1 files changed, 166 insertions, 0 deletions
diff --git a/www/wiki/resources/src/mediawiki.rcfilters/dm/mw.rcfilters.dm.ChangesListViewModel.js b/www/wiki/resources/src/mediawiki.rcfilters/dm/mw.rcfilters.dm.ChangesListViewModel.js
new file mode 100644
index 00000000..96b44100
--- /dev/null
+++ b/www/wiki/resources/src/mediawiki.rcfilters/dm/mw.rcfilters.dm.ChangesListViewModel.js
@@ -0,0 +1,166 @@
+( function ( mw ) {
+	/**
+	 * View model for the changes list
+	 *
+	 * @mixins OO.EventEmitter
+	 *
+	 * @param {jQuery} $initialFieldset The initial server-generated legacy form content
+	 * @constructor
+	 */
+	mw.rcfilters.dm.ChangesListViewModel = function MwRcfiltersDmChangesListViewModel( $initialFieldset ) {
+		// Mixin constructor
+		OO.EventEmitter.call( this );
+
+		this.valid = true;
+		this.newChangesExist = false;
+		this.liveUpdate = false;
+		this.unseenWatchedChanges = false;
+
+		this.extractNextFrom( $initialFieldset );
+	};
+
+	/* Initialization */
+	OO.initClass( mw.rcfilters.dm.ChangesListViewModel );
+	OO.mixinClass( mw.rcfilters.dm.ChangesListViewModel, OO.EventEmitter );
+
+	/* Events */
+
+	/**
+	 * @event invalidate
+	 *
+	 * The list of changes is now invalid (out of date)
+	 */
+
+	/**
+	 * @event update
+	 * @param {jQuery|string} $changesListContent List of changes
+	 * @param {jQuery} $fieldset Server-generated form
+	 * @param {string} noResultsDetails Type of no result error
+	 * @param {boolean} isInitialDOM Whether the previous dom variables are from the initial page load
+	 * @param {boolean} fromLiveUpdate These are new changes fetched via Live Update
+	 *
+	 * The list of changes has been updated
+	 */
+
+	/**
+	 * @event newChangesExist
+	 * @param {boolean} newChangesExist
+	 *
+	 * The existence of changes newer than those currently displayed has changed.
+	 */
+
+	/**
+	 * @event liveUpdateChange
+	 * @param {boolean} enable
+	 *
+	 * The state of the 'live update' feature has changed.
+	 */
+
+	/* Methods */
+
+	/**
+	 * Invalidate the list of changes
+	 *
+	 * @fires invalidate
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.invalidate = function () {
+		if ( this.valid ) {
+			this.valid = false;
+			this.emit( 'invalidate' );
+		}
+	};
+
+	/**
+	 * Update the model with an updated list of changes
+	 *
+	 * @param {jQuery|string} changesListContent
+	 * @param {jQuery} $fieldset
+	 * @param {string} noResultsDetails Type of no result error
+	 * @param {boolean} [isInitialDOM] Using the initial (already attached) DOM elements
+	 * @param {boolean} [separateOldAndNew] Whether a logical separation between old and new changes is needed
+	 * @fires update
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.update = function ( changesListContent, $fieldset, noResultsDetails, isInitialDOM, separateOldAndNew ) {
+		var from = this.nextFrom;
+		this.valid = true;
+		this.extractNextFrom( $fieldset );
+		this.checkForUnseenWatchedChanges( changesListContent );
+		this.emit( 'update', changesListContent, $fieldset, noResultsDetails, isInitialDOM, separateOldAndNew ? from : null );
+	};
+
+	/**
+	 * Specify whether new changes exist
+	 *
+	 * @param {boolean} newChangesExist
+	 * @fires newChangesExist
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.setNewChangesExist = function ( newChangesExist ) {
+		if ( newChangesExist !== this.newChangesExist ) {
+			this.newChangesExist = newChangesExist;
+			this.emit( 'newChangesExist', newChangesExist );
+		}
+	};
+
+	/**
+	 * @return {boolean} Whether new changes exist
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.getNewChangesExist = function () {
+		return this.newChangesExist;
+	};
+
+	/**
+	 * Extract the value of the 'from' parameter from a link in the field set
+	 *
+	 * @param {jQuery} $fieldset
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.extractNextFrom = function ( $fieldset ) {
+		var data = $fieldset.find( '.rclistfrom > a, .wlinfo' ).data( 'params' );
+		if ( data && data.from ) {
+			this.nextFrom = data.from;
+		}
+	};
+
+	/**
+	 * @return {string} The 'from' parameter that can be used to query new changes
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.getNextFrom = function () {
+		return this.nextFrom;
+	};
+
+	/**
+	 * Toggle the 'live update' feature on/off
+	 *
+	 * @param {boolean} enable
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.toggleLiveUpdate = function ( enable ) {
+		enable = enable === undefined ? !this.liveUpdate : enable;
+		if ( enable !== this.liveUpdate ) {
+			this.liveUpdate = enable;
+			this.emit( 'liveUpdateChange', this.liveUpdate );
+		}
+	};
+
+	/**
+	 * @return {boolean} The 'live update' feature is enabled
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.getLiveUpdate = function () {
+		return this.liveUpdate;
+	};
+
+	/**
+	 * Check if some of the given changes watched and unseen
+	 *
+	 * @param {jQuery|string} changeslistContent
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.checkForUnseenWatchedChanges = function ( changeslistContent ) {
+		this.unseenWatchedChanges = changeslistContent !== 'NO_RESULTS' &&
+			changeslistContent.find( '.mw-changeslist-line-watched' ).length > 0;
+	};
+
+	/**
+	 * @return {boolean} Whether some of the current changes are watched and unseen
+	 */
+	mw.rcfilters.dm.ChangesListViewModel.prototype.hasUnseenWatchedChanges = function () {
+		return this.unseenWatchedChanges;
+	};
+}( mediaWiki ) );