From 29d7ea2a7a6fad7955a08d62dfcb0ec294c9d3e6 Mon Sep 17 00:00:00 2001
From: Pier-Paolo Mammi <pierpaolo.mammi@gmail.com>
Date: Wed, 13 May 2026 15:45:49 +0200
Subject: [PATCH] add crc32 checksum generation of original file

clean up log statements
---
 scripts/extract-elx/extract-elx.js | 33 ++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/scripts/extract-elx/extract-elx.js b/scripts/extract-elx/extract-elx.js
index 5c34317..bf9ba96 100644
--- a/scripts/extract-elx/extract-elx.js
+++ b/scripts/extract-elx/extract-elx.js
@@ -347,6 +347,15 @@ function formatFileSize(bytes) {
 // FILE OPERATIONS
 // ============================================================================
 
+async function calculateFileCrc32(filePath) {
+  try {
+    const buffer = await fs.readFile(filePath);
+    return (crc32.buf(buffer) >>> 0).toString(16).toUpperCase().padStart(8, '0');
+  } catch (error) {
+    throw new Error(`Failed to calculate CRC32: ${error.message}`);
+  }
+}
+
 /**
  * Read and parse the input JSON file
  */
@@ -376,10 +385,10 @@ async function createOutputDirectory(outputPath, allowOverwrite = false, cleanEx
 
   // Optionally remove existing directory
   if (cleanExisting) {
-    console.log(`Removing existing directory contents: ${outputPath}`);
+    console.log(`   Removing existing directory contents: ${outputPath}`);
     await fs.rm(`${outputPath}`, { recursive: true, force: true });
   } else if (allowOverwrite) {
-    console.log(`Overwriting existing directory: ${outputPath}`);
+    console.log(`   Overwriting existing directory: ${outputPath}`);
   }
 
   try {
@@ -437,6 +446,16 @@ async function saveBackup(outputPath, data) {
   return backupPath;
 }
 
+/**
+ * Create CRC32 checksum file for integrity verification
+ */
+async function createCrc32Checksum(outputPath, inputPath) {
+  const fileCrc32 = await calculateFileCrc32(inputPath);
+  const checksumPath = path.join(outputPath, `crc32.txt`);
+  await fs.writeFile(checksumPath, `${fileCrc32}\n`, 'utf-8');
+  return { checksumPath, fileCrc32 };
+}
+
 // ============================================================================
 // PROPERTY PROCESSING
 // ============================================================================
@@ -664,13 +683,19 @@ async function main() {
     const data = await readInputFile(inputPath);
     const fileStats = await fs.stat(inputPath);
     console.log(`   Size: ${formatFileSize(fileStats.size)}`);
-
+    
     // Create output directory
     console.log(`\n📂 Creating output: ${outputPath}`);
     await createOutputDirectory(outputPath, allowOverwrite, cleanExisting);
+    
+    // Create CRC32 checksum file for integrity verification
+    console.log(`\n🐾 Creating checksum file...`);
+    const crc32 = await createCrc32Checksum(outputPath, inputPath);
+    console.log(`\n   Checksum file: ${crc32.checksumPath}`);
+    //console.log(`   CRC32: ${crc32.fileCrc32}`);
 
     // Process each root property
-    console.log('\n⚙️  Processing properties:\n');
+    console.log('\n⚙️ Processing properties:\n');
     const processedProperties = [];
     const rootProps = Object.keys(data);