Update Page and Post to use a similar approach to CPTs

mu-plugins/10up-plugin/includes/classes/PostTypes/AbstractCorePostType.php

@@ -0,0 +1,75 @@
+<?php
+/**
+ * AbstractCorePostType
+ *
+ * @package TenUpPlugin
+ */
+
+namespace TenUpPlugin\PostTypes;
+
+/**
+ * Abstract class for core post types.
+ *
+ * This class is intended to be extended by post types that are part of core WordPress functionality.
+ * This allows for a more common interface for core post types and custom post types.
+ * It's unlikely that this class will need to be used directly.
+ */
+abstract class AbstractCorePostType extends AbstractPostType {
+
+	/**
+	 * Get the singular post type label.
+	 *
+	 * No-op for core post types since they are already registered by WordPress.
+	 *
+	 * @return string
+	 */
+	public function get_singular_label() {
+		return '';
+	}
+
+	/**
+	 * Get the plural post type label.
+	 *
+	 * No-op for core post types since they are already registered by WordPress.
+	 *
+	 * @return string
+	 */
+	public function get_plural_label() {
+		return '';
+	}
+
+	/**
+	 * Get the menu icon for the post type.
+	 *
+	 * No-op for core post types since they are already registered by WordPress.
+	 *
+	 * @return string
+	 */
+	public function get_menu_icon() {
+		return '';
+	}
+
+	/**
+	 * Checks whether the Module should run within the current context.
+	 *
+	 * True for core post types since they are already registered by WordPress.
+	 *
+	 * @return bool
+	 */
+	public function can_register() {
+		return true;
+	}
+
+	/**
+	 * Registers a post type and associates its taxonomies.
+	 *
+	 * @uses $this->get_name() to get the post's type name.
+	 * @return Bool Whether this theme has supports for this post type.
+	 */
+	public function register() {
+		$this->register_taxonomies();
+		$this->after_register();
+
+		return true;
+	}
+}

mu-plugins/10up-plugin/includes/classes/PostTypes/Page.php

@@ -11,24 +11,37 @@
 
 /**
  * Page Post Type
+ *
+ * This class is a placeholder for the core Page post type.
+ * It's here to allow engineers to extend the core Page post type in the same way as custom post types.
  */
-class Page extends Module {
+class Page extends AbstractCorePostType {
+
+	/**
+	 * Get the post type name.
+	 *
+	 * @return string
+	 */
+	public function get_name() {
+		return 'page';
+	}
 
 	/**
-	 * Can the class be registered?
+	 * Returns the default supported taxonomies. The subclass should declare the
+	 * Taxonomies that it supports here if required.
 	 *
-	 * @return bool
+	 * @return array
 	 */
-	public function can_register() {
-		return true;
+	public function get_supported_taxonomies() {
+		return [];
 	}
 
 	/**
-	 * Register hooks and filters.
+	 * Run any code after the post type has been registered.
 	 *
 	 * @return void
 	 */
-	public function register() {
-		// Register any hooks/filters you need.
+	public function after_register() {
+		// Do nothing.
 	}
 }

mu-plugins/10up-plugin/includes/classes/PostTypes/Post.php

@@ -7,28 +7,41 @@
 
 namespace TenUpPlugin\PostTypes;
 
-use TenUpPlugin\Module;
-
 /**
  * Post Post type.
+ *
+ * This class is a placeholder for the core Post post type.
+ * It's here to allow engineers to extend the core Post post type in the same way as custom post types.
  */
-class Post extends Module {
+class Post extends AbstractCorePostType {
+
+	/**
+	 * Get the post type name.
+	 *
+	 * @return string
+	 */
+	public function get_name() {
+		return 'post';
+	}
 
 	/**
-	 * Can the class be registered?
+	 * Returns the default supported taxonomies. The subclass should declare the
+	 * Taxonomies that it supports here if required.
+	 *
+	 * Note: This will not remove the default taxonomies that are registered by core.
 	 *
-	 * @return bool
+	 * @return array
 	 */
-	public function can_register() {
-		return true;
+	public function get_supported_taxonomies() {
+		return [];
 	}
 
 	/**
-	 * Register hooks and filters.
+	 * Run any code after the post type has been registered.
 	 *
 	 * @return void
 	 */
-	public function register() {
-		// Register any hooks/filters you need.
+	public function after_register() {
+		// Do nothing.
 	}
 }