fixate/pw-mvc-boilerplate

<?php

class EmbedderException extends Exception
{
}

abstract class Embedder
{
    public static function factory($url)
    {
        $embedder = null;
        if (YoutubeEmbedder::matches($url)) {
            $embedder = new YoutubeEmbedder();
        }

        $embedder->parse($url);

        return $embedder;
    }

    public $url = null;

    abstract public function parse($url);

    abstract public function code($options = null);
}

class YoutubeEmbedder extends Embedder
{
    // YouTube
    const MATCH_RGX = '#^(https?:)?//(www\.)?youtube\.com#';

    public $vid = false;

    public static function matches($url)
    {
        return preg_match(self::MATCH_RGX, $url);
    }

    public function parse($url)
    {
        $this->url = $url;
        $components = parse_url($url);
        if (!$components) {
            throw new EmbedderException('Malformed embeddable URL.');
        }

        $match = null;
        if ($query = $components['query']) {
            parse_str($query, $query);
            if (array_key_exists('v', $query)) {
                $this->vid = $query['v'];

                return true;
            }
        } elseif (preg_match('#^/embed/(.+)$#', $components['path'], $match)) {
            $this->vid = $match[1];

            return true;
        }

        throw new EmbedderException("Invalid YouTube url {$url}.");
    }

    public function code($options = array())
    {
        $allowfullscreen = $options['allowfullscreen'] ? 'allowfullscreen' : '';

        $embed = "//youtube.com/embed/{$this->vid}";

        return '<iframe width="'.$options['width'].'" height="'.$options['height'].
            '" src="'.$embed.'" frameborder="0" '.$allowfullscreen.'></iframe>';
    }
}