Ok, so I didn’t get a reply, but I worked this out as as solution and I hope it will be useful to others.
I am using the evolve template, so when you see evolve it is referring to something in the evolve template; e.g. evolve_breadcrumb() is a function used by the evolve template.
This is the scenario:
- Custom post type: boat
- Types of boat: motor, sail
- Languages: english, spanish
This has to select the correct menu for post or boat / motor or sail / english or spanish.
First step: select evolve_breadcrumb() for a standard post OR use new function for a custom single page single_boat_evolve_breadcrumb().
Some of the fields in the code refer to custom fields… e.g. $typeofboat refers to Motor or Sail boat.
/**
* Start breadcrumbs
*/
// selects standard breadcrumb function or specific for single boat page
// standard returns to blog / boat returns to single page parent
function choose_and_display_breadcrumbs() {
if(is_single() && is_singular("boat")) {
single_boat_evolve_breadcrumb();
} else {
evolve_breadcrumb();
}
}
// get a page ID by page slug
function get_ID_by_page_slug($page_slug) {
$page = get_page_by_path($page_slug);
if ($page) {
return $page->ID;
} else {
return null;
}
}
/**
* for single page which is a boat
*/
function single_boat_evolve_breadcrumb() {
global $data,$post;
echo '<ul class="breadcrumbs">';
echo '<li><a class="home" href="';
echo home_url();
echo '">'.__('Home', 'evolve');
echo "</a></li>";
$params['link_none'] = '';
$separator="";
if(is_single() && is_singular("boat")) {
$parentID = 0;
$parentpagelink = "";
$availability = strtolower( get_custom_field('availability'));
$typeofboat = strtolower( get_custom_field('type_of_boat'));
$currentlanguage = pll_current_language();
if ( $currentlanguage == 'en') {
if ($availability == 'sold') {
$parentID = get_ID_by_page_slug('boats-sold');
$parentpagelink = get_page_link( $parentID);
} else {
switch ($typeofboat) {
case 'yacht':
$parentID = get_ID_by_page_slug('sail-brokerage');
$parentpagelink = get_page_link( $parentID);
break;
case 'motorboat':
$parentID = get_ID_by_page_slug('motor-brokerage');
$parentpagelink = get_page_link( $parentID);
break;
default:
break;
}
}
} elseif ($currentlanguage == 'es') {
if ($availability == 'sold') {
$parentID = get_ID_by_page_slug('barcos-vendidos');
$parentpagelink = get_page_link( $parentID);
} else {
switch ($typeofboat) {
case 'yacht':
$parentID = get_ID_by_page_slug('corretaje-de-vela-2');
$parentpagelink = get_page_link( $parentID);
break;
case 'motorboat':
$parentID = get_ID_by_page_slug('corretaje-de-motor');
$parentpagelink = get_page_link( $parentID);
break;
default:
break;
}
}
}
}
echo '<li>';
echo '<a href="' . $parentpagelink . '" title="' . $typeofboat . '">' . get_the_title($parentID) . '</a>';
echo '</li>';
echo '<li>'. get_the_title() .'</li>';
echo "</ul>";
}