<?php
/**
 * Shortcode_Carousel initially forked from Agnosia Bootstrap Carousel by AuSoft
 *
 * This class adds Carousell functionality to [gallery] shortcode and it loads only when needed.
 *
 * @since 1.1.0
 *
 * @package ItalyStrap
 */

namespace ItalyStrap\Shortcodes;

use ItalyStrap\Event\Subscriber_Interface;
use ItalyStrap\Carousel\Bootstrap;

/**
 * Add Bootstrap Carousel to gallery shortcode
 */
class Gallery implements Subscriber_Interface {

	/**
	 * Returns an array of hooks that this subscriber wants to register with
	 * the WordPress plugin API.
	 *
	 * @hooked plugins_loaded - 10
	 *
	 * @return array
	 */
	public static function get_subscribed_events() {

		return array(
			// 'hook_name'							=> 'method_name',
			'wp_loaded'	=> 'add_carousel_to_gallery_shortcode',
		);
	}

	/**
	 * Modify the gallery shortcode with Bootstrap Carousel functionality.
	 *
	 * @param  string        $output   The gallery output. Default empty.
	 * @param  array|string  $atts     Attributes of the gallery shortcode.
	 * @param  int           $instance Unique numeric ID of this gallery shortcode instance.
	 * @return string                  Return the new Bootstrap carousel
	 */
	public function gallery_shortcode( $output, $atts, $instance = null ) {

		/**
		 * In case the shortcode has no attributes $atts will be a string
		 */
		if ( ! is_array( $atts ) ) {
			return $output;
		}

		/**
		 * If type is not set return the output.
		 */
		if ( ! isset( $atts['type'] ) ) {
			return $output;
		}

		if ( 'carousel' === $atts['type'] ) {
			$carousel_bootstrap = new Bootstrap( $atts );
			return $carousel_bootstrap->__get( 'output' );
		}

		return $output;
	}

	/**
	 * Add 'Bootstrap Carousel' to $gallery_type array
	 *
	 * @param  array $gallery_types The array with gallery type.
	 * @return array                Return the new array
	 */
	public function gallery_types( $gallery_types ) {

		$gallery_types['carousel'] = __( 'Bootstrap Carousel', 'italystrap' );
		return $gallery_types;
	}



	/**
	 * Add type Carousel to built-in gallery shortcode
	 */
	public function add_carousel_to_gallery_shortcode() {

		/**
		 * Istantiate Shortcode_Carousel only if [gallery] shortcode exist
		 *
		 * @link http://wordpress.stackexchange.com/questions/103549/wp-deregister-register-and-enqueue-dequeue
		 */
		$post = get_post();
		$gallery = false;

		if ( isset( $post->post_content ) && has_shortcode( $post->post_content, 'gallery' ) ) {
			$gallery = true; // A http://dannyvankooten.com/3935/only-load-contact-form-7-scripts-when-needed/ .
		}

		if ( ! $gallery ) {
			// $shortcode_carousel = new Gallery();
			add_filter( 'post_gallery', array( $this, 'gallery_shortcode' ), 10, 3 );
			add_filter( 'jetpack_gallery_types', array( $this, 'gallery_types' ) );
			// add_filter( 'ItalyStrap_gallery_types', array( $this, 'gallery_types' ), 999 );
		}
	
	}
}