<?php
if ( ! function_exists( "imedica_breadcrumb" ) ) {

	function imedica_breadcrumb() {
		/* Set up the arguments for the breadcrumb. */
		$opts = get_option( "rdfa_options" );
		$args = array(
			'prefix'                 => $opts['prefix'],
			'suffix'                 => $opts['suffix'],
			'title'                  => $opts['title'], //__( ' ', 'imedica' ),
			'home_title'             => $opts['home_title'], //__( 'Home', 'imedica' ),
			'separator'              => $opts['separator'],
			'front_page'             => false,
			'show_blog'              => false,
			'singular_post_taxonomy' => 'category',
			'echo'                   => true
		);
		if ( is_front_page() && ! $args['front_page'] ) {
			return apply_filters( 'rdfa_breadcrumb', false );
		}
		/* Format the title. */
		$title     = ( ! empty( $args['title'] ) ? '<span class="breadcrumbs-title">' . $args['title'] . '</span>' : '' );
		$separator = ( ! empty( $args['separator'] ) ) ? "<span class='separator'>{$args['separator']}</span>" : "<span class='separator'>/</span>";
		/* Get the items. */
		$items       = rdfa_breadcrumb_get_items( $args );
		$breadcrumbs = '<!-- RDFa Breadcrumbs start -->';
		$breadcrumbs .= '<div class="breadcrumbs"><div xmlns:v="http://rdf.data-vocabulary.org/#">';
		$breadcrumbs .= $args['prefix'];
		$breadcrumbs .= $title;
		$breadcrumbs .= join( " {$separator} ", $items );
		$breadcrumbs .= $args['suffix'];
		$breadcrumbs .= '</div></div>';
		$breadcrumbs .= '<!-- RDFa breadcrumbs end -->';
		$breadcrumbs = apply_filters( 'rdfa_breadcrumb', $breadcrumbs );
		if ( ! $args['echo'] ) {
			return $breadcrumbs;
		} else {
			echo $breadcrumbs;
		}
	}

}

/**
 * Gets the items for the RDFa Breadcrumb.
 *
 * @since 0.4
 */
if ( ! function_exists( 'rdfa_breadcrumb_get_items' ) ) {
	
	function rdfa_breadcrumb_get_items( $args ) {
		global $wp_query;
		$item          = array();
		$show_on_front = get_option( 'show_on_front' );
		/* Front page. */
		if ( is_front_page() ) {
			$item['last'] = $args['home_title'];
		}
		/* Link to front page. */
		if ( ! is_front_page() ) {
			$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . home_url( '/' ) . '" class="fa fa-home"><span class="hidden_title">Home</span></a></span>';
		}
		/* If bbPress is installed and we're on a bbPress page. */
		if ( function_exists( 'is_bbpress' ) && is_bbpress() ) {
			$item = array_merge( $item, rdfa_breadcrumb_get_bbpress_items() );
		} /* If viewing a home/post page. */
		elseif ( is_home() ) {
			$home_page    = get_page( $wp_query->get_queried_object_id() );
			$item         = array_merge( $item, rdfa_breadcrumb_get_parents( $home_page->post_parent ) );
			$item['last'] = get_the_title( $home_page->ID );
		} /* If viewing a singular post. */
		elseif ( is_singular() ) {
			$post             = $wp_query->get_queried_object();
			$post_id          = (int) $wp_query->get_queried_object_id();
			$post_type        = $post->post_type;
			$post_type_object = get_post_type_object( $post_type );
			if ( 'post' === $wp_query->post->post_type && $args['show_blog'] ) {
				$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_permalink( get_option( 'page_for_posts' ) ) . '">' . get_the_title( get_option( 'page_for_posts' ) ) . '</a></span>';
			}
			if ( 'page' !== $wp_query->post->post_type ) {
				/* If there's an archive page, add it. */
				if ( function_exists( 'get_post_type_archive_link' ) && ! empty( $post_type_object->has_archive ) ) {
					$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_post_type_archive_link( $post_type ) . '" title="' . esc_attr( $post_type_object->labels->name ) . '">' . $post_type_object->labels->name . '</a></span>';
				}
				if ( isset( $args["singular_{$wp_query->post->post_type}_taxonomy"] ) && is_taxonomy_hierarchical( $args["singular_{$wp_query->post->post_type}_taxonomy"] ) ) {
					$terms = wp_get_object_terms( $post_id, $args["singular_{$wp_query->post->post_type}_taxonomy"] );
					$item  = array_merge( $item, rdfa_breadcrumb_get_term_parents( $terms[0], $args["singular_{$wp_query->post->post_type}_taxonomy"] ) );
				} elseif ( isset( $args["singular_{$wp_query->post->post_type}_taxonomy"] ) ) {
					$item[] = get_the_term_list( $post_id, $args["singular_{$wp_query->post->post_type}_taxonomy"], '', ', ', '' );
				}
			}
			if ( ( is_post_type_hierarchical( $wp_query->post->post_type ) || 'attachment' === $wp_query->post->post_type ) && $parents = rdfa_breadcrumb_get_parents( $wp_query->post->post_parent ) ) {
				$item = array_merge( $item, $parents );
			}
			$item['last'] = get_the_title();
		} /* If viewing any type of archive. */
		else if ( is_archive() ) {
			if ( is_category() || is_tag() || is_tax() ) {
				$term     = $wp_query->get_queried_object();
				$taxonomy = get_taxonomy( $term->taxonomy );
				if ( ( is_taxonomy_hierarchical( $term->taxonomy ) && $term->parent ) && $parents = rdfa_breadcrumb_get_term_parents( $term->parent, $term->taxonomy ) ) {
					$item = array_merge( $item, $parents );
				}
				$item['last'] = $term->name;
			} else if ( function_exists( 'is_post_type_archive' ) && is_post_type_archive() ) {
				$post_type_object = get_post_type_object( get_query_var( 'post_type' ) );
				$item['last']     = $post_type_object->labels->name;
			} else if ( is_date() ) {
				if ( is_day() ) {
					$item['last'] = __( 'Archives for ', 'imedica' ) . get_the_time( 'F j, Y' );
				} elseif ( is_month() ) {
					$item['last'] = __( 'Archives for ', 'imedica' ) . single_month_title( ' ', false );
				} elseif ( is_year() ) {
					$item['last'] = __( 'Archives for ', 'imedica' ) . get_the_time( 'Y' );
				}
			} else if ( is_author() ) {
				$item['last'] = __( 'Archives by: ', 'imedica' ) . get_the_author_meta( 'display_name', $wp_query->post->post_author );
			}
		} /* If viewing search results. */
		else if ( is_search() ) {
			$item['last'] = __( 'Search Results for - ', 'imedica' ) . stripslashes( strip_tags( get_search_query() ) ) . '"';
		} /* If viewing a 404 error page. */
		else if ( is_404() ) {
			$item['last'] = __( 'Page Not Found', 'imedica' );
		}

		return apply_filters( 'rdfa_breadcrumb_items', $item );
	}

}

/**
 * Gets the items for the breadcrumb item if bbPress is installed.
 *
 * @since 0.4
 *
 * @param array $args Mixed arguments for the menu.
 *
 * @return array List of items to be shown in the item.
 */
if ( ! function_exists( 'rdfa_breadcrumb_get_bbpress_items' ) ) {

	function rdfa_breadcrumb_get_bbpress_items( $args = array() ) {
		$item             = array();
		$post_type_object = get_post_type_object( bbp_get_forum_post_type() );
		if ( ! empty( $post_type_object->has_archive ) && ! bbp_is_forum_archive() ) {
			$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_post_type_archive_link( bbp_get_forum_post_type() ) . '">' . bbp_get_forum_archive_title() . '</a></span>';
		}
		if ( bbp_is_forum_archive() ) {
			$item[] = bbp_get_forum_archive_title();
		} elseif ( bbp_is_topic_archive() ) {
			$item[] = bbp_get_topic_archive_title();
		} elseif ( bbp_is_single_view() ) {
			$item[] = bbp_get_view_title();
		} elseif ( bbp_is_single_topic() ) {
			$topic_id = get_queried_object_id();
			$item     = array_merge( $item, rdfa_breadcrumb_get_parents( bbp_get_topic_forum_id( $topic_id ) ) );
			if ( bbp_is_topic_split() || bbp_is_topic_merge() || bbp_is_topic_edit() ) {
				$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . bbp_get_topic_permalink( $topic_id ) . '">' . bbp_get_topic_title( $topic_id ) . '</a></span>';
			} else {
				$item[] = bbp_get_topic_title( $topic_id );
			}
			if ( bbp_is_topic_split() ) {
				$item[] = __( 'Split', 'imedica' );
			} elseif ( bbp_is_topic_merge() ) {
				$item[] = __( 'Merge', 'imedica' );
			} elseif ( bbp_is_topic_edit() ) {
				$item[] = __( 'Edit', 'imedica' );
			}
		} elseif ( bbp_is_single_reply() ) {
			$reply_id = get_queried_object_id();
			$item     = array_merge( $item, rdfa_breadcrumb_get_parents( bbp_get_reply_topic_id( $reply_id ) ) );
			if ( ! bbp_is_reply_edit() ) {
				$item[] = bbp_get_reply_title( $reply_id );
			} else {
				$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . bbp_get_reply_url( $reply_id ) . '">' . bbp_get_reply_title( $reply_id ) . '</a></span>';
				$item[] = __( 'Edit', 'imedica' );
			}
		} elseif ( bbp_is_single_forum() ) {
			$forum_id        = get_queried_object_id();
			$forum_parent_id = bbp_get_forum_parent( $forum_id );
			if ( 0 !== $forum_parent_id ) {
				$item = array_merge( $item, rdfa_breadcrumb_get_parents( $forum_parent_id ) );
			}
			$item[] = bbp_get_forum_title( $forum_id );
		} elseif ( bbp_is_single_user() || bbp_is_single_user_edit() ) {
			if ( bbp_is_single_user_edit() ) {
				$item[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . bbp_get_user_profile_url() . '">' . bbp_get_displayed_user_field( 'display_name' ) . '</a></span>';
				$item[] = __( 'Edit', 'imedica' );
			} else {
				$item[] = bbp_get_displayed_user_field( 'display_name' );
			}
		}

		return apply_filters( 'rdfa_breadcrumb_get_bbpress_items', $item, $args );
	}

}


/**
 * Gets parent pages of any post type.
 *
 * @since 0.1
 *
 * @param int $post_id ID of the post whose parents we want.
 * @param string $separator .
 *
 * @return string $html String of parent page links.
 */
if ( ! function_exists( 'rdfa_breadcrumb_get_parents' ) ) {

	function rdfa_breadcrumb_get_parents( $post_id = '', $separator = '/' ) {
		$parents = array();
		if ( $post_id == 0 ) {
			return $parents;
		}
		while ( $post_id ) {
			$page      = get_page( $post_id );
			$parents[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_permalink( $post_id ) . '" title="' . esc_attr( get_the_title( $post_id ) ) . '">' . get_the_title( $post_id ) . '</a></span>';
			$post_id   = $page->post_parent;
		}
		if ( $parents ) {
			$parents = array_reverse( $parents );
		}

		return $parents;
	}

}


/**
 * Searches for term parents of hierarchical taxonomies.
 *
 * @since 0.1
 *
 * @param int $parent_id The ID of the first parent.
 * @param object|string $taxonomy The taxonomy of the term whose parents we want.
 *
 * @return string $html String of links to parent terms.
 */
if ( ! function_exists( 'rdfa_breadcrumb_get_term_parents' ) ) {

	function rdfa_breadcrumb_get_term_parents( $parent_id = '', $taxonomy = '', $separator = '/' ) {
		$html    = array();
		$parents = array();
		if ( empty( $parent_id ) || empty( $taxonomy ) ) {
			return $parents;
		}
		while ( $parent_id ) {
			$parent    = get_term( $parent_id, $taxonomy );
			$parents[] = '<span typeof="v:Breadcrumb"><a rel="v:url" property="v:title" href="' . get_term_link( $parent, $taxonomy ) . '" title="' . esc_attr( $parent->name ) . '">' . $parent->name . '</a></span>';
			$parent_id = $parent->parent;
		}
		if ( $parents ) {
			$parents = array_reverse( $parents );
		}

		return $parents;
	}

}