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          * @cfg {string} daysPreferenceName Preference name for the days filter
  14          * @cfg {string} limitPreferenceName Preference name for the limit filter
  15          * @cfg {boolean} [normalizeTarget] Dictates whether or not to go through the
  16          *  title normalization to separate title subpage/parts into the target= url
  17          *  parameter
  18          */
  19         mw.rcfilters.Controller = function MwRcfiltersController( filtersModel, changesListModel, savedQueriesModel, config ) {
  20                 this.filtersModel = filtersModel;
  21                 this.changesListModel = changesListModel;
  22                 this.savedQueriesModel = savedQueriesModel;
  23                 this.savedQueriesPreferenceName = config.savedQueriesPreferenceName;
  24                 this.daysPreferenceName = config.daysPreferenceName;
  25                 this.limitPreferenceName = config.limitPreferenceName;
  26                 this.normalizeTarget = !!config.normalizeTarget;
  27
  28                 this.requestCounter = {};
  29                 this.baseFilterState = {};
  30                 this.uriProcessor = null;
  31                 this.initializing = false;
  32                 this.wereSavedQueriesSaved = false;
  33
  34                 this.prevLoggedItems = [];
  35
  36                 this.FILTER_CHANGE = 'filterChange';
  37                 this.SHOW_NEW_CHANGES = 'showNewChanges';
  38                 this.LIVE_UPDATE = 'liveUpdate';
  39         };
  40
  41         /* Initialization */
  42         OO.initClass( mw.rcfilters.Controller );
  43
  44         /**
  45          * Initialize the filter and parameter states
  46          *
  47          * @param {Array} filterStructure Filter definition and structure for the model
  48          * @param {Object} [namespaceStructure] Namespace definition
  49          * @param {Object} [tagList] Tag definition
  50          * @param {Object} [conditionalViews] Conditional view definition
  51          */
  52         mw.rcfilters.Controller.prototype.initialize = function ( filterStructure, namespaceStructure, tagList, conditionalViews ) {
  53                 var parsedSavedQueries, pieces,
  54                         displayConfig = mw.config.get( 'StructuredChangeFiltersDisplayConfig' ),
  55                         defaultSavedQueryExists = mw.config.get( 'wgStructuredChangeFiltersDefaultSavedQueryExists' ),
  56                         controller = this,
  57                         views = $.extend( true, {}, conditionalViews ),
  58                         items = [],
  59                         uri = new mw.Uri();
  60
  61                 // Prepare views
  62                 if ( namespaceStructure ) {
  63                         items = [];
  64                         $.each( namespaceStructure, function ( namespaceID, label ) {
  65                                 // Build and clean up the individual namespace items definition
  66                                 items.push( {
  67                                         name: namespaceID,
  68                                         label: label || mw.msg( 'blanknamespace' ),
  69                                         description: '',
  70                                         identifiers: [
  71                                                 ( namespaceID < 0 || namespaceID % 2 === 0 ) ?
  72                                                         'subject' : 'talk'
  73                                         ],
  74                                         cssClass: 'mw-changeslist-ns-' + namespaceID
  75                                 } );
  76                         } );
  77
  78                         views.namespaces = {
  79                                 title: mw.msg( 'namespaces' ),
  80                                 trigger: ':',
  81                                 groups: [ {
  82                                         // Group definition (single group)
  83                                         name: 'namespace', // parameter name is singular
  84                                         type: 'string_options',
  85                                         title: mw.msg( 'namespaces' ),
  86                                         labelPrefixKey: { 'default': 'rcfilters-tag-prefix-namespace', inverted: 'rcfilters-tag-prefix-namespace-inverted' },
  87                                         separator: ';',
  88                                         fullCoverage: true,
  89                                         filters: items
  90                                 } ]
  91                         };
  92                         views.invert = {
  93                                 groups: [
  94                                         {
  95                                                 name: 'invertGroup',
  96                                                 type: 'boolean',
  97                                                 hidden: true,
  98                                                 filters: [ {
  99                                                         name: 'invert',
 100                                                         'default': '0'
 101                                                 } ]
 102                                         } ]
 103                         };
 104                 }
 105                 if ( tagList ) {
 106                         views.tags = {
 107                                 title: mw.msg( 'rcfilters-view-tags' ),
 108                                 trigger: '#',
 109                                 groups: [ {
 110                                         // Group definition (single group)
 111                                         name: 'tagfilter', // Parameter name
 112                                         type: 'string_options',
 113                                         title: 'rcfilters-view-tags', // Message key
 114                                         labelPrefixKey: 'rcfilters-tag-prefix-tags',
 115                                         separator: '|',
 116                                         fullCoverage: false,
 117                                         filters: tagList
 118                                 } ]
 119                         };
 120                 }
 121
 122                 // Add parameter range operations
 123                 views.range = {
 124                         groups: [
 125                                 {
 126                                         name: 'limit',
 127                                         type: 'single_option',
 128                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 129                                         hidden: true,
 130                                         allowArbitrary: true,
 131                                         validate: $.isNumeric,
 132                                         range: {
 133                                                 min: 0, // The server normalizes negative numbers to 0 results
 134                                                 max: 1000
 135                                         },
 136                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 137                                         'default': mw.user.options.get( this.limitPreferenceName, displayConfig.limitDefault ),
 138                                         sticky: true,
 139                                         filters: displayConfig.limitArray.map( function ( num ) {
 140                                                 return controller._createFilterDataFromNumber( num, num );
 141                                         } )
 142                                 },
 143                                 {
 144                                         name: 'days',
 145                                         type: 'single_option',
 146                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 147                                         hidden: true,
 148                                         allowArbitrary: true,
 149                                         validate: $.isNumeric,
 150                                         range: {
 151                                                 min: 0,
 152                                                 max: displayConfig.maxDays
 153                                         },
 154                                         sortFunc: function ( a, b ) { return Number( a.name ) - Number( b.name ); },
 155                                         numToLabelFunc: function ( i ) {
 156                                                 return Number( i ) < 1 ?
 157                                                         ( Number( i ) * 24 ).toFixed( 2 ) :
 158                                                         Number( i );
 159                                         },
 160                                         'default': mw.user.options.get( this.daysPreferenceName, displayConfig.daysDefault ),
 161                                         sticky: true,
 162                                         filters: [
 163                                                 // Hours (1, 2, 6, 12)
 164                                                 0.04166, 0.0833, 0.25, 0.5
 165                                         // Days
 166                                         ].concat( displayConfig.daysArray )
 167                                                 .map( function ( num ) {
 168                                                         return controller._createFilterDataFromNumber(
 169                                                                 num,
 170                                                                 // Convert fractions of days to number of hours for the labels
 171                                                                 num < 1 ? Math.round( num * 24 ) : num
 172                                                         );
 173                                                 } )
 174                                 }
 175                         ]
 176                 };
 177
 178                 views.display = {
 179                         groups: [
 180                                 {
 181                                         name: 'display',
 182                                         type: 'boolean',
 183                                         title: '', // Because it's a hidden group, this title actually appears nowhere
 184                                         hidden: true,
 185                                         sticky: true,
 186                                         filters: [
 187                                                 {
 188                                                         name: 'enhanced',
 189                                                         'default': String( mw.user.options.get( 'usenewrc', 0 ) )
 190                                                 }
 191                                         ]
 192                                 }
 193                         ]
 194                 };
 195
 196                 // Before we do anything, we need to see if we require additional items in the
 197                 // groups that have 'AllowArbitrary'. For the moment, those are only single_option
 198                 // groups; if we ever expand it, this might need further generalization:
 199                 $.each( views, function ( viewName, viewData ) {
 200                         viewData.groups.forEach( function ( groupData ) {
 201                                 var extraValues = [];
 202                                 if ( groupData.allowArbitrary ) {
 203                                         // If the value in the URI isn't in the group, add it
 204                                         if ( uri.query[ groupData.name ] !== undefined ) {
 205                                                 extraValues.push( uri.query[ groupData.name ] );
 206                                         }
 207                                         // If the default value isn't in the group, add it
 208                                         if ( groupData.default !== undefined ) {
 209                                                 extraValues.push( String( groupData.default ) );
 210                                         }
 211                                         controller.addNumberValuesToGroup( groupData, extraValues );
 212                                 }
 213                         } );
 214                 } );
 215
 216                 // Initialize the model
 217                 this.filtersModel.initializeFilters( filterStructure, views );
 218
 219                 this.uriProcessor = new mw.rcfilters.UriProcessor(
 220                         this.filtersModel,
 221                         { normalizeTarget: this.normalizeTarget }
 222                 );
 223
 224                 if ( !mw.user.isAnon() ) {
 225                         try {
 226                                 parsedSavedQueries = JSON.parse( mw.user.options.get( this.savedQueriesPreferenceName ) || '{}' );
 227                         } catch ( err ) {
 228                                 parsedSavedQueries = {};
 229                         }
 230
 231                         // Initialize saved queries
 232                         this.savedQueriesModel.initialize( parsedSavedQueries );
 233                         if ( this.savedQueriesModel.isConverted() ) {
 234                                 // Since we know we converted, we're going to re-save
 235                                 // the queries so they are now migrated to the new format
 236                                 this._saveSavedQueries();
 237                         }
 238                 }
 239
 240                 // Check whether we need to load defaults.
 241                 // We do this by checking whether the current URI query
 242                 // contains any parameters recognized by the system.
 243                 // If it does, we load the given state.
 244                 // If it doesn't, we have no values at all, and we assume
 245                 // the user loads the base-page and we load defaults.
 246                 // Defaults should only be applied on load (if necessary)
 247                 // or on request
 248                 this.initializing = true;
 249
 250                 if ( defaultSavedQueryExists ) {
 251                         // This came from the server, meaning that we have a default
 252                         // saved query, but the server could not load it, probably because
 253                         // it was pre-conversion to the new format.
 254                         // We need to load this query again
 255                         this.applySavedQuery( this.savedQueriesModel.getDefault() );
 256                 } else {
 257                         // There are either recognized parameters in the URL
 258                         // or there are none, but there is also no default
 259                         // saved query (so defaults are from the backend)
 260                         // We want to update the state but not fetch results
 261                         // again
 262                         this.updateStateFromUrl( false );
 263
 264                         pieces = this._extractChangesListInfo( $( '#mw-content-text' ) );
 265
 266                         // Update the changes list with the existing data
 267                         // so it gets processed
 268                         this.changesListModel.update(
 269                                 pieces.changes,
 270                                 pieces.fieldset,
 271                                 pieces.noResultsDetails,
 272                                 true // We're using existing DOM elements
 273                         );
 274                 }
 275
 276                 this.initializing = false;
 277                 this.switchView( 'default' );
 278
 279                 this.pollingRate = mw.config.get( 'StructuredChangeFiltersLiveUpdatePollingRate' );
 280                 if ( this.pollingRate ) {
 281                         this._scheduleLiveUpdate();
 282                 }
 283         };
 284
 285         /**
 286          * Extracts information from the changes list DOM
 287          *
 288          * @param {jQuery} $root Root DOM to find children from
 289          * @param {boolean} [statusCode] Server response status code
 290          * @return {Object} Information about changes list
 291          * @return {Object|string} return.changes Changes list, or 'NO_RESULTS' if there are no results
 292          *   (either normally or as an error)
 293          * @return {string} [return.noResultsDetails] 'NO_RESULTS_NORMAL' for a normal 0-result set,
 294          *   'NO_RESULTS_TIMEOUT' for no results due to a timeout, or omitted for more than 0 results
 295          * @return {jQuery} return.fieldset Fieldset
 296          */
 297         mw.rcfilters.Controller.prototype._extractChangesListInfo = function ( $root, statusCode ) {
 298                 var info,
 299                         $changesListContents = $root.find( '.mw-changeslist' ).first().contents(),
 300                         areResults = !!$changesListContents.length,
 301                         checkForLogout = !areResults && statusCode === 200;
 302
 303                 // We check if user logged out on different tab/browser or the session has expired.
 304                 // 205 status code returned from the server, which indicates that we need to reload the page
 305                 // is not usable on WL page, because we get redirected to login page, which gives 200 OK
 306                 // status code (if everything else goes well).
 307                 // Bug: T177717
 308                 if ( checkForLogout && !!$root.find( '#wpName1' ).length ) {
 309                         location.reload( false );
 310                         return;
 311                 }
 312
 313                 info = {
 314                         changes: $changesListContents.length ? $changesListContents : 'NO_RESULTS',
 315                         fieldset: $root.find( 'fieldset.cloptions' ).first()
 316                 };
 317
 318                 if ( !areResults ) {
 319                         if ( $root.find( '.mw-changeslist-timeout' ).length ) {
 320                                 info.noResultsDetails = 'NO_RESULTS_TIMEOUT';
 321                         } else if ( $root.find( '.mw-changeslist-notargetpage' ).length ) {
 322                                 info.noResultsDetails = 'NO_RESULTS_NO_TARGET_PAGE';
 323                         } else {
 324                                 info.noResultsDetails = 'NO_RESULTS_NORMAL';
 325                         }
 326                 }
 327
 328                 return info;
 329         };
 330
 331         /**
 332          * Create filter data from a number, for the filters that are numerical value
 333          *
 334          * @param {Number} num Number
 335          * @param {Number} numForDisplay Number for the label
 336          * @return {Object} Filter data
 337          */
 338         mw.rcfilters.Controller.prototype._createFilterDataFromNumber = function ( num, numForDisplay ) {
 339                 return {
 340                         name: String( num ),
 341                         label: mw.language.convertNumber( numForDisplay )
 342                 };
 343         };
 344
 345         /**
 346          * Add an arbitrary values to groups that allow arbitrary values
 347          *
 348          * @param {Object} groupData Group data
 349          * @param {string|string[]} arbitraryValues An array of arbitrary values to add to the group
 350          */
 351         mw.rcfilters.Controller.prototype.addNumberValuesToGroup = function ( groupData, arbitraryValues ) {
 352                 var controller = this,
 353                         normalizeWithinRange = function ( range, val ) {
 354                                 if ( val < range.min ) {
 355                                         return range.min; // Min
 356                                 } else if ( val >= range.max ) {
 357                                         return range.max; // Max
 358                                 }
 359                                 return val;
 360                         };
 361
 362                 arbitraryValues = Array.isArray( arbitraryValues ) ? arbitraryValues : [ arbitraryValues ];
 363
 364                 // Normalize the arbitrary values and the default value for a range
 365                 if ( groupData.range ) {
 366                         arbitraryValues = arbitraryValues.map( function ( val ) {
 367                                 return normalizeWithinRange( groupData.range, val );
 368                         } );
 369
 370                         // Normalize the default, since that's user defined
 371                         if ( groupData.default !== undefined ) {
 372                                 groupData.default = String( normalizeWithinRange( groupData.range, groupData.default ) );
 373                         }
 374                 }
 375
 376                 // This is only true for single_option group
 377                 // We assume these are the only groups that will allow for
 378                 // arbitrary, since it doesn't make any sense for the other
 379                 // groups.
 380                 arbitraryValues.forEach( function ( val ) {
 381                         if (
 382                                 // If the group allows for arbitrary data
 383                                 groupData.allowArbitrary &&
 384                                 // and it is single_option (or string_options, but we
 385                                 // don't have cases of those yet, nor do we plan to)
 386                                 groupData.type === 'single_option' &&
 387                                 // and, if there is a validate method and it passes on
 388                                 // the data
 389                                 ( !groupData.validate || groupData.validate( val ) ) &&
 390                                 // but if that value isn't already in the definition
 391                                 groupData.filters
 392                                         .map( function ( filterData ) {
 393                                                 return String( filterData.name );
 394                                         } )
 395                                         .indexOf( String( val ) ) === -1
 396                         ) {
 397                                 // Add the filter information
 398                                 groupData.filters.push( controller._createFilterDataFromNumber(
 399                                         val,
 400                                         groupData.numToLabelFunc ?
 401                                                 groupData.numToLabelFunc( val ) :
 402                                                 val
 403                                 ) );
 404
 405                                 // If there's a sort function set up, re-sort the values
 406                                 if ( groupData.sortFunc ) {
 407                                         groupData.filters.sort( groupData.sortFunc );
 408                                 }
 409                         }
 410                 } );
 411         };
 412
 413         /**
 414          * Reset to default filters
 415          */
 416         mw.rcfilters.Controller.prototype.resetToDefaults = function () {
 417                 var params = this._getDefaultParams();
 418                 if ( this.applyParamChange( params ) ) {
 419                         // Only update the changes list if there was a change to actual filters
 420                         this.updateChangesList();
 421                 } else {
 422                         this.uriProcessor.updateURL( params );
 423                 }
 424         };
 425
 426         /**
 427          * Check whether the default values of the filters are all false.
 428          *
 429          * @return {boolean} Defaults are all false
 430          */
 431         mw.rcfilters.Controller.prototype.areDefaultsEmpty = function () {
 432                 return $.isEmptyObject( this._getDefaultParams() );
 433         };
 434
 435         /**
 436          * Empty all selected filters
 437          */
 438         mw.rcfilters.Controller.prototype.emptyFilters = function () {
 439                 var highlightedFilterNames = this.filtersModel.getHighlightedItems()
 440                         .map( function ( filterItem ) { return { name: filterItem.getName() }; } );
 441
 442                 if ( this.applyParamChange( {} ) ) {
 443                         // Only update the changes list if there was a change to actual filters
 444                         this.updateChangesList();
 445                 } else {
 446                         this.uriProcessor.updateURL();
 447                 }
 448
 449                 if ( highlightedFilterNames ) {
 450                         this._trackHighlight( 'clearAll', highlightedFilterNames );
 451                 }
 452         };
 453
 454         /**
 455          * Update the selected state of a filter
 456          *
 457          * @param {string} filterName Filter name
 458          * @param {boolean} [isSelected] Filter selected state
 459          */
 460         mw.rcfilters.Controller.prototype.toggleFilterSelect = function ( filterName, isSelected ) {
 461                 var filterItem = this.filtersModel.getItemByName( filterName );
 462
 463                 if ( !filterItem ) {
 464                         // If no filter was found, break
 465                         return;
 466                 }
 467
 468                 isSelected = isSelected === undefined ? !filterItem.isSelected() : isSelected;
 469
 470                 if ( filterItem.isSelected() !== isSelected ) {
 471                         this.filtersModel.toggleFilterSelected( filterName, isSelected );
 472
 473                         this.updateChangesList();
 474
 475                         // Check filter interactions
 476                         this.filtersModel.reassessFilterInteractions( filterItem );
 477                 }
 478         };
 479
 480         /**
 481          * Clear both highlight and selection of a filter
 482          *
 483          * @param {string} filterName Name of the filter item
 484          */
 485         mw.rcfilters.Controller.prototype.clearFilter = function ( filterName ) {
 486                 var filterItem = this.filtersModel.getItemByName( filterName ),
 487                         isHighlighted = filterItem.isHighlighted(),
 488                         isSelected = filterItem.isSelected();
 489
 490                 if ( isSelected || isHighlighted ) {
 491                         this.filtersModel.clearHighlightColor( filterName );
 492                         this.filtersModel.toggleFilterSelected( filterName, false );
 493
 494                         if ( isSelected ) {
 495                                 // Only update the changes list if the filter changed
 496                                 // its selection state. If it only changed its highlight
 497                                 // then don't reload
 498                                 this.updateChangesList();
 499                         }
 500
 501                         this.filtersModel.reassessFilterInteractions( filterItem );
 502
 503                         // Log filter grouping
 504                         this.trackFilterGroupings( 'removefilter' );
 505                 }
 506
 507                 if ( isHighlighted ) {
 508                         this._trackHighlight( 'clear', filterName );
 509                 }
 510         };
 511
 512         /**
 513          * Toggle the highlight feature on and off
 514          */
 515         mw.rcfilters.Controller.prototype.toggleHighlight = function () {
 516                 this.filtersModel.toggleHighlight();
 517                 this.uriProcessor.updateURL();
 518
 519                 if ( this.filtersModel.isHighlightEnabled() ) {
 520                         mw.hook( 'RcFilters.highlight.enable' ).fire();
 521                 }
 522         };
 523
 524         /**
 525          * Toggle the namespaces inverted feature on and off
 526          */
 527         mw.rcfilters.Controller.prototype.toggleInvertedNamespaces = function () {
 528                 this.filtersModel.toggleInvertedNamespaces();
 529                 if (
 530                         this.filtersModel.getFiltersByView( 'namespaces' ).filter(
 531                                 function ( filterItem ) { return filterItem.isSelected(); }
 532                         ).length
 533                 ) {
 534                         // Only re-fetch results if there are namespace items that are actually selected
 535                         this.updateChangesList();
 536                 } else {
 537                         this.uriProcessor.updateURL();
 538                 }
 539         };
 540
 541         /**
 542          * Set the value of the 'showlinkedto' parameter
 543          * @param {boolean} value
 544          */
 545         mw.rcfilters.Controller.prototype.setShowLinkedTo = function ( value ) {
 546                 var targetItem = this.filtersModel.getGroup( 'page' ).getItemByParamName( 'target' ),
 547                         showLinkedToItem = this.filtersModel.getGroup( 'toOrFrom' ).getItemByParamName( 'showlinkedto' );
 548
 549                 this.filtersModel.toggleFilterSelected( showLinkedToItem.getName(), value );
 550                 this.uriProcessor.updateURL();
 551                 // reload the results only when target is set
 552                 if ( targetItem.getValue() ) {
 553                         this.updateChangesList();
 554                 }
 555         };
 556
 557         /**
 558          * Set the target page
 559          * @param {string} page
 560          */
 561         mw.rcfilters.Controller.prototype.setTargetPage = function ( page ) {
 562                 var targetItem = this.filtersModel.getGroup( 'page' ).getItemByParamName( 'target' );
 563                 targetItem.setValue( page );
 564                 this.uriProcessor.updateURL();
 565                 this.updateChangesList();
 566         };
 567
 568         /**
 569          * Set the highlight color for a filter item
 570          *
 571          * @param {string} filterName Name of the filter item
 572          * @param {string} color Selected color
 573          */
 574         mw.rcfilters.Controller.prototype.setHighlightColor = function ( filterName, color ) {
 575                 this.filtersModel.setHighlightColor( filterName, color );
 576                 this.uriProcessor.updateURL();
 577                 this._trackHighlight( 'set', { name: filterName, color: color } );
 578         };
 579
 580         /**
 581          * Clear highlight for a filter item
 582          *
 583          * @param {string} filterName Name of the filter item
 584          */
 585         mw.rcfilters.Controller.prototype.clearHighlightColor = function ( filterName ) {
 586                 this.filtersModel.clearHighlightColor( filterName );
 587                 this.uriProcessor.updateURL();
 588                 this._trackHighlight( 'clear', filterName );
 589         };
 590
 591         /**
 592          * Enable or disable live updates.
 593          * @param {boolean} enable True to enable, false to disable
 594          */
 595         mw.rcfilters.Controller.prototype.toggleLiveUpdate = function ( enable ) {
 596                 this.changesListModel.toggleLiveUpdate( enable );
 597                 if ( this.changesListModel.getLiveUpdate() && this.changesListModel.getNewChangesExist() ) {
 598                         this.updateChangesList( null, this.LIVE_UPDATE );
 599                 }
 600         };
 601
 602         /**
 603          * Set a timeout for the next live update.
 604          * @private
 605          */
 606         mw.rcfilters.Controller.prototype._scheduleLiveUpdate = function () {
 607                 setTimeout( this._doLiveUpdate.bind( this ), this.pollingRate * 1000 );
 608         };
 609
 610         /**
 611          * Perform a live update.
 612          * @private
 613          */
 614         mw.rcfilters.Controller.prototype._doLiveUpdate = function () {
 615                 if ( !this._shouldCheckForNewChanges() ) {
 616                         // skip this turn and check back later
 617                         this._scheduleLiveUpdate();
 618                         return;
 619                 }
 620
 621                 this._checkForNewChanges()
 622                         .then( function ( statusCode ) {
 623                                 // no result is 204 with the 'peek' param
 624                                 // logged out is 205
 625                                 var newChanges = statusCode === 200;
 626
 627                                 if ( !this._shouldCheckForNewChanges() ) {
 628                                         // by the time the response is received,
 629                                         // it may not be appropriate anymore
 630                                         return;
 631                                 }
 632
 633                                 // 205 is the status code returned from server when user's logged in/out
 634                                 // status is not matching while fetching live update changes.
 635                                 // This works only on Recent Changes page. For WL, look _extractChangesListInfo.
 636                                 // Bug: T177717
 637                                 if ( statusCode === 205 ) {
 638                                         location.reload( false );
 639                                         return;
 640                                 }
 641
 642                                 if ( newChanges ) {
 643                                         if ( this.changesListModel.getLiveUpdate() ) {
 644                                                 return this.updateChangesList( null, this.LIVE_UPDATE );
 645                                         } else {
 646                                                 this.changesListModel.setNewChangesExist( true );
 647                                         }
 648                                 }
 649                         }.bind( this ) )
 650                         .always( this._scheduleLiveUpdate.bind( this ) );
 651         };
 652
 653         /**
 654          * @return {boolean} It's appropriate to check for new changes now
 655          * @private
 656          */
 657         mw.rcfilters.Controller.prototype._shouldCheckForNewChanges = function () {
 658                 return !document.hidden &&
 659                         !this.filtersModel.hasConflict() &&
 660                         !this.changesListModel.getNewChangesExist() &&
 661                         !this.updatingChangesList &&
 662                         this.changesListModel.getNextFrom();
 663         };
 664
 665         /**
 666          * Check if new changes, newer than those currently shown, are available
 667          *
 668          * @return {jQuery.Promise} Promise object that resolves with a bool
 669          *      specifying if there are new changes or not
 670          *
 671          * @private
 672          */
 673         mw.rcfilters.Controller.prototype._checkForNewChanges = function () {
 674                 var params = {
 675                         limit: 1,
 676                         peek: 1, // bypasses ChangesList specific UI
 677                         from: this.changesListModel.getNextFrom(),
 678                         isAnon: mw.user.isAnon()
 679                 };
 680                 return this._queryChangesList( 'liveUpdate', params ).then(
 681                         function ( data ) {
 682                                 return data.status;
 683                         }
 684                 );
 685         };
 686
 687         /**
 688          * Show the new changes
 689          *
 690          * @return {jQuery.Promise} Promise object that resolves after
 691          * fetching and showing the new changes
 692          */
 693         mw.rcfilters.Controller.prototype.showNewChanges = function () {
 694                 return this.updateChangesList( null, this.SHOW_NEW_CHANGES );
 695         };
 696
 697         /**
 698          * Save the current model state as a saved query
 699          *
 700          * @param {string} [label] Label of the saved query
 701          * @param {boolean} [setAsDefault=false] This query should be set as the default
 702          */
 703         mw.rcfilters.Controller.prototype.saveCurrentQuery = function ( label, setAsDefault ) {
 704                 // Add item
 705                 this.savedQueriesModel.addNewQuery(
 706                         label || mw.msg( 'rcfilters-savedqueries-defaultlabel' ),
 707                         this.filtersModel.getCurrentParameterState( true ),
 708                         setAsDefault
 709                 );
 710
 711                 // Save item
 712                 this._saveSavedQueries();
 713         };
 714
 715         /**
 716          * Remove a saved query
 717          *
 718          * @param {string} queryID Query id
 719          */
 720         mw.rcfilters.Controller.prototype.removeSavedQuery = function ( queryID ) {
 721                 this.savedQueriesModel.removeQuery( queryID );
 722
 723                 this._saveSavedQueries();
 724         };
 725
 726         /**
 727          * Rename a saved query
 728          *
 729          * @param {string} queryID Query id
 730          * @param {string} newLabel New label for the query
 731          */
 732         mw.rcfilters.Controller.prototype.renameSavedQuery = function ( queryID, newLabel ) {
 733                 var queryItem = this.savedQueriesModel.getItemByID( queryID );
 734
 735                 if ( queryItem ) {
 736                         queryItem.updateLabel( newLabel );
 737                 }
 738                 this._saveSavedQueries();
 739         };
 740
 741         /**
 742          * Set a saved query as default
 743          *
 744          * @param {string} queryID Query Id. If null is given, default
 745          *  query is reset.
 746          */
 747         mw.rcfilters.Controller.prototype.setDefaultSavedQuery = function ( queryID ) {
 748                 this.savedQueriesModel.setDefault( queryID );
 749                 this._saveSavedQueries();
 750         };
 751
 752         /**
 753          * Load a saved query
 754          *
 755          * @param {string} queryID Query id
 756          */
 757         mw.rcfilters.Controller.prototype.applySavedQuery = function ( queryID ) {
 758                 var currentMatchingQuery,
 759                         params = this.savedQueriesModel.getItemParams( queryID );
 760
 761                 currentMatchingQuery = this.findQueryMatchingCurrentState();
 762
 763                 if (
 764                         currentMatchingQuery &&
 765                         currentMatchingQuery.getID() === queryID
 766                 ) {
 767                         // If the query we want to load is the one that is already
 768                         // loaded, don't reload it
 769                         return;
 770                 }
 771
 772                 if ( this.applyParamChange( params ) ) {
 773                         // Update changes list only if there was a difference in filter selection
 774                         this.updateChangesList();
 775                 } else {
 776                         this.uriProcessor.updateURL( params );
 777                 }
 778
 779                 // Log filter grouping
 780                 this.trackFilterGroupings( 'savedfilters' );
 781         };
 782
 783         /**
 784          * Check whether the current filter and highlight state exists
 785          * in the saved queries model.
 786          *
 787          * @return {mw.rcfilters.dm.SavedQueryItemModel} Matching item model
 788          */
 789         mw.rcfilters.Controller.prototype.findQueryMatchingCurrentState = function () {
 790                 return this.savedQueriesModel.findMatchingQuery(
 791                         this.filtersModel.getCurrentParameterState( true )
 792                 );
 793         };
 794
 795         /**
 796          * Save the current state of the saved queries model with all
 797          * query item representation in the user settings.
 798          */
 799         mw.rcfilters.Controller.prototype._saveSavedQueries = function () {
 800                 var stringified, oldPrefValue,
 801                         backupPrefName = this.savedQueriesPreferenceName + '-versionbackup',
 802                         state = this.savedQueriesModel.getState();
 803
 804                 // Stringify state
 805                 stringified = JSON.stringify( state );
 806
 807                 if ( $.byteLength( stringified ) > 65535 ) {
 808                         // Sanity check, since the preference can only hold that.
 809                         return;
 810                 }
 811
 812                 if ( !this.wereSavedQueriesSaved && this.savedQueriesModel.isConverted() ) {
 813                         // The queries were converted from the previous version
 814                         // Keep the old string in the [prefname]-versionbackup
 815                         oldPrefValue = mw.user.options.get( this.savedQueriesPreferenceName );
 816
 817                         // Save the old preference in the backup preference
 818                         new mw.Api().saveOption( backupPrefName, oldPrefValue );
 819                         // Update the preference for this session
 820                         mw.user.options.set( backupPrefName, oldPrefValue );
 821                 }
 822
 823                 // Save the preference
 824                 new mw.Api().saveOption( this.savedQueriesPreferenceName, stringified );
 825                 // Update the preference for this session
 826                 mw.user.options.set( this.savedQueriesPreferenceName, stringified );
 827
 828                 // Tag as already saved so we don't do this again
 829                 this.wereSavedQueriesSaved = true;
 830         };
 831
 832         /**
 833          * Update sticky preferences with current model state
 834          */
 835         mw.rcfilters.Controller.prototype.updateStickyPreferences = function () {
 836                 // Update default sticky values with selected, whether they came from
 837                 // the initial defaults or from the URL value that is being normalized
 838                 this.updateDaysDefault( this.filtersModel.getGroup( 'days' ).getSelectedItems()[ 0 ].getParamName() );
 839                 this.updateLimitDefault( this.filtersModel.getGroup( 'limit' ).getSelectedItems()[ 0 ].getParamName() );
 840
 841                 // TODO: Make these automatic by having the model go over sticky
 842                 // items and update their default values automatically
 843         };
 844
 845         /**
 846          * Update the limit default value
 847          *
 848          * @param {number} newValue New value
 849          */
 850         mw.rcfilters.Controller.prototype.updateLimitDefault = function ( newValue ) {
 851                 this.updateNumericPreference( this.limitPreferenceName, newValue );
 852         };
 853
 854         /**
 855          * Update the days default value
 856          *
 857          * @param {number} newValue New value
 858          */
 859         mw.rcfilters.Controller.prototype.updateDaysDefault = function ( newValue ) {
 860                 this.updateNumericPreference( this.daysPreferenceName, newValue );
 861         };
 862
 863         /**
 864          * Update the group by page default value
 865          *
 866          * @param {boolean} newValue New value
 867          */
 868         mw.rcfilters.Controller.prototype.updateGroupByPageDefault = function ( newValue ) {
 869                 this.updateNumericPreference( 'usenewrc', Number( newValue ) );
 870         };
 871
 872         /**
 873          * Update a numeric preference with a new value
 874          *
 875          * @param {string} prefName Preference name
 876          * @param {number|string} newValue New value
 877          */
 878         mw.rcfilters.Controller.prototype.updateNumericPreference = function ( prefName, newValue ) {
 879                 if ( !$.isNumeric( newValue ) ) {
 880                         return;
 881                 }
 882
 883                 newValue = Number( newValue );
 884
 885                 if ( mw.user.options.get( prefName ) !== newValue ) {
 886                         // Save the preference
 887                         new mw.Api().saveOption( prefName, newValue );
 888                         // Update the preference for this session
 889                         mw.user.options.set( prefName, newValue );
 890                 }
 891         };
 892
 893         /**
 894          * Synchronize the URL with the current state of the filters
 895          * without adding an history entry.
 896          */
 897         mw.rcfilters.Controller.prototype.replaceUrl = function () {
 898                 this.uriProcessor.updateURL();
 899         };
 900
 901         /**
 902          * Update filter state (selection and highlighting) based
 903          * on current URL values.
 904          *
 905          * @param {boolean} [fetchChangesList=true] Fetch new results into the changes
 906          *  list based on the updated model.
 907          */
 908         mw.rcfilters.Controller.prototype.updateStateFromUrl = function ( fetchChangesList ) {
 909                 fetchChangesList = fetchChangesList === undefined ? true : !!fetchChangesList;
 910
 911                 this.uriProcessor.updateModelBasedOnQuery();
 912
 913                 // Update the sticky preferences, in case we received a value
 914                 // from the URL
 915                 this.updateStickyPreferences();
 916
 917                 // Only update and fetch new results if it is requested
 918                 if ( fetchChangesList ) {
 919                         this.updateChangesList();
 920                 }
 921         };
 922
 923         /**
 924          * Update the list of changes and notify the model
 925          *
 926          * @param {Object} [params] Extra parameters to add to the API call
 927          * @param {string} [updateMode='filterChange'] One of 'filterChange', 'liveUpdate', 'showNewChanges', 'markSeen'
 928          * @return {jQuery.Promise} Promise that is resolved when the update is complete
 929          */
 930         mw.rcfilters.Controller.prototype.updateChangesList = function ( params, updateMode ) {
 931                 updateMode = updateMode === undefined ? this.FILTER_CHANGE : updateMode;
 932
 933                 if ( updateMode === this.FILTER_CHANGE ) {
 934                         this.uriProcessor.updateURL( params );
 935                 }
 936                 if ( updateMode === this.FILTER_CHANGE || updateMode === this.SHOW_NEW_CHANGES ) {
 937                         this.changesListModel.invalidate();
 938                 }
 939                 this.changesListModel.setNewChangesExist( false );
 940                 this.updatingChangesList = true;
 941                 return this._fetchChangesList()
 942                         .then(
 943                                 // Success
 944                                 function ( pieces ) {
 945                                         var $changesListContent = pieces.changes,
 946                                                 $fieldset = pieces.fieldset;
 947                                         this.changesListModel.update(
 948                                                 $changesListContent,
 949                                                 $fieldset,
 950                                                 pieces.noResultsDetails,
 951                                                 false,
 952                                                 // separator between old and new changes
 953                                                 updateMode === this.SHOW_NEW_CHANGES || updateMode === this.LIVE_UPDATE
 954                                         );
 955                                 }.bind( this )
 956                                 // Do nothing for failure
 957                         )
 958                         .always( function () {
 959                                 this.updatingChangesList = false;
 960                         }.bind( this ) );
 961         };
 962
 963         /**
 964          * Get an object representing the default parameter state, whether
 965          * it is from the model defaults or from the saved queries.
 966          *
 967          * @return {Object} Default parameters
 968          */
 969         mw.rcfilters.Controller.prototype._getDefaultParams = function () {
 970                 if ( this.savedQueriesModel.getDefault() ) {
 971                         return this.savedQueriesModel.getDefaultParams();
 972                 } else {
 973                         return this.filtersModel.getDefaultParams();
 974                 }
 975         };
 976
 977         /**
 978          * Query the list of changes from the server for the current filters
 979          *
 980          * @param {string} counterId Id for this request. To allow concurrent requests
 981          *  not to invalidate each other.
 982          * @param {Object} [params={}] Parameters to add to the query
 983          *
 984          * @return {jQuery.Promise} Promise object resolved with { content, status }
 985          */
 986         mw.rcfilters.Controller.prototype._queryChangesList = function ( counterId, params ) {
 987                 var uri = this.uriProcessor.getUpdatedUri(),
 988                         stickyParams = this.filtersModel.getStickyParamsValues(),
 989                         requestId,
 990                         latestRequest;
 991
 992                 params = params || {};
 993                 params.action = 'render'; // bypasses MW chrome
 994
 995                 uri.extend( params );
 996
 997                 this.requestCounter[ counterId ] = this.requestCounter[ counterId ] || 0;
 998                 requestId = ++this.requestCounter[ counterId ];
 999                 latestRequest = function () {
1000                         return requestId === this.requestCounter[ counterId ];
1001                 }.bind( this );
1002
1003                 // Sticky parameters override the URL params
1004                 // this is to make sure that whether we represent
1005                 // the sticky params in the URL or not (they may
1006                 // be normalized out) the sticky parameters are
1007                 // always being sent to the server with their
1008                 // current/default values
1009                 uri.extend( stickyParams );
1010
1011                 return $.ajax( uri.toString(), { contentType: 'html' } )
1012                         .then(
1013                                 function ( content, message, jqXHR ) {
1014                                         if ( !latestRequest() ) {
1015                                                 return $.Deferred().reject();
1016                                         }
1017                                         return {
1018                                                 content: content,
1019                                                 status: jqXHR.status
1020                                         };
1021                                 },
1022                                 // RC returns 404 when there is no results
1023                                 function ( jqXHR ) {
1024                                         if ( latestRequest() ) {
1025                                                 return $.Deferred().resolve(
1026                                                         {
1027                                                                 content: jqXHR.responseText,
1028                                                                 status: jqXHR.status
1029                                                         }
1030                                                 ).promise();
1031                                         }
1032                                 }
1033                         );
1034         };
1035
1036         /**
1037          * Fetch the list of changes from the server for the current filters
1038          *
1039          * @return {jQuery.Promise} Promise object that will resolve with the changes list
1040          *  and the fieldset.
1041          */
1042         mw.rcfilters.Controller.prototype._fetchChangesList = function () {
1043                 return this._queryChangesList( 'updateChangesList' )
1044                         .then(
1045                                 function ( data ) {
1046                                         var $parsed;
1047
1048                                         // Status code 0 is not HTTP status code,
1049                                         // but is valid value of XMLHttpRequest status.
1050                                         // It is used for variety of network errors, for example
1051                                         // when an AJAX call was cancelled before getting the response
1052                                         if ( data && data.status === 0 ) {
1053                                                 return {
1054                                                         changes: 'NO_RESULTS',
1055                                                         // We need empty result set, to avoid exceptions because of undefined value
1056                                                         fieldset: $( [] ),
1057                                                         noResultsDetails: 'NO_RESULTS_NETWORK_ERROR'
1058                                                 };
1059                                         }
1060
1061                                         $parsed = $( '<div>' ).append( $( $.parseHTML(
1062                                                 data ? data.content : ''
1063                                         ) ) );
1064
1065                                         return this._extractChangesListInfo( $parsed, data.status );
1066                                 }.bind( this )
1067                         );
1068         };
1069
1070         /**
1071          * Track usage of highlight feature
1072          *
1073          * @param {string} action
1074          * @param {Array|Object|string} filters
1075          */
1076         mw.rcfilters.Controller.prototype._trackHighlight = function ( action, filters ) {
1077                 filters = typeof filters === 'string' ? { name: filters } : filters;
1078                 filters = !Array.isArray( filters ) ? [ filters ] : filters;
1079                 mw.track(
1080                         'event.ChangesListHighlights',
1081                         {
1082                                 action: action,
1083                                 filters: filters,
1084                                 userId: mw.user.getId()
1085                         }
1086                 );
1087         };
1088
1089         /**
1090          * Track filter grouping usage
1091          *
1092          * @param {string} action Action taken
1093          */
1094         mw.rcfilters.Controller.prototype.trackFilterGroupings = function ( action ) {
1095                 var controller = this,
1096                         rightNow = new Date().getTime(),
1097                         randomIdentifier = String( mw.user.sessionId() ) + String( rightNow ) + String( Math.random() ),
1098                         // Get all current filters
1099                         filters = this.filtersModel.getSelectedItems().map( function ( item ) {
1100                                 return item.getName();
1101                         } );
1102
1103                 action = action || 'filtermenu';
1104
1105                 // Check if these filters were the ones we just logged previously
1106                 // (Don't log the same grouping twice, in case the user opens/closes)
1107                 // the menu without action, or with the same result
1108                 if (
1109                         // Only log if the two arrays are different in size
1110                         filters.length !== this.prevLoggedItems.length ||
1111                         // Or if any filters are not the same as the cached filters
1112                         filters.some( function ( filterName ) {
1113                                 return controller.prevLoggedItems.indexOf( filterName ) === -1;
1114                         } ) ||
1115                         // Or if any cached filters are not the same as given filters
1116                         this.prevLoggedItems.some( function ( filterName ) {
1117                                 return filters.indexOf( filterName ) === -1;
1118                         } )
1119                 ) {
1120                         filters.forEach( function ( filterName ) {
1121                                 mw.track(
1122                                         'event.ChangesListFilterGrouping',
1123                                         {
1124                                                 action: action,
1125                                                 groupIdentifier: randomIdentifier,
1126                                                 filter: filterName,
1127                                                 userId: mw.user.getId()
1128                                         }
1129                                 );
1130                         } );
1131
1132                         // Cache the filter names
1133                         this.prevLoggedItems = filters;
1134                 }
1135         };
1136
1137         /**
1138          * Apply a change of parameters to the model state, and check whether
1139          * the new state is different than the old state.
1140          *
1141          * @param  {Object} newParamState New parameter state to apply
1142          * @return {boolean} New applied model state is different than the previous state
1143          */
1144         mw.rcfilters.Controller.prototype.applyParamChange = function ( newParamState ) {
1145                 var after,
1146                         before = this.filtersModel.getSelectedState();
1147
1148                 this.filtersModel.updateStateFromParams( newParamState );
1149
1150                 after = this.filtersModel.getSelectedState();
1151
1152                 return !OO.compare( before, after );
1153         };
1154
1155         /**
1156          * Mark all changes as seen on Watchlist
1157          */
1158         mw.rcfilters.Controller.prototype.markAllChangesAsSeen = function () {
1159                 var api = new mw.Api();
1160                 api.postWithToken( 'csrf', {
1161                         formatversion: 2,
1162                         action: 'setnotificationtimestamp',
1163                         entirewatchlist: true
1164                 } ).then( function () {
1165                         this.updateChangesList( null, 'markSeen' );
1166                 }.bind( this ) );
1167         };
1168
1169         /**
1170          * Set the current search for the system.
1171          *
1172          * @param {string} searchQuery Search query, including triggers
1173          */
1174         mw.rcfilters.Controller.prototype.setSearch = function ( searchQuery ) {
1175                 this.filtersModel.setSearch( searchQuery );
1176         };
1177
1178         /**
1179          * Switch the view by changing the search query trigger
1180          * without changing the search term
1181          *
1182          * @param  {string} view View to change to
1183          */
1184         mw.rcfilters.Controller.prototype.switchView = function ( view ) {
1185                 this.setSearch(
1186                         this.filtersModel.getViewTrigger( view ) +
1187                         this.filtersModel.removeViewTriggers( this.filtersModel.getSearch() )
1188                 );
1189         };
1190
1191         /**
1192          * Reset the search for a specific view. This means we null the search query
1193          * and replace it with the relevant trigger for the requested view
1194          *
1195          * @param  {string} [view='default'] View to change to
1196          */
1197         mw.rcfilters.Controller.prototype.resetSearchForView = function ( view ) {
1198                 view = view || 'default';
1199
1200                 this.setSearch(
1201                         this.filtersModel.getViewTrigger( view )
1202                 );
1203         };
1204 }( mediaWiki, jQuery ) );