/
progo-page-templater.php
210 lines (160 loc) · 5.48 KB
/
progo-page-templater.php
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<?php
/*
Plugin Name: ProGo Page Templater
Plugin URI: http://www.ninthlink.com/
Description: Add custom page templates to any WordPress theme
Version: 1.0.1
Author: Ninthlink, Inc.
Author URI: http://www.ninthlink.com/
*/
class ProGoPageTemplater {
/**
* A Unique Identifier
*/
protected $plugin_slug;
/**
* 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::$instance = new ProGoPageTemplater();
}
return self::$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.
add_filter(
'page_attributes_dropdown_pages_args',
array( $this, 'register_project_templates' )
);
// 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')
);
// Get array of page templates
$templates = scandir( plugin_dir_path(__FILE__). 'templates/' );
if ( is_array( $templates ) ) :
foreach ( $templates as $template ) {
if ( $template == '.' || $template == '..' || strpos( $template, '.' ) ) continue;
$template_meta = get_file_data( plugin_dir_path(__FILE__). 'templates/' . $template . '/' . $template . '.php', array('name' => 'Template Name', 'description' => 'Description') );
$this->templates[ $template . '/' . $template . '.php' ] = ( isset( $template_meta['name'] ) ? $template_meta['name'] : 'ProGo Page Template' );
}
endif;
// Add action to register template functions.php
add_action(
'init', // <---- is this the right action? Appears to work...
array( $this, 'register_template_functions' )
);
// Admin Menu
add_action(
'admin_menu',
array( $this, 'progo_page_templater_menu' )
);
}
public function progo_page_templater_menu() {
add_options_page( 'ProGo Page Templater', 'ProGo Page Templater', 'manage_options', 'progo-page-templater', array( $this, 'progo_page_teplater_options' ) );
}
public function progo_page_teplater_options() {
if ( !current_user_can( 'manage_options' ) ) {
wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
}
print( '<ul class="wrap">' );
if ( is_array($this->templates) ) {
foreach ( $this->templates as $template => $name ) {
print( '<li>' . $name . '</li>' );
}
}
print( '</ul>' );
}
/**
* Adds our templates functions.php file to register sidebars, etc.
*
*/
public function register_template_functions() {
if ( is_admin() ) {
$post_id = false;
if ( isset( $_GET['post'] ) ) {
$post_id = $_GET['post'];
}
elseif( isset( $_POST['post'] ) ) {
$post_id = $_POST['post'];
}
if ( $post_id !== false ) { // If we are editing a page (or post)...
$template = get_post_meta($post_id,'_wp_page_template',TRUE); // get the page template...
if ( array_key_exists( $template, $this->templates ) ) { // and if the template is in our list plugin page templates...
$template_dir = plugin_dir_path( $template );
$template_function = plugin_dir_path(__FILE__) . 'templates/' . $template_dir . 'functions.php'; // build the file location for our functions.php file...
if ( file_exists( $template_function ) ) { // and if that file exists...
include_once ( $template_function ); // include it
}
}
}
}
else {
// Not Admin side...
}
}
/**
* 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 ) {
global $post;
if ( ! isset( $this->templates[ get_post_meta( $post->ID, '_wp_page_template', true ) ] ) ) {
return $template;
}
$file = plugin_dir_path(__FILE__). 'templates/' .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;
}
}
add_action( 'plugins_loaded', array( 'ProGoPageTemplater', 'get_instance' ) );
?>