Set custom page type in post sidebar was removed by mistake

inc/main.php

@@ -12,6 +12,7 @@
 use TLA_Media\GTM_Kit\Admin\Analytics;
 use TLA_Media\GTM_Kit\Admin\HelpOptionsPage;
 use TLA_Media\GTM_Kit\Admin\IntegrationsOptionsPage;
+use TLA_Media\GTM_Kit\Admin\MetaBox;
 use TLA_Media\GTM_Kit\Admin\SetupWizard;
 use TLA_Media\GTM_Kit\Common\RestAPIServer;
 use TLA_Media\GTM_Kit\Common\Util;
@@ -135,6 +136,7 @@ function gtmkit_admin_init(): void {
 	$util            = new Util( $rest_api_server );
 
 	Analytics::register( $options, $util );
+	MetaBox::register( $options );
 	SetupWizard::register();
 	GeneralOptionsPage::register();
 	IntegrationsOptionsPage::register();

readme.txt

@@ -93,6 +93,7 @@ Yes! Pagespeed is one of our main focus points, and we strive to make the plugin
 Enhancements:
 
 Bugfixes:
+* Set custom page type in post sidebar was removed by mistake in 1.14
 
 Other:
 

src/Admin/MetaBox.php

@@ -0,0 +1,121 @@
+<?php
+/**
+ * GTM Kit plugin file.
+ *
+ * @package GTM Kit
+ */
+
+namespace TLA_Media\GTM_Kit\Admin;
+
+use TLA_Media\GTM_Kit\Options;
+
+/**
+ * MetaBox
+ */
+final class MetaBox {
+
+	/**
+	 * Plugin options.
+	 *
+	 * @var Options
+	 */
+	protected $options;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param Options $options The Options instance.
+	 */
+	public function __construct( Options $options ) {
+		$this->options = $options;
+	}
+
+	/**
+	 * Register meta box
+	 *
+	 * @param Options $options The Options instance.
+	 */
+	public static function register( Options $options ): void {
+		$page = new MetaBox( $options );
+
+		add_action( 'add_meta_boxes', [ $page, 'add_meta_boxes' ] );
+		add_action( 'save_post', [ $page, 'save_meta_box_options' ] );
+	}
+
+	/**
+	 * Add "GTM Kit" meta box
+	 */
+	public function add_meta_boxes() {
+		if ( current_user_can( 'manage_options' ) ) {
+			$post_types = get_post_types(
+				[
+					'public' => true,
+				],
+				'objects'
+			);
+			if ( isset( $post_types['attachment'] ) ) {
+				unset( $post_types['attachment'] );
+			}
+
+			foreach ( $post_types as $post_type => $post_type_object ) {
+				$label = $post_type_object->labels->singular_name;
+				add_meta_box(
+					'gtmkit_options',
+					sprintf( __( 'GTM Kit', 'gtm-kit' ), $label ),
+					[
+						$this,
+						'display_meta_boxes',
+					],
+					$post_type,
+					'side',
+					'core'
+				);
+			}
+		}
+	}
+
+	/**
+	 * Displays some checkbox to de/activate some cache options
+	 */
+	public function display_meta_boxes() {
+		if ( current_user_can( 'manage_options' ) ) {
+			wp_nonce_field( 'gtmkit_box_option', '_gtmkitnonce', false );
+			$page_type = get_post_meta( get_the_ID(), 'gtmkit_page_type', true );
+			?>
+			<div class="gtmkit_options">
+
+				<label for="gtmkit_option_page_type"
+						style="font-weight: bold;"><?php esc_html_e( 'Set page type in datalayer:', 'gtm-kit' ); ?></label>
+				<input name="gtmkit_option[page_type]" id="gtmkit_option_page_type" type="text"
+						title="<?php esc_html_e( 'Page type', 'gtm-kit' ); ?>" value="<?php echo esc_attr( $page_type ); ?>">
+
+				<p class="gtmkit-note" style="margin-top: 16px;">
+					<?php
+					// translators: %1$s = opening strong tag, %2$s = closing strong tag.
+					printf( esc_html__( '%1$sNote:%2$s This will only be applied if page type has been activated in the global settings of GTM Kit.', 'gtm-kit' ), '<strong>', '</strong>' );
+					?>
+				</p>
+			</div>
+			<?php
+		}
+	}
+
+	/**
+	 * Manage the cache options from the meta box.
+	 */
+	public function save_meta_box_options() {
+		if ( current_user_can( 'manage_options' ) && isset( $_POST['post_ID'], $_POST['_gtmkitnonce'] ) ) {
+
+			check_admin_referer( 'gtmkit_box_option', '_gtmkitnonce' );
+
+			if ( isset( $_POST['gtmkit_option']['page_type'] ) ) {
+				if ( empty( $_POST['gtmkit_option']['page_type'] ) ) {
+					delete_post_meta( (int) $_POST['post_ID'], 'gtmkit_page_type' );
+				} else {
+					update_post_meta( (int) $_POST['post_ID'], 'gtmkit_page_type', $_POST['gtmkit_option']['page_type'] );
+				}
+			}
+		}
+	}
+}
+