phaser4-rex-plugins/plugins/utils/object/GetAdvancedValue.js

Plugins of phaser4

/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */

import MATH from '../../math/const.js';
import GetValue from './GetValue.js';

/**
 * Retrieves a value from an object. Allows for more advanced selection options, including:
 *
 * Allowed types:
 * 
 * Implicit
 * {
 *     x: 4
 * }
 *
 * From function
 * {
 *     x: function ()
 * }
 *
 * Randomly pick one element from the array
 * {
 *     x: [a, b, c, d, e, f]
 * }
 *
 * Random integer between min and max:
 * {
 *     x: { randInt: [min, max] }
 * }
 *
 * Random float between min and max:
 * {
 *     x: { randFloat: [min, max] }
 * }
 * 
 *
 * @function Phaser.Utils.Objects.GetAdvancedValue
 * @since 3.0.0
 *
 * @param {object} source - The object to retrieve the value from.
 * @param {string} key - The name of the property to retrieve from the object. If a property is nested, the names of its preceding properties should be separated by a dot (`.`) - `banner.hideBanner` would return the value of the `hideBanner` property from the object stored in the `banner` property of the `source` object.
 * @param {*} defaultValue - The value to return if the `key` isn't found in the `source` object.
 *
 * @return {*} The value of the requested key.
 */
var GetAdvancedValue = function (source, key, defaultValue) {
    var value = GetValue(source, key, null);

    if (value === null) {
        return defaultValue;
    }
    else if (Array.isArray(value)) {
        return MATH.RND.pick(value);
    }
    else if (typeof value === 'object') {
        if (value.hasOwnProperty('randInt')) {
            return MATH.RND.integerInRange(value.randInt[0], value.randInt[1]);
        }
        else if (value.hasOwnProperty('randFloat')) {
            return MATH.RND.realInRange(value.randFloat[0], value.randFloat[1]);
        }
    }
    else if (typeof value === 'function') {
        return value(key);
    }

    return value;
};

export default GetAdvancedValue;