[mob] Additional check for fileSize for multipart upload

mobile/lib/db/upload_locks_db.dart

@@ -250,6 +250,7 @@ class UploadLocksDB {
     }
     final row = rows.first;
     final objectKey = row[_trackUploadTable.columnObjectKey] as String;
+    final encFileSize = row[_trackUploadTable.columnEncryptedFileSize] as int;
     final partsStatus = await db.query(
       _partsTable.table,
       where: '${_partsTable.columnObjectKey} = ?',
@@ -285,6 +286,7 @@ class UploadLocksDB {
           .byName(row[_trackUploadTable.columnStatus] as String),
       partUploadStatus: partUploadStatus,
       partETags: partETags,
+      encFileSize: encFileSize,
       partSize: row[_trackUploadTable.columnPartSize] as int,
     );
   }

mobile/lib/module/upload/model/multipart.dart

@@ -33,6 +33,7 @@ class MultipartInfo {
   final List<bool>? partUploadStatus;
   final Map<int, String>? partETags;
   final int? partSize;
+  final int encFileSize;
   final MultipartUploadURLs urls;
   final MultipartStatus status;
 
@@ -41,6 +42,7 @@ class MultipartInfo {
     this.partETags,
     this.partSize,
     this.status = MultipartStatus.pending,
+    required this.encFileSize,
     required this.urls,
   });
 }

mobile/lib/module/upload/service/multipart.dart

@@ -148,10 +148,11 @@ class MultiPartUploader {
   Future<String> putMultipartFile(
     MultipartUploadURLs urls,
     File encryptedFile,
+    int fileSize,
   ) async {
     // upload individual parts and get their etags
     final etags = await _uploadParts(
-      MultipartInfo(urls: urls),
+      MultipartInfo(urls: urls, encFileSize: fileSize),
       encryptedFile,
     );
 
@@ -180,6 +181,11 @@ class MultiPartUploader {
     }
 
     final int encFileLength = encryptedFile.lengthSync();
+    if (encFileLength != partInfo.encFileSize) {
+      throw Exception(
+        "File size mismatch. Expected ${partInfo.encFileSize} but got $encFileLength",
+      );
+    }
     // Start parts upload
     int count = 0;
     while (i < partsLength) {

mobile/lib/utils/file_uploader.dart

@@ -685,6 +685,7 @@ class FileUploader {
           fileObjectKey = await _multiPartUploader.putMultipartFile(
             fileUploadURLs,
             encryptedFile,
+            encFileSize,
           );
         }
         // in case of multipart, upload the thumbnail towards the end to avoid