jquery.ajaxdispatcher.js
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

jquery.ajaxdispatcher.js
View Options

	( function () {
	'use strict';

	/**
	* Call list of callbacks returning promises in serial order and returns a list of promises.
	*
	* @internal
	* @author Niklas Laxström
	*
	* @param {Function[]} list List of callbacks returning promises.
	* @param {number} maxRetries Maximum number of times a failed promise is retried.
	* @return {jQuery.Promise}
	*/
	function ajaxDispatcher( list, maxRetries ) {
	var deferred = $.Deferred();

	maxRetries = maxRetries \|\| 0;

	return $.when( helper( list, maxRetries ) )
	.then( function ( promises ) {
	return deferred.resolve( promises );
	} ).fail( function ( errmsg ) {
	return deferred.reject( errmsg );
	} );
	}

	function helper( list, maxRetries ) {
	var deferred = $.Deferred();

	if ( list.length === 0 ) {
	deferred.resolve( [] );
	return deferred;
	}

	var first = list.slice( 0, 1 )[ 0 ];
	var rest = list.slice( 1 );

	var retries = 0;
	var retrier = function ( result, promise ) {
	if ( !promise.state ) {
	return;
	}

	if ( promise.state() === 'rejected' ) {
	if ( retries < maxRetries ) {
	retries += 1;
	return first.call().always( retrier );
	}
	}

	if ( promise.state() !== 'pending' ) {
	helper( rest, maxRetries ).always( function ( promises ) {
	deferred.resolve( [].concat( promise, promises ) );
	} );
	}
	};

	first.call().always( retrier ).catch( function ( errmsg ) {
	return deferred.reject( errmsg );
	} );

	return deferred;
	}

	$.extend( $, { ajaxDispatcher: ajaxDispatcher } );

	}() );