API one-click useroptions

var bshields = bshields || {};
bshields.Collision = (function() {
    'use strict';

    var version = 2.2,
        behaviors = {
            DONT_MOVE: 1,
            WARN_PLAYER: 2,
            STOP_AT_WALL: 4
        },
        config = {},
        configDefaults = {
            pathColor: '#ff00ff',
            layer: 'walls',
            behavior: behaviors.STOP_AT_WALL | behaviors.WARN_PLAYER
        };

    Object.defineProperties(config, {
        pathColor: {
            get: function() {
                var stPathColor = state.bshields.Collision.config.pathColor;

                if (/* stPathColor has an invalid value */) return configDefaults.pathColor;
                /* ensure stPathColor is in correct format */
                return stPathColor;
            }
        },
        layer: {
            get: function() {
                var stLayer = state.bshields.Collision.config.layer;

                if (/* stLayer has an invalid value */) return configDefaults.layer;
                return stLayer;
            }
        },
        behavior: {
            get: function() {
                var stBehavior = state.bshields.Collision.config.behavior;

                if (!stBehavior) return configDefaults.behavior;
                /* map string value stBehavior to integer return value */
            }
        }
    });

    // script contents
    // config.pathColor, config.layer, and config.behavior are referenced

    function checkInstall() {
        if (!state.bshields ||
            !state.bshields.Collision ||
            !state.bshields.Collision.version ||
             state.bshields.Collision.version !== version) {
            state.bshields = state.bshields || {};
            state.bshields.Collision = {
                version: version,
                gcUpdated: 0,
                config: {}
            };
        }
        checkGlobalConfig();
    }

    function checkGlobalConfig() {
        var gc = globalconfig && globalconfig.collisiondetection,
            st = state.bshields.Collision;

        if (gc && gc.lastsaved && gc.lastsaved > st.gcUpdated) {
            st.gcUpdated = gc.lastsaved;
            st.config.pathColor = gc['Path Color'];
            st.config.layer = gc.Layer;
            st.config.behavior = gc.Behavior;
        }
    }

    return {
        checkInstall: checkInstall,
        registerEventHandlers: registerEventHandlers
    };
}());

on('ready', function() {
    'use strict';

    bshields.Collision.checkInstall();
    bshields.Collision.registerEventHandlers();
});

   "useroptions": [
    {
        "name": "Path Color",
        "type": "text",
        "default": "#ff00ff",
        "description": ...
    },
    {
        "name": "Layer",
        "type": "select",
        "options": ["all", "walls", "gmlayer", "objects", "map"],
        "default": "walls",
        "description": ...
    },
    {
        "name": "Behavior",
        "type": "select",
        "options": ["Don't Move", "Warn Player", "Stop at Wall", "Don't Move & Warn Player", "Warn Player & Stop at Wall"],
        "default": "Warn Player & Stop at Wall",
        "description": ...
    }],