first commit

2023-11-30 13:20:54 -05:00
commit e9e5c0546c
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+<?php
+/**
+ * Page Templates
+ *
+ * @package Canvas
+ */
+
+// If this file is called directly, abort.
+if ( ! defined( 'WPINC' ) ) {
+	die;
+}
+
+/**
+ * Module main class.
+ */
+class CNVS_Page_Templates {
+
+	/**
+	 * The array of templates that this plugin tracks.
+	 *
+	 * @var      array
+	 */
+	protected $templates;
+
+	/**
+	 * Initialize the class and set its properties.
+	 */
+	public function __construct() {
+
+		$this->templates = array();
+
+		add_filter( 'theme_page_templates', array( $this, 'add_new_template' ) );
+
+		// Add a filter to the page attributes metabox to inject our template into the page template cache.
+		add_filter( 'page_attributes_dropdown_pages_args', array( $this, 'register_project_templates' ) );
+
+		// Add a filter to the save post in order 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 in order 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(
+			'template-canvas-fullwidth.php' => esc_html__( 'Canvas Full Width', 'canvas' ),
+		);
+	}
+
+	/**
+	 * Adds our template to the page dropdown
+	 *
+	 * @param array $posts_templates The posts templates.
+	 */
+	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.
+	 *
+	 * @param array $atts The attributes for the page attributes dropdown.
+	 */
+	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_cache_get( $cache_key, 'themes' );
+
+		if ( empty( $templates ) ) {
+			$templates = array();
+		}
+
+		// Since we've updated the cache, we need to delete the old cache.
+		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
+	 *
+	 * @param string $template The name of template.
+	 */
+	public function view_project_template( $template ) {
+		global $post;
+
+		// Determines whether the query is for an existing single page.
+		if ( ! is_page() ) {
+			return $template;
+		}
+
+		// If no posts found, return to avoid "Trying to get property of non-object" error.
+		if ( ! isset( $post ) ) {
+			return $template;
+		}
+
+		if ( ! isset( $this->templates[ get_post_meta( $post->ID, '_wp_page_template', true ) ] ) ) {
+			return $template;
+		}
+
+		$file = CNVS_PATH . 'page-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;
+		}
+
+		return $template;
+	}
+}
+
+new CNVS_Page_Templates();