fix: fatal error on servers with broken FTP filesystem configuration

On some server setups (e.g. nginx with FTP configured but no active
connection), WordPress initializes its FTP filesystem driver but fails
when it tries to use it, throwing a PHP fatal error that crashes the
page. Wrap the filesystem calls in a try/catch so any such failure
falls back to the bundled customization.js gracefully.

Author: HardeepAsrani

classes/Visualizer/Module.php

@@ -529,50 +529,53 @@ protected function get_user_customization_js() {
 			return $default;
 		}
 
-		require_once( ABSPATH . 'wp-admin/includes/file.php' );
-		WP_Filesystem();
-		global $wp_filesystem;
-		if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
-			$creds = request_filesystem_credentials( site_url() );
-			wp_filesystem( $creds );
-		}
+		try {
+			require_once( ABSPATH . 'wp-admin/includes/file.php' );
+			WP_Filesystem();
+			global $wp_filesystem;
+			if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
+				return $default;
+			}
 
-		$multisite_arg = '/';
-		if ( is_multisite() && ! is_main_site() ) {
-			$multisite_arg = '/sites/' . get_current_blog_id() . '/';
-		}
+			$multisite_arg = '/';
+			if ( is_multisite() && ! is_main_site() ) {
+				$multisite_arg = '/sites/' . get_current_blog_id() . '/';
+			}
 
-		$dir    = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer';
-		$file   = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer/customization.js';
+			$dir    = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer';
+			$file   = $wp_filesystem->wp_content_dir() . 'uploads' . $multisite_arg . 'visualizer/customization.js';
 
-		if ( $wp_filesystem->is_readable( $file ) ) {
-			return $specific;
-		}
-
-		if ( $wp_filesystem->exists( $file ) && ! $wp_filesystem->is_readable( $file ) ) {
-			do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to read file %s', $file ), 'error', __FILE__, __LINE__ );
-			return $default;
-		}
+			if ( $wp_filesystem->is_readable( $file ) ) {
+				return $specific;
+			}
 
-		if ( ! $wp_filesystem->exists( $dir ) ) {
-			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
-			if ( ( $done = $wp_filesystem->mkdir( $dir ) ) === false ) {
-				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to create directory %s', $dir ), 'error', __FILE__, __LINE__ );
+			if ( $wp_filesystem->exists( $file ) && ! $wp_filesystem->is_readable( $file ) ) {
+				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to read file %s', $file ), 'error', __FILE__, __LINE__ );
 				return $default;
 			}
-		}
 
-		// if file does not exist, copy.
-		if ( ! $wp_filesystem->exists( $file ) ) {
-			$src    = str_replace( ABSPATH, $wp_filesystem->abspath(), VISUALIZER_ABSPATH . '/js/customization.js' );
-			// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
-			if ( ( $done = $wp_filesystem->copy( $src, $file ) ) === false ) {
-				do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to copy file %s to %s', $src, $file ), 'error', __FILE__, __LINE__ );
-				return $default;
+			if ( ! $wp_filesystem->exists( $dir ) ) {
+				// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
+				if ( ( $done = $wp_filesystem->mkdir( $dir ) ) === false ) {
+					do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to create directory %s', $dir ), 'error', __FILE__, __LINE__ );
+					return $default;
+				}
+			}
+
+			// if file does not exist, copy.
+			if ( ! $wp_filesystem->exists( $file ) ) {
+				$src    = str_replace( ABSPATH, $wp_filesystem->abspath(), VISUALIZER_ABSPATH . '/js/customization.js' );
+				// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
+				if ( ( $done = $wp_filesystem->copy( $src, $file ) ) === false ) {
+					do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'Unable to copy file %s to %s', $src, $file ), 'error', __FILE__, __LINE__ );
+					return $default;
+				}
 			}
-		}
 
-		return $specific;
+			return $specific;
+		} catch ( \Throwable $e ) {
+			return $default;
+		}
 	}
 
 	/**