Disable or make GTIN field readonly depending on when GLA was install…

…ed and what version of WC is installed

src/Admin/Product/Attributes/Input/GTINInput.php

@@ -16,6 +16,11 @@
  */
 class GTINInput extends Text {
 
+	/**
+	 * @var string
+	 */
+	private $disabled_from = '2024-09-20';
+
 	/**
 	 * GTINInput constructor.
 	 */
@@ -24,5 +29,29 @@ public function __construct() {
 
 		$this->set_label( __( 'Global Trade Item Number (GTIN)', 'google-listings-and-ads' ) );
 		$this->set_description( __( 'Global Trade Item Number (GTIN) for your item. These identifiers include UPC (in North America), EAN (in Europe), JAN (in Japan), and ISBN (for books)', 'google-listings-and-ads' ) );
+
+		$this->conditionally_restrict();
+	}
+
+	/**
+	 * If Google for WooCommerce was installed after $this->disabled_from then
+	 * this field will be disabled and not added to the product form.
+	 * 
+	 * If Google for WooCommerce was installed before $this->disabled_from and
+	 * WooCommerce version 9.2 or higher is installed then it will be readonly
+	 *
+	 * @since x.x.x
+	 * @return void
+	 */
+	public function conditionally_restrict(): void {
+		if ( $this->gla_installed_after( $this->disabled_from ) ) {
+			$this->set_disabled( true );
+			return;
+		}
+
+		if ( version_compare( WC_VERSION, '9.2', '>=' ) ) {
+			$this->set_readonly( true );
+			$this->set_description( __( 'The Global Trade Item Number (GTIN) for your item can now be entered on the "Inventory" tab', 'google-listings-and-ads' ) );
+		}
 	}
 }