openmct/example/generator/StateGeneratorProvider.js
Pete Richards 865b99f445 Handle string states (#2019)
* State generator realtime uses strings

Change the state generator's realtime data to return string values
instead of number values.  This exercises an edge case where
enumerations could be a string instead of a number.  Exposes #2018.

* [Telemetry] handle string enumeration value

Don't treat all strings as properly formatted enumeration values.

Instead, check any input value against known enumerations and if
one matches, return it.  Otherwise, return input.

Fixes #2018
2018-05-02 11:42:42 -07:00

83 lines
2.8 KiB
JavaScript

/*****************************************************************************
* Open MCT, Copyright (c) 2014-2017, 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.
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*
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* under the License.
*
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define([
], function (
) {
function StateGeneratorProvider() {
}
function pointForTimestamp(timestamp, duration, name) {
return {
name: name,
utc: Math.floor(timestamp / duration) * duration,
value: Math.floor(timestamp / duration) % 2
};
}
StateGeneratorProvider.prototype.supportsSubscribe = function (domainObject) {
return domainObject.type === 'example.state-generator';
};
StateGeneratorProvider.prototype.subscribe = function (domainObject, callback) {
var duration = domainObject.telemetry.duration * 1000;
var interval = setInterval(function () {
var now = Date.now();
var datum = pointForTimestamp(now, duration, domainObject.name);
datum.value += "";
callback(datum);
}, duration);
return function () {
clearInterval(interval);
};
};
StateGeneratorProvider.prototype.supportsRequest = function (domainObject, options) {
return domainObject.type === 'example.state-generator';
};
StateGeneratorProvider.prototype.request = function (domainObject, options) {
var start = options.start;
var end = options.end;
var duration = domainObject.telemetry.duration * 1000;
if (options.strategy === 'latest' || options.size === 1) {
start = end;
}
var data = [];
while (start <= end && data.length < 5000) {
data.push(pointForTimestamp(start, duration, domainObject.name));
start += 5000;
}
return Promise.resolve(data);
};
return StateGeneratorProvider;
});