$('[data-form-widget=collection]').each(function(){

    var $collection = $(this),
        prototypeString = $collection.data('prototype'),
        prototypeName = $collection.data('prototypeName') || '__name__',
        prototypeNameRegx = new RegExp(prototypeName+"(label__)?","g"),
        count = $collection.children().length;

    console.log(this, count, prototypeString);

    var $deleteLink = $("<span />", {
        'class': 'js-delete',
        'text': 'Delete'
    });

    var $addLink = $("<span />", {
        'class': 'js-add',
        'text': 'Add'
    });

    if($collection.data('collectionAllowDelete')) {

        $collection
            .children()
            .append($deleteLink.clone(true));

        $collection.on('click', '.js-delete', function(){
            event.preventDefault();
            $(this).parent().remove();
        });
    }

    if($collection.data('collectionAllowAdd')) {

        $addLink.click(function(event){
            event.preventDefault();
            var newPrototypeString = prototypeString.replace(prototypeNameRegx, count),
                $newPrototype = $(newPrototypeString).append($deleteLink.clone(true));
            $newPrototype.insertBefore($addLink);
            count++;
        });

        $collection.append($addLink);
    }
});