/**
* Gets terms in the sermon date order. Result is cached for a max. of a day.
*
* @since 0.1.1
*
* @param bool $flush_cache Whether to get fresh results (flush cache)
*
* @return mixed Array of terms on success
*/
protected function get_terms_in_sermon_date_order($flush_cache = false)
{
$this->flush_cache = $this->flush_cache || $flush_cache;
$terms = get_transient($this->id . '_in_sermon_date_order');
if (!$terms || $this->flush_cache) {
$sermons = $this->sermons->get_many(array('posts_per_page' => 1000, 'cache_results' => false));
$taxonomy = $this->taxonomy();
$terms = array();
if ($sermons->have_posts()) {
foreach ($sermons->posts as $post) {
$year = get_the_date('Y', $post);
if ($post_terms = get_the_terms($post, $taxonomy)) {
foreach ($post_terms as $term) {
if (!isset($terms[$term->term_id])) {
$term->year = $year;
$terms[$term->term_id] = $term;
}
}
}
}
}
set_transient($this->id . '_in_sermon_date_order', $terms, DAY_IN_SECONDS);
}
return $terms;
}
