gistfile1.php

<?php

/** Abstract Repository Class **/
abstract class PostRepository {

    public function create(array $input)
    {
        $post = $this->_create($input);

        if ($post) {
            $post = $this->toJson($post);
            Event::fire('post.created', array($post));
        }

        return $post;
    }

    public function findById($id)
    {
        $post = $this->_findById($id);

        if ($post) {
            $post = $this->toJson($post);
            Event::fire('post.found', array($post));
        }

        return $post;
    }

    public function getLatest($limit)
    {
        $posts = $this->_getLatest($limit);

        if ($posts) {
            $posts = $this->toJson($posts);
            Event::fire('posts.latest', array($posts));
        }

        return $this->toJson($posts);
    }

    public function destroy($id)
    {
        if ($this->_destory($id)) {
            Event::fire('post.destroy', array($id));
            return true;
        }

        return false;
    }

    abstract protected function _create(array $input);

    abstract protected function _findById($id);

    abstract protected function _getLatest($limit);

    abstract protected function _destroy($id);

    abstract public function toJson($obj);
}

/** Eloquent Repository Implementation **/
class EloquentPostRepository extends PostRepository {

    protected function _create(array $input)
    {
        return Post::create($input);
    }

    protected function _findById($id)
    {
        return Post::find($id);
    }

    protected function _getLatest($limit)
    {
        return Post::orderBy('created_at')->take($limit)->get();
    }

    protected function _destroy($id)
    {
        return Post::find($id)->delete();
    }

    public function toJson($obj)
    {
        if (is_array($obj)) {

            $array = [];

            foreach ($obj as $model) {

                if ($model instanceof Eloquent) {
                    $array[] = $model->toJson();
                }
            }

            return $array;

        } elseif ($obj instanceof Eloquent) {

            return $obj->toJson();
        }

        return null;
    }
}