server : (webui) introduce conversation branching + idb storage (ggml-org#11792)

* server : (webui) introduce conversation branching + idb storage

* mark old conv as "migrated" instead deleting them

* improve migration

* add more comments

* more clarification

Author: ngxson

examples/server/public/index.html.gz

@@ -16,6 +16,7 @@
     "@vscode/markdown-it-katex": "^1.1.1",
     "autoprefixer": "^10.4.20",
     "daisyui": "^4.12.14",
+    "dexie": "^4.0.11",
     "highlight.js": "^11.10.0",
     "katex": "^0.16.15",
     "postcss": "^8.4.49",

examples/server/webui/package-lock.json

@@ -3,6 +3,7 @@ import { useAppContext } from '../utils/app.context';
 import { Message, PendingMessage } from '../utils/types';
 import { classNames } from '../utils/misc';
 import MarkdownDisplay, { CopyButton } from './MarkdownDisplay';
+import { ChevronLeftIcon, ChevronRightIcon } from '@heroicons/react/24/outline';
 
 interface SplitMessage {
   content: PendingMessage['content'];
@@ -12,17 +13,24 @@ interface SplitMessage {
 
 export default function ChatMessage({
   msg,
+  siblingLeafNodeIds,
+  siblingCurrIdx,
   id,
-  scrollToBottom,
+  onRegenerateMessage,
+  onEditMessage,
+  onChangeSibling,
   isPending,
 }: {
   msg: Message | PendingMessage;
+  siblingLeafNodeIds: Message['id'][];
+  siblingCurrIdx: number;
   id?: string;
-  scrollToBottom: (requiresNearBottom: boolean) => void;
+  onRegenerateMessage(msg: Message): void;
+  onEditMessage(msg: Message, content: string): void;
+  onChangeSibling(sibling: Message['id']): void;
   isPending?: boolean;
 }) {
-  const { viewingConversation, replaceMessageAndGenerate, config } =
-    useAppContext();
+  const { viewingChat, config } = useAppContext();
   const [editingContent, setEditingContent] = useState<string | null>(null);
   const timings = useMemo(
     () =>
@@ -37,6 +45,8 @@ export default function ChatMessage({
         : null,
     [msg.timings]
   );
+  const nextSibling = siblingLeafNodeIds[siblingCurrIdx + 1];
+  const prevSibling = siblingLeafNodeIds[siblingCurrIdx - 1];
 
   // for reasoning model, we split the message into content and thought
   // TODO: implement this as remark/rehype plugin in the future
@@ -64,13 +74,7 @@ export default function ChatMessage({
     return { content: actualContent, thought, isThinking };
   }, [msg]);
 
-  if (!viewingConversation) return null;
-
-  const regenerate = async () => {
-    replaceMessageAndGenerate(viewingConversation.id, msg.id, undefined, () =>
-      scrollToBottom(true)
-    );
-  };
+  if (!viewingChat) return null;
 
   return (
     <div className="group" id={id}>
@@ -105,13 +109,12 @@ export default function ChatMessage({
               </button>
               <button
                 className="btn mt-2"
-                onClick={() =>
-                  replaceMessageAndGenerate(
-                    viewingConversation.id,
-                    msg.id,
-                    editingContent
-                  )
-                }
+                onClick={() => {
+                  if (msg.content !== null) {
+                    setEditingContent(null);
+                    onEditMessage(msg as Message, editingContent);
+                  }
+                }}
               >
                 Submit
               </button>
@@ -196,10 +199,35 @@ export default function ChatMessage({
       {msg.content !== null && (
         <div
           className={classNames({
-            'mx-4 mt-2 mb-2': true,
-            'text-right': msg.role === 'user',
+            'flex items-center gap-2 mx-4 mt-2 mb-2': true,
+            'flex-row-reverse': msg.role === 'user',
           })}
         >
+          {siblingLeafNodeIds && siblingLeafNodeIds.length > 1 && (
+            <div className="flex gap-1 items-center opacity-60 text-sm">
+              <button
+                className={classNames({
+                  'btn btn-sm btn-ghost p-1': true,
+                  'opacity-20': !prevSibling,
+                })}
+                onClick={() => prevSibling && onChangeSibling(prevSibling)}
+              >
+                <ChevronLeftIcon className="h-4 w-4" />
+              </button>
+              <span>
+                {siblingCurrIdx + 1} / {siblingLeafNodeIds.length}
+              </span>
+              <button
+                className={classNames({
+                  'btn btn-sm btn-ghost p-1': true,
+                  'opacity-20': !nextSibling,
+                })}
+                onClick={() => nextSibling && onChangeSibling(nextSibling)}
+              >
+                <ChevronRightIcon className="h-4 w-4" />
+              </button>
+            </div>
+          )}
           {/* user message */}
           {msg.role === 'user' && (
             <button
@@ -216,7 +244,11 @@ export default function ChatMessage({
               {!isPending && (
                 <button
                   className="badge btn-mini show-on-hover mr-2"
-                  onClick={regenerate}
+                  onClick={() => {
+                    if (msg.content !== null) {
+                      onRegenerateMessage(msg as Message);
+                    }
+                  }}
                   disabled={msg.content === null}
                 >
                   🔄 Regenerate