<?php
/**
 * This file contains functions related modifying Bizznis Breadcrumb output
 *
 * @since 1.0.0
 *
 * By default, the Bizznis Breadcrumb class does not handle Shop pages and taxonomy
 * archives in the same way as WooCommerce's breadcrumbs. These filters and callback
 * functions modify the default Bizznis breadcrumb output so that the breadcrumb
 * trail mimics that of WooCommerce's breadcrumbs, for:
 * - Shop page (archive page)
 * - Single product
 * - Taxonomy archive
 *
 * Users who prefer to use WooCommerce's breadcrumbs can do so by adding this to their child
 * theme's functions.php:
 * - add_theme_support( 'bizznis-woo-breadcrumbs' );
 * And this to the relevant templates:
 * - remove_action( 'bizznis_loop', 'bizznis_do_breadcrumbs' );
 *
 * @see readme.txt for more details
 *
 * As this modification code uses existing Bizznis Breadcrumb filters there is a risk that
 * it will cause compatibility issues with any existing uses of Bizznis Breadcrumb filters.
 * If this is the case, adjusting the filter callback priority in existing filter calls
 * should ensure that each filter callback is called in the correct order.
 *
 * @see bizznis/lib/functions/breadcrumb.php
 * @see woocommerce/templates/shop/breadcrumb.php
 */

/**
 * Filter the Bizznis Breadcrumbs archive crumb
 *
 * Needed for Product Archive (Shop page) and Taxonomy archives
 *
 * Note: relevant WooCommerce settings (WooCommerce > Settings > Pages tab):
 * - woocommerce_prepend_shop_page_to_urls (breadcrumbs and permalinks)
 * - woocommerce_prepend_shop_page_to_products (permalinks only)
 * - woocommerce_prepend_category_to_products (permalinks only)
 *
 * @since 1.0.0
 */
add_filter( 'bizznis_archive_crumb', 'bizznis_wc_get_archive_crumb_filter', 10, 2 );
function bizznis_wc_get_archive_crumb_filter( $crumb, $args ) {
	# Are we on the product archive page?
	if ( is_post_type_archive( 'product') && get_option( 'page_on_front' ) !== woocommerce_get_page_id( 'shop' ) ) {
		$shop_id = woocommerce_get_page_id( 'shop' );
		$shop_name = $shop_id ? get_the_title( $shop_id ) : ucwords( get_option('woocommerce_shop_slug') );
		if ( is_search() ) {
			$crumb = bizznis_wc_get_crumb_link( get_post_type_archive_link( 'product' ), $shop_name, $shop_name, $args['sep'] . __( 'Search results for &ldquo;', 'bizznis' ) . get_search_query() . '&rdquo;' );
		}
		else {
			$crumb = $shop_name;
		}
		return apply_filters( 'bizznis_wc_product_archive_crumb', $crumb, $args );
	}
	# Are we on a shop taxonomy archive page?
	if ( is_tax( 'product_cat' ) || is_tax( 'product_tag' ) ) {
		$crumb = '';
		$prepend = '';
		# Should we prepend crumb with 'shop' page link?
		# See Dashboard > WooC Settings > Pages tab
		$shop_url = get_option( 'woocommerce_prepend_shop_page_to_urls' );
		$shop_id = woocommerce_get_page_id( 'shop' );
		$shop_title = get_the_title( $shop_id );
		if ( 'yes' == $shop_url && $shop_id && get_option( 'page_on_front' ) !== $shop_id ) {
			$prepend = bizznis_wc_get_crumb_link( get_permalink( $shop_id ), $shop_title, $shop_title, $args['sep'] );
		}
	}
	if ( is_tax( 'product_cat' ) ) {
		$term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
		$parents = array();
		$parent = $term->parent;
		while ( $parent ) {
			$parents[] = $parent;
			$new_parent = get_term_by( 'id', $parent, get_query_var( 'taxonomy' ) );
			$parent = $new_parent->parent;
		}
		$crumb .= $prepend;
		if ( ! empty( $parents ) ) {
			$parents = array_reverse( $parents );
			foreach ( $parents as $parent ) {
				$item = get_term_by( 'id', $parent, get_query_var( 'taxonomy' ) );
				$crumb .= bizznis_wc_get_crumb_link( get_term_link( $item->slug, 'product_cat' ), $item->name, $item->name, $args['sep'] );
			}
		}
		$crumb .= single_term_title( '', false );
		return $crumb;
	}
	if ( is_tax( 'product_tag' ) ) {
		$crumb .= $prepend . __( 'Products tagged &ldquo;', 'bizznis' ) . single_term_title( '', false ) . _x( '&rdquo;', 'endquote', 'bizznis' );
		return $crumb;
	}
	# Original unmodified
	return $crumb;
}

/**
 * Filter the Bizznis Breadcrumbs singular crumb
 *
 * Needed for single Product pages
 *
 * @since 1.0.0
 */
add_filter( 'bizznis_single_crumb', 'bizznis_wc_get_single_crumb', 10, 2 );
function bizznis_wc_get_single_crumb( $crumb, $args ) {
	# Are we on a single product page?
	if ( is_singular( 'product' ) ) {
		$crumb = '';
		$prepend = '';
		# Should we prepend crumb with 'shop' page link?
		# See Dashboard > WooC Settings > Pages tab
		$shop_url = get_option( 'woocommerce_prepend_shop_page_to_urls' );
		$shop_id = woocommerce_get_page_id( 'shop' );
		$shop_title = get_the_title( $shop_id );
		if ( 'yes' == $shop_url && $shop_id && get_option( 'page_on_front' ) !== $shop_id ) {
			$prepend = bizznis_wc_get_crumb_link( get_permalink( $shop_id ), $shop_title, $shop_title, $args['sep'] );
		}
		$crumb .= $prepend;
		if ( $terms = wp_get_object_terms( get_the_ID(), 'product_cat' ) ) {
			$term = current( $terms );
			$parents = array();
			$parent = $term->parent;
			while ( $parent ) {
				$parents[] = $parent;
				$new_parent = get_term_by( 'id', $parent, 'product_cat' );
				$parent = $new_parent->parent;
			}
			if( ! empty( $parents ) ) {
				$parents = array_reverse( $parents );
				foreach ( $parents as $parent ) {
					$item = get_term_by( 'id', $parent, 'product_cat' );
					$crumb .= bizznis_wc_get_crumb_link( get_term_link( $item->slug, 'product_cat' ), $item->name, $item->name, $args['sep'] );
				}
			}
			$crumb .= bizznis_wc_get_crumb_link( get_term_link( $term->slug, 'product_cat' ), $term->name, $term->name, $args['sep'] );
		}
		$crumb .= get_the_title();
		return apply_filters( 'bizznis_wc_single_product_crumb', $crumb, $args );
	}
	# Fallback - original unmodified
	return $crumb;
}


/**
 * Helper function to create anchor link for a single crumb.
 *
 * This is a copy of Bizznis_Breadcrumb::get_breadcrumb_link() (G1.8)
 *
 * @since 1.0.0
 */
function bizznis_wc_get_crumb_link( $url, $title, $content, $sep = false ) {
	$link = sprintf( '<a href="%s" title="%s">%s</a>', esc_attr( $url ), esc_attr( $title ), esc_html( $content ) );
	if ( $sep ) {
		$link .= $sep;
	}
	return $link;
}