terriajs/lib/Core/readJson.js

Geospatial data visualization platform.

"use strict";

/*global require*/
var json5 = require('json5');
var readText = require('./readText');

var when = require('terriajs-cesium/Source/ThirdParty/when');

/**
 * Try to read the file as JSON. If that fails, try JSON5.
 * @param  {File} file The file.
 * @return {Object} The JSON or json5 object described by the file.
 */
function readJson(file) {
    return when(readText(file), function(result) {
        try {
            return JSON.parse(result);
        } catch (e) {
            if (e instanceof SyntaxError) {
                return json5.parse(result);
            } else {
                throw e;
            }
        }
    }, function(e) {
        throw e;
    });
}

module.exports = readJson;