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76 lines
2.7 KiB
JavaScript
76 lines
2.7 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2014-2023, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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define([], function () {
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function StateGeneratorProvider() {}
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function pointForTimestamp(timestamp, duration, name) {
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return {
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name: name,
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utc: Math.floor(timestamp / duration) * duration,
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value: Math.floor(timestamp / duration) % 2
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};
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}
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StateGeneratorProvider.prototype.supportsSubscribe = function (domainObject) {
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return domainObject.type === 'example.state-generator';
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};
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StateGeneratorProvider.prototype.subscribe = function (domainObject, callback) {
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var duration = domainObject.telemetry.duration * 1000;
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var interval = setInterval(function () {
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var now = Date.now();
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var datum = pointForTimestamp(now, duration, domainObject.name);
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datum.value = String(datum.value);
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callback(datum);
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}, duration);
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return function () {
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clearInterval(interval);
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};
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};
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StateGeneratorProvider.prototype.supportsRequest = function (domainObject, options) {
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return domainObject.type === 'example.state-generator';
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};
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StateGeneratorProvider.prototype.request = function (domainObject, options) {
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var start = options.start;
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var end = Math.min(Date.now(), options.end); // no future values
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var duration = domainObject.telemetry.duration * 1000;
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if (options.strategy === 'latest' || options.size === 1) {
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start = end;
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}
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var data = [];
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while (start <= end && data.length < 5000) {
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data.push(pointForTimestamp(start, duration, domainObject.name));
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start += duration;
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}
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return Promise.resolve(data);
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};
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return StateGeneratorProvider;
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});
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