From e6b5dd70b2bca478639a55c2386a99cde4e944ee Mon Sep 17 00:00:00 2001
From: Muhammad Yousuf Fazal <m.yousuf.fazal@gmail.com>
Date: Wed, 25 Oct 2023 14:33:09 +0500
Subject: [PATCH] Normalization of Variable

Signed-off-by: Muhammad Yousuf Fazal <m.yousuf.fazal@gmail.com>
---
 src/Domain/ContentRenderer/CodeRenderer.php | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/Domain/ContentRenderer/CodeRenderer.php b/src/Domain/ContentRenderer/CodeRenderer.php
index 2cd909b..5e4d46f 100644
--- a/src/Domain/ContentRenderer/CodeRenderer.php
+++ b/src/Domain/ContentRenderer/CodeRenderer.php
@@ -58,7 +58,7 @@ private function getWrapperAttributes( string $contentUrl ): array {
 		$attributes['class'] = $this->getWrapperClasses();
 
 		if ( !empty( $this->showSpecificLines ) ) {
-			$attributes['data-show-lines'] = $this->showSpecificLines;
+			$attributes['data-show-lines'] = $this->lineNormalizer( $this->showSpecificLines );
 		}
 
 		$attributes['data-toolbar-order'] = 'copy-to-clipboard';
@@ -71,4 +71,21 @@ private function getWrapperAttributes( string $contentUrl ): array {
 		return $attributes;
 	}
 
+	/**
+	 * @return string
+	 */
+	private function lineNormalizer( string $lines ) {
+		$exploded = explode( ',', preg_replace( '/\s+/', '', $lines ) );
+
+		$ranges = array_filter( $exploded, function( $value ) {
+			if ( preg_match( '/^\d+$/', $value ) || preg_match( '/^(\d+)-(\d+)$/', $value ) ) {
+				return true;
+			}
+			else {
+				return false;
+			}
+		});
+		
+		return implode( ',', $ranges );
+	}
 }