added the uninstall file

src/Admin/Settings_Page.php

@@ -101,37 +101,6 @@ public function support_links(): void {
 		);
 	}
 
-	/**
-	 * Product Tab setting lists.
-	 *
-	 * @since 2.0.2
-	 *
-	 * @return array Add custom settings for product tabs.
-	 */
-	public function wpt_get_settings() {
-		$settings = [
-			'tab_section'                => [
-				'name' => esc_html__( 'Product Tab Settings', 'woocommerce-product-tabs' ),
-				'type' => 'title',
-				'id'   => 'wpt_tab_section',
-			],
-			'wpt_disable_content_filter' => [
-				'name'    => esc_html__( 'Disable the_content Filter', 'woocommerce-product-tabs' ),
-				'type'    => 'checkbox',
-				'desc'    => esc_html__( 'Enable this checkbox if you are using a page builder and have problems with the content preview.', 'woocommerce-product-tabs' ),
-				'default' => 'no',
-				'class'   => 'wpt_disable_content_filter',
-				'id'      => 'wpt_disable_content_filter',
-			],
-			'tab_section_end'            => [
-				'type' => 'sectionend',
-				'id'   => 'wpt_tab_section_end',
-			],
-		];
-
-		return $settings;
-	}
-
 	public function get_settings_page_footer() {
 		do_action( 'barn2_after_plugin_settings', $this->plugin->get_id() );
 		?>
@@ -166,6 +135,13 @@ function register_plugin_option_fields() {
 		register_setting( 'wpt_group', 'wpt_options', 'validate_plugin_options' );
 		add_settings_section( 'wpt_option_section', __( 'Tab options', 'woocommerce-product-tabs' ), [], 'wpt-options' );
 		add_settings_field( 'disable_content_filter', __( 'Page builder support', 'woocommerce-product-tabs' ), [ $this, 'disable_content_filter' ], 'wpt-options', 'wpt_option_section' );
+		add_settings_field(
+			'delete_data',
+			__( 'Uninstalling ' . $this->plugin->get_name(), 'woocommerce-product-tabs' ),
+			[ $this, 'delete_data' ],
+			'wpt-options',
+			'wpt_option_section'
+		);
 	}
 
 	/**
@@ -250,6 +226,17 @@ function admin_product_tabs_options_page() {
 		$this->get_settings_page_footer();
 	}
 
+	public function delete_data() {
+		echo '<fieldset>';
+		$delete_data = Util::get_option( 'delete_data' );
+		echo '<label class="checkbox-row" for="delete_data">';
+		?>
+		<input type="checkbox" name="wpt_options[delete_data]" id="delete_data" value="1" <?php checked( 1, $delete_data ); ?> />
+		<?php
+		_e( 'Permanently delete all ' . $this->plugin->get_name() . ' settings and data when uninstalling the plugin', 'woocommerce-product-tabs' );
+		echo ' </label><br /></fieldset>';
+	}
+
 	/**
 	 * Change the default support link to the WordPress repository
 	 */

uninstall.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * Fired when the plugin is uninstalled.
+ *
+ * @package   Barn2\woocommerce-product-tabs
+ * @author    Barn2 Plugins <[email protected]>
+ * @license   GPL-3.0
+ * @copyright Barn2 Media Ltd
+ */
+
+// If uninstall not called from WordPress, then exit.
+if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
+	exit;
+}
+
+$settings = get_option( 'wpt_options', [] );
+
+if ( ! isset( $settings['delete_data'] ) || ! $settings['delete_data'] ) {
+	return;
+}
+
+foreach ( $settings as $option ) {
+	delete_option( $option );
+}
+
+// Delete all the tabs
+$tabs = get_posts( array(
+    'post_type'      => 'woo_product_tab',
+    'posts_per_page' => -1,
+    'post_status'    => 'any',
+) );
+
+foreach ( $tabs as $tab ) {
+    wp_delete_post( $tab->ID, true );
+}
+
+// Delete all the custom tabs including content and icon
+global $wpdb;
+
+// Get all WooCommerce products
+$product_ids = $wpdb->get_col( "
+    SELECT ID FROM {$wpdb->posts}
+    WHERE post_type = 'product'
+" );
+foreach ( $product_ids as $product_id ) {
+    // Delete meta keys containing '_wpt_override_', '_wpt_field_', '_wpt_icon_'
+    $meta_keys = array(
+        '_wpt_override_',
+        '_wpt_field_',
+        '_wpt_icon_'
+    );
+
+    foreach ( $meta_keys as $key ) {
+        $wpdb->query( $wpdb->prepare(
+            "DELETE FROM {$wpdb->postmeta}
+             WHERE post_id = %d
+             AND meta_key LIKE %s",
+             $product_id, '%' . $wpdb->esc_like($key) . '%'
+        ) );
+    }
+}