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mw.echo.ui.NotificationsListWidget.js
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mw.echo.ui.NotificationsListWidget.js
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( function () {
/**
* Notifications list widget.
* All of its items must be of the mw.echo.ui.NotificationItem type.
*
* @class
* @extends mw.echo.ui.SortedListWidget
*
* @constructor
* @param {mw.echo.Controller} controller Echo notifications controller
* @param {mw.echo.dm.ModelManager} manager Model manager
* @param {Object} [config] Configuration object
* marked as read when they are seen.
* @param {string} [config.timestamp=0] A timestamp representing the latest item in
* the list.
* @param {jQuery} [config.$overlay] A jQuery element functioning as an overlay
* for popups.
*/
mw.echo.ui.NotificationsListWidget = function MwEchoUiNotificationsListWidget( controller, manager, config ) {
config = config || {};
// Parent constructor
mw.echo.ui.NotificationsListWidget.super.call(
this,
// Sorting callback
( a, b ) => {
if ( !a.isRead() && b.isRead() ) {
return -1; // Unread items are always above read items
} else if ( a.isRead() && !b.isRead() ) {
return 1;
} else if ( !a.isForeign() && b.isForeign() ) {
return -1;
} else if ( a.isForeign() && !b.isForeign() ) {
return 1;
}
// Reverse sorting
if ( b.getTimestamp() < a.getTimestamp() ) {
return -1;
} else if ( b.getTimestamp() > a.getTimestamp() ) {
return 1;
}
// Fallback on IDs
return b.getId() - a.getId();
},
config
);
// Initialize models
this.controller = controller;
this.manager = manager;
this.models = {};
// Properties
this.$overlay = config.$overlay || this.$element;
this.timestamp = config.timestamp || 0;
// Dummy 'loading' option widget
this.loadingOptionWidget = new mw.echo.ui.PlaceholderItemWidget();
this.resetLoadingOption();
this.manager.connect( this, {
update: 'resetDataFromModel',
discard: 'onModelManagerDiscard'
} );
this.$element
.addClass( 'mw-echo-ui-notificationsListWidget' );
};
/* Initialization */
OO.inheritClass( mw.echo.ui.NotificationsListWidget, mw.echo.ui.SortedListWidget );
/* Events */
/**
* The content of this list has changed.
* This event is to state that not only has the content changed
* but the actual DOM has been manipulated.
*
* @event mw.echo.ui.NotificationsListWidget#modified
*/
/* Methods */
mw.echo.ui.NotificationsListWidget.prototype.onModelManagerDiscard = function ( modelName ) {
const items = this.getItems();
// For the moment, this is only relevant for xwiki bundles.
// Local single items will not get their entire model removed, but
// local bundles may - when that happens, the condition below should
// also deal with local bundles and removing them specifically
if ( modelName === 'xwiki' ) {
for ( let i = 0; i < items.length; i++ ) {
if ( items[ i ] instanceof mw.echo.ui.CrossWikiNotificationItemWidget ) {
this.removeItems( [ items[ i ] ] );
this.checkForEmptyNotificationsList();
return;
}
}
}
this.emit( 'modified' );
};
/**
* Respond to model manager update event.
* This event means we are repopulating the entire list and the
* associated models within it.
*
* @param {Object} models Object of new models to populate the
* list.
* @fires mw.echo.ui.NotificationsListWidget#modified
*/
mw.echo.ui.NotificationsListWidget.prototype.resetDataFromModel = function ( models ) {
const itemWidgets = [];
let $elements = $();
// Detach all attached models
for ( const modelId in this.models ) {
this.detachModel( modelId );
}
// Attach and process new models
for ( const modelId in models ) {
const model = models[ modelId ];
this.attachModel( modelId, model );
// Build widgets based on the data in the model
if ( model.isGroup() ) {
let widget;
if ( model.isForeign() ) {
// One Widget to Rule Them All
widget = new mw.echo.ui.CrossWikiNotificationItemWidget(
this.controller,
model,
{
$overlay: this.$overlay,
animateSorting: this.animated
}
);
} else {
// local bundle
widget = new mw.echo.ui.BundleNotificationItemWidget(
this.controller,
model,
{
$overlay: this.$overlay,
bundle: false,
animateSorting: this.animated
}
);
}
itemWidgets.push( widget );
$elements = $elements.add( widget.$element );
} else {
const subItems = model.getItems();
// Separate widgets per item
for ( let i = 0; i < subItems.length; i++ ) {
const subItem = subItems[ i ];
const widget = new mw.echo.ui.SingleNotificationItemWidget(
this.controller,
subItem,
{
$overlay: this.$overlay,
bundle: false
}
);
itemWidgets.push( widget );
$elements = $elements.add( widget.$element );
}
}
}
// Reset the current items and re-add the new item widgets
this.clearItems();
// fire render hook
mw.hook( 'ext.echo.notifications.beforeRender' ).fire( this.$element, $elements );
this.addItems( itemWidgets );
this.checkForEmptyNotificationsList();
this.emit( 'modified' );
};
/**
* Attach a model to the widget
*
* @param {string} modelId Symbolic name for the model
* @param {mw.echo.dm.SortedList} model Notifications list model
*/
mw.echo.ui.NotificationsListWidget.prototype.attachModel = function ( modelId, model ) {
this.models[ modelId ] = model;
};
/**
* Detach a model from the widget
*
* @param {string} modelId Notifications list model
*/
mw.echo.ui.NotificationsListWidget.prototype.detachModel = function ( modelId ) {
this.models[ modelId ].disconnect( this );
delete this.models[ modelId ];
};
/**
* Reset the loading 'dummy' option widget
*
* @param {string} [label] Label for the option widget
* @param {string} [link] Link for the option widget
* @fires mw.echo.ui.NotificationsListWidget#modified
*/
mw.echo.ui.NotificationsListWidget.prototype.resetLoadingOption = function ( label, link ) {
this.loadingOptionWidget.setLabel( label || '' );
this.loadingOptionWidget.setLink( link || '' );
if ( this.isEmpty() ) {
this.addItems( [ this.loadingOptionWidget ] );
}
this.emit( 'modified' );
};
/**
* Check if the list of notifications is empty and udpate the placeholder
* widget as needed.
*/
mw.echo.ui.NotificationsListWidget.prototype.checkForEmptyNotificationsList = function () {
this.resetLoadingOption( this.isEmpty() ? mw.msg( 'echo-notification-placeholder' ) : '' );
};
/**
* Reset the 'initiallyUnseen' state of all items
*/
mw.echo.ui.NotificationsListWidget.prototype.resetInitiallyUnseenItems = function () {
const itemWidgets = this.getItems();
for ( let i = 0; i < itemWidgets.length; i++ ) {
itemWidgets[ i ].resetInitiallyUnseen();
}
};
}() );

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