Multiplayer plugin code injection

multiplayer_inject.js

// Code injected into the Entity class
ig.Entity.inject({

    // Abstracting the controls
    controls: {
        up: false,
        down: false,
        left: false,
        right: false
    },

    setControl: function(id) {
        this.controls[id] = true;
        this.publishAction(id);
    },

    unsetControl: function(id) {
        this.controls[id] = false;
        this.publishAction(id);
    },

    // Publishes a Entity's action
    publishAction: function(id) {

        ig.game.pubsub.publish(ig.game.topics.ACTION,
        {
            remoteName:this.remoteName,
            action: id,
            result: this.controls[id],
            pos: this.pos
        });

    }

});

// Actions can be triggered in the Entity classes using the following
if(ig.input.pressed(this.inputs.left)) {
    this.setControl('left');
}

// They can then be checked using
if(this.controls.left) {
    // Move left
}