/*
* @copyright
* Copyright © Microsoft Open Technologies, Inc.
*
* All Rights Reserved
*
* 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
*
* THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS
* OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
* ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A
* PARTICULAR PURPOSE, MERCHANTABILITY OR NON-INFRINGEMENT.
*
* See the Apache License, Version 2.0 for the specific language
* governing permissions and limitations under the License.
*/
'use strict';
var _ = require('underscore');
/**
* Constructs a new in memory token cache.
* @constructor
*/
function MemoryCache() {
this._entries = [];
}
/**
* Removes a collection of entries from the cache in a single batch operation.
* @param {Array} entries An array of cache entries to remove.
* @param {Function} callback This function is called when the operation is complete. Any error is provided as the
* first parameter.
*/
MemoryCache.prototype.remove = function(entries, callback) {
var updatedEntries = _.filter(this._entries, function(element) {
if (_.findWhere(entries, element)) {
return false;
}
return true;
});
this._entries = updatedEntries;
callback();
};
/**
* Adds a collection of entries to the cache in a single batch operation.
* @param {Array} entries An array of entries to add to the cache.
* @param {Function} callback This function is called when the operation is complete. Any error is provided as the
* first parameter.
*/
MemoryCache.prototype.add = function(entries, callback) {
// Remove any entries that are duplicates of the existing
// cache elements.
_.each(this._entries, function(element) {
_.each(entries, function(addElement, index) {
Iif (_.isEqual(element, addElement)) {
entries[index] = null;
}
});
});
// Add the new entries to the end of the cache.
entries = _.compact(entries);
for (var i = 0; i < entries.length; i++) {
this._entries.push(entries[i]);
}
callback(null, true);
};
/**
* Finds all entries in the cache that match all of the passed in values.
* @param {object} query This object will be compared to each entry in the cache. Any entries that
* match all of the values in this object will be returned. All the values
* in the passed in object must match values in a potentialy returned object
* exactly. The returned object may have more values than the passed in query
* object.
* @param {TokenCacheFindCallback} callback
*/
MemoryCache.prototype.find = function(query, callback) {
var results = _.where(this._entries, query);
callback(null, results);
};
module.exports = MemoryCache; |