backbone-command.js

(function(root, factory) {

    // Start with AMD.
    if (typeof define === 'function' && define.amd) {
        define(['underscore', 'backbone'], function(_, Backbone) {
        factory( _, Backbone);
    });

    // Next for Node.js or CommonJS.
    } else if (typeof exports !== 'undefined' && typeof require === 'function') {
        var _ = require('underscore'),
            Backbone = require('backbone');
        factory(_, Backbone);

    // Finally, as a browser global.
    } else {
        factory(root._, root.Backbone);
    }
}(this, function factory(_, Backbone) {
    Backbone.Command = function (options) {
        this._configure(options || {});
    };

    _.extend(Backbone.Command.prototype, {

        injector: 'inject',

        _configure: function(options) {
            if(options.injector !== undefined) {
                options.injector.injectInto(this);
            }
        },

        execute:function () {

        }
    });

    //Like all Backbone classes, make use of the same extend method
    Backbone.Command.extend = Backbone.Router.extend;
    //Yaiks! Our only way into the router is the _bindRoutes. Unfortunately there is no _configure method such as we have within a View
    var _bindRoutes = Backbone.Router.prototype._bindRoutes;

    Backbone.CommandRouter = Backbone.Router.extend({

        injector: null,

        //We abuse this as our constructor. We want to initialize the injector. The initialize method could be used for this,
        //but this allows users to easily overwrite the method and breaking this class.
        _bindRoutes: function() {
            this.injector = new injector.Injector();

            _bindRoutes();
        },

        bindCommand: function(listenObject, event, command) {
            listenObject.on(event, this._executeCommand, {command:command, options:{injector:this.injector}});
        },

        _executeCommand: function(){
            var theCommand = new this.command(this.options);
            theCommand.execute.apply(theCommand, arguments);
            theCommand = null;
        }
    });
}));