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