Improve error handling when posting new messages (#892)

* send an error or if no text was written

* fix loading indicator

* fix lastIsError code

src/lib/components/chat/ChatMessage.svelte

@@ -106,7 +106,7 @@
  clearTimeout(pendingTimeout);
 
  // Add loading animation to the last message if update takes more than 600ms
- if ((loading && isLast) || emptyLoad) {
+ if (isLast && loading && emptyLoad) {
  pendingTimeout = setTimeout(() => {
  if (contentEl) {
  loadingEl = new IconLoading({

src/lib/components/chat/ChatWindow.svelte

@@ -86,7 +86,10 @@
  const convTreeStore = useConvTreeStore();
 
  $: lastMessage = browser && (messages.find((m) => m.id == $convTreeStore.leaf) as Message);
- $: lastIsError = lastMessage && lastMessage.from === "user" && !loading;
+ $: lastIsError =
+ lastMessage &&
+ ((lastMessage.from === "user" && !loading) ||
+ lastMessage.updates?.findIndex((u) => u.type === "status" && u.status === "error") !== -1);
 
  $: sources = files.map((file) => file2base64(file));
 
@@ -242,7 +245,7 @@
  on:click={() => {
  if (lastMessage && lastMessage.ancestors) {
  dispatch("retry", {
- id: lastMessage.ancestors[lastMessage.ancestors.length - 1],
+ id: lastMessage.id,
  });
  }
  }}

src/routes/conversation/[id]/+server.ts

@@ -377,6 +377,15 @@ export async function POST({ request, locals, params, getClientAddress }) {
  }
  } catch (e) {
  update({ type: "status", status: "error", message: (e as Error).message });
+ } finally {
+ // check if no output was generated
+ if (messageToWriteTo.content === previousText) {
+ update({
+ type: "status",
+ status: "error",
+ message: "No output was generated. Something went wrong.",
+ });
+ }
  }
 
  await collections.conversations.updateOne(