From c378131c18c90ae8592bff09681b30f6d6d181e9 Mon Sep 17 00:00:00 2001
From: Pavel Shevaev <pacha.shevaev@gmail.com>
Date: Wed, 7 May 2025 12:15:25 +0300
Subject: [PATCH] Adding bundle patching support for fmt1

---
 pack.inc.php | 99 +++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 86 insertions(+), 13 deletions(-)

diff --git a/pack.inc.php b/pack.inc.php
index e78d2d8..2e665c3 100644
--- a/pack.inc.php
+++ b/pack.inc.php
@@ -92,7 +92,17 @@ function config_patch_bundle(ConfigPackParams $params, string $packed_data) : st
 
   $patched_data = null;
 
-  if($params->binary_format == 2)
+  if($params->binary_format == 1)
+  {
+    $patched_data = _config_patch_bundle_fmt1(
+      $packed_data,
+      $params->cache_entries, 
+      $params->use_lz4,
+      $params->use_config_refs,
+      $params->version,
+    );
+  }
+  else if($params->binary_format == 2)
   {
     $patched_data = _config_patch_bundle_fmt2(
       $packed_data,
@@ -158,12 +168,12 @@ function _config_pack_bundle_fmt1(
     $STRIDMAP[$strid_crc] = $entry->strid; 
 
     $header[] = array(
-      $payloads[$idx][2],
+      $payloads[$idx][2], //format
       $entry->id, 
       crc32($entry->strid), 
       $entry->class_id, 
-      $payloads[$idx][0],
-      $payloads[$idx][3]
+      $payloads[$idx][0], //offset
+      $payloads[$idx][3] //size
     );
   }
 
@@ -344,12 +354,72 @@ function _config_encode_strid_as_indices(string $strid, array &$STRIDMAP, array
   return $strids_indices;
 }
 
+function _config_patch_bundle_fmt1(
+  string $packed_data,
+  array $patch_entries, 
+  bool $use_lz4, 
+  bool $use_config_refs, 
+  int $version
+) : string
+{
+  list($header, $_, $payloads_bundle) = 
+    _config_unpack_bundle_fmt1(packed_data: $packed_data, unpack_entries: false);
+
+  foreach($patch_entries as $idx => $patch_entry)
+  {
+    list($patch_format, $patch_payload) = _config_get_payload($patch_entry, $use_lz4, $use_config_refs);
+
+    $headers_found = array_filter($header, fn($item) => $item[1] == $patch_entry->id); 
+    if($headers_found)
+    {
+      $header_idx = key($headers_found);
+      $header_entry = current($headers_found);
+
+      $current_offset = $header_entry[4];
+      $current_size = $header_entry[5];
+
+      if($current_size >= strlen($patch_payload))
+      {                                         
+        //let's do the inline patching
+        $payloads_bundle = substr_replace($payloads_bundle, $patch_payload, $current_offset, strlen($patch_payload));
+
+        $header_entry[0] = $patch_format;
+        $header_entry[5] = strlen($patch_payload);
+        $header[$header_idx] = $header_entry; 
+      }
+      else
+      {
+        //let's add it to the end
+        $header_entry[0] = $patch_format;
+        $header_entry[4] = strlen($payloads_bundle); //offset
+        $header_entry[5] = strlen($patch_payload);
+        $header[$header_idx] = $header_entry; 
+
+        $payloads_bundle .= $patch_payload;
+      }
+    }
+    else
+      throw new Exception("Patched entry {$patch_entry->id} not found in config bundle");
+  }
+
+  $header_msgpack = config_msgpack_pack($header);
+
+  $patched_data =  
+         pack("C", 1) . 
+         pack("V", $version) . 
+         pack("V", strlen($header_msgpack)) .
+         $header_msgpack .
+         $payloads_bundle;
+
+  return $patched_data;
+}
+
 function _config_patch_bundle_fmt2(
   string $packed_data,
   array $patch_entries, 
   bool $use_lz4, 
   bool $use_config_refs, 
-  int $version,
+  int $version
 ) : string
 {
   list($strids, $header, $_, $payloads_bundle) = 
@@ -523,7 +593,8 @@ function config_unpack_bundle(string $packed_data) : array
 
   if($info['format'] === 1)
   {
-    return _config_unpack_bundle_fmt1($packed_data);
+    list($_, $entries) = _config_unpack_bundle_fmt1($packed_data);
+    return $entries;
   }
   else if($info['format'] === 2)
   {
@@ -539,7 +610,7 @@ function config_unpack_bundle(string $packed_data) : array
     throw new Exception("Unknown format: {$info['format']}");
 }
 
-function _config_unpack_bundle_fmt1(string $packed_data) : array
+function _config_unpack_bundle_fmt1(string $packed_data, bool $unpack_entries = true) : array
 {
   $packed_info = substr($packed_data, 0, 1+4+4);
 
@@ -554,16 +625,19 @@ function _config_unpack_bundle_fmt1(string $packed_data) : array
   $payloads_bundle = substr($packed_data, 1+4+4+$info['header_len']);
   
   $entries = array();
-  foreach($header as $item)
+  if($unpack_entries)
   {
-    list($format, $id, $strid_crc, $class_id, $offset, $size) = $item;
+    foreach($header as $item)
+    {
+      list($format, $id, $strid_crc, $class_id, $offset, $size) = $item;
 
-    $payload = substr($payloads_bundle, $offset, $size);
+      $payload = substr($payloads_bundle, $offset, $size);
 
-    $entries[$id] = array($class_id, _config_unpack_payload($format, $payload)); 
+      $entries[$id] = array($class_id, _config_unpack_payload($format, $payload)); 
+    }
   }
 
-  return $entries;
+  return array($header, $entries, $unpack_entries ? null : $payloads_bundle);
 }
 
 function _config_unpack_bundle_fmt2(string $packed_data, bool $unpack_entries = true) : array
@@ -584,7 +658,6 @@ function _config_unpack_bundle_fmt2(string $packed_data, bool $unpack_entries =
   $payloads_bundle = substr($packed_data, 1+4+4+4+$info['strids_len']+$info['header_len']);
   
   $entries = array();
-
   if($unpack_entries)
   {
     foreach($header as $item)