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Connect chat to llm

This commit is contained in:
Pabloader 2026-03-21 17:28:41 +00:00
parent 1973b4dc83
commit f4144b70c7
5 changed files with 192 additions and 60 deletions
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17
src/games/storywriter/assets/chat-sidebar.module.css
View File

@ -57,6 +57,23 @@
word-wrap: break-word;
}
.loading {
color: var(--text-muted);
font-style: italic;
}
.errorMessage {
background: rgba(244, 67, 54, 0.1);
border-left: 2px solid var(--error, #f44336);
}
.errorText {
font-size: 13px;
color: var(--error, #f44336);
white-space: pre-wrap;
word-wrap: break-word;
}
.inputContainer {
display: flex;
flex-direction: column;

108
src/games/storywriter/components/chat-sidebar.tsx
View File

@ -2,11 +2,19 @@ import { Sidebar } from "./sidebar";
import { useAppState } from "../contexts/state";
import styles from '../assets/chat-sidebar.module.css';
import { useState, useRef, useEffect } from "preact/hooks";
import LLM from "../utils/llm";
import { highlight } from "../utils/highlight";
import Prompt from "../utils/prompt";
import clsx from "clsx";
export const ChatSidebar = () => {
const { currentStory, dispatch } = useAppState();
const appState = useAppState();
const { currentStory, dispatch, connection, model } = appState;
const [input, setInput] = useState('');
const [isLoading, setIsLoading] = useState(false);
const [error, setError] = useState<string | null>(null);
const messagesRef = useRef<HTMLDivElement>(null);
const abortControllerRef = useRef<AbortController | null>(null);
useEffect(() => {
if (messagesRef.current) {
@ -17,29 +25,81 @@ export const ChatSidebar = () => {
}
}, [currentStory?.chatMessages.length]);
const sendMessage = () => {
if (!currentStory || !input.trim()) return;
useEffect(() => {
return () => {
abortControllerRef.current?.abort();
};
}, []);
const sendMessage = async () => {
if (!currentStory || !input.trim() || !connection || !model || isLoading) return;
const userMessage = {
id: crypto.randomUUID(),
role: 'user' as const,
content: input.trim(),
};
dispatch({
type: 'ADD_CHAT_MESSAGE',
storyId: currentStory.id,
message: {
id: crypto.randomUUID(),
role: 'user',
content: input.trim(),
},
message: userMessage,
});
const assistantMessageId = crypto.randomUUID();
dispatch({
type: 'ADD_CHAT_MESSAGE',
storyId: currentStory.id,
message: {
id: crypto.randomUUID(),
id: assistantMessageId,
role: 'assistant',
content: 'Assistant message goes here...',
content: 'Generating...',
},
});
setInput('');
setIsLoading(true);
setError(null);
const request = Prompt.compilePrompt(appState, userMessage);
if (!request) {
setError('Failed to compile prompt');
setIsLoading(false);
return;
}
try {
let accumulatedContent = '';
for await (const chunk of LLM.generateStream(connection, request)) {
const delta = chunk.choices[0]?.delta?.content;
if (delta) {
accumulatedContent += delta;
dispatch({
type: 'ADD_CHAT_MESSAGE',
storyId: currentStory.id,
message: {
id: assistantMessageId,
role: 'assistant',
content: accumulatedContent,
},
});
}
if (abortControllerRef.current?.signal.aborted) {
break;
}
}
} catch (err) {
const errorMessage = err instanceof Error
? err.message
: 'Failed to generate response';
setError(errorMessage);
} finally {
setIsLoading(false);
abortControllerRef.current = null;
}
};
const handleKeyDown = (e: KeyboardEvent) => {
@ -57,6 +117,8 @@ export const ChatSidebar = () => {
});
};
const isDisabled = !currentStory || !connection || !model || isLoading;
return (
<Sidebar side="right">
<div class={styles.chat}>
@ -64,6 +126,10 @@ export const ChatSidebar = () => {
<div class={styles.placeholder}>
Select a story to start chatting
</div>
) : !connection || !model ? (
<div class={styles.placeholder}>
{!connection ? 'Connect to an LLM server' : 'Select a model'} to start chatting
</div>
) : currentStory.chatMessages.length === 0 ? (
<div class={styles.placeholder}>
No messages yet
@ -73,9 +139,18 @@ export const ChatSidebar = () => {
{currentStory.chatMessages.map((message) => (
<div key={message.id} class={styles.message} data-role={message.role}>
<div class={styles.role}>{message.role}</div>
<div class={styles.content}>{message.content}</div>
<div
class={styles.content}
dangerouslySetInnerHTML={{ __html: highlight(message.content) }}
/>
</div>
))}
{error && (
<div class={clsx(styles.message, styles.errorMessage)} data-role="assistant">
<div class={styles.role}>error</div>
<div class={styles.errorText}>{error}</div>
</div>
)}
<button class={styles.clearButton} onClick={handleClear}>
Clear chat
</button>
@ -88,11 +163,16 @@ export const ChatSidebar = () => {
value={input}
onInput={(e) => setInput((e.target as HTMLTextAreaElement).value)}
onKeyDown={handleKeyDown}
placeholder="Type a message..."
placeholder={isDisabled ? 'Connect to an LLM server to chat' : 'Type a message...'}
rows={3}
disabled={isDisabled}
/>
<button class={styles.sendButton} onClick={sendMessage}>
Send
<button
class={styles.sendButton}
onClick={sendMessage}
disabled={isDisabled || !input.trim()}
>
{isLoading ? 'Sending...' : 'Send'}
</button>
</div>
)}

21
src/games/storywriter/contexts/state.tsx
View File

@ -101,9 +101,18 @@ function reducer(state: IState, action: Action): IState {
case 'ADD_CHAT_MESSAGE': {
return {
...state,
stories: state.stories.map(s =>
s.id === action.storyId ? { ...s, chatMessages: [...s.chatMessages, action.message] } : s
),
stories: state.stories.map(s => {
if (s.id !== action.storyId) return s;
const existingIndex = s.chatMessages.findIndex(m => m.id === action.message.id);
if (existingIndex !== -1) {
// Overwrite existing message with same id
const updatedMessages = [...s.chatMessages];
updatedMessages[existingIndex] = action.message;
return { ...s, chatMessages: updatedMessages };
}
// Append new message
return { ...s, chatMessages: [...s.chatMessages, action.message] };
}),
};
}
case 'CLEAR_CHAT': {
@ -131,7 +140,7 @@ function reducer(state: IState, action: Action): IState {
// ─── Context ─────────────────────────────────────────────────────────────────
interface IStateContext {
export interface AppState {
stories: Story[];
currentStory: Story | null;
connection: LLM.Connection | null;
@ -139,7 +148,7 @@ interface IStateContext {
dispatch: (action: Action) => void;
}
const StateContext = createContext<IStateContext>({} as IStateContext);
const StateContext = createContext<AppState>({} as AppState);
export const useAppState = () => useContext(StateContext);
@ -148,7 +157,7 @@ export const useAppState = () => useContext(StateContext);
export const StateContextProvider = ({ children }: { children?: any }) => {
const [state, dispatch] = useStoredReducer('storywriter.state', reducer, DEFAULT_STATE);
const value = useMemo<IStateContext>(() => ({
const value = useMemo<AppState>(() => ({
stories: state.stories,
currentStory: state.stories.find(s => s.id === state.currentStoryId) ?? null,
connection: state.connection,

74
src/games/storywriter/utils/llm.ts
View File

@ -1,4 +1,5 @@
import { formatError } from '@common/errors';
import Lock from '@common/lock';
import SSE, { type SSEEvent } from '@common/sse';
namespace LLM {
@ -116,56 +117,51 @@ namespace LLM {
payload: body ? JSON.stringify(body) : undefined,
});
while (true) {
const event = await new Promise<{ data: string } | null>((resolve, reject) => {
const onMessage = (e: SSEEvent) => {
cleanup();
const readable = new ReadableStream<string>({
start: async (controller) => {
sse.addEventListener('message', (e) => {
if (isMessageEvent(e)) {
resolve(e);
if (e.data === '[DONE]') {
controller.close();
} else {
resolve(null);
controller.enqueue(e.data);
}
};
const onError = (e: SSEEvent) => {
cleanup();
reject(new Error(formatError(e, 'SSE connection error')));
};
const onAbort = () => {
cleanup();
resolve(null);
};
const onReadyStateChange = (e: SSEEvent) => {
if (e != null && typeof e === 'object' && 'readyState' in e && e.readyState === SSE.CLOSED) {
cleanup();
resolve(null);
}
};
const cleanup = () => {
sse.removeEventListener('message', onMessage);
sse.removeEventListener('error', onError);
sse.removeEventListener('abort', onAbort);
sse.removeEventListener('readystatechange', onReadyStateChange);
};
sse.addEventListener('message', onMessage);
sse.addEventListener('error', onError);
sse.addEventListener('abort', onAbort);
sse.addEventListener('readystatechange', onReadyStateChange);
});
if (!event || event.data === '[DONE]') {
let closed = false;
const handleEnd = (e?: unknown) => {
if (closed) return;
closed = true;
controller.close();
console.log(formatError(e));
};
sse.addEventListener('error', handleEnd);
sse.addEventListener('abort', handleEnd);
sse.addEventListener('readystatechange', (e) => {
if (e.readyState === SSE.CLOSED) handleEnd();
});
}
});
const reader = readable.getReader();
while (true) {
const { value, done } = await reader.read();
if (done) {
break;
}
if (event.data) {
try {
yield JSON.parse(event.data);
} catch (err) {
console.error('Failed to parse SSE data:', event.data, err);
}
yield JSON.parse(value);
} catch {
break;
}
}
await reader.closed;
sse.close();
}
function isMessageEvent(e: unknown): e is { data: string } {

30
src/games/storywriter/utils/prompt.ts Normal file
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@ -0,0 +1,30 @@
import LLM from "./llm";
import type { AppState } from "../contexts/state";
namespace Prompt {
export function compilePrompt(state: AppState, newMessage?: LLM.ChatMessage): LLM.ChatCompletionRequest | null {
const { currentStory, model } = state;
if (!currentStory || !model) {
return null;
}
const messages: LLM.ChatMessage[] = [
// TODO system prompt
// TODO part of story
...currentStory.chatMessages,
];
if (newMessage) {
messages.push(newMessage);
}
return {
model,
messages,
// TODO banned_tokens
};
}
}
export default Prompt;