You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

163 lines
4.4 KiB
PHTML

2 years ago
<?php
class PageTemplater
{
/**
* A reference to an instance of this class.
*/
private static $instance;
/**
* The array of templates that this plugin tracks.
*/
protected $templates;
/**
* Returns an instance of this class.
*/
public static function get_instance()
{
if (null == self::$instance) {
self::$instance = new PageTemplater();
}
return self::$instance;
}
/**
* Initializes the plugin by setting filters and administration functions.
*/
private function __construct()
{
$this->templates = array();
// Add a filter to the attributes metabox to inject template into the cache.
if (version_compare(floatval(get_bloginfo('version')), '4.7', '<')) {
// 4.6 and older
add_filter(
'single_template',
array( $this, 'register_project_templates' )
);
} else {
// Add a filter to the wp 4.7 version attributes metabox
add_filter(
'theme_page_templates',
array( $this, 'add_new_template' )
);
}
// Add a filter to the save post to inject out template into the page cache
add_filter(
'wp_insert_post_data',
array( $this, 'register_project_templates' )
);
// Add a filter to the template include to determine if the page has our
// template assigned and return it's path
add_filter(
'template_include',
array( $this, 'view_project_template')
);
// Add your templates to this array.
$this->templates = array(
'broadcast-template.php' => 'Broadcast',
);
}
/**
* Adds our template to the page dropdown for v4.7+
*
*/
public function add_new_template($posts_templates)
{
$posts_templates = array_merge($posts_templates, $this->templates);
return $posts_templates;
}
/**
* Adds our template to the pages cache in order to trick WordPress
* into thinking the template file exists where it doens't really exist.
*/
public function register_project_templates($atts)
{
// Create the key used for the themes cache
$cache_key = 'page_templates-' . md5(get_theme_root() . '/' . get_stylesheet());
// Retrieve the cache list.
// If it doesn't exist, or it's empty prepare an array
$templates = wp_get_theme()->get_page_templates();
if (empty($templates)) {
$templates = array();
}
// New cache, therefore remove the old one
wp_cache_delete($cache_key, 'themes');
// Now add our template to the list of templates by merging our templates
// with the existing templates array from the cache.
$templates = array_merge($templates, $this->templates);
// Add the modified cache to allow WordPress to pick it up for listing
// available templates
wp_cache_add($cache_key, $templates, 'themes', 1800);
return $atts;
}
/**
* Checks if the template is assigned to the page
*/
public function view_project_template($template)
{
// Return the search template if we're searching (instead of the template for the first result)
if (is_search()) {
return $template;
}
// Get global post
global $post;
// Return template if post is empty
if (! $post) {
return $template;
}
// Return default template if we don't have a custom one defined
if (! isset($this->templates[get_post_meta(
$post->ID,
'_wp_page_template',
true
)])) {
return $template;
}
// Allows filtering of file path
$filepath = apply_filters('page_templater_plugin_dir_path', plugin_dir_path(__FILE__));
$file = $filepath . get_post_meta(
$post->ID,
'_wp_page_template',
true
);
// Just to be safe, we check if the file exist first
if (file_exists($file)) {
return $file;
} else {
echo $file;
}
// Return template
return $template;
}
}
add_action('plugins_loaded', array( 'PageTemplater', 'get_instance' ));