160 lines
4.8 KiB
JavaScript
160 lines
4.8 KiB
JavaScript
/*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
(function() {
|
|
'use strict';
|
|
|
|
angular
|
|
.module('horizon.framework.util.q')
|
|
.factory('horizon.framework.util.q.extensions', qExtensions);
|
|
|
|
qExtensions.$inject = ['$q'];
|
|
|
|
/**
|
|
* @ngdoc factory
|
|
* @name horizon.framework.util.q:extensions
|
|
* @module horizon.framework.util.q
|
|
* @kind function
|
|
* @description
|
|
*
|
|
* Extends the $q from Angular to provide additional functionality.
|
|
*
|
|
*/
|
|
function qExtensions($q) {
|
|
var service = {
|
|
allSettled: allSettled,
|
|
booleanAsPromise: booleanAsPromise
|
|
};
|
|
|
|
return service;
|
|
|
|
/**
|
|
* Allow all given promises to settle and returns a collection
|
|
* of the successful and failed responses allowing the caller
|
|
* to make decisions based on the individual results.
|
|
*
|
|
* This function is typically used if you need all promises
|
|
* to complete and get all of the success and response messages,
|
|
* but need to correlate specific success and failure results
|
|
* to a particular context. To do this, ensure that the passed
|
|
* in promise has a context attribute available on the input
|
|
* promise. Each result or failure reason will include the
|
|
* context in the fail or pass array.
|
|
*
|
|
* It will always result in a success callback (resolved),
|
|
* but will provide a summary object of the results in a pair
|
|
* of arrays ("pass" and "fail"), even if some of the promises fail.
|
|
* The "pass" array will contain each of the results of the
|
|
* successfully resolved promises and the "fail" array
|
|
* will return each of the reasons for the rejected promises.
|
|
*
|
|
* In contrast to the `$q.all` in Angular which will terminate all
|
|
* promises if any promise is rejected, this will wait for all promises
|
|
* to settle.
|
|
*
|
|
* The order of the resolve or rejection reasons correlates directly to
|
|
* the order of the promises in the list.
|
|
*
|
|
* @param {array} promiseList
|
|
* The list of promises to resolve
|
|
*
|
|
* @return {object}
|
|
* An object with 2 lists, one for promises that got resolved
|
|
* and one for promises that got rejected.
|
|
*
|
|
* @example
|
|
* ```
|
|
* var settledPromises = qExtenstions.allSettled([
|
|
* {promise: promise1, context: context1},
|
|
* {promise: promise2, context: context2}
|
|
* ]);
|
|
* settledPromises.then(onSettled);
|
|
*
|
|
* function onSettled(data) {
|
|
* doSomething(data.pass);
|
|
* doSomething(data.fail);
|
|
* }
|
|
*
|
|
* function doSomething(resolvedList) {
|
|
* resolvedList.forEach(function (item) {
|
|
* console.log("context", item.context, "result", item.data);
|
|
* });
|
|
* }
|
|
*/
|
|
function allSettled(promiseList) {
|
|
var deferred = $q.defer();
|
|
var passList = [];
|
|
var failList = [];
|
|
var promises = promiseList.map(resolveSingle);
|
|
|
|
$q.all(promises).then(onComplete);
|
|
return deferred.promise;
|
|
|
|
function resolveSingle(singlePromise, index) {
|
|
var deferredInner = $q.defer();
|
|
singlePromise.promise.then(onResolve, onReject);
|
|
return deferredInner.promise;
|
|
|
|
function onResolve(response) {
|
|
passList[index] = formatResponse(response, singlePromise.context);
|
|
deferredInner.resolve();
|
|
}
|
|
|
|
function onReject(response) {
|
|
failList[index] = formatResponse(response, singlePromise.context);
|
|
deferredInner.resolve();
|
|
}
|
|
|
|
function formatResponse(response, context) {
|
|
return {
|
|
data: response,
|
|
context: context
|
|
};
|
|
}
|
|
}
|
|
|
|
function onComplete() {
|
|
deferred.resolve({pass: condense(passList), fail: condense(failList)});
|
|
}
|
|
|
|
function condense(promiseList) {
|
|
return promiseList.filter(function removeEmpty(promise) {
|
|
return !!promise;
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a promise that resolves if true, otherwise is rejected.
|
|
*
|
|
* @param {expression} value
|
|
* the boolean value to test
|
|
*
|
|
* @return {promise}
|
|
* the promise object
|
|
*/
|
|
function booleanAsPromise(value) {
|
|
var deferred = $q.defer();
|
|
|
|
if (value === true) {
|
|
deferred.resolve();
|
|
} else {
|
|
deferred.reject();
|
|
}
|
|
|
|
return deferred.promise;
|
|
}
|
|
|
|
}
|
|
})();
|