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( function () {
/**
* Pagination model for echo notifications pages.
*
* @class
* @mixins OO.EventEmitter
*
* @constructor
* @param {Object} config Configuration object
* @cfg {string} [pageNext] The continue value of the next page
* @cfg {number} [itemsPerPage] The number of items per page
* @cfg {number} [currentPageItemCount] The number of items that are in the
* current page. If not given, the initial count defaults to the total number
* of items per page.
*/
mw.echo.dm.PaginationModel = function MwEchoDmPaginationModel( config ) {
config = config || {};
// Mixin constructor
OO.EventEmitter.call( this );
this.pagesContinue = [];
this.itemsPerPage = config.itemsPerPage || 25;
this.currentPageItemCount = config.currentPageItemCount || this.itemsPerPage;
// Set initial page
this.currPageIndex = 0;
this.pagesContinue[ 0 ] = '';
// If a next page is given, fill it
if ( config.pageNext ) {
this.setPageContinue( 1, config.pageNext );
}
};
/* Initialization */
OO.initClass( mw.echo.dm.PaginationModel );
OO.mixinClass( mw.echo.dm.PaginationModel, OO.EventEmitter );
/* Events */
/**
* @event update
*
* Pagination information was updated
*/
/* Methods */
/**
* Reset pagination data
*
* @fires update
*/
mw.echo.dm.PaginationModel.prototype.reset = function () {
this.pagesContinue = [];
this.currPageIndex = 0;
this.currentPageItemCount = this.itemsPerPage;
this.emit( 'update' );
};
/**
* Set a page index with its 'continue' value, used for API fetching
*
* @param {number} page Page index
* @param {string} continueVal Continue string value
*/
mw.echo.dm.PaginationModel.prototype.setPageContinue = function ( page, continueVal ) {
if ( this.pagesContinue[ page ] !== continueVal ) {
this.pagesContinue[ page ] = continueVal;
this.emit( 'update' );
}
};
/**
* Get the 'continue' value of a certain page
*
* @param {number} page Page index
* @return {string} Continue string value
*/
mw.echo.dm.PaginationModel.prototype.getPageContinue = function ( page ) {
return this.pagesContinue[ page ];
};
/**
* Get the current page index
*
* @return {number} Current page index
*/
mw.echo.dm.PaginationModel.prototype.getCurrPageIndex = function () {
return this.currPageIndex;
};
/**
* Set the current page index
*
* @private
* @param {number} index Current page index
*/
mw.echo.dm.PaginationModel.prototype.setCurrPageIndex = function ( index ) {
this.currPageIndex = index;
};
/**
* Move forward to the next page
*
* @fires update
*/
mw.echo.dm.PaginationModel.prototype.forwards = function () {
if ( this.hasNextPage() ) {
this.setCurrPageIndex( this.currPageIndex + 1 );
this.emit( 'update' );
}
};
/**
* Move backwards to the previous page
*
* @fires update
*/
mw.echo.dm.PaginationModel.prototype.backwards = function () {
if ( this.hasPrevPage() ) {
this.setCurrPageIndex( this.currPageIndex - 1 );
this.emit( 'update' );
}
};
/**
* Get the previous page continue value
*
* @return {string} Previous page continue value
*/
mw.echo.dm.PaginationModel.prototype.getPrevPageContinue = function () {
return this.pagesContinue[ this.currPageIndex - 1 ] || '';
};
/**
* Get the current page continue value
*
* @return {string} Current page continue value
*/
mw.echo.dm.PaginationModel.prototype.getCurrPageContinue = function () {
return this.pagesContinue[ this.currPageIndex ] || '';
};
/**
* Get the next page continue value
*
* @return {string} Next page continue value
*/
mw.echo.dm.PaginationModel.prototype.getNextPageContinue = function () {
return this.pagesContinue[ this.currPageIndex + 1 ] || '';
};
/**
* Set the next page continue value
*
* @param {string} cont Next page continue value
*/
mw.echo.dm.PaginationModel.prototype.setNextPageContinue = function ( cont ) {
this.setPageContinue( this.currPageIndex + 1, cont );
};
/**
* Check whether a previous page exists
*
* @return {boolean} Previous page exists
*/
mw.echo.dm.PaginationModel.prototype.hasPrevPage = function () {
return this.currPageIndex > 0;
};
/**
* Check whether a next page exists
*
* @return {boolean} Next page exists
*/
mw.echo.dm.PaginationModel.prototype.hasNextPage = function () {
return !!this.pagesContinue[ this.currPageIndex + 1 ];
};
/**
* Set the number of items in the current page
*
* @param {number} count Number of items
* @fires update
*/
mw.echo.dm.PaginationModel.prototype.setCurrentPageItemCount = function ( count ) {
if ( this.currentPageItemCount !== count ) {
this.currentPageItemCount = count;
this.emit( 'update' );
}
};
/**
* Get the number of items in the current page
*
* @return {number} Number of items
*/
mw.echo.dm.PaginationModel.prototype.getCurrentPageItemCount = function () {
return this.currentPageItemCount;
};
/**
* Set the number of items per page
*
* @param {number} count Number of items per page
*/
mw.echo.dm.PaginationModel.prototype.setItemsPerPage = function ( count ) {
this.itemsPerPage = count;
};
/**
* Get the number of items per page
*
* @return {number} Number of items per page
*/
mw.echo.dm.PaginationModel.prototype.getItemsPerPage = function () {
return this.itemsPerPage;
};
}() );
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