<?php

if (!defined('CORE_VERSION'))
	die();


// Returns a trail of categories as an array
//
function core_breadcrumbs_category_trail($category) {
	$trail = array();

	$link = get_category_link($category->cat_ID);
	$trail[$link] = $category->name;

	// Recurse into parents
	while ($category->parent) {
		$category = get_category($category->parent);
		$link = get_category_link($category->cat_ID);
		$trail[$link] = $category->name;
	}

	return array_reverse($trail);
}

// Returns a trail of posts as an array
//
function core_breadcrumbs_post_trail($post) {
	$trail = array();

	$link = get_permalink($post->ID);
	$trail[$link] = get_the_title($post->ID);

	// Recurse into parents
	while ($post->post_parent) {
		$post = get_page($post->post_parent);
		$link = get_permalink($post->ID);
		$trail[$link] = get_the_title($post->ID);
	}

	return array_reverse($trail);
}

// Returns a trail of archive dates as array
//
function core_breadcrumbs_date_trail($year=false, $month=false, $day=false) {
	$trail = array();

	if ($year) {
		$year = get_the_time('Y');
		$link = get_year_link($year);
		$trail[$link] = get_the_time('Y');
	}

	if ($month) {
		$month = get_the_time('m');
		$link = get_month_link($year, $month);
		$trail[$link] = get_the_time('F');
	}

	if ($day) {
		$day = get_the_time('d');
		$link = get_day_link($year, $month, $day);
		$trail[$link] = get_the_time('l');
	}

	return $trail;
}

// Outputs breadcrumb links for the current page
//
function core_breadcrumbs($separator='&raquo;', $prefix='You are here: ', $home_title='Home') {
	/* === OPTIONS === */
    $text['home']     = $home_title ; // text for the 'Home' link
    $text['category'] = '%s'; // text for a category page
    $text['search']   = '%s Query'; // text for a search results page
    $text['tag']      = '%s'; // text for a tag page
    $text['author']   = '%s'; // text for an author page
    $text['404']      = 'Error 404'; // text for the 404 page

    $showCurrent = 1; // 1 - show current post/page title in breadcrumbs, 0 - don't show
    $showOnHome  = 0; // 1 - show breadcrumbs on the homepage, 0 - don't show
    $delimiter   = $separator; // delimiter between crumbs
    $before      = '<span class="current">'; // tag before the current crumb
    $after       = '</span>'; // tag after the current crumb
    /* === END OF OPTIONS === */

    global $post;
    $homeLink = home_url('/');
    $linkBefore = '<span typeof="v:Breadcrumb">';
    $linkAfter = '</span>';
    $linkAttr = ' rel="v:url" property="v:title"';
    $link = $linkBefore . '<a' . $linkAttr . ' href="%1$s">%2$s</a>' . $linkAfter;

    if (is_home() || is_front_page()) {

        if ($showOnHome == 1) echo $prefix . '<a href="' . $homeLink . '">' . $text['home'] . '</a>';

    } else {

        echo '<div xmlns:v="http://rdf.data-vocabulary.org/#"> ' . $prefix . sprintf($link, $homeLink, $text['home']) . $delimiter;

        if ( is_category() ) {
            $thisCat = get_category(get_query_var('cat'), false);
            if ($thisCat->parent != 0) {
                $cats = get_category_parents($thisCat->parent, TRUE, $delimiter);
                $cats = str_replace('<a', $linkBefore . '<a' . $linkAttr, $cats);
                $cats = str_replace('</a>', '</a>' . $linkAfter, $cats);
                echo $cats;
            }
            echo $before . sprintf($text['category'], single_cat_title('', false)) . $after;

        } elseif ( is_search() ) {
            echo $before . sprintf($text['search'], get_search_query()) . $after;

        } elseif ( is_day() ) {
            echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y')) . $delimiter;
            echo sprintf($link, get_month_link(get_the_time('Y'),get_the_time('m')), get_the_time('F')) . $delimiter;
            echo $before . get_the_time('d') . $after;

        } elseif ( is_month() ) {
            echo sprintf($link, get_year_link(get_the_time('Y')), get_the_time('Y')) . $delimiter;
            echo $before . get_the_time('F') . $after;

        } elseif ( is_year() ) {
            echo $before . get_the_time('Y') . $after;

        } elseif ( is_single() && !is_attachment() ) {
            if ( get_post_type() != 'post' ) {
                $post_type = get_post_type_object(get_post_type());
                $slug = $post_type->rewrite;
                printf($link, $homeLink . '/' . $slug['slug'] . '/', $post_type->labels->singular_name);
                if ($showCurrent == 1) echo $delimiter . $before . get_the_title() . $after;
            } else {
                $cat = get_the_category(); $cat = $cat[0];
                $cats = get_category_parents($cat, TRUE, $delimiter);
                if ($showCurrent == 0) $cats = preg_replace("#^(.+)$delimiter$#", "$1", $cats);
                $cats = str_replace('<a', $linkBefore . '<a' . $linkAttr, $cats);
                $cats = str_replace('</a>', '</a>' . $linkAfter, $cats);
                echo $cats;
                if ($showCurrent == 1) echo $before . get_the_title() . $after;
            }

        } elseif ( !is_single() && !is_page() && get_post_type() != 'post' && !is_404() ) {
            $post_type = get_post_type_object(get_post_type());
            echo $before . $post_type->labels->singular_name . $after;

        } elseif ( is_attachment() ) {
            $parent = get_post($post->post_parent);
            $cat = get_the_category($parent->ID); $cat = $cat[0];
            $cats = get_category_parents($cat, TRUE, $delimiter);
            $cats = str_replace('<a', $linkBefore . '<a' . $linkAttr, $cats);
            $cats = str_replace('</a>', '</a>' . $linkAfter, $cats);
            echo $cats;
            printf($link, get_permalink($parent), $parent->post_title);
            if ($showCurrent == 1) echo $delimiter . $before . get_the_title() . $after;

        } elseif ( is_page() && !$post->post_parent ) {
            if ($showCurrent == 1) echo $before . get_the_title() . $after;

        } elseif ( is_page() && $post->post_parent ) {
            $parent_id  = $post->post_parent;
            $breadcrumbs = array();
            while ($parent_id) {
                $page = get_page($parent_id);
                $breadcrumbs[] = sprintf($link, get_permalink($page->ID), get_the_title($page->ID));
                $parent_id  = $page->post_parent;
            }
            $breadcrumbs = array_reverse($breadcrumbs);
            for ($i = 0; $i < count($breadcrumbs); $i++) {
                echo $breadcrumbs[$i];
                if ($i != count($breadcrumbs)-1) echo $delimiter;
            }
            if ($showCurrent == 1) echo $delimiter . $before . get_the_title() . $after;

        } elseif ( is_tag() ) {
            echo $before . sprintf($text['tag'], single_tag_title('', false)) . $after;

        } elseif ( is_author() ) {
            global $author;
            $userdata = get_userdata($author);
            echo $before . sprintf($text['author'], $userdata->display_name) . $after;

        } elseif ( is_404() ) {
            echo $before . $text['404'] . $after;
        }

        if ( get_query_var('paged') ) {
            if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ' (';
            echo __('Page', THEME_SLUG) . ' ' . get_query_var('paged');
            if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) echo ')';
        }

        echo '</div>';

    }
}

?>