feat: add public chat frontend

surfsense_web/hooks/use-public-chat-runtime.ts

@@ -0,0 +1,53 @@
+"use client";
+
+import {
+	type AppendMessage,
+	type ThreadMessageLike,
+	useExternalStoreRuntime,
+} from "@assistant-ui/react";
+import { useCallback, useMemo } from "react";
+import type { GetPublicChatResponse, PublicChatMessage } from "@/contracts/types/public-chat.types";
+
+interface UsePublicChatRuntimeOptions {
+	data: GetPublicChatResponse | undefined;
+}
+
+/**
+ * Creates a read-only runtime for public chat viewing.
+ */
+export function usePublicChatRuntime({ data }: UsePublicChatRuntimeOptions) {
+	const messages = useMemo(() => data?.messages ?? [], [data?.messages]);
+
+	// No-op - public chat is read-only
+	const onNew = useCallback(async (_message: AppendMessage) => {}, []);
+
+	// Convert PublicChatMessage to ThreadMessageLike
+	const convertMessage = useCallback(
+		(msg: PublicChatMessage, idx: number): ThreadMessageLike => ({
+			id: `public-msg-${idx}`,
+			role: msg.role as "user" | "assistant",
+			content: msg.content as ThreadMessageLike["content"],
+			createdAt: new Date(msg.created_at),
+			metadata: msg.author
+				? {
+						custom: {
+							author: {
+								displayName: msg.author.display_name,
+								avatarUrl: msg.author.avatar_url,
+							},
+						},
+					}
+				: undefined,
+		}),
+		[]
+	);
+
+	const runtime = useExternalStoreRuntime({
+		isRunning: false,
+		messages,
+		onNew,
+		convertMessage,
+	});
+
+	return runtime;
+}

surfsense_web/hooks/use-public-chat.ts

@@ -0,0 +1,14 @@
+import { useQuery } from "@tanstack/react-query";
+import type { GetPublicChatResponse } from "@/contracts/types/public-chat.types";
+import { publicChatApiService } from "@/lib/apis/public-chat-api.service";
+import { cacheKeys } from "@/lib/query-client/cache-keys";
+
+export function usePublicChat(shareToken: string) {
+	return useQuery<GetPublicChatResponse, Error>({
+		queryKey: cacheKeys.publicChat.byToken(shareToken),
+		queryFn: () => publicChatApiService.getPublicChat({ share_token: shareToken }),
+		enabled: !!shareToken,
+		staleTime: 30_000,
+		retry: false,
+	});
+}