add chat system

Overlord-Server/src/server/routes/chat-routes.ts

@@ -0,0 +1,43 @@
+import { authenticateRequest } from "../../auth";
+import { getConfig } from "../../config";
+import { getChatHistory, getOnlineClientCountForUser } from "../../db";
+import { hasPermission } from "../../users";
+
+export async function handleChatRoutes(
+  req: Request,
+  url: URL,
+): Promise<Response | null> {
+  if (req.method === "GET" && url.pathname === "/api/chat/history") {
+    const user = await authenticateRequest(req);
+    if (!user) {
+      return new Response(JSON.stringify({ error: "Not authenticated" }), {
+        status: 401,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    const beforeParam = url.searchParams.get("before");
+    const limitParam = url.searchParams.get("limit");
+    const before = beforeParam ? Number(beforeParam) : undefined;
+    const limit = limitParam ? Number(limitParam) : 50;
+
+    if (before !== undefined && (isNaN(before) || before <= 0)) {
+      return Response.json({ error: "Invalid 'before' parameter" }, { status: 400 });
+    }
+    if (isNaN(limit) || limit < 1 || limit > 200) {
+      return Response.json({ error: "Invalid 'limit' parameter (1-200)" }, { status: 400 });
+    }
+
+    const retDays = getConfig().chat?.retentionDays ?? 30;
+    const retMs = retDays > 0 ? retDays * 24 * 60 * 60 * 1000 : undefined;
+    const messages = getChatHistory(before, limit, retMs);
+    const enriched = messages.map((m) => ({
+      ...m,
+      onlineClients: m.userId ? getOnlineClientCountForUser(m.userId) : 0,
+    }));
+    const canWrite = hasPermission(user.role, "chat:write", user.userId);
+    return Response.json({ messages: enriched, canWrite });
+  }
+
+  return null;
+}