<?php
/*
Plugin Name: Simple Breadcrumb Navigation
Plugin URI: http://www.kriesi.at/archives/wordpress-plugin-simple-breadcrumb-navigation
Description: A simple and very lightweight breadcrumb navigation that covers nested pages and categories
Version: 1
Author: Christian "Kriesi" Budschedl
Author URI: http://www.kriesi.at/
*/

/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

class Simple_Breadcrumb {
    
    var $options;
    
    /**
     * PHP5 constructor.
     */
    public function __construct() {
        $this->options = array(//change this array if you want another output scheme
            'before' => '<span class="breadarrow"> ',
            'after' => ' </span>',
            'delimiter' => ( is_rtl() ) ? '&larr;' : '&rarr;'
        );
        $markup = $this->options['before'] . $this->options['delimiter'] . $this->options['after'];
        global $post;
        echo '<p class="breadcrumbs"><a href="' . home_url() . '">';
        //bloginfo('name');
        esc_html_e('Home', 'udesign');
        echo "</a>";
        if (!is_front_page()) {
            echo $markup;
        }
        $output = $this->simple_breadcrumb_case($post);
        echo "<span class='current_crumb'>";
        if (is_page() || is_single()) {
            the_title();
        } else {
            echo $output;
        }
        echo " </span></p>";
    }
    /**
     * PHP4 construction (backward compatibility).
     */
    public function Simple_Breadcrumb() {
        // This will NOT invoked, unless a sub-class that extends `Simple_Breadcrumb` calls it. In that case, call the new-style constructor to keep compatibility.
        self::__construct();
    }
    
    function simple_breadcrumb_case($der_post) {
        global $post;
        $markup = $this->options['before'].$this->options['delimiter'].$this->options['after'];
        if ( is_page() ) {
            if($der_post->post_parent) {
                $my_query = get_post($der_post->post_parent);			 
                $this->simple_breadcrumb_case($my_query);
                $link = '<a href="';
                $link .= get_permalink($my_query->ID);
                $link .= '">';
                $link .= ''. get_the_title($my_query->ID) . '</a>'. $markup;
                echo $link;
            }
            return;			 	
        } elseif ( is_single() ) {
            $category = get_the_category();
            if (is_attachment()){
                $my_query = get_post($der_post->post_parent);			 
                $category = get_the_category($my_query->ID);
                if( $category != null ) {
                    $ID = $category[0]->cat_ID;
                    echo get_category_parents($ID, true, $markup, false );
                }
                previous_post_link("%link $markup");

            } elseif ( get_post_type( $post ) == 'post' ) {
                $ID = $category[0]->cat_ID;
                get_category_parents_for_breadcrumbs( $ID, true, $markup, false );

            } else { // custom types
                //echo ucwords( get_post_type( $post ) ) . $markup;
            }
            return;
        } elseif ( is_category() ) {
            $category = get_the_category(); 
            $i = $category[0]->cat_ID;
            $parent = $category[0]-> category_parent;

            if($parent > 0 && $category[0]->cat_name == single_cat_title("", false)){
                echo get_category_parents($parent, true, $markup, false);
            }
            return single_cat_title('',false);
        } elseif ( is_tax() ) { // taxonomy
            $term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
            echo $term->name;
        } elseif ( is_author() ) {
            $curauth = (get_query_var('author_name')) ? get_user_by('slug', get_query_var('author_name')) : get_userdata(get_query_var('author'));
            return esc_html__('Author: ', 'udesign').$curauth->nickname;
        } elseif ( is_tag() ) {
            return esc_html__('Tag: ', 'udesign').single_tag_title('',false);
        } elseif ( is_404() ) {
            return esc_html__('404 - Page not Found', 'udesign');
        } elseif ( is_search() ) {
            return esc_html__('Search', 'udesign');
        } elseif ( is_year() ){
            return get_the_time('Y');
        } elseif ( is_month() ){
            $k_year = get_the_time('Y');
            echo "<a href='".get_year_link($k_year)."'>".$k_year."</a>".$markup;
            return get_the_time('F');
        } elseif ( is_day() || is_time() ){
            $k_year = get_the_time('Y');
            $k_month = get_the_time('m');
            $k_month_display = get_the_time('F');
            echo "<a href='".get_year_link($k_year)."'>".$k_year."</a>".$markup;
            echo "<a href='".get_month_link($k_year, $k_month)."'>".$k_month_display."</a>".$markup;
            return get_the_time('jS (l)'); 
        }
    }
}