as seen on Watchlist
1119          */
1120         mw.rcfilters.Controller.prototype.markAllChangesAsSeen = function () {
1121                 var api = new mw.Api();
1122                 api.postWithToken( 'csrf', {
1123                         formatversion: 2,
1124                         action: 'setnotificationtimestamp',
1125                         entirewatchlist: true
1126                 } ).then( function () {
1127                         this.updateChangesList( null, 'markSeen' );
1128                 }.bind( this ) );
1129         };
1130 }( mediaWiki, jQuery ) );