Add quote visibility setting for Classic Editor (#2374)

Author: obenland

.github/changelog/2374-from-description

@@ -0,0 +1,4 @@
+Significance: minor
+Type: added
+
+Add quote visibility setting for Classic Editor users.

integration/class-classic-editor.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * Classic Editor integration file.
+ *
+ * @package Activitypub
+ */
+
+namespace Activitypub\Integration;
+
+/**
+ * Classic Editor integration class.
+ *
+ * Handles compatibility with the Classic Editor plugin and sites without block editor support.
+ */
+class Classic_Editor {
+
+	/**
+	 * Initialize the class, registering WordPress hooks.
+	 */
+	public static function init() {
+		\add_action( 'post_comment_status_meta_box-options', array( self::class, 'add_quote_policy_field' ) );
+		\add_action( 'save_post', array( self::class, 'save_quote_policy' ) );
+	}
+
+	/**
+	 * Add quote policy field to the Discussion meta box.
+	 *
+	 * @param \WP_Post $post The post object.
+	 */
+	public static function add_quote_policy_field( $post ) {
+		// Only add field for post types that support ActivityPub.
+		if ( ! \post_type_supports( $post->post_type, 'activitypub' ) ) {
+			return;
+		}
+
+		// Add nonce for security.
+		\wp_nonce_field( 'activitypub_quote_policy', 'activitypub_quote_policy_nonce' );
+
+		// Get current value.
+		$quote_interaction_policy = \get_post_meta( $post->ID, 'activitypub_interaction_policy_quote', true ) ?: ACTIVITYPUB_INTERACTION_POLICY_ANYONE; // phpcs:ignore Universal.Operators.DisallowShortTernary
+		?>
+		<br class="clear" />
+		<label for="activitypub_allow_quotes" class="selectit">
+			<input name="activitypub_allow_quotes" type="checkbox" id="activitypub_allow_quotes" value="1" <?php \checked( $quote_interaction_policy, ACTIVITYPUB_INTERACTION_POLICY_ANYONE ); ?> />
+			<?php \esc_html_e( 'Allow quotes from the Fediverse', 'activitypub' ); ?>
+		</label>
+		<?php
+	}
+
+	/**
+	 * Save quote policy data.
+	 *
+	 * @param int $post_id The post ID.
+	 */
+	public static function save_quote_policy( $post_id ) {
+		// Check if this is an autosave.
+		if ( \defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
+			return;
+		}
+
+		// Only process if nonce is set (meaning we're saving from the post editor).
+		if ( ! isset( $_POST['activitypub_quote_policy_nonce'] ) ) {
+			return;
+		}
+
+		// Verify nonce.
+		if ( ! \wp_verify_nonce( \sanitize_text_field( \wp_unslash( $_POST['activitypub_quote_policy_nonce'] ) ), 'activitypub_quote_policy' ) ) {
+			return;
+		}
+
+		// Only process for post types that support ActivityPub.
+		if ( ! \post_type_supports( \get_post_type( $post_id ), 'activitypub' ) ) {
+			return;
+		}
+
+		// Check user permissions.
+		if ( ! \current_user_can( 'edit_post', $post_id ) ) {
+			return;
+		}
+
+		// Save quote interaction policy based on checkbox.
+		if ( '1' === \sanitize_text_field( \wp_unslash( $_POST['activitypub_allow_quotes'] ?? '0' ) ) ) {
+			// Checked: allow anyone to quote (default value).
+			\update_post_meta( $post_id, 'activitypub_interaction_policy_quote', ACTIVITYPUB_INTERACTION_POLICY_ANYONE );
+		} else {
+			// Unchecked: only allow "just me" to quote.
+			\update_post_meta( $post_id, 'activitypub_interaction_policy_quote', ACTIVITYPUB_INTERACTION_POLICY_ME );
+		}
+	}
+}

integration/load.php

@@ -7,12 +7,26 @@
 
 namespace Activitypub\Integration;
 
+use function Activitypub\site_supports_blocks;
+
 \Activitypub\Autoloader::register_path( __NAMESPACE__, __DIR__ );
 
 /**
  * Initialize the ActivityPub integrations.
  */
 function plugin_init() {
+	/**
+	 * Adds Classic Editor support.
+	 *
+	 * This class handles the compatibility with the Classic Editor plugin
+	 * and sites without block editor support.
+	 *
+	 * @see https://wordpress.org/plugins/classic-editor/
+	 */
+	if ( class_exists( '\Classic_Editor' ) || ! site_supports_blocks() ) {
+		Classic_Editor::init();
+	}
+
 	/**
 	 * Adds WebFinger (plugin) support.
 	 *