/**

* Copyright 2012-2016, Plotly, Inc.

* All rights reserved.

*

* This source code is licensed under the MIT license found in the

* LICENSE file in the root directory of this source tree.

*/

'use strict';

var scales = require('./scales');

var defaultScale = require('./default_scale');

var isValidScaleArray = require('./is_valid_scale_array');

module.exports = function getScale(scl, dflt) {

if(!dflt) dflt = defaultScale;

if(!scl) return dflt;

function parseScale() {

try {

scl = scales[scl] || JSON.parse(scl);

}

catch(e) {

scl = dflt;

}

}

if(typeof scl === 'string') {

parseScale();

// occasionally scl is double-JSON encoded...

if(typeof scl === 'string') parseScale();

}

if(!isValidScaleArray(scl)) return dflt;

return scl;

};