From 8226becbee653ff9d5874cc9882b6fc68c6495d9 Mon Sep 17 00:00:00 2001
From: Claas <claas@claas.dev>
Date: Sun, 28 Dec 2025 19:30:10 +0100
Subject: [PATCH] Avoid error from deserialization empty file

---
 app/src/service-worker/serviceWorker.ts | 26 ++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/app/src/service-worker/serviceWorker.ts b/app/src/service-worker/serviceWorker.ts
index bf9969d..9612062 100644
--- a/app/src/service-worker/serviceWorker.ts
+++ b/app/src/service-worker/serviceWorker.ts
@@ -121,26 +121,38 @@ async function deleteClient() {
   }
 }
 
+
+
 async function initializeClient(): Promise<Client> {
   // Have to use wasm-pack --target web to build the wasm package to get the init function because with the bundler target
   // it is included as a top level await which is not supported by service workers according to the web spec
   // Has to be initialized before we do anything with the Rust code. It also needs to be initialized if a client exists
   await initialization;
 
+  console.debug("[Service worker/client initialization]: Initializing client");
   // Try to load existing client
   const directory = await navigator.storage.getDirectory();
   const fileHandle = await getFile(directory, FILE_NAME);
 
-  if (fileHandle !== undefined) {
-    const file = await fileHandle.getFile();
-    const buffer = await file.arrayBuffer();
-    return Client.from_serialized(new Uint8Array(buffer));
+  console.debug("[Service worker/client initialization]: File handle acquired", fileHandle);
+
+  if(fileHandle === undefined || fileHandle.kind !== "file"){
+    console.debug("[Service worker/client initialization]: No file handle, creating new client");
+    const client = new Client();
+    return await persistClient(client);
   }
 
-  // Create new client
-  const client = new Client();
+  const file = await fileHandle.getFile();
+
+  if(file.size === 0) {
+    console.debug("[Service worker/client initialization]: Empty file handle, creating new client");
+    const client = new Client();
+    return await persistClient(client);
+  }
 
-  return await persistClient(client);
+  console.debug("[Service worker/client initialization]: Deserializing client");
+  const buffer = await file.arrayBuffer();
+  return Client.from_serialized(new Uint8Array(buffer));
 }
 
 let getClient = initializeClient();
-- 
2.51.2