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<?php
abstract class Jetpack_Tiled_Gallery_Layout {
	// Template whitelist
	private static $templates = array( 'carousel-container', 'circle-layout', 'rectangular-layout', 'square-layout' );
	private static $partials  = array( 'carousel-image-args', 'item' );

	protected $type; // Defined in child classes
	public $attachments;
	public $link;
	public $grayscale;
	public $columns;
	public function __construct( $attachments, $link, $grayscale, $columns ) {

		$this->attachments           = $attachments;
		$this->link                  = $link;
		$this->needs_attachment_link = ! ( isset( $link ) && $link == 'file' );
		$this->grayscale             = $grayscale;
		$this->columns               = $columns;
	}

	public function HTML( $context = array() ) {
		// Render the carousel container template, which will take the
		// appropriate strategy to fill it
		ob_start();
		$this->template(
			'carousel-container',
			array_merge(
				$context,
				array(
					'attachments'           => $this->attachments,
					'link'                  => $this->link,
					'needs_attachment_link' => $this->needs_attachment_link,
					'grayscale'             => $this->grayscale,
				)
			)
		);
		$html = ob_get_clean();

		return $html;
	}

	private function template( $name, $context = null ) {
		if ( ! in_array( $name, self::$templates ) ) {
			return;
		}

		if ( isset( $context ) ) {
			extract( $context );
		}

		/**
		 * Filters the Tiled Gallery template path
		 *
		 * @module tiled-gallery
		 * @since 4.4.0
		 *
		 * @param string $path Template path.
		 * @param string $path Template name.
		 * @param array $context Context array passed to the template.
		 */
		require apply_filters( 'jetpack_tiled_gallery_template', dirname( __FILE__ ) . "/templates/$name.php", $name, $context );
	}

	private function partial( $name, $context = null ) {
		if ( ! in_array( $name, self::$partials ) ) {
			return;
		}

		if ( isset( $context ) ) {
			extract( $context );
		}

		/**
		 * Filters the Tiled Gallery partial path
		 *
		 * @module tiled-gallery
		 * @since 4.4.0
		 *
		 * @param string $path Partial path.
		 * @param string $path Partial name.
		 * @param array $context Context array passed to the partial.
		 */
		require apply_filters( 'jetpack_tiled_gallery_partial', dirname( __FILE__ ) . "/templates/partials/$name.php", $name, $context );
	}

	protected function get_container_extra_data() {
		global $post;

		$blog_id = (int) get_current_blog_id();

		if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
			$likes_blog_id = $blog_id;
		} else {
			$likes_blog_id = Jetpack_Options::get_option( 'id' );
		}

		if ( class_exists( 'Jetpack_Carousel' ) || in_array( 'carousel', Jetpack::get_active_modules() ) || 'carousel' == $this->link ) {
			$extra_data = array(
				'blog_id'       => $blog_id,
				'permalink'     => get_permalink( isset( $post->ID ) ? $post->ID : 0 ),
				'likes_blog_id' => $likes_blog_id,
			);
		} else {
			$extra_data = null;
		}

		return $extra_data;
	}
}