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mw.echo.dm.NotificationGroupsList.js
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mw.echo.dm.NotificationGroupsList.js
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( function () {
/**
* Notification groups list data structure.
* It contains mw.echo.dm.NotificationsList items
*
* This contains a list of grouped notifications by source, and
* serves as a list of lists for cross-wiki notifications based
* on their remote sources and/or wikis.
*
* @class
* @extends mw.echo.dm.SortedList
*
* @constructor
* @param {Object} [config] Configuration options
* @param {boolean} [config.foreign] The list contains foreign notifications
*/
mw.echo.dm.NotificationGroupsList = function MwEchoDmNotificationGroupsList( config ) {
config = config || {};
// Parent constructor
mw.echo.dm.NotificationGroupsList.super.call( this );
// Sorting callback
this.setSortingCallback( ( a, b ) => {
// Reverse sorting
if ( b.getTimestamp() < a.getTimestamp() ) {
return -1;
} else if ( b.getTimestamp() > a.getTimestamp() ) {
return 1;
}
// Fallback on Source
return b.getName() - a.getName();
} );
this.foreign = !!config.foreign;
this.groups = {};
this.aggregate( { discard: 'groupDiscardItem' } );
this.connect( this, { groupDiscardItem: 'onGroupDiscardItem' } );
};
/* Initialization */
OO.inheritClass( mw.echo.dm.NotificationGroupsList, mw.echo.dm.SortedList );
/* Events */
/**
* A group was permanently removed
*
* @event mw.echo.dm.NotificationGroupsList#discard
*/
/* Methods */
/**
* Handle a discard event from any list.
* This means that one of the sources has discarded an item.
*
* @param {mw.echo.dm.NotificationsList} groupList List source model for the item
*/
mw.echo.dm.NotificationGroupsList.prototype.onGroupDiscardItem = function ( groupList ) {
// Check if the list has anything at all
if ( groupList.isEmpty() ) {
// Remove it
this.removeGroup( groupList.getName() );
}
};
/**
* Add a group to the list. This is a more convenient alias to using
* addItems()
*
* @param {string} groupSource Symbolic name for the source of
* this group, to be recognized for API operations
* @param {Object} sourceData Source data
* @param {mw.echo.dm.NotificationItem[]} [groupItems] Optional items to add to this group
*/
mw.echo.dm.NotificationGroupsList.prototype.addGroup = function ( groupSource, sourceData, groupItems ) {
const groupListModel = new mw.echo.dm.NotificationsList( {
title: sourceData.title,
name: groupSource,
source: groupSource,
sourceURL: sourceData.base,
timestamp: sourceData.ts
} );
if ( Array.isArray( groupItems ) && groupItems.length > 0 ) {
groupListModel.addItems( groupItems );
}
// Add the group
this.addItems( [ groupListModel ] );
};
/**
* Get the timestamp of the list by taking the latest list's
* timestamp.
*
* @return {string} Latest timestamp
*/
mw.echo.dm.NotificationGroupsList.prototype.getTimestamp = function () {
const items = this.getItems();
return (
items.length > 0 ?
items[ 0 ].getTimestamp() :
0
);
};
/**
* Add items to a specific group by its source identifier.
*
* @param {string} groupSource Source identifier of the group
* @param {mw.echo.dm.NotificationItem[]} groupItems Items to add to this group
*/
mw.echo.dm.NotificationGroupsList.prototype.addItemsToGroup = function ( groupSource, groupItems ) {
const group = this.getGroupByName( groupSource );
if ( group ) {
group.addItems( groupItems );
}
};
/**
* Remove a group from the list. This is an easier to use alias
* to 'removeItems()' method.
*
* Since this is an intentional action, we fire 'discard' event.
* The main reason for this is that the event 'remove' is a general
* event that is fired both when a user intends on removing an
* item and also when an item is temporarily removed to be re-added
* for the sake of sorting. To avoid ambiguity, we use 'discard' event.
*
* @param {string} groupName Group name
* @fires mw.echo.dm.NotificationGroupsList#discard
*/
mw.echo.dm.NotificationGroupsList.prototype.removeGroup = function ( groupName ) {
const group = this.getGroupByName( groupName );
if ( group ) {
this.removeItems( group );
this.emit( 'discard', group );
}
};
/**
* Get a group by its source identifier.
*
* @param {string} groupName Group name
* @return {mw.echo.dm.NotificationsList|null} Requested group, null if none was found.
*/
mw.echo.dm.NotificationGroupsList.prototype.getGroupByName = function ( groupName ) {
const items = this.getItems();
for ( let i = 0; i < items.length; i++ ) {
if ( items[ i ].getName() === groupName ) {
return items[ i ];
}
}
return null;
};
}() );

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