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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.
*****************************************************************************/
/*jslint es5: true */
define(
[
"./MSLDataDictionary",
"module"
],
function (MSLDataDictionary, module) {
"use strict";
var TERRESTRIAL_DATE = "terrestrial_date",
LOCAL_DATA = "../data/rems.json";
/**
* Fetches historical data from the REMS instrument on the Curiosity
* Rover.
* @memberOf example/msl
* @param $q
* @param $http
* @param REMS_WS_URL The location of the REMS telemetry data.
* @constructor
*/
function RemsTelemetryServerAdapter($http, $log, REMS_WS_URL) {
this.localDataURI = module.uri.substring(0, module.uri.lastIndexOf('/') + 1) + LOCAL_DATA;
this.REMS_WS_URL = REMS_WS_URL;
this.$http = $http;
this.$log = $log;
this.promise = undefined;
this.dataTransforms = {
//Convert from pascals to millibars
'pressure': function pascalsToMillibars(pascals) {
return pascals / 100;
}
};
}
/**
* The data dictionary for this data source.
* @type {MSLDataDictionary}
*/
RemsTelemetryServerAdapter.prototype.dictionary = MSLDataDictionary;
/**
* Fetches historical data from source, and associates it with the
* given request ID.
* @private
*/
RemsTelemetryServerAdapter.prototype.requestHistory = function (request) {
var self = this,
id = request.key;
var dataTransforms = this.dataTransforms;
function processResponse(response) {
var data = [];
/*
* History data is organised by Sol. Iterate over sols...
*/
response.data.soles.forEach(function (solData) {
/*
* Check that valid data exists
*/
if (!isNaN(solData[id])) {
var dataTransform = dataTransforms[id];
/*
* Append each data point to the array of values
* for this data point property (min. temp, etc).
*/
data.unshift({
date: Date.parse(solData[TERRESTRIAL_DATE]),
value: dataTransform ? dataTransform(solData[id]) : solData[id]
});
}
});
return data;
}
function fallbackToLocal() {
self.$log.warn("Loading REMS data failed, probably due to"
+ " cross origin policy. Falling back to local data");
return self.$http.get(self.localDataURI);
}
//Filter results to match request parameters
function filterResults(results) {
return results.filter(function (result) {
return result.date >= (request.start || Number.MIN_VALUE)
&& result.date <= (request.end || Number.MAX_VALUE);
});
}
function packageAndResolve(results) {
return {
id: id,
values: results
};
}
return (this.promise = this.promise || this.$http.get(this.REMS_WS_URL))
.catch(fallbackToLocal)
.then(processResponse)
.then(filterResults)
.then(packageAndResolve);
};
/**
* Requests historical telemetry for the named data attribute. In
* the case of REMS, this data source exposes multiple different
* data variables from the REMS instrument, including temperature
* and others
* @param id The telemetry data point key to be queried.
* @returns {Promise | Array<RemsTelemetryValue>} that resolves with an Array of {@link RemsTelemetryValue} objects for the request data key.
*/
RemsTelemetryServerAdapter.prototype.history = function (request) {
return this.requestHistory(request);
};
return RemsTelemetryServerAdapter;
}
);
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