Add term meta infra implementation.

includes/Core/Storage/Meta_Interface.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * Interface Google\Site_Kit\Core\Storage\Meta_Interface
+ *
+ * @package   Google\Site_Kit\Core\Storage
+ * @copyright 2021 Google LLC
+ * @license   https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
+ * @link      https://sitekit.withgoogle.com
+ */
+
+namespace Google\Site_Kit\Core\Storage;
+
+/**
+ * Interface for object meta implementations.
+ *
+ * @since 1.33.0
+ * @since n.e.x.t Renamed from Post_Meta_Interface to Meta_Interface.
+ *
+ * @access private
+ * @ignore
+ */
+interface Meta_Interface {
+
+	/**
+	 * Gets object meta.
+	 *
+	 * @since 1.33.0
+	 *
+	 * @param int    $object_id Object ID.
+	 * @param string $key       Metadata key.
+	 * @param bool   $single    Whether to return a single value.
+	 * @return mixed Object meta value.
+	 */
+	public function get( $object_id, $key, $single = false );
+
+	/**
+	 * Updates an object meta field based on the given object ID.
+	 *
+	 * @since 1.33.0
+	 *
+	 * @param int    $object_id Object ID.
+	 * @param string $key       Metadata key.
+	 * @param mixed  $value     Metadata value.
+	 * @param mixed  $prev_value Previous value to check before updating. If specified, only update existing metadata entries with this value. Otherwise, update all entries.
+	 * @return bool TRUE on success, otherwise FALSE.
+	 */
+	public function update( $object_id, $key, $value, $prev_value = '' );
+
+	/**
+	 * Adds a meta field to the given object.
+	 *
+	 * @since 1.33.0
+	 *
+	 * @param int    $object_id Object ID.
+	 * @param string $key       Metadata key.
+	 * @param mixed  $value     Metadata value.
+	 * @param bool   $unique    Whether the same key should not be added.
+	 * @return int|bool Meta id on success, otherwise FALSE.
+	 */
+	public function add( $object_id, $key, $value, $unique = false );
+
+	/**
+	 * Deletes an object meta field for the given object ID.
+	 *
+	 * @since 1.33.0
+	 *
+	 * @param int    $object_id Object ID.
+	 * @param string $key       Metadata key.
+	 * @param mixed  $value     Metadata value. If provided, rows will only be removed that match the value.
+	 * @return bool TRUE on success, otherwise FALSE.
+	 */
+	public function delete( $object_id, $key, $value = '' );
+}

includes/Core/Storage/Post_Meta_Setting.php → includes/Core/Storage/Meta_Setting_Trait.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Class Google\Site_Kit\Core\Storage\Post_Meta_Setting
+ * Class Google\Site_Kit\Core\Storage\Meta_Setting_Trait
  *
  * @package   Google\Site_Kit\Core\Storage
  * @copyright 2021 Google LLC
@@ -11,50 +11,49 @@
 namespace Google\Site_Kit\Core\Storage;
 
 /**
- * Base class for a single post meta setting.
+ * Base class for a single object meta setting.
  *
  * @since 1.33.0
+ * @since n.e.x.t Changed from Post_Meta_Setting to Meta_Setting_Trait.
+ *
  * @access private
  * @ignore
  */
-abstract class Post_Meta_Setting {
-
+trait Meta_Setting_Trait {
 	/**
-	 * Post_Meta_Interface implementation.
+	 * Meta_Interface implementation.
 	 *
 	 * @since 1.33.0
-	 * @var Post_Meta_Interface
+	 * @var Meta_Interface
 	 */
-	protected $post_meta;
+	protected $meta;
 
 	/**
-	 * Post_Meta_Setting constructor.
+	 * Gets the meta key for the setting.
 	 *
-	 * @since 1.33.0
+	 * @since n.e.x.t
 	 *
-	 * @param Post_Meta_Interface $post_meta Post_Meta_Interface instance.
+	 * @return string Meta key.
 	 */
-	public function __construct( Post_Meta_Interface $post_meta ) {
-		$this->post_meta = $post_meta;
-	}
+	abstract protected function get_meta_key(): string;
 
 	/**
-	 * Gets the meta key for the setting.
+	 * Gets the object type like `post`, `term`, etc.
 	 *
 	 * @since n.e.x.t
 	 *
-	 * @return string Meta key.
+	 * @return string Object type.
 	 */
-	abstract protected function get_meta_key(): string;
+	abstract protected function get_object_type(): string;
 
 	/**
-	 * Registers the post setting in WordPress.
+	 * Registers the object setting in WordPress.
 	 *
 	 * @since 1.33.0
 	 */
 	public function register() {
 		register_meta(
-			'post',
+			$this->get_object_type(),
 			$this->get_meta_key(),
 			array(
 				'type'              => $this->get_type(),
@@ -111,7 +110,7 @@ protected function get_sanitize_callback() {
 	}
 
 	/**
-	 * Gets the `show_in_rest` value for this postmeta setting value.
+	 * Gets the `show_in_rest` value for this meta setting value.
 	 *
 	 * @since 1.37.0
 	 *
@@ -122,55 +121,59 @@ protected function get_show_in_rest() {
 	}
 
 	/**
-	 * Checks whether a post meta exists or not.
+	 * Checks whether meta exists for a given object or not.
 	 *
 	 * @since 1.33.0
+	 * @since n.e.x.t Changed `$post_id` parameter to `$object_id`.
 	 *
-	 * @param int $post_id Post ID.
+	 * @param int $object_id Object ID.
 	 * @return bool True if the meta key exists, otherwise false.
 	 */
-	public function has( $post_id ) {
-		return metadata_exists( 'post', $post_id, $this->get_meta_key() );
+	public function has( $object_id ) {
+		return metadata_exists( $this->get_object_type(), $object_id, $this->get_meta_key() );
 	}
 
 	/**
 	 * Gets the value of the setting.
 	 *
 	 * @since 1.33.0
+	 * @since n.e.x.t Changed `$post_id` parameter to `$object_id`.
 	 *
-	 * @param int $post_id Post ID.
+	 * @param int $object_id Object ID.
 	 * @return mixed Value set for the setting, or default if not set.
 	 */
-	public function get( $post_id ) {
-		if ( ! $this->has( $post_id ) ) {
+	public function get( $object_id ) {
+		if ( ! $this->has( $object_id ) ) {
 			return $this->get_default();
 		}
 
-		return $this->post_meta->get( $post_id, $this->get_meta_key(), true );
+		return $this->meta->get( $object_id, $this->get_meta_key(), true );
 	}
 
 	/**
-	 * Updates the post setting for the given post ID.
+	 * Updates the setting for the given object ID.
 	 *
 	 * @since 1.33.0
+	 * @since n.e.x.t Changed `$post_id` parameter to `$object_id`.
 	 *
-	 * @param int   $post_id Post ID.
-	 * @param mixed $value   Metadata value.
+	 * @param int   $object_id Object ID.
+	 * @param mixed $value     Metadata value.
 	 * @return bool TRUE on success, otherwise FALSE.
 	 */
-	public function set( $post_id, $value ) {
-		return $this->post_meta->update( $post_id, $this->get_meta_key(), $value );
+	public function set( $object_id, $value ) {
+		return $this->meta->update( $object_id, $this->get_meta_key(), $value );
 	}
 
 	/**
-	 * Deletes the post setting for the given post ID.
+	 * Deletes the setting for the given object ID.
 	 *
 	 * @since 1.33.0
+	 * @since n.e.x.t Changed `$post_id` parameter to `$object_id`.
 	 *
-	 * @param int $post_id Post ID.
+	 * @param int $object_id Object ID.
 	 * @return bool TRUE on success, otherwise FALSE.
 	 */
-	public function delete( $post_id ) {
-		return $this->post_meta->delete( $post_id, $this->get_meta_key() );
+	public function delete( $object_id ) {
+		return $this->meta->delete( $object_id, $this->get_meta_key() );
 	}
 }

includes/Core/Storage/Post_Meta.php

@@ -17,7 +17,7 @@
  * @access private
  * @ignore
  */
-final class Post_Meta implements Post_Meta_Interface {
+final class Post_Meta implements Meta_Interface {
 
 	/**
 	 * Gets post meta.

includes/Core/Storage/Post_Meta_Interface.php → includes/Core/Storage/Term_Meta.php

@@ -1,71 +1,79 @@
 <?php
 /**
- * Interface Google\Site_Kit\Core\Storage\Post_Meta_Interface
+ * Class Google\Site_Kit\Core\Storage\Term_Meta
  *
  * @package   Google\Site_Kit\Core\Storage
- * @copyright 2021 Google LLC
+ * @copyright 2025 Google LLC
  * @license   https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
  * @link      https://sitekit.withgoogle.com
  */
 
 namespace Google\Site_Kit\Core\Storage;
 
 /**
- * Interface for Post_Meta implementations.
+ * Term metadata storage class.
  *
- * @since 1.33.0
+ * @since n.e.x.t
  * @access private
  * @ignore
  */
-interface Post_Meta_Interface {
+final class Term_Meta implements Meta_Interface {
 
 	/**
-	 * Gets post meta.
+	 * Gets term meta.
 	 *
-	 * @since 1.33.0
+	 * @since n.e.x.t
 	 *
-	 * @param int    $post_id Post ID.
+	 * @param int    $term_id Term ID.
 	 * @param string $key     Metadata key.
 	 * @param bool   $single  Whether to return a single value.
-	 * @return mixed Post meta value.
+	 * @return mixed Term meta value.
 	 */
-	public function get( $post_id, $key, $single = false );
+	public function get( $term_id, $key, $single = false ) {
+		return get_term_meta( $term_id, $key, $single );
+	}
 
 	/**
-	 * Updates a post meta field based on the given post ID.
+	 * Updates a term meta field based on the given term ID.
 	 *
-	 * @since 1.33.0
+	 * @since n.e.x.t
 	 *
-	 * @param int    $post_id    Post ID.
+	 * @param int    $term_id    Term ID.
 	 * @param string $key        Metadata key.
 	 * @param mixed  $value      Metadata value.
 	 * @param mixed  $prev_value Previous value to check before updating. If specified, only update existing metadata entries with this value. Otherwise, update all entries.
 	 * @return bool TRUE on success, otherwise FALSE.
 	 */
-	public function update( $post_id, $key, $value, $prev_value = '' );
+	public function update( $term_id, $key, $value, $prev_value = '' ) {
+		return update_term_meta( $term_id, $key, $value, $prev_value );
+	}
 
 	/**
-	 * Adds a meta field to the given post.
+	 * Adds a meta field to the given term.
 	 *
-	 * @since 1.33.0
+	 * @since n.e.x.t
 	 *
-	 * @param int    $post_id Post ID.
+	 * @param int    $term_id Term ID.
 	 * @param string $key     Metadata key.
 	 * @param mixed  $value   Metadata value.
 	 * @param bool   $unique  Whether the same key should not be added.
 	 * @return int|bool Meta id on success, otherwise FALSE.
 	 */
-	public function add( $post_id, $key, $value, $unique = false );
+	public function add( $term_id, $key, $value, $unique = false ) {
+		return add_term_meta( $term_id, $key, $value, $unique );
+	}
 
 	/**
-	 * Deletes a post meta field for the given post ID.
+	 * Deletes a term meta field for the given term ID.
 	 *
-	 * @since 1.33.0
+	 * @since n.e.x.t
 	 *
-	 * @param int    $post_id Post ID.
+	 * @param int    $term_id Term ID.
 	 * @param string $key     Metadata key.
 	 * @param mixed  $value   Metadata value. If provided, rows will only be removed that match the value.
 	 * @return bool TRUE on success, otherwise FALSE.
 	 */
-	public function delete( $post_id, $key, $value = '' );
+	public function delete( $term_id, $key, $value = '' ) {
+		return delete_term_meta( $term_id, $key, $value );
+	}
 }

includes/Modules/Reader_Revenue_Manager/Post_Product_ID.php

@@ -11,7 +11,7 @@
 namespace Google\Site_Kit\Modules\Reader_Revenue_Manager;
 
 use Google\Site_Kit\Core\Storage\Post_Meta;
-use Google\Site_Kit\Core\Storage\Post_Meta_Setting;
+use Google\Site_Kit\Core\Storage\Meta_Setting_Trait;
 
 /**
  * Class for associating product ID to post meta.
@@ -20,7 +20,10 @@
  * @access private
  * @ignore
  */
-class Post_Product_ID extends Post_Meta_Setting {
+class Post_Product_ID {
+
+	use Meta_Setting_Trait;
+
 	/**
 	 * Publication ID.
 	 *
@@ -39,8 +42,7 @@ class Post_Product_ID extends Post_Meta_Setting {
 	 * @param string    $publication_id Publication ID.
 	 */
 	public function __construct( Post_Meta $post_meta, string $publication_id ) {
-		parent::__construct( $post_meta );
-
+		$this->meta           = $post_meta;
 		$this->publication_id = $publication_id;
 	}
 
@@ -55,6 +57,17 @@ protected function get_meta_key(): string {
 		return 'googlesitekit_rrm_' . $this->publication_id . ':productID';
 	}
 
+	/**
+	 * Returns the object type.
+	 *
+	 * @since n.e.x.t
+	 *
+	 * @return string Object type.
+	 */
+	protected function get_object_type(): string {
+		return 'post';
+	}
+
 	/**
 	 * Gets the `show_in_rest` value for this postmeta setting value.
 	 *