44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
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/* eslint-disable no-unused-vars */
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/**
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* The Theme class helps manage the card themes.
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* Usually it overrides or enhances aspects of the card.js.
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*
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* @class Theme
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*/
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export default class Theme {
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/**
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* Loads a config file and parses it to JSON.
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*
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* @static
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* @param {string} [path=null] - Optional: A path where the config file is located at (including the filename and extension).
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* @returns {Promise} - Returns a promise, that returns the parsed json file when resolved.
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* @memberof Theme
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*/
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static loadConfig(path = null) {
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return new Promise((resolve, reject) => {
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path = path ? path : './config.json'
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let xhttp = new XMLHttpRequest()
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xhttp.onreadystatechange = function() {
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if (this.readyState == 4) {
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if (this.status == 200 || Theme._isLocal()) {
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try {
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const json = JSON.parse(this.responseText)
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resolve(json)
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} catch (e) {
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reject(e)
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}
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} else reject('Invalid request : ' + this.status)
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}
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}
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xhttp.open('GET', path, true)
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xhttp.send()
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})
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}
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static _isLocal() {
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return window.location.protocol == 'file:'
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}
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}
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