Create a gist now

Instantly share code, notes, and snippets.

What would you like to do?
<?php
/**
* Get a breadcrumb nav.
*
* @return string A breadcrumb nav.
*
* @since anchorage 1.0
*/
if( ! function_exists( 'anchorage_get_breadcrumbs' ) ) {
function anchorage_get_breadcrumbs() {
$out = '';
/**
* Determine what sort of page view this is.
* Based on that, we might grab parent posts, parent terms, or just a home link.
*/
// If we're viewing a term archive, denote that resource type.
if( anchorage_is_termish() ) {
$resource_type = 'taxonomy';
$object_type = get_queried_object() -> taxonomy;
$object_id = get_queried_object() -> term_id;
// Or, if we're viewing a single post or page, get more specific.
} elseif( anchorage_is_singlish() ) {
$object_id = get_the_ID();
$object_type = get_post_type();
$post_type_obj = get_post_type_object( $object_type );
// If it's a hierarchial post type, that's our resource type.
if( is_post_type_hierarchical( $object_type ) ) {
$resource_type = 'hierarchical_post_type';
// If it's a custom post type, that's our resource.
} elseif( anchorage_is_custom_post_type( $object_type ) ) {
$resource_type = 'flat_custom_post_type';
} else {
$resource_type = 'flat_post_type';
}
// Of if it's a post type archive, that's our resource.
} elseif( is_post_type_archive() ) {
$resource_type = 'post_type_archive';
$object_type = get_post_type();
$post_type_obj = get_post_type_object( $object_type );
}
// Start an array to hold the breadcrumbs, starting with a string to denote the homepage.
$crumb_array = array( 'home' );
// If it's a tax or nested post type, we can use the get_ancestors() function.
if( ( $resource_type == 'taxonomy' ) || ( $resource_type == 'hierarchical_post_type' ) ) {
$get_ancestors = get_ancestors( $object_id, $object_type );
// If it's a flat custom post type, we'll add a string to denote that.
} elseif( $resource_type == 'flat_custom_post_type' ) {
$crumb_array []= 'post_type_archive';
// And if it's a flat standard post type, again we can use get_ancestors(), but we'll do so with the first category.
} elseif( $resource_type == 'flat_post_type' ) {
$post_categories = get_the_category();
$first_category = $post_categories[0];
$get_ancestors = get_ancestors( $first_category -> term_id, 'category' );
// We also have to add that first category in at the end.
$get_ancestors []= $first_category -> term_id;
}
// If we did a call to get_ancestors(), we want to remove empty elements, reverse the order, and merge it in with the rest of the breadcrumbs.
if( isset( $get_ancestors ) ) {
$get_ancestors = array_filter( $get_ancestors );
$get_ancestors = array_reverse( $get_ancestors );
$crumb_array = array_merge( $crumb_array, $get_ancestors );
}
// Add a string to denote the current page.
$crumb_array []= 'current';
/**
* Let's see if the current view has child terms or child posts.
*/
$children = '';
// If we are browsing a term, look for child terms.
if( $resource_type == 'taxonomy' ) {
$get_children = get_term_children( $object_id, $object_type );
// If we find child terms, build them into an array.
if( is_array( $get_children ) ) {
foreach( $get_children as $c ) {
$child = array();
$term = get_term( $c, $object_type );
$title = $term -> name;
$href = get_term_link( $term -> term_id, $object_type );
$child []= $title;
$child []= $href;
$children []= $child;
}
}
// If we are browsing a post, look for child posts.
} elseif( $resource_type == 'hierarchical_post_type' ) {
$args = array(
'post_parent' => $object_id,
'post_type' => $object_type,
'posts_per_page' => get_option( 'posts_per_page' ),
'post_status' => 'publish'
);
$get_children = get_children( $args );
// If we found some child posts, build them into an array.
if( is_array( $get_children ) ) {
foreach( $get_children as $c ) {
$child = array();
$title = get_the_title( $c -> ID );
$href = get_permalink( $c -> ID );
$child []= $title;
$child []= $href;
$children []= $child;
}
}
}
// If we had some children, add that to the crumbs.
if( ! empty( $get_children ) ) {
$crumb_array []= 'children';
}
// We'll put an arrow between each breadcrumb.
$arrow = anchorage_get_arrow( 'right', array( 'breadcrumbs-arrow' ), false );
// Grab a count of the ancestors so we know when to stop adding arrows.
$count = count( $crumb_array );
// For each parent, output a breacrumb link, to include microformat.
$i = 0;
foreach ( $crumb_array as $crumb ) {
$crumb_link = '';
$crumb_title = '';
$this_crumb = '';
$i++;
// Provide a link to the home page.
if( $crumb == 'home' ) {
$crumb_title = esc_html__( 'Home', 'anchorage' );
$crumb_link = home_url();
// Provide the title of the current page, unlinked.
} elseif( $crumb == 'current' ) {
if( anchorage_is_singlish() ) {
$crumb_title = get_the_title();
} elseif( is_404() ) {
$crumb_title = esc_html__( '404', 'anchorage' );
} elseif( is_author() ) {
$crumb_title = get_the_author();
} elseif( is_search() ) {
$crumb_title = esc_html__( 'Search', 'anchorage' );
} elseif( $resource_type == 'post_type_archive' ) {
$crumb_title = $post_type_obj -> labels -> name;
} else {
$term = get_queried_object();
$crumb_title = wp_kses_post( $term -> name );
}
// If this is the crumb for child links, output each child, comma-seperated.
} elseif( $crumb == 'children' ) {
if( is_array( $children ) ) {
// Grab a comma.
$comma = esc_html__( ', ', 'anchorage' );
$child_count = count( $children );
$child_i = 0;
foreach( $children as $child ) {
$child_i++;
$crumb_title = $child[0];
$crumb_link = $child[1];
$this_crumb .= anchorage_get_breadcrumb( $crumb_title, $crumb_link );
// If we're not at the end, add a comma.
if( $child_count != $child_i ) {
$this_crumb .= $comma;
}
}
}
// If this breadcrumb is not for one of our special strings, dig into it and output the correct data.
} else {
// If it's a taxonomy resource or a flat post type resource, then the breadcrumbs are term links.
if( ( $resource_type == 'taxonomy' ) || ( $resource_type == 'flat_post_type' ) ) {
$obj = get_category( $crumb );
$crumb_title = $obj -> name;
$crumb_link = get_term_link( $obj -> term_id, 'category' );
// If it's a flat custom post type, just link back to the post type archive.
} elseif( $resource_type == 'flat_custom_post_type' ) {
$crumb_title = $post_type_obj -> labels -> name;
$crumb_link = get_post_type_archive_link( $object_type );
// For anything else, grab the title and permalink.
} else {
$crumb_title = get_the_title( $crumb );
$crumb_link = get_permalink( $crumb );
}
}
if( empty( $this_crumb ) ) {
$this_crumb = anchorage_get_breadcrumb( $crumb_title, $crumb_link );
}
$out .= $this_crumb;
// Unless we're at the end of the crumbs, add an arrow.
if( $i != $count ) {
$out .= $arrow;
}
}
if( empty ( $out ) ) { return false; }
$class = "breadcrumbs breadcrumbs-$resource_type";
$out .= anchorage_get_hard_rule();
// Wrap the breadcrumbs.
$out = "
<nav itemscope itemtype='http://data-vocabulary.org/Breadcrumb' rel='navigation' class='breadcrumbs breadcrumbs-$resource_type'>
$out
</nav>
";
return $out;
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment