<?php
/**

 * Breadcrumbs Everywhere Notes & Knowns:
 *
 * - Trails to Level 5 Actions (i.e. Home > Members > Admin > Messages > Sent) are in commented code. 
 * - The current item is not linked by default. However, you are welcome to change that.
 * - The current item is not styled (bold, italics, etc.) by default. You can change that, too.
 *

**** HOW TO USE ****

	1. Add this function anywhere in your Buddypress template, typically in header.php:
	<?php if (function_exists('breadcrumbs_everywhere')) breadcrumbs_everywhere(); ?>
	That's it!

	2. Theme developers: You may adapt this plugin as needed. However, if you modify the core files your 
	changes will be overwritten by future plugin updates. Instead, copy the entire function here, paste it 
	into your theme's function.php file, and make your edits. Then, reference the function as in Step 1 above.  	
 *
 *
/******* JUST BE HAPPY IT WORKS *******/

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

// Begin...	if you customize copy everything below this line
//------------------------------------------------------------	  
function breadcrumbs_everywhere() { 

	global $bp; // we're outside the loop!
		
	// Assign some variables here	
		
	$page1 = $bp->members->root_slug; // bp_get_members_root_slug() // slug for the Members page. The BuddyPress default is 'members'. 
	$page2 = $bp->groups->root_slug; // bp_get_groups_root_slug() // slug for the Groups page. The BuddyPress default is 'groups'.	
	$page3 = $bp->activity->root_slug; // bp_get_activity_root_slug() // slug for the Activity page. The BuddyPress default is 'activity'.	
	$page4 = $bp->forums->root_slug; // bp_get_forums_root_slug() // slug for the Forums page. The BuddyPress default is 'forums'.
	$page5 = $bp->achievements->root_slug; // slug for the Achievements page. The BuddyPress default is 'achievements'.
	$divider_sub = '&gt;'; // other nice ones to try: &raquo; &gt;
	$homeurl = get_bloginfo('url'); // alt = get_option('home') or home_url();
	
	// Get the text for the Home link. Matches $setting_one in crumbs-admin.php
	$home = get_option( 'crumbs-setting-one');
	if ('' == $home && option_value!= null) { 
					$home = "Home" ; // if this is not set in Plugin Settings then default				
					}				
					
	// Get the text for the Blog link. Matches $setting_two in crumbs-admin.php 				
	$blog = get_option( 'crumbs-setting-two');				
	if ('' == $blog && option_value!= null) { 				
					$blog = "Blog" ; // if this is not set in Plugin Settings then default		 				
					}						
		
	// Get the entity for the divider. Matches $setting_three in crumbs-admin.php 				
	$divider = get_option( 'crumbs-setting-three');				
	if ('' == $divider && option_value!= null) { 				
					$divider = "&raquo;" ; // if this is not set in Plugin Settings then default		 				
					}
							
	// Since 1.2
	// Set starting links for posts on home vs static home page		
	$startpages = "<a href='" . $homeurl . "'>$home</a>"  . ""; // all pages
	$front = get_option('show_on_front'); 
	if ($front == "page" ) { // page on home					
		$startchain = "<a href='" . $homeurl . "'>$home</a>" . " $divider " . '<a href="' . get_permalink(get_option('page_for_posts')) . '">' . $blog . '</a>' ."";		
	} else { // posts on home			
		$startchain = "<a href='" . $homeurl . "'>$home</a>" . ""; 
	}
			
		
/** 
 /** ----------> First, some crumbs for Buddypress	
 */	
 				
		// Show on Buddypress Home page. If you want breadcrumbs on your Home page, uncomment this section.		
		//if ( bp_is_front_page() ) : 
		//echo "<a href='" . $homeurl . "'>$home</a>"  . "";		
		//endif;
				
		// Show breadcrumbs on all profile components
			
			//** For Level 4 
			// v1.4 added ucwords() for title case 
			// v1.3 changed bp_has_profile() to bp_is_user() 
			// v1.2 added !bp_is_register_page()
		
		if ( bp_is_user() && !bp_is_register_page() ) : 		
		echo $startpages . " $divider " . '<a href="' . $homeurl . '/' . $page1 . '/">' . ucwords($page1) . '</a>' . " $divider " . '<a href="' . $bp->displayed_user->domain . '">' . ucwords($bp->displayed_user->fullname)  . '</a>' . " $divider " . ucwords($bp->current_component)  . "";		
		endif;
		
			//** For Level 5. If you want Action breadcrumbs, uncomment and use this section instead. 
		//if ( bp_is_user() && !bp_is_register_page() ) : 		
		//echo $startpages . " $divider " . '<a href="' . $homeurl . '/' . $page1 . '/">' . ucwords($page1) . '</a>' . " $divider " . '<a href="' . $bp->displayed_user->domain . '">' . ucwords($bp->displayed_user->fullname)  . '</a>' . " $divider " . ucwords($bp->current_component) . " $divider_sub " . ucwords($bp->current_action) . "";				
		//endif;
		
				 	
		/** - Show on all pages to catch top-level add-ons
			* Explanation from @boone: http://wordpress.stackexchange.com/a/45438					
					* Since BP 1.5, BuddyPress uses WP Pages to display content 
					* To exclude BP content: is_page() && !bp_is_blog_page()
					* Show on BP content except on user pages: is_page() && !bp_is_user() 												
			* - Since 1.3
			*   - changed bp_has_profile() to bp_is_user()
			*   - added !bp_is_register_page()
			* - Since 1.2 
			*   - added is_page() 
		*/						
		if ( !bp_is_blog_page() && ( is_page() || is_page($page1) || is_page($page2) || is_page($page3) || is_page($page4) || is_page($page5) ) && !bp_is_user() && !bp_is_single_item() && !bp_is_register_page() ) :
		echo $startpages . " $divider " .  get_the_title()  . "";		
		endif;
		
		
		// Since 1.2
		// Show on Register page 						
		if ( bp_is_register_page() ) :
		echo $startpages . " $divider " .  get_the_title()  . "";	
		endif;

		
		// Show on Blog page
		// Since 1.2, but don't show if Blog is Home Page
		if ( bp_is_blog_page() && is_home() && $front == "page" ) :
		echo "<a href='" . $homeurl . "'>$home</a>" . " $divider " . $blog ."";
		endif;
		
				
		// Since 1.1
		// is it paged AND a Buddypress blog?
    	if ( get_query_var('paged') ) {
     	if ( bp_is_blog_page() && !(is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author()) ) echo ' (Page' . ' ' . get_query_var('paged') . ')';
					}
	
				
		// Show on Group Directory & Sub Pages
		// * - There's always more than one way to do something. Here are some alts if you customize:
		// * - alt use bp_groups_directory_permalink() or bp_get_groups_slug()
		// * - alt use $bp->groups->current_group->slug or $bp->groups->current_group->name
		// * - alt use if ( bp_is_group() && bp_is_single_item() ) 
		// * - $bp->current_component is tricky, test well!			
		
		if ( !bp_is_blog_page() && ( is_page($page1) || is_page($page2) || is_page($page3) || is_page($page4) || is_page($page5) ) && bp_is_single_item() ) :		
			
			//get Level 5 Group actions, break the array
			$groupaction = $bp->action_variables;
			foreach ($groupaction as $groupactions) {
			}		
			
			// Since 1.1
			// Add BP Group Hierarchy compatibility  --------------------------
			
			//get group parents
			$the_post_id = $bp->groups->current_group->id;
			$groupname = $bp->groups->current_group->name;
			$myparent = $bp->groups->current_group->parent_id;

				// Let's set up a function to convert the WP url 
				function ucwords_custom($str, $separator){
      				$str = str_replace($separator, " ", $str); 
      				$str = ucwords(strtolower($str)); // change to sentence case
      				return $str;
					}
					
			// parse the URL to get the group hierarchy
			$url = $_SERVER['REQUEST_URI'];
			$parsed_url = parse_url($url);
			$folder = explode('/',$parsed_url['path']);
			$lastaction = $bp->current_action; // what's the current BP action?
			$end = basename($parsed_url['path']); // what's the last folder?
			$domain = $homeurl;
			$crumbs = array_filter($folder);
			$sep = " $divider ";
			$result = array(); 
			$chain = '';
			$count = count($crumbs);
			$endofchain = ( strtolower($end) !== strtolower($lastaction) ) &&  null == strtolower($groupactions);
			foreach($crumbs as $key => $crumb){
     				$chain .= '/' . $crumb;
     				$subfolder = ucwords_custom($crumb, "-");
     			if($key != $count){
         			$result[] = "<a href='$chain'>$subfolder</a>";
				} elseif ($endofchain) {
					$result[] = "<a href='$chain'>$subfolder</a>";						
     			} else {
         			$result[] = $subfolder; 
     			}
			}
							
				if ( $endofchain ) { // then we're at the last group in the chain
				/* Explanation: 					
					* need to add the default BP action "Home" to the end of the chain
					* but NOT if Home has been clicked in the sub-nav 
					* and NOT on Level 5 actions since they're part of the chain						
					*/	
				
					echo $startpages . " $divider " . implode($sep , $result) . " $divider " . $lastaction;	
							
				
				} else { // then we're somewhere else in the chain or this is a base BP install
					
					//** For Level 5 
					echo $startpages . " $divider " . implode($sep , $result) ;	
					
					// From 1.0
					//** For Level 4 
					//echo $startpages . " $divider " . '<a href="' . $homeurl . '/' . $bp->current_component . '/">' . $bp->current_component . '</a>' .  " $divider " . '<a href="' . bp_get_groups_directory_permalink() . $bp->current_item . '/">' . $bp->groups->current_group->name . '</a>'  . " $divider " . ucwords_custom($bp->current_action, "-")  ."";			

				} 
						
			endif;
			// -----------------------------------------			
		
		
/** 
 /** ----------> Second, some crumbs for Wordpress	
 */			

		// Show on Wordpress

 		if (!(function_exists('bp_is_blog_page') && !bp_is_blog_page()) ) { // this line excludes content from buddypress pages 
		
		global $post;     // we're outside the loop!
		
	
		// Show on Wordpress Home page. If you want breadcrumbs on your Home page, uncomment this section.
		
		//if ( is_front_page() ) : 
		//echo "<a href='" . $homeurl . "'>$home</a>"  . "";		
		//endif;
		
		
			
		// Show on Blog posts	
		if ( is_single() && !is_attachment() ) :
			if ( get_post_type() != 'post' ) {
			echo $startchain . " $divider " .  get_the_title() . "";	
			} else {	
			$cat = get_the_category(); 
			$cat = $cat[0];
			echo $startchain . " $divider " . get_category_parents($cat, true, " $divider " ) .  get_the_title() . ""; // shows post title, edit as needed
			}		
		endif;
				
		
		
		// Since 1.1
		// Show on attachments
		if ( is_attachment() && !is_page() ) { // for posts
			$parent = get_post($post->post_parent);
			$cat = get_the_category($parent->ID); 
			$cat = $cat[0];
			$parent_link = get_permalink($parent);
			$parent_title = $parent->post_title;
			echo $startchain . " $divider " . get_category_parents($cat, true, " $divider " ) .  '<a href="' . $parent_link . '">' . $parent_title. '</a>'  . " $divider " .  get_the_title() . "";	
		} elseif ( is_attachment() && is_page() ){ // for pages
				$ancestors = array_reverse(get_post_ancestors($post)); // reverse the display order
				echo $startpages . " $divider ";
					foreach($ancestors as $id) {
                		echo "<a href='" . get_permalink($id) . "' title='" . get_the_title($id) . "'>" . get_the_title($id) . "</a>" . " $divider ";
					}			
				echo  get_the_title();	
		}
		
			
		
		// begin conditionals
		
		// v1.1 added !is_attachment()		
		if ( !is_home() && !is_front_page() && !is_attachment() || is_paged() ) { 
		
			// Show on Pages

			if ( is_page() && $post->post_parent ) {
   		 		// This is a subpage
				$parent_id = get_post($id);
				$parent_title = get_the_title($parent_id->post_parent);
			 	echo $startpages . " $divider " . '<a href="' . get_permalink(get_page_by_title($parent_title)) . '">' . $parent_title . '</a>' . " $divider "  .  get_the_title() . "";

				} elseif ( is_page() ) {
   	 			// This is not a subpage
	 			echo $startpages . " $divider " . get_the_title() . "";
			}
	

			// Show on Archive pages for Categories and Tags
						
			function crumb_get_category_parents( $id, $link = false, $divider = ' ' ) {
			// This function is modified from wp-includes\category-template.php
					$chain = ' ';
					$parent = &get_category( $id );
					if ( is_wp_error( $parent ) )

						return $parent;
						
					//if ( $nicename )
						//$name = $parent->slug;
					//else
						$name = $parent->name;
											
					//if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
					//$visited[] = $parent->parent;
					//$chain .= get_category_parents( $parent->parent, $link, $separator, $nicename, $visited );
					
					if ( $parent->parent && ($parent->parent != $parent->term_id) ) {
						$chain .= get_category_parents($parent->parent, true, $divider);
					}

					if ( $link )
						//$chain .= '<a href="' . get_category_link( $parent->term_id ) . '" title="' . esc_attr( sprintf( __( "View all posts in %s" ), $parent->name ) ) . '">'.$name.'</a>' . $separator;
						$chain .= $name . " ";
					else
						$chain .= $name.$divider;
					return $chain;
					
				}
					if ( is_category() || is_tag() ) {
						// attempt to get the category ancestors
						$cat = get_query_var('cat');
						$termcat = get_term($cat,'category');
						$parent = &get_category( $id );
						$parent_name = get_category_link( $parent->term_id );
					if($termcat->parent == 0) {
							// This category is a parent
							echo $startchain . " $divider " . single_cat_title( $prefix, $display ) . "";  
					} else {
							// This is a sub-category and it does have a parent						
							echo $startchain . " $divider " . crumb_get_category_parents($cat, true, " $divider ")  . ""; 
						}
					unset($termcat);
 					 		
 
    			} elseif ( is_day() ) {
     			echo $startchain . " $divider " . "<a href='" . get_year_link(get_the_time('Y')) . "'>" . get_the_time('Y') . "</a>" . " $divider " . "";
      			echo $startchain . " $divider " . "<a href='" . get_month_link(get_the_time('Y'),get_the_time('m')) . "'>" . get_the_time('F') . "</a>" . " $divider " . "";
      			echo get_the_time('d');
 
    			} elseif ( is_month() ) {
      			echo $startchain . " $divider " . "<a href='" . get_year_link(get_the_time('Y')) . "'>" . get_the_time('Y') . "</a>" . " $divider " . "";
      			echo get_the_time('F');
 
    			} elseif ( is_year() ) {
     	 		echo $startchain . " $divider " . get_the_time('Y');

	    		} else {      
    		} 
			
			
				// Since 1.1
				// is it paged?
    			if ( get_query_var('paged') ) {
     				if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) 
					echo ' (Page' . ' ' . get_query_var('paged') . ')';
					}
 
 
  		} // end conditionals
  
	} // end bp_is_blog_page

} // end breadcrumbs_everywhere() 
?>