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/*****************************************************************************
* Open MCT, Copyright (c) 2014-2021, United States Government
* as represented by the Administrator of the National Aeronautics and Space
* Administration. All rights reserved.
*
* Open MCT is 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.
*
* Open MCT includes source code licensed under additional open source
* licenses. See the Open Source Licenses file (LICENSES.md) included with
* this source code distribution or the Licensing information page available
* at runtime from the About dialog for additional information.
*****************************************************************************/
define(
[],
function () {
'use strict';
/**
* The ScratchPersistenceProvider keeps JSON documents in memory
* and provides a persistence interface, but changes are lost on reload.
* @memberof example/scratchpad
* @constructor
* @implements {PersistenceService}
* @param q Angular's $q, for promises
*/
function ScratchPersistenceProvider($q) {
this.$q = $q;
this.table = {};
}
ScratchPersistenceProvider.prototype.listSpaces = function () {
return this.$q.when(['scratch']);
};
ScratchPersistenceProvider.prototype.listObjects = function (space) {
return this.$q.when(
space === 'scratch' ? Object.keys(this.table) : []
);
};
ScratchPersistenceProvider.prototype.createObject = function (space, key, value) {
if (space === 'scratch') {
this.table[key] = JSON.stringify(value);
}
return this.$q.when(space === 'scratch');
};
ScratchPersistenceProvider.prototype.readObject = function (space, key) {
return this.$q.when(
(space === 'scratch' && this.table[key])
? JSON.parse(this.table[key]) : undefined
);
};
ScratchPersistenceProvider.prototype.deleteObject = function (space, key, value) {
if (space === 'scratch') {
delete this.table[key];
}
return this.$q.when(space === 'scratch');
};
ScratchPersistenceProvider.prototype.updateObject =
ScratchPersistenceProvider.prototype.createObject;
return ScratchPersistenceProvider;
}
);
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