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          */
  12         mw.rcfilters.Controller = function MwRcfiltersController( filtersModel, changesListModel, savedQueriesModel ) {
  13                 this.filtersModel = filtersModel;
  14                 this.changesListModel = changesListModel;
  15                 this.savedQueriesModel = savedQueriesModel;
  16                 this.requestCounter = {};
  17                 this.baseFilterState = {};
  18                 this.uriProcessor = null;
  19                 this.initializing = false;
  20
  21                 this.prevLoggedItems = [];
  22
  23                 this.FILTER_CHANGE = 'filterChange';
  24                 this.SHOW_NEW_CHANGES = 'showNewChanges';
  25                 this.LIVE_UPDATE = 'liveUpdate';
  26         };
  27
  28         /* Initialization */
  29         OO.initClass( mw.rcfilters.Controller );
  30
  31         /**
  32          * Initialize the filter and parameter states
  33          *
  34          * @param {Array} filterStructure Filter definition and structure for the model
  35          * @param {Object} [namespaceStructure] Namespace definition
  36          * @param {Object} [tagList] Tag definition
  37          */
  38         mw.rcfilters.Controller.prototype.initialize = function ( filterStructure, namespaceStructure, tagList ) {
  39                 var parsedSavedQueries, limitDefault,
  40                         displayConfig = mw.config.get( 'StructuredChangeFiltersDisplayConfig' ),
  41                         controller = this,
  42                         views = {},
  43                         items = [],
  44                         uri = new mw.Uri(),
  45                         $changesList = $( '.mw-changeslist' ).first().contents();
  46
  47                 // Prepare views
  48                 if ( namespaceStructure ) {
  49                         items = [];
  50                         $.each( namespaceStructure, function ( namespaceID, label ) {
  51                                 // Build and clean up the individual namespace items definition
  52                                 items.push( {
  53                                         name: namespaceID,
  54                                         label: label || mw.msg( 'blanknamespace' ),
  55                                         description: '',
  56                                         identifiers: [
  57                                                 ( namespaceID < 0 || namespaceID % 2 === 0 ) ?
  58                                                         'subject' : 'talk'
  59                                         ],
  60                                         cssClass: 'mw-changeslist-ns-' + namespaceID
  61                                 } );
  62                         } );
  63
  64                         views.namespaces = {
  65                                 title: mw.msg( 'namespaces' ),
  66                                 trigger: ':',
  67                                 groups: [ {
  68                                         // Group definition (single group)
  69                                         name: 'namespace', // parameter name is singular
  70                                         type: 'string_options',
  71                                         title: mw.msg( 'namespaces' ),
  72                                         labelPrefixKey: { 'default': 'rcfilters-tag-prefix-namespace', inverted: 'rcfilters-tag-prefix-namespace-inverted' },
  73                                         separator: ';',
  74                                         fullCoverage: true,
  75                                         filters: items
  76                                 } ]
  77                         };
  78                 }
  79                 if ( tagList ) {
  80                         views.tags = {
  81                                 title: mw.msg( 'rcfilters-view-tags' ),
  82                                 trigger: '#',
  83                                 groups: [ {
  84                                         // Group definition (single group)
  85                                         name: 'tagfilter', // Parameter name
  86                                         type: 'string_options',
  87                                         title: 'rcfilters-view-tags', // Message key
  88                                         labelPrefixKey: 'rcfilters-tag-prefix-tags',
  89                                         separator: '|',
  90                                         fullCoverage: false,
  91                                         filters: tagList
  92                                 } ]
  93                         };
  94                 }
  95
  96                 // Convert the default from the old preference
  97                 // since the limit preference actually affects more
  98                 // than just the RecentChanges page
  99                 limitDefault = Number( mw.user.options.get( 'rclimit', '50' ) );
 100
 101                 // Add parameter range operations
 102                 views.range = {
 103                         groups: [
 104                                 {
 105                                         name: 'limit',
 106                                         type: 'single_option',
 107                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 108                                         hidden: true,
 109                                         allowArbitrary: true,
 110                                         validate: $.isNumeric,
 111                                         range: {
 112                                                 min: 0, // The server normalizes negative numbers to 0 results
 113                                                 max: 1000
 114                                         },
 115                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 116                                         'default': String( limitDefault ),
 117                                         // Temporarily making this not sticky until we resolve the problem
 118                                         // with the misleading preference. Note that if this is to be permanent
 119                                         // we should remove all sticky behavior methods completely
 120                                         // See T172156
 121                                         // isSticky: true,
 122                                         excludedFromSavedQueries: true,
 123                                         filters: displayConfig.limitArray.map( function ( num ) {
 124                                                 return controller._createFilterDataFromNumber( num, num );
 125                                         } )
 126                                 },
 127                                 {
 128                                         name: 'days',
 129                                         type: 'single_option',
 130                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 131                                         hidden: true,
 132                                         allowArbitrary: true,
 133                                         validate: $.isNumeric,
 134                                         range: {
 135                                                 min: 0,
 136                                                 max: displayConfig.maxDays
 137                                         },
 138                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 139                                         numToLabelFunc: function ( i ) {
 140                                                 return Number( i ) < 1 ?
 141                                                         ( Number( i ) * 24 ).toFixed( 2 ) :
 142                                                         Number( i );
 143                                         },
 144                                         'default': mw.user.options.get( 'rcdays', '30' ),
 145                                         // Temporarily making this not sticky while limit is not sticky, see above
 146                                         // isSticky: true,
 147                                         excludedFromSavedQueries: true,
 148                                         filters: [
 149                                                 // Hours (1, 2, 6, 12)
 150                                                 0.04166, 0.0833, 0.25, 0.5
 151                                         // Days
 152                                         ].concat( displayConfig.daysArray )
 153                                                 .map( function ( num ) {
 154                                                         return controller._createFilterDataFromNumber(
 155                                                                 num,
 156                                                                 // Convert fractions of days to number of hours for the labels
 157                                                                 num < 1 ? Math.round( num * 24 ) : num
 158                                                         );
 159                                                 } )
 160                                 }
 161                         ]
 162                 };
 163
 164                 views.display = {
 165                         groups: [
 166                                 {
 167                                         name: 'display',
 168                                         type: 'boolean',
 169                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 170                                         hidden: true,
 171                                         isSticky: true,
 172                                         filters: [
 173                                                 {
 174                                                         name: 'enhanced',
 175                                                         'default': String( mw.user.options.get( 'usenewrc', 0 ) )
 176                                                 }
 177                                         ]
 178                                 }
 179                         ]
 180                 };
 181
 182                 // Before we do anything, we need to see if we require additional items in the
 183                 // groups that have 'AllowArbitrary'. For the moment, those are only single_option
 184                 // groups; if we ever expand it, this might need further generalization:
 185                 $.each( views, function ( viewName, viewData ) {
 186                         viewData.groups.forEach( function ( groupData ) {
 187                                 var extraValues = [];
 188                                 if ( groupData.allowArbitrary ) {
 189                                         // If the value in the URI isn't in the group, add it
 190                                         if ( uri.query[ groupData.name ] !== undefined ) {
 191                                                 extraValues.push( uri.query[ groupData.name ] );
 192                                         }
 193                                         // If the default value isn't in the group, add it
 194                                         if ( groupData.default !== undefined ) {
 195                                                 extraValues.push( String( groupData.default ) );
 196                                         }
 197                                         controller.addNumberValuesToGroup( groupData, extraValues );
 198                                 }
 199                         } );
 200                 } );
 201
 202                 // Initialize the model
 203                 this.filtersModel.initializeFilters( filterStructure, views );
 204
 205                 this._buildBaseFilterState();
 206
 207                 this.uriProcessor = new mw.rcfilters.UriProcessor(
 208                         this.filtersModel
 209                 );
 210
 211                 try {
 212                         parsedSavedQueries = JSON.parse( mw.user.options.get( 'rcfilters-saved-queries' ) || '{}' );
 213                 } catch ( err ) {
 214                         parsedSavedQueries = {};
 215                 }
 216
 217                 // The queries are saved in a minimized state, so we need
 218                 // to send over the base state so the saved queries model
 219                 // can normalize them per each query item
 220                 this.savedQueriesModel.initialize(
 221                         parsedSavedQueries,
 222                         this._getBaseFilterState(),
 223                         // This is for backwards compatibility - delete all excluded filter states
 224                         Object.keys( this.filtersModel.getExcludedFiltersState() )
 225                 );
 226
 227                 // Check whether we need to load defaults.
 228                 // We do this by checking whether the current URI query
 229                 // contains any parameters recognized by the system.
 230                 // If it does, we load the given state.
 231                 // If it doesn't, we have no values at all, and we assume
 232                 // the user loads the base-page and we load defaults.
 233                 // Defaults should only be applied on load (if necessary)
 234                 // or on request
 235                 this.initializing = true;
 236                 if (
 237                         this.savedQueriesModel.getDefault() &&
 238                         !this.uriProcessor.doesQueryContainRecognizedParams( uri.query )
 239                 ) {
 240                         // We have defaults from a saved query.
 241                         // We will load them straight-forward (as if
 242                         // they were clicked in the menu) so we trigger
 243                         // a full ajax request and change of URL
 244                         this.applySavedQuery( this.savedQueriesModel.getDefault() );
 245                 } else {
 246                         // There are either recognized parameters in the URL
 247                         // or there are none, but there is also no default
 248                         // saved query (so defaults are from the backend)
 249                         // We want to update the state but not fetch results
 250                         // again
 251                         this.updateStateFromUrl( false );
 252
 253                         // Update the changes list with the existing data
 254                         // so it gets processed
 255                         this.changesListModel.update(
 256                                 $changesList.length ? $changesList : 'NO_RESULTS',
 257                                 $( 'fieldset.rcoptions' ).first(),
 258                                 true // We're using existing DOM elements
 259                         );
 260                 }
 261
 262                 this.initializing = false;
 263                 this.switchView( 'default' );
 264
 265                 this._scheduleLiveUpdate();
 266         };
 267
 268         /**
 269          * Create filter data from a number, for the filters that are numerical value
 270          *
 271          * @param {Number} num Number
 272          * @param {Number} numForDisplay Number for the label
 273          * @return {Object} Filter data
 274          */
 275         mw.rcfilters.Controller.prototype._createFilterDataFromNumber = function ( num, numForDisplay ) {
 276                 return {
 277                         name: String( num ),
 278                         label: mw.language.convertNumber( numForDisplay )
 279                 };
 280         };
 281
 282         /**
 283          * Add an arbitrary values to groups that allow arbitrary values
 284          *
 285          * @param {Object} groupData Group data
 286          * @param {string|string[]} arbitraryValues An array of arbitrary values to add to the group
 287          */
 288         mw.rcfilters.Controller.prototype.addNumberValuesToGroup = function ( groupData, arbitraryValues ) {
 289                 var controller = this,
 290                         normalizeWithinRange = function ( range, val ) {
 291                                 if ( val < range.min ) {
 292                                         return range.min; // Min
 293                                 } else if ( val >= range.max ) {
 294                                         return range.max; // Max
 295                                 }
 296                                 return val;
 297                         };
 298
 299                 arbitraryValues = Array.isArray( arbitraryValues ) ? arbitraryValues : [ arbitraryValues ];
 300
 301                 // Normalize the arbitrary values and the default value for a range
 302                 if ( groupData.range ) {
 303                         arbitraryValues = arbitraryValues.map( function ( val ) {
 304                                 return normalizeWithinRange( groupData.range, val );
 305                         } );
 306
 307                         // Normalize the default, since that's user defined
 308                         if ( groupData.default !== undefined ) {
 309                                 groupData.default = String( normalizeWithinRange( groupData.range, groupData.default ) );
 310                         }
 311                 }
 312
 313                 // This is only true for single_option group
 314                 // We assume these are the only groups that will allow for
 315                 // arbitrary, since it doesn't make any sense for the other
 316                 // groups.
 317                 arbitraryValues.forEach( function ( val ) {
 318                         if (
 319                                 // If the group allows for arbitrary data
 320                                 groupData.allowArbitrary &&
 321                                 // and it is single_option (or string_options, but we
 322                                 // don't have cases of those yet, nor do we plan to)
 323                                 groupData.type === 'single_option' &&
 324                                 // and, if there is a validate method and it passes on
 325                                 // the data
 326                                 ( !groupData.validate || groupData.validate( val ) ) &&
 327                                 // but if that value isn't already in the definition
 328                                 groupData.filters
 329                                         .map( function ( filterData ) {
 330                                                 return String( filterData.name );
 331                                         } )
 332                                         .indexOf( String( val ) ) === -1
 333                         ) {
 334                                 // Add the filter information
 335                                 groupData.filters.push( controller._createFilterDataFromNumber(
 336                                         val,
 337                                         groupData.numToLabelFunc ?
 338                                                 groupData.numToLabelFunc( val ) :
 339                                                 val
 340                                 ) );
 341
 342                                 // If there's a sort function set up, re-sort the values
 343                                 if ( groupData.sortFunc ) {
 344                                         groupData.filters.sort( groupData.sortFunc );
 345                                 }
 346                         }
 347                 } );
 348         };
 349
 350         /**
 351          * Switch the view of the filters model
 352          *
 353          * @param {string} view Requested view
 354          */
 355         mw.rcfilters.Controller.prototype.switchView = function ( view ) {
 356                 this.filtersModel.switchView( view );
 357         };
 358
 359         /**
 360          * Reset to default filters
 361          */
 362         mw.rcfilters.Controller.prototype.resetToDefaults = function () {
 363                 this.uriProcessor.updateModelBasedOnQuery( this._getDefaultParams() );
 364
 365                 this.updateChangesList();
 366         };
 367
 368         /**
 369          * Empty all selected filters
 370          */
 371         mw.rcfilters.Controller.prototype.emptyFilters = function () {
 372                 var highlightedFilterNames = this.filtersModel
 373                         .getHighlightedItems()
 374                         .map( function ( filterItem ) { return { name: filterItem.getName() }; } );
 375
 376                 this.filtersModel.emptyAllFilters();
 377                 this.filtersModel.clearAllHighlightColors();
 378                 // Check all filter interactions
 379                 this.filtersModel.reassessFilterInteractions();
 380
 381                 this.updateChangesList();
 382
 383                 if ( highlightedFilterNames ) {
 384                         this._trackHighlight( 'clearAll', highlightedFilterNames );
 385                 }
 386         };
 387
 388         /**
 389          * Update the selected state of a filter
 390          *
 391          * @param {string} filterName Filter name
 392          * @param {boolean} [isSelected] Filter selected state
 393          */
 394         mw.rcfilters.Controller.prototype.toggleFilterSelect = function ( filterName, isSelected ) {
 395                 var filterItem = this.filtersModel.getItemByName( filterName );
 396
 397                 if ( !filterItem ) {
 398                         // If no filter was found, break
 399                         return;
 400                 }
 401
 402                 isSelected = isSelected === undefined ? !filterItem.isSelected() : isSelected;
 403
 404                 if ( filterItem.isSelected() !== isSelected ) {
 405                         this.filtersModel.toggleFilterSelected( filterName, isSelected );
 406
 407                         this.updateChangesList();
 408
 409                         // Check filter interactions
 410                         this.filtersModel.reassessFilterInteractions( filterItem );
 411                 }
 412         };
 413
 414         /**
 415          * Clear both highlight and selection of a filter
 416          *
 417          * @param {string} filterName Name of the filter item
 418          */
 419         mw.rcfilters.Controller.prototype.clearFilter = function ( filterName ) {
 420                 var filterItem = this.filtersModel.getItemByName( filterName ),
 421                         isHighlighted = filterItem.isHighlighted();
 422
 423                 if ( filterItem.isSelected() || isHighlighted ) {
 424                         this.filtersModel.clearHighlightColor( filterName );
 425                         this.filtersModel.toggleFilterSelected( filterName, false );
 426                         this.updateChangesList();
 427                         this.filtersModel.reassessFilterInteractions( filterItem );
 428
 429                         // Log filter grouping
 430                         this.trackFilterGroupings( 'removefilter' );
 431                 }
 432
 433                 if ( isHighlighted ) {
 434                         this._trackHighlight( 'clear', filterName );
 435                 }
 436         };
 437
 438         /**
 439          * Toggle the highlight feature on and off
 440          */
 441         mw.rcfilters.Controller.prototype.toggleHighlight = function () {
 442                 this.filtersModel.toggleHighlight();
 443                 this._updateURL();
 444
 445                 if ( this.filtersModel.isHighlightEnabled() ) {
 446                         mw.hook( 'RcFilters.highlight.enable' ).fire();
 447                 }
 448         };
 449
 450         /**
 451          * Toggle the namespaces inverted feature on and off
 452          */
 453         mw.rcfilters.Controller.prototype.toggleInvertedNamespaces = function () {
 454                 this.filtersModel.toggleInvertedNamespaces();
 455
 456                 if (
 457                         this.filtersModel.getFiltersByView( 'namespaces' )
 458                                 .filter( function ( filterItem ) {
 459                                         return filterItem.isSelected();
 460                                 } )
 461                                 .length
 462                 ) {
 463                         // Only re-fetch results if there are namespace items that are actually selected
 464                         this.updateChangesList();
 465                 }
 466         };
 467
 468         /**
 469          * Set the highlight color for a filter item
 470          *
 471          * @param {string} filterName Name of the filter item
 472          * @param {string} color Selected color
 473          */
 474         mw.rcfilters.Controller.prototype.setHighlightColor = function ( filterName, color ) {
 475                 this.filtersModel.setHighlightColor( filterName, color );
 476                 this._updateURL();
 477                 this._trackHighlight( 'set', { name: filterName, color: color } );
 478         };
 479
 480         /**
 481          * Clear highlight for a filter item
 482          *
 483          * @param {string} filterName Name of the filter item
 484          */
 485         mw.rcfilters.Controller.prototype.clearHighlightColor = function ( filterName ) {
 486                 this.filtersModel.clearHighlightColor( filterName );
 487                 this._updateURL();
 488                 this._trackHighlight( 'clear', filterName );
 489         };
 490
 491         /**
 492          * Enable or disable live updates.
 493          * @param {boolean} enable True to enable, false to disable
 494          */
 495         mw.rcfilters.Controller.prototype.toggleLiveUpdate = function ( enable ) {
 496                 this.changesListModel.toggleLiveUpdate( enable );
 497                 if ( this.changesListModel.getLiveUpdate() && this.changesListModel.getNewChangesExist() ) {
 498                         this.updateChangesList( null, this.LIVE_UPDATE );
 499                 }
 500         };
 501
 502         /**
 503          * Set a timeout for the next live update.
 504          * @private
 505          */
 506         mw.rcfilters.Controller.prototype._scheduleLiveUpdate = function () {
 507                 setTimeout( this._doLiveUpdate.bind( this ), 3000 );
 508         };
 509
 510         /**
 511          * Perform a live update.
 512          * @private
 513          */
 514         mw.rcfilters.Controller.prototype._doLiveUpdate = function () {
 515                 if ( !this._shouldCheckForNewChanges() ) {
 516                         // skip this turn and check back later
 517                         this._scheduleLiveUpdate();
 518                         return;
 519                 }
 520
 521                 this._checkForNewChanges()
 522                         .then( function ( data ) {
 523                                 if ( !this._shouldCheckForNewChanges() ) {
 524                                         // by the time the response is received,
 525                                         // it may not be appropriate anymore
 526                                         return;
 527                                 }
 528
 529                                 if ( data.changes !== 'NO_RESULTS' ) {
 530                                         if ( this.changesListModel.getLiveUpdate() ) {
 531                                                 return this.updateChangesList( null, this.LIVE_UPDATE );
 532                                         } else {
 533                                                 this.changesListModel.setNewChangesExist( true );
 534                                         }
 535                                 }
 536                         }.bind( this ) )
 537                         .always( this._scheduleLiveUpdate.bind( this ) );
 538         };
 539
 540         /**
 541          * @return {boolean} It's appropriate to check for new changes now
 542          * @private
 543          */
 544         mw.rcfilters.Controller.prototype._shouldCheckForNewChanges = function () {
 545                 var liveUpdateFeatureFlag = mw.config.get( 'wgStructuredChangeFiltersEnableLiveUpdate' ) ||
 546                         new mw.Uri().query.liveupdate;
 547
 548                 return !document.hidden &&
 549                         !this.filtersModel.hasConflict() &&
 550                         !this.changesListModel.getNewChangesExist() &&
 551                         !this.updatingChangesList &&
 552                         liveUpdateFeatureFlag;
 553         };
 554
 555         /**
 556          * Check if new changes, newer than those currently shown, are available
 557          *
 558          * @return {jQuery.Promise} Promise object that resolves after trying
 559          * to fetch 1 change newer than the last known 'from' parameter value
 560          *
 561          * @private
 562          */
 563         mw.rcfilters.Controller.prototype._checkForNewChanges = function () {
 564                 return this._fetchChangesList(
 565                         'liveUpdate',
 566                         {
 567                                 limit: 1,
 568                                 from: this.changesListModel.getNextFrom()
 569                         }
 570                 );
 571         };
 572
 573         /**
 574          * Show the new changes
 575          *
 576          * @return {jQuery.Promise} Promise object that resolves after
 577          * fetching and showing the new changes
 578          */
 579         mw.rcfilters.Controller.prototype.showNewChanges = function () {
 580                 return this.updateChangesList( null, this.SHOW_NEW_CHANGES );
 581         };
 582
 583         /**
 584          * Save the current model state as a saved query
 585          *
 586          * @param {string} [label] Label of the saved query
 587          * @param {boolean} [setAsDefault=false] This query should be set as the default
 588          */
 589         mw.rcfilters.Controller.prototype.saveCurrentQuery = function ( label, setAsDefault ) {
 590                 var queryID,
 591                         highlightedItems = {},
 592                         highlightEnabled = this.filtersModel.isHighlightEnabled(),
 593                         selectedState = this.filtersModel.getSelectedState();
 594
 595                 // Prepare highlights
 596                 this.filtersModel.getHighlightedItems().forEach( function ( item ) {
 597                         highlightedItems[ item.getName() ] = highlightEnabled ?
 598                                 item.getHighlightColor() : null;
 599                 } );
 600                 // These are filter states; highlight is stored as boolean
 601                 highlightedItems.highlight = this.filtersModel.isHighlightEnabled();
 602
 603                 // Delete all excluded filters
 604                 this._deleteExcludedValuesFromFilterState( selectedState );
 605
 606                 // Add item
 607                 queryID = this.savedQueriesModel.addNewQuery(
 608                         label || mw.msg( 'rcfilters-savedqueries-defaultlabel' ),
 609                         {
 610                                 filters: selectedState,
 611                                 highlights: highlightedItems,
 612                                 invert: this.filtersModel.areNamespacesInverted()
 613                         }
 614                 );
 615
 616                 if ( setAsDefault ) {
 617                         this.savedQueriesModel.setDefault( queryID );
 618                 }
 619
 620                 // Save item
 621                 this._saveSavedQueries();
 622         };
 623
 624         /**
 625          * Remove a saved query
 626          *
 627          * @param {string} queryID Query id
 628          */
 629         mw.rcfilters.Controller.prototype.removeSavedQuery = function ( queryID ) {
 630                 this.savedQueriesModel.removeQuery( queryID );
 631
 632                 this._saveSavedQueries();
 633         };
 634
 635         /**
 636          * Rename a saved query
 637          *
 638          * @param {string} queryID Query id
 639          * @param {string} newLabel New label for the query
 640          */
 641         mw.rcfilters.Controller.prototype.renameSavedQuery = function ( queryID, newLabel ) {
 642                 var queryItem = this.savedQueriesModel.getItemByID( queryID );
 643
 644                 if ( queryItem ) {
 645                         queryItem.updateLabel( newLabel );
 646                 }
 647                 this._saveSavedQueries();
 648         };
 649
 650         /**
 651          * Set a saved query as default
 652          *
 653          * @param {string} queryID Query Id. If null is given, default
 654          *  query is reset.
 655          */
 656         mw.rcfilters.Controller.prototype.setDefaultSavedQuery = function ( queryID ) {
 657                 this.savedQueriesModel.setDefault( queryID );
 658                 this._saveSavedQueries();
 659         };
 660
 661         /**
 662          * Load a saved query
 663          *
 664          * @param {string} queryID Query id
 665          */
 666         mw.rcfilters.Controller.prototype.applySavedQuery = function ( queryID ) {
 667                 var data, highlights,
 668                         queryItem = this.savedQueriesModel.getItemByID( queryID ),
 669                         currentMatchingQuery = this.findQueryMatchingCurrentState();
 670
 671                 if (
 672                         queryItem &&
 673                         (
 674                                 // If there's already a query, don't reload it
 675                                 // if it's the same as the one that already exists
 676                                 !currentMatchingQuery ||
 677                                 currentMatchingQuery.getID() !== queryItem.getID()
 678                         )
 679                 ) {
 680                         data = queryItem.getData();
 681                         highlights = data.highlights;
 682
 683                         // Backwards compatibility; initial version mispelled 'highlight' with 'highlights'
 684                         highlights.highlight = highlights.highlights || highlights.highlight;
 685
 686                         // Update model state from filters
 687                         this.filtersModel.toggleFiltersSelected(
 688                                 // Merge filters with excluded values
 689                                 $.extend( true, {}, data.filters, this.filtersModel.getExcludedFiltersState() )
 690                         );
 691
 692                         // Update namespace inverted property
 693                         this.filtersModel.toggleInvertedNamespaces( !!Number( data.invert ) );
 694
 695                         // Update highlight state
 696                         this.filtersModel.toggleHighlight( !!Number( highlights.highlight ) );
 697                         this.filtersModel.getItems().forEach( function ( filterItem ) {
 698                                 var color = highlights[ filterItem.getName() ];
 699                                 if ( color ) {
 700                                         filterItem.setHighlightColor( color );
 701                                 } else {
 702                                         filterItem.clearHighlightColor();
 703                                 }
 704                         } );
 705
 706                         // Check all filter interactions
 707                         this.filtersModel.reassessFilterInteractions();
 708
 709                         this.updateChangesList();
 710
 711                         // Log filter grouping
 712                         this.trackFilterGroupings( 'savedfilters' );
 713                 }
 714         };
 715
 716         /**
 717          * Check whether the current filter and highlight state exists
 718          * in the saved queries model.
 719          *
 720          * @return {boolean} Query exists
 721          */
 722         mw.rcfilters.Controller.prototype.findQueryMatchingCurrentState = function () {
 723                 var highlightedItems = {},
 724                         selectedState = this.filtersModel.getSelectedState();
 725
 726                 // Prepare highlights of the current query
 727                 this.filtersModel.getItemsSupportingHighlights().forEach( function ( item ) {
 728                         highlightedItems[ item.getName() ] = item.getHighlightColor();
 729                 } );
 730                 highlightedItems.highlight = this.filtersModel.isHighlightEnabled();
 731
 732                 // Remove anything that should be excluded from the saved query
 733                 // this includes sticky filters and filters marked with 'excludedFromSavedQueries'
 734                 this._deleteExcludedValuesFromFilterState( selectedState );
 735
 736                 return this.savedQueriesModel.findMatchingQuery(
 737                         {
 738                                 filters: selectedState,
 739                                 highlights: highlightedItems,
 740                                 invert: this.filtersModel.areNamespacesInverted()
 741                         }
 742                 );
 743         };
 744
 745         /**
 746          * Delete sticky filters from given object
 747          *
 748          * @param {Object} filterState Filter state
 749          */
 750         mw.rcfilters.Controller.prototype._deleteExcludedValuesFromFilterState = function ( filterState ) {
 751                 // Remove excluded filters
 752                 $.each( this.filtersModel.getExcludedFiltersState(), function ( filterName ) {
 753                         delete filterState[ filterName ];
 754                 } );
 755         };
 756
 757         /**
 758          * Get an object representing the base state of parameters
 759          * and highlights.
 760          *
 761          * This is meant to make sure that the saved queries that are
 762          * in memory are always the same structure as what we would get
 763          * by calling the current model's "getSelectedState" and by checking
 764          * highlight items.
 765          *
 766          * In cases where a user saved a query when the system had a certain
 767          * set of filters, and then a filter was added to the system, we want
 768          * to make sure that the stored queries can still be comparable to
 769          * the current state, which means that we need the base state for
 770          * two operations:
 771          *
 772          * - Saved queries are stored in "minimal" view (only changed filters
 773          *   are stored); When we initialize the system, we merge each minimal
 774          *   query with the base state (using 'getNormalizedFilters') so all
 775          *   saved queries have the exact same structure as what we would get
 776          *   by checking the getSelectedState of the filter.
 777          * - When we save the queries, we minimize the object to only represent
 778          *   whatever has actually changed, rather than store the entire
 779          *   object. To check what actually is different so we can store it,
 780          *   we need to obtain a base state to compare against, this is
 781          *   what #_getMinimalFilterList does
 782          */
 783         mw.rcfilters.Controller.prototype._buildBaseFilterState = function () {
 784                 var defaultParams = this.filtersModel.getDefaultParams(),
 785                         highlightedItems = {};
 786
 787                 // Prepare highlights
 788                 this.filtersModel.getItemsSupportingHighlights().forEach( function ( item ) {
 789                         highlightedItems[ item.getName() ] = null;
 790                 } );
 791                 highlightedItems.highlight = false;
 792
 793                 this.baseFilterState = {
 794                         filters: this.filtersModel.getFiltersFromParameters( defaultParams ),
 795                         highlights: highlightedItems,
 796                         invert: false
 797                 };
 798         };
 799
 800         /**
 801          * Get an object representing the base filter state of both
 802          * filters and highlights. The structure is similar to what we use
 803          * to store each query in the saved queries object:
 804          * {
 805          *    filters: {
 806          *        filterName: (bool)
 807          *    },
 808          *    highlights: {
 809          *        filterName: (string|null)
 810          *    }
 811          * }
 812          *
 813          * @return {Object} Object representing the base state of
 814          *  parameters and highlights
 815          */
 816         mw.rcfilters.Controller.prototype._getBaseFilterState = function () {
 817                 return this.baseFilterState;
 818         };
 819
 820         /**
 821          * Get an object that holds only the parameters and highlights that have
 822          * values different than the base default value.
 823          *
 824          * This is the reverse of the normalization we do initially on loading and
 825          * initializing the saved queries model.
 826          *
 827          * @param {Object} valuesObject Object representing the state of both
 828          *  filters and highlights in its normalized version, to be minimized.
 829          * @return {Object} Minimal filters and highlights list
 830          */
 831         mw.rcfilters.Controller.prototype._getMinimalFilterList = function ( valuesObject ) {
 832                 var result = { filters: {}, highlights: {} },
 833                         baseState = this._getBaseFilterState();
 834
 835                 // XOR results
 836                 $.each( valuesObject.filters, function ( name, value ) {
 837                         if ( baseState.filters !== undefined && baseState.filters[ name ] !== value ) {
 838                                 result.filters[ name ] = value;
 839                         }
 840                 } );
 841
 842                 $.each( valuesObject.highlights, function ( name, value ) {
 843                         if ( baseState.highlights !== undefined && baseState.highlights[ name ] !== value ) {
 844                                 result.highlights[ name ] = value;
 845                         }
 846                 } );
 847
 848                 return result;
 849         };
 850
 851         /**
 852          * Save the current state of the saved queries model with all
 853          * query item representation in the user settings.
 854          */
 855         mw.rcfilters.Controller.prototype._saveSavedQueries = function () {
 856                 var stringified,
 857                         state = this.savedQueriesModel.getState(),
 858                         controller = this;
 859
 860                 // Minimize before save
 861                 $.each( state.queries, function ( queryID, info ) {
 862                         state.queries[ queryID ].data = controller._getMinimalFilterList( info.data );
 863                 } );
 864
 865                 // Stringify state
 866                 stringified = JSON.stringify( state );
 867
 868                 if ( stringified.length > 65535 ) {
 869                         // Sanity check, since the preference can only hold that.
 870                         return;
 871                 }
 872
 873                 // Save the preference
 874                 new mw.Api().saveOption( 'rcfilters-saved-queries', stringified );
 875                 // Update the preference for this session
 876                 mw.user.options.set( 'rcfilters-saved-queries', stringified );
 877         };
 878
 879         /**
 880          * Update sticky preferences with current model state
 881          */
 882         mw.rcfilters.Controller.prototype.updateStickyPreferences = function () {
 883                 // Update default sticky values with selected, whether they came from
 884                 // the initial defaults or from the URL value that is being normalized
 885                 this.updateDaysDefault( this.filtersModel.getGroup( 'days' ).getSelectedItems()[ 0 ].getParamName() );
 886                 this.updateLimitDefault( this.filtersModel.getGroup( 'limit' ).getSelectedItems()[ 0 ].getParamName() );
 887
 888                 // TODO: Make these automatic by having the model go over sticky
 889                 // items and update their default values automatically
 890         };
 891
 892         /**
 893          * Update the limit default value
 894          *
 895          * param {number} newValue New value
 896          */
 897         mw.rcfilters.Controller.prototype.updateLimitDefault = function ( /* newValue */ ) {
 898                 // HACK: Temporarily remove this from being sticky
 899                 // See T172156
 900
 901                 /*
 902                 if ( !$.isNumeric( newValue ) ) {
 903                         return;
 904                 }
 905
 906                 newValue = Number( newValue );
 907
 908                 if ( mw.user.options.get( 'rcfilters-rclimit' ) !== newValue ) {
 909                         // Save the preference
 910                         new mw.Api().saveOption( 'rcfilters-rclimit', newValue );
 911                         // Update the preference for this session
 912                         mw.user.options.set( 'rcfilters-rclimit', newValue );
 913                 }
 914                 */
 915                 return;
 916         };
 917
 918         /**
 919          * Update the days default value
 920          *
 921          * param {number} newValue New value
 922          */
 923         mw.rcfilters.Controller.prototype.updateDaysDefault = function ( /* newValue */ ) {
 924                 // HACK: Temporarily remove this from being sticky
 925                 // See T172156
 926
 927                 /*
 928                 if ( !$.isNumeric( newValue ) ) {
 929                         return;
 930                 }
 931
 932                 newValue = Number( newValue );
 933
 934                 if ( mw.user.options.get( 'rcdays' ) !== newValue ) {
 935                         // Save the preference
 936                         new mw.Api().saveOption( 'rcdays', newValue );
 937                         // Update the preference for this session
 938                         mw.user.options.set( 'rcdays', newValue );
 939                 }
 940                 */
 941                 return;
 942         };
 943
 944         /**
 945          * Update the group by page default value
 946          *
 947          * @param {number} newValue New value
 948          */
 949         mw.rcfilters.Controller.prototype.updateGroupByPageDefault = function ( newValue ) {
 950                 if ( !$.isNumeric( newValue ) ) {
 951                         return;
 952                 }
 953
 954                 newValue = Number( newValue );
 955
 956                 if ( mw.user.options.get( 'usenewrc' ) !== newValue ) {
 957                         // Save the preference
 958                         new mw.Api().saveOption( 'usenewrc', newValue );
 959                         // Update the preference for this session
 960                         mw.user.options.set( 'usenewrc', newValue );
 961                 }
 962         };
 963
 964         /**
 965          * Synchronize the URL with the current state of the filters
 966          * without adding an history entry.
 967          */
 968         mw.rcfilters.Controller.prototype.replaceUrl = function () {
 969                 mw.rcfilters.UriProcessor.static.replaceState( this._getUpdatedUri() );
 970         };
 971
 972         /**
 973          * Update filter state (selection and highlighting) based
 974          * on current URL values.
 975          *
 976          * @param {boolean} [fetchChangesList=true] Fetch new results into the changes
 977          *  list based on the updated model.
 978          */
 979         mw.rcfilters.Controller.prototype.updateStateFromUrl = function ( fetchChangesList ) {
 980                 fetchChangesList = fetchChangesList === undefined ? true : !!fetchChangesList;
 981
 982                 this.uriProcessor.updateModelBasedOnQuery( new mw.Uri().query );
 983
 984                 // Update the sticky preferences, in case we received a value
 985                 // from the URL
 986                 this.updateStickyPreferences();
 987
 988                 // Only update and fetch new results if it is requested
 989                 if ( fetchChangesList ) {
 990                         this.updateChangesList();
 991                 }
 992         };
 993
 994         /**
 995          * Update the list of changes and notify the model
 996          *
 997          * @param {Object} [params] Extra parameters to add to the API call
 998          * @param {string} [updateMode='filterChange'] One of 'filterChange', 'liveUpdate', 'showNewChanges'
 999          * @return {jQuery.Promise} Promise that is resolved when the update is complete
1000          */
1001         mw.rcfilters.Controller.prototype.updateChangesList = function ( params, updateMode ) {
1002                 updateMode = updateMode === undefined ? this.FILTER_CHANGE : updateMode;
1003
1004                 if ( updateMode === this.FILTER_CHANGE ) {
1005                         this._updateURL( params );
1006                 }
1007                 if ( updateMode === this.FILTER_CHANGE || updateMode === this.SHOW_NEW_CHANGES ) {
1008                         this.changesListModel.invalidate();
1009                 }
1010                 this.changesListModel.setNewChangesExist( false );
1011                 this.updatingChangesList = true;
1012                 return this._fetchChangesList()
1013                         .then(
1014                                 // Success
1015                                 function ( pieces ) {
1016                                         var $changesListContent = pieces.changes,
1017                                                 $fieldset = pieces.fieldset;
1018                                         this.changesListModel.update(
1019                                                 $changesListContent,
1020                                                 $fieldset,
1021                                                 false,
1022                                                 updateMode === this.SHOW_NEW_CHANGES
1023                                         );
1024                                 }.bind( this )
1025                                 // Do nothing for failure
1026                         )
1027                         .always( function () {
1028                                 this.updatingChangesList = false;
1029                         }.bind( this ) );
1030         };
1031
1032         /**
1033          * Get an object representing the default parameter state, whether
1034          * it is from the model defaults or from the saved queries.
1035          *
1036          * @return {Object} Default parameters
1037          */
1038         mw.rcfilters.Controller.prototype._getDefaultParams = function () {
1039                 var data, queryHighlights,
1040                         savedParams = {},
1041                         savedHighlights = {},
1042                         defaultSavedQueryItem = this.savedQueriesModel.getItemByID( this.savedQueriesModel.getDefault() );
1043
1044                 if ( defaultSavedQueryItem ) {
1045                         data = defaultSavedQueryItem.getData();
1046
1047                         queryHighlights = data.highlights || {};
1048                         savedParams = this.filtersModel.getParametersFromFilters(
1049                                 // Merge filters with sticky values
1050                                 $.extend( true, {}, data.filters, this.filtersModel.getStickyFiltersState() )
1051                         );
1052
1053                         // Translate highlights to parameters
1054                         savedHighlights.highlight = String( Number( queryHighlights.highlight ) );
1055                         $.each( queryHighlights, function ( filterName, color ) {
1056                                 if ( filterName !== 'highlights' ) {
1057                                         savedHighlights[ filterName + '_color' ] = color;
1058                                 }
1059                         } );
1060
1061                         return $.extend( true, {}, savedParams, savedHighlights );
1062                 }
1063
1064                 return this.filtersModel.getDefaultParams();
1065         };
1066
1067         /**
1068          * Update the URL of the page to reflect current filters
1069          *
1070          * This should not be called directly from outside the controller.
1071          * If an action requires changing the URL, it should either use the
1072          * highlighting actions below, or call #updateChangesList which does
1073          * the uri corrections already.
1074          *
1075          * @param {Object} [params] Extra parameters to add to the API call
1076          */
1077         mw.rcfilters.Controller.prototype._updateURL = function ( params ) {
1078                 var currentUri = new mw.Uri(),
1079                         updatedUri = this._getUpdatedUri();
1080
1081                 updatedUri.extend( params || {} );
1082
1083                 if (
1084                         this.uriProcessor.getVersion( currentUri.query ) !== 2 ||
1085                         this.uriProcessor.isNewState( currentUri.query, updatedUri.query )
1086                 ) {
1087                         mw.rcfilters.UriProcessor.static.replaceState( updatedUri );
1088                 }
1089         };
1090
1091         /**
1092          * Get an updated mw.Uri object based on the model state
1093          *
1094          * @return {mw.Uri} Updated Uri
1095          */
1096         mw.rcfilters.Controller.prototype._getUpdatedUri = function () {
1097                 var uri = new mw.Uri();
1098
1099                 // Minimize url
1100                 uri.query = this.uriProcessor.minimizeQuery(
1101                         $.extend(
1102                                 true,
1103                                 {},
1104                                 // We want to retain unrecognized params
1105                                 // The uri params from model will override
1106                                 // any recognized value in the current uri
1107                                 // query, retain unrecognized params, and
1108                                 // the result will then be minimized
1109                                 uri.query,
1110                                 this.uriProcessor.getUriParametersFromModel(),
1111                                 { urlversion: '2' }
1112                         )
1113                 );
1114
1115                 return uri;
1116         };
1117
1118         /**
1119          * Fetch the list of changes from the server for the current filters
1120          *
1121          * @param {string} [counterId='updateChangesList'] Id for this request. To allow concurrent requests
1122          *  not to invalidate each other.
1123          * @param {Object} [params={}] Parameters to add to the query
1124          *
1125          * @return {jQuery.Promise} Promise object that will resolve with the changes list
1126          *  or with a string denoting no results.
1127          */
1128         mw.rcfilters.Controller.prototype._fetchChangesList = function ( counterId, params ) {
1129                 var uri = this._getUpdatedUri(),
1130                         stickyParams = this.filtersModel.getStickyParams(),
1131                         requestId,
1132                         latestRequest;
1133
1134                 counterId = counterId || 'updateChangesList';
1135                 params = params || {};
1136
1137                 uri.extend( params );
1138
1139                 this.requestCounter[ counterId ] = this.requestCounter[ counterId ] || 0;
1140                 requestId = ++this.requestCounter[ counterId ];
1141                 latestRequest = function () {
1142                         return requestId === this.requestCounter[ counterId ];
1143                 }.bind( this );
1144
1145                 // Sticky parameters override the URL params
1146                 // this is to make sure that whether we represent
1147                 // the sticky params in the URL or not (they may
1148                 // be normalized out) the sticky parameters are
1149                 // always being sent to the server with their
1150                 // current/default values
1151                 uri.extend( stickyParams );
1152
1153                 return $.ajax( uri.toString(), { contentType: 'html' } )
1154                         .then(
1155                                 // Success
1156                                 function ( html ) {
1157                                         var $parsed;
1158                                         if ( !latestRequest() ) {
1159                                                 return $.Deferred().reject();
1160                                         }
1161
1162                                         $parsed = $( $.parseHTML( html ) );
1163
1164                                         return {
1165                                                 // Changes list
1166                                                 changes: $parsed.find( '.mw-changeslist' ).first().contents(),
1167                                                 // Fieldset
1168                                                 fieldset: $parsed.find( 'fieldset.rcoptions' ).first()
1169                                         };
1170                                 },
1171                                 // Failure
1172                                 function ( responseObj ) {
1173                                         var $parsed;
1174
1175                                         if ( !latestRequest() ) {
1176                                                 return $.Deferred().reject();
1177                                         }
1178
1179                                         $parsed = $( $.parseHTML( responseObj.responseText ) );
1180
1181                                         // Force a resolve state to this promise
1182                                         return $.Deferred().resolve( {
1183                                                 changes: 'NO_RESULTS',
1184                                                 fieldset: $parsed.find( 'fieldset.rcoptions' ).first()
1185                                         } ).promise();
1186                                 }
1187                         );
1188         };
1189
1190         /**
1191          * Track usage of highlight feature
1192          *
1193          * @param {string} action
1194          * @param {Array|Object|string} filters
1195          */
1196         mw.rcfilters.Controller.prototype._trackHighlight = function ( action, filters ) {
1197                 filters = typeof filters === 'string' ? { name: filters } : filters;
1198                 filters = !Array.isArray( filters ) ? [ filters ] : filters;
1199                 mw.track(
1200                         'event.ChangesListHighlights',
1201                         {
1202                                 action: action,
1203                                 filters: filters,
1204                                 userId: mw.user.getId()
1205                         }
1206                 );
1207         };
1208
1209         /**
1210          * Track filter grouping usage
1211          *
1212          * @param {string} action Action taken
1213          */
1214         mw.rcfilters.Controller.prototype.trackFilterGroupings = function ( action ) {
1215                 var controller = this,
1216                         rightNow = new Date().getTime(),
1217                         randomIdentifier = String( mw.user.sessionId() ) + String( rightNow ) + String( Math.random() ),
1218                         // Get all current filters
1219                         filters = this.filtersModel.getSelectedItems().map( function ( item ) {
1220                                 return item.getName();
1221                         } );
1222
1223                 action = action || 'filtermenu';
1224
1225                 // Check if these filters were the ones we just logged previously
1226                 // (Don't log the same grouping twice, in case the user opens/closes)
1227                 // the menu without action, or with the same result
1228                 if (
1229                         // Only log if the two arrays are different in size
1230                         filters.length !== this.prevLoggedItems.length ||
1231                         // Or if any filters are not the same as the cached filters
1232                         filters.some( function ( filterName ) {
1233                                 return controller.prevLoggedItems.indexOf( filterName ) === -1;
1234                         } ) ||
1235                         // Or if any cached filters are not the same as given filters
1236                         this.prevLoggedItems.some( function ( filterName ) {
1237                                 return filters.indexOf( filterName ) === -1;
1238                         } )
1239                 ) {
1240                         filters.forEach( function ( filterName ) {
1241                                 mw.track(
1242                                         'event.ChangesListFilterGrouping',
1243                                         {
1244                                                 action: action,
1245                                                 groupIdentifier: randomIdentifier,
1246                                                 filter: filterName,
1247                                                 userId: mw.user.getId()
1248                                         }
1249                                 );
1250                         } );
1251
1252                         // Cache the filter names
1253                         this.prevLoggedItems = filters;
1254                 }
1255         };
1256 }( mediaWiki, jQuery ) );