<?php
/**
 * Adds some functionality to theme galleries
 *
 * @since vantage 1.0
 *
 * @license GPL 2.0
 */
if ( !function_exists( 'vantage_gallery' ) ) {
	/**
	 * Display a flex slider powered gallery.
	 *
	 * @param $atts
	 *
	 * @return string
	 */
	function vantage_gallery( $contents, $attr ) {
		if ( empty( $attr['type'] ) || $attr['type'] != 'slider' ) {
			return $contents;
		}

		global $post;

		static $instance = 0;
		$instance++;

		// We're trusting author input, so let's at least make sure it looks like a valid orderby statement
		if ( isset( $attr['orderby'] ) ) {
			$attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );

			if ( !$attr['orderby'] ) {
				unset( $attr['orderby'] );
			}
		}

		/*
		 * @var $order
		 * @var $orderby
		 * @var $id
		 * @var $itemtag
		 * @var $icontag
		 * @var $captiontag
		 * @var $size
		 * @var $include
		 * @var $exclude
		 * @var $wp_default
		 * @var $target_blank
		 */
		extract( shortcode_atts( array(
			'order'      => 'ASC',
			'orderby'    => 'menu_order ID',
			'id'         => $post->ID,
			'itemtag'    => 'dl',
			'icontag'    => 'dt',
			'captiontag' => 'dd',
			'columns'    => 3,
			'size'       => 'large',
			'include'    => '',
			'exclude'    => '',
			'wp_default'    => false,
			'target_blank' => false,
		), $attr ) );

		// This gallery has requested to use the WordPress default gallery.
		if ( $wp_default ) {
			return $contents;
		}

		$id = intval( $id );

		if ( 'RAND' == $order ) {
			$orderby = 'none';
		}

		if ( ! empty( $include ) ) {
			$include = preg_replace( '/[^0-9,]+/', '', $include );
			$_attachments = get_posts( array( 'include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby ) );

			$attachments = array();

			foreach ( $_attachments as $key => $val ) {
				$attachments[ $val->ID ] = $_attachments[ $key ];
			}
		} elseif ( ! empty( $exclude ) ) {
			$exclude = preg_replace( '/[^0-9,]+/', '', $exclude );
			$attachments = get_children( array( 'post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby ) );
		} else {
			$attachments = get_children( array( 'post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby ) );
		}

		if ( empty( $attachments ) ) {
			return '';
		}

		// This is the custom stuff

		// Create the gallery content
		$return = '';
		$return .= '<div class="flexslider-wrapper">';
		$return .= '<div class="flexslider">';
		$return .= '<ul class="slides">';

		foreach ( $attachments as $attachment ) {
			$return .= '<li>';
			$return .= apply_filters( 'vantage_slide_before', '', $attachment );
			$return .= wp_get_attachment_image( $attachment->ID, $size, false, array( 'class' => 'slide-image' ) );

			if ( $attachment->post_excerpt ) {
				$return .= '<div class="flex-caption">' . $attachment->post_excerpt . '</div>';
			}
			$return .= apply_filters( 'vantage_slide_after', '', $attachment );
			$return .= '</li>';
		}
		$return .= '</ul>';
		$return .= '</div>';
		$return .= '</div>';

		return $return;
	}
}
add_filter( 'post_gallery', 'vantage_gallery', 10, 2 );

if ( ! function_exists( 'vantage_gallery_types' ) ) {
	/**
	 * Add our fancy slider gallery to the list of gallery types.
	 *
	 * @return mixed
	 *
	 * @since vantage 1.0
	 */
	function vantage_gallery_types( $types ) {
		$types['slider'] = __( 'Slider', 'vantage' );

		return $types;
	}
}
add_filter( 'siteorigin_gallery_types', 'vantage_gallery_types' );

if ( ! function_exists( 'vantage_gallery_default_type' ) ) {
	/**
	 * Set our fancy gallery to the default gallery type.
	 *
	 * @param $types
	 *
	 * @return mixed
	 *
	 * @since vantage 1.0
	 */
	function vantage_gallery_default_type() {
		return 'slider';
	}
}
add_filter( 'siteorigin_gallery_default_type', 'vantage_gallery_default_type' );