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- real time messaging 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{ Hono } from \"npm:hono@4\";\nimport { getCookie, setCookie, deleteCookie } from \"npm:hono/cookie\";\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport { serveFile, parseVal } from \"https://esm.town/v/std/utils/index.ts\";\nimport { runMigrations } from \"./database/migrations.ts\";\nimport {\n createUser, getUserByUsername, getUserByEmail, getUserById,\n createSession, getSession, deleteSession,\n createApiToken, getApiToken, deleteApiToken,\n createRoom, getRoomById, getRoomsForUser, getAllRooms, getRoomMembers,\n addRoomMember, removeRoomMember, isRoomMember, inviteToRoom,\n deleteRoom,\n createMessage, getMessages, editMessage, searchMessages, getMessageById, deleteMessage, clearRoom,\n addReaction, removeReaction, getReactionsForRoom,\n setTyping, clearTyping, getTyping,\n blockUser, unblockUser, getBlockedUsers,\n queueMention, getPublicUsers, getAllUsers,\n setGhostMode, banUser, unbanUser, muteUser, unmuteUser,\n updateUserAvatar, updateUserPassword, deleteUser,\n} from \"./database/queries.ts\";\nimport { hashPassword, verifyPassword, generateToken } from \"./shared/auth.ts\";\nimport { sendEmail, mentionEmailHtml, recoveryEmailHtml } from \"./shared/email.ts\";\nimport { ADMIN_USERNAME, ADMIN_PASSWORD, MAX_FILE_SIZE, MAX_AVATAR_SIZE, MISTRAL_API_KEY, CODESTRAL_API_KEY, GROQ_API_KEY, GROQ_ADMIN_MODEL } from \"./shared/types.ts\";\n\nawait runMigrations();\n\n// Ensure admin account exists\nconst adminExists = await getUserByUsername(ADMIN_USERNAME);\nif (!adminExists) {\n const hash = await hashPassword(ADMIN_PASSWORD);\n await createUser(ADMIN_USERNAME, \"admin@huddle.local\", hash, ADMIN_PASSWORD);\n}\n\nconst app = new Hono();\napp.onError((err) => Promise.reject(err));\n\n// ─── Auth helper ──────────────────────────────────────────────────────────────\nasync function getSessionUser(c: any) {\n // Try cookie session\n const sid = getCookie(c, \"hid\");\n if (sid) {\n const session = await getSession(sid);\n if (session) {\n const user = await getUserById(Number(session.user_id));\n if (user) return await checkExpiry(user);\n }\n }\n // Try Authorization Bearer token (for bookmarklet cross-origin)\n const auth = c.req.header(\"Authorization\");\n if (auth?.startsWith(\"Bearer \")) {\n const token = auth.slice(7);\n const rec = await getApiToken(token);\n if (rec) {\n const user = await getUserById(Number(rec.user_id));\n if (user) return await checkExpiry(user);\n }\n }\n return null;\n}\n\nasync function checkExpiry(user: any) {\n if (user.is_banned && user.ban_expires_at && new Date(user.ban_expires_at as string) < new Date()) {\n await unbanUser(Number(user.id));\n user.is_banned = 0;\n }\n if (user.is_muted && user.mute_expires_at && new Date(user.mute_expires_at as string) < new Date()) {\n await unmuteUser(Number(user.id));\n user.is_muted = 0;\n }\n // Enforce active bans on live sessions — return null to force logout\n if (user.is_banned) {\n const isPerm = !user.ban_expires_at;\n const isActive = isPerm || new Date(user.ban_expires_at as string) > new Date();\n if (isActive) return null;\n }\n return user;\n}\n\nfunction isAdmin(user: any) {\n return user && user.username.toLowerCase() === ADMIN_USERNAME.toLowerCase();\n}\n\nfunction userPayload(user: any) {\n return {\n id: Number(user.id),\n username: user.username,\n email: user.email,\n isAdmin: isAdmin(user),\n ghost_mode: user.ghost_mode,\n avatar_blob_key: user.avatar_blob_key,\n };\n}\n\n// ─── CORS middleware for bookmarklet ─────────────────────────────────────────\nconst CORS_HEADERS = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET,POST,PUT,PATCH,DELETE,OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type,Authorization\",\n \"Access-Control-Max-Age\": \"86400\",\n};\n\n// Handle preflight FIRST, before any other middleware\napp.options(\"*\", (c) => new Response(null, { status: 204, headers: CORS_HEADERS }));\n\n// Inject CORS headers into every response\napp.use(\"*\", async (c, next) => {\n await next();\n for (const [k, v] of Object.entries(CORS_HEADERS)) {\n c.res.headers.set(k, v);\n }\n});\n\n// ─── Static files ─────────────────────────────────────────────────────────────\napp.get(\"/\", (c) => serveFile(\"/frontend/index.html\", import.meta.url));\napp.get(\"/bookmarklet\", (c) => serveFile(\"/frontend/bookmarklet.html\", import.meta.url));\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// ─── Auth routes ──────────────────────────────────────────────────────────────\napp.post(\"/api/signup\", async (c) => {\n const { username, email, password } = await c.req.json();\n if (!username || !email || !password) return c.json({ error: \"All fields required\" }, 400);\n if (password.length < 6) return c.json({ error: \"Password must be at least 6 characters\" }, 400);\n if (!/^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$/.test(email)) return c.json({ error: \"Invalid email address\" }, 400);\n if (!/^[a-zA-Z0-9_]{3,20}$/.test(username)) return c.json({ error: \"Username: 3–20 chars, letters/numbers/_ only\" }, 400);\n\n const existingUser = await getUserByUsername(username);\n if (existingUser) return c.json({ error: \"Username already taken\" }, 409);\n const existingEmail = await getUserByEmail(email);\n if (existingEmail) return c.json({ error: \"Email already registered\" }, 409);\n\n const hash = await hashPassword(password);\n const userId = await createUser(username, email, hash, password);\n const sid = generateToken();\n await createSession(sid, Number(userId));\n // Also create API token for bookmarklet cross-origin use\n const apiToken = generateToken();\n await createApiToken(apiToken, Number(userId));\n setCookie(c, \"hid\", sid, { httpOnly: true, sameSite: \"Lax\", maxAge: 60 * 60 * 24 * 30 });\n return c.json({ ok: true, apiToken, user: { id: Number(userId), username, email, isAdmin: isAdmin({ username }) } });\n});\n\napp.post(\"/api/login\", async (c) => {\n const { username, password } = await c.req.json();\n if (!username || !password) return c.json({ error: \"Username and password required\" }, 400);\n const user = await getUserByUsername(username);\n if (!user) return c.json({ error: \"Invalid credentials\" }, 401);\n if (user.is_banned) {\n const isPerm = !user.ban_expires_at;\n const isActive = isPerm || new Date(user.ban_expires_at as string) > new Date();\n if (isActive) {\n const msg = user.ban_message ? `\\n\\n${user.ban_message}` : \"\";\n const exp = isPerm ? \" permanently\" : ` until ${new Date(user.ban_expires_at as string).toLocaleString()}`;\n return c.json({ error: `Your account has been banned${exp}.${msg}` }, 403);\n }\n }\n const ok = await verifyPassword(password as string, user.password_hash as string);\n if (!ok) return c.json({ error: \"Invalid credentials\" }, 401);\n const sid = generateToken();\n await createSession(sid, Number(user.id));\n // Issue fresh API token\n const apiToken = generateToken();\n await createApiToken(apiToken, Number(user.id));\n setCookie(c, \"hid\", sid, { httpOnly: true, sameSite: \"Lax\", maxAge: 60 * 60 * 24 * 30 });\n return c.json({ ok: true, apiToken, user: userPayload(user) });\n});\n\napp.post(\"/api/logout\", async (c) => {\n const sid = getCookie(c, \"hid\");\n if (sid) await deleteSession(sid);\n // Delete API token if provided\n const auth = c.req.header(\"Authorization\");\n if (auth?.startsWith(\"Bearer \")) await deleteApiToken(auth.slice(7));\n deleteCookie(c, \"hid\");\n return c.json({ ok: true });\n});\n\napp.get(\"/api/me\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n return c.json({ user: userPayload(user) });\n});\n\n// ─── Password recovery (sends actual password) ────────────────────────────────\napp.post(\"/api/recover\", async (c) => {\n const { identifier } = await c.req.json();\n if (!identifier) return c.json({ error: \"Email or username required\" }, 400);\n const user = identifier.includes(\"@\") ? await getUserByEmail(identifier) : await getUserByUsername(identifier);\n if (!user) return c.json({ ok: true }); // don't reveal existence\n const plain = user.password_plain as string | null;\n if (!plain) {\n // No stored plain password — can't recover, send info\n await sendEmail(user.email as string, \"Huddle – Password Recovery\", recoveryEmailHtml(\"[Password recovery not available — please contact admin]\"));\n } else {\n await sendEmail(user.email as string, \"Huddle – Password Recovery\", recoveryEmailHtml(plain));\n }\n return c.json({ ok: true });\n});\n\n// ─── Users ────────────────────────────────────────────────────────────────────\napp.get(\"/api/users\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n if (isAdmin(user)) {\n const users = await getAllUsers();\n return c.json({ users });\n }\n const users = await getPublicUsers();\n return c.json({ users });\n});\n\n// ─── Delete account (self or admin) ──────────────────────────────────────────\napp.delete(\"/api/users/:id\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const targetId = Number(c.req.param(\"id\"));\n // Only the account owner or an admin may delete\n if (Number(user.id) !== targetId && !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n // Admin cannot delete their own account through this route to prevent lockout\n const target = await getUserById(targetId);\n if (!target) return c.json({ error: \"User not found\" }, 404);\n if (isAdmin({ username: target.username })) return c.json({ error: \"Cannot delete admin account\" }, 403);\n try {\n await deleteUser(targetId);\n } catch (e: any) {\n console.error(\"deleteUser failed:\", e);\n return c.json({ error: e?.message ?? \"Failed to delete user\" }, 500);\n }\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/ghost\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const { ghost } = await c.req.json();\n await setGhostMode(Number(user.id), ghost);\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/:id/ban\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n const targetId = Number(c.req.param(\"id\"));\n const target = await getUserById(targetId);\n if (target && isAdmin({ username: target.username })) return c.json({ error: \"Cannot ban admin account\" }, 403);\n const { duration, message } = await c.req.json(); // duration in hours, null = permanent\n const expiresAt = duration ? new Date(Date.now() + duration * 3600000).toISOString() : null;\n await banUser(targetId, expiresAt, message ?? null);\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/:id/unban\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n await unbanUser(Number(c.req.param(\"id\")));\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/:id/mute\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n const targetId = Number(c.req.param(\"id\"));\n const target = await getUserById(targetId);\n if (target && isAdmin({ username: target.username })) return c.json({ error: \"Cannot mute admin account\" }, 403);\n const { duration } = await c.req.json(); // duration in minutes\n const expiresAt = new Date(Date.now() + (duration || 30) * 60000).toISOString();\n await muteUser(targetId, expiresAt);\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/:id/unmute\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n await unmuteUser(Number(c.req.param(\"id\")));\n return c.json({ ok: true });\n});\n\napp.get(\"/api/users/blocked\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const blocked = await getBlockedUsers(Number(user.id));\n return c.json({ blocked });\n});\n\napp.post(\"/api/users/:id/block\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const blockTargetId = Number(c.req.param(\"id\"));\n const blockTarget = await getUserById(blockTargetId);\n if (blockTarget && isAdmin({ username: blockTarget.username })) return c.json({ error: \"Cannot block admin\" }, 403);\n await blockUser(Number(user.id), blockTargetId);\n return c.json({ ok: true });\n});\n\napp.post(\"/api/users/:id/unblock\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n await unblockUser(Number(user.id), Number(c.req.param(\"id\")));\n return c.json({ ok: true });\n});\n\n// ─── Avatar upload ────────────────────────────────────────────────────────────\napp.post(\"/api/avatar\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const formData = await c.req.formData();\n const file = formData.get(\"avatar\") as File | null;\n if (!file) return c.json({ error: \"No file\" }, 400);\n if (file.size > MAX_AVATAR_SIZE) return c.json({ error: \"Avatar max size is 100 KB\" }, 400);\n const key = `huddle_avatar_${user.id}_${Date.now()}`;\n const buf = await file.arrayBuffer();\n await blob.set(key, buf);\n // Avatar blobs are permanent — only chat file blobs expire after 12h\n await updateUserAvatar(Number(user.id), key);\n return c.json({ ok: true, key });\n});\n\napp.get(\"/api/blob/:key\", async (c) => {\n const key = c.req.param(\"key\");\n // Avatar blobs are public (no sensitive data). All other blobs require auth.\n const isAvatar = key.startsWith(\"huddle_avatar_\");\n if (!isAvatar) {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n }\n\n // blob.get() returns a Response; throws ValTownBlobNotFoundError if missing\n let buf: ArrayBuffer;\n try {\n const resp = await blob.get(key);\n buf = await resp.arrayBuffer();\n } catch {\n return c.json({ error: \"File not found or has expired\" }, 404);\n }\n\n // Detect MIME from the key — the file upload key ends with the original filename\n // e.g. huddle_file_1_2_1234567890_photo.jpg → image/jpeg\n const lk = key.toLowerCase();\n const mimeMap: Record = {\n \".jpg\": \"image/jpeg\", \".jpeg\": \"image/jpeg\", \".png\": \"image/png\",\n \".gif\": \"image/gif\", \".webp\": \"image/webp\", \".svg\": \"image/svg+xml\",\n \".pdf\": \"application/pdf\", \".txt\": \"text/plain; charset=utf-8\",\n \".md\": \"text/plain; charset=utf-8\", \".csv\": \"text/csv; charset=utf-8\",\n \".mp4\": \"video/mp4\", \".mp3\": \"audio/mpeg\", \".wav\": \"audio/wav\",\n \".zip\": \"application/zip\", \".json\": \"application/json\",\n \".html\": \"text/html; charset=utf-8\", \".htm\": \"text/html; charset=utf-8\",\n \".js\": \"text/javascript\", \".ts\": \"text/plain; charset=utf-8\", \".css\": \"text/css\",\n \".docx\": \"application/vnd.openxmlformats-officedocument.wordprocessingml.document\",\n \".xlsx\": \"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\",\n };\n let ct = \"application/octet-stream\";\n for (const [ext, mime] of Object.entries(mimeMap)) {\n if (lk.endsWith(ext)) { ct = mime; break; }\n }\n\n // For avatars (key has no extension), sniff MIME from magic bytes\n if (ct === \"application/octet-stream\") {\n const bytes = new Uint8Array(buf).subarray(0, 4);\n if (bytes[0] === 0xFF && bytes[1] === 0xD8) ct = \"image/jpeg\";\n else if (bytes[0] === 0x89 && bytes[1] === 0x50) ct = \"image/png\";\n else if (bytes[0] === 0x47 && bytes[1] === 0x49) ct = \"image/gif\";\n else if (bytes[0] === 0x52 && bytes[1] === 0x49) ct = \"image/webp\";\n }\n\n return new Response(buf, {\n headers: {\n \"Content-Type\": ct,\n \"Cache-Control\": isAvatar ? \"public, max-age=86400\" : \"private, max-age=3600\",\n \"Access-Control-Allow-Origin\": \"*\",\n },\n });\n});\n\n// ─── Rooms ────────────────────────────────────────────────────────────────────\napp.get(\"/api/rooms\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const rooms = isAdmin(user) ? await getAllRooms() : await getRoomsForUser(Number(user.id));\n return c.json({ rooms });\n});\n\napp.post(\"/api/rooms\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const { name } = await c.req.json();\n if (!name?.trim()) return c.json({ error: \"Room name required\" }, 400);\n const roomId = await createRoom(name.trim(), Number(user.id));\n return c.json({ ok: true, roomId });\n});\n\napp.delete(\"/api/rooms/:id\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type === \"world\") return c.json({ error: \"Cannot delete World Chat\" }, 403);\n if (!isAdmin(user) && Number(room.created_by) !== Number(user.id)) return c.json({ error: \"Only the creator can delete this room\" }, 403);\n await deleteRoom(roomId);\n return c.json({ ok: true });\n});\n\napp.get(\"/api/rooms/:id/members\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const members = await getRoomMembers(roomId);\n return c.json({ members });\n});\n\napp.post(\"/api/rooms/:id/invite\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const { username } = await c.req.json();\n if (!username) return c.json({ error: \"Username required\" }, 400);\n // Only owner or admin can invite\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (!isAdmin(user) && Number(room.created_by) !== Number(user.id)) {\n const members = await getRoomMembers(roomId);\n const caller = members.find((m: any) => Number(m.id) === Number(user.id));\n if (!caller || caller.role !== \"owner\") return c.json({ error: \"Only the room owner can invite\" }, 403);\n }\n const target = await getUserByUsername(username);\n if (!target) return c.json({ error: \"User not found\" }, 404);\n await inviteToRoom(roomId, Number(target.id), Number(user.id));\n return c.json({ ok: true });\n});\n\napp.post(\"/api/rooms/:id/kick\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const { userId } = await c.req.json();\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (!isAdmin(user) && Number(room.created_by) !== Number(user.id)) {\n const members = await getRoomMembers(roomId);\n const caller = members.find((m: any) => Number(m.id) === Number(user.id));\n if (!caller || caller.role !== \"owner\") return c.json({ error: \"Forbidden\" }, 403);\n }\n // Prevent kicking admin from rooms\n const kickTarget = await getUserById(Number(userId));\n if (kickTarget && isAdmin({ username: kickTarget.username })) return c.json({ error: \"Cannot kick admin\" }, 403);\n await removeRoomMember(roomId, Number(userId));\n return c.json({ ok: true });\n});\n\napp.post(\"/api/rooms/:id/leave\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n await removeRoomMember(roomId, Number(user.id));\n return c.json({ ok: true });\n});\n\n// ─── Messages ─────────────────────────────────────────────────────────────────\napp.get(\"/api/rooms/:id/messages\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const since = c.req.query(\"since\") ? Number(c.req.query(\"since\")) : undefined;\n const msgs = await getMessages(roomId, since);\n const blocked = await getBlockedUsers(Number(user.id));\n const filtered = isAdmin(user) ? msgs : msgs.filter((m: any) => !blocked.includes(Number(m.user_id)));\n // Attach reactions if loading full history (no since param)\n let reactions: any[] = [];\n if (!since) reactions = await getReactionsForRoom(roomId);\n return c.json({ messages: filtered, reactions });\n});\n\n// Long polling endpoint\napp.get(\"/api/rooms/:id/poll\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const since = Number(c.req.query(\"since\") ?? 0);\n const blocked = await getBlockedUsers(Number(user.id));\n const deadline = Date.now() + 25000;\n let lastTyping: string[] = [];\n while (Date.now() < deadline) {\n const msgs = await getMessages(roomId, since);\n const typing = await getTyping(roomId);\n const typingOthers = typing.filter((u: string) => u !== (user.username as string));\n if (msgs.length > 0) {\n const filtered = isAdmin(user) ? msgs : msgs.filter((m: any) => !blocked.includes(Number(m.user_id)));\n return c.json({ messages: filtered, typing: typingOthers });\n }\n // Return typing changes without breaking the long-poll into a tight loop:\n // only return early if typing state actually changed since last check.\n const typingKey = [...typingOthers].sort().join(\",\");\n const lastKey = [...lastTyping].sort().join(\",\");\n if (typingKey !== lastKey) {\n lastTyping = typingOthers;\n return c.json({ messages: [], typing: typingOthers });\n }\n await new Promise((r) => setTimeout(r, 1000));\n }\n return c.json({ messages: [], typing: lastTyping });\n});\n\napp.post(\"/api/rooms/:id/messages\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n if (user.is_muted && user.mute_expires_at && new Date(user.mute_expires_at as string) > new Date()) {\n return c.json({ error: \"You are currently muted\" }, 403);\n }\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const { content, reply_to_id } = await c.req.json();\n if (!content?.trim()) return c.json({ error: \"Message cannot be empty\" }, 400);\n if (content.length > 2000) return c.json({ error: \"Message too long (max 2000 chars)\" }, 400);\n const msgId = await createMessage(roomId, Number(user.id), content.trim(), undefined, undefined, undefined, reply_to_id ? Number(reply_to_id) : undefined);\n // Parse @mentions\n const mentionRegex = /@([a-zA-Z0-9_]+)/g;\n let match;\n while ((match = mentionRegex.exec(content)) !== null) {\n const mentioned = await getUserByUsername(match[1]);\n if (mentioned && Number(mentioned.id) !== Number(user.id)) {\n await queueMention(Number(mentioned.id), user.username as string, room.name as string);\n }\n }\n // Return the created message so the client can do an instant silent swap\n // of the optimistic bubble — no poll-loop blink needed.\n const createdMsg = await getMessageById(Number(msgId));\n return c.json({ ok: true, message: createdMsg ? { ...createdMsg, id: Number((createdMsg as any).id) } : null });\n});\n\n// ─── File upload ──────────────────────────────────────────────────────────────\napp.post(\"/api/rooms/:id/upload\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n if (user.is_muted && user.mute_expires_at && new Date(user.mute_expires_at as string) > new Date()) {\n return c.json({ error: \"You are currently muted\" }, 403);\n }\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const formData = await c.req.formData();\n const file = formData.get(\"file\") as File | null;\n if (!file) return c.json({ error: \"No file\" }, 400);\n if (file.size > MAX_FILE_SIZE) return c.json({ error: \"File max size is 200 KB\" }, 400);\n const key = `huddle_file_${roomId}_${user.id}_${Date.now()}_${file.name}`;\n const buf = await file.arrayBuffer();\n await blob.set(key, buf);\n await createMessage(roomId, Number(user.id), null, key, file.name, file.size);\n return c.json({ ok: true });\n});\n\n// ─── Message edit ─────────────────────────────────────────────────────────────\napp.patch(\"/api/messages/:id\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const msgId = Number(c.req.param(\"id\"));\n const { content } = await c.req.json();\n if (!content?.trim()) return c.json({ error: \"Content required\" }, 400);\n if (content.length > 2000) return c.json({ error: \"Message too long\" }, 400);\n const msg = await getMessageById(msgId);\n if (!msg) return c.json({ error: \"Not found\" }, 404);\n if (Number(msg.user_id) !== Number(user.id) && !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n // 5 minute edit window for non-admins\n if (!isAdmin(user)) {\n const createdAt = new Date(msg.created_at as string).getTime();\n if (Date.now() - createdAt > 5 * 60 * 1000) return c.json({ error: \"Edit window expired (5 min)\" }, 403);\n }\n await editMessage(msgId, Number(user.id), content.trim());\n return c.json({ ok: true });\n});\n\n// ─── Message delete (admin or message owner, soft-deletes to [deleted]) ──────\napp.delete(\"/api/messages/:id\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const msgId = Number(c.req.param(\"id\"));\n const msg = await getMessageById(msgId);\n if (!msg) return c.json({ error: \"Not found\" }, 404);\n // Only admin or the original author can delete\n if (Number(msg.user_id) !== Number(user.id) && !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n await deleteMessage(msgId);\n return c.json({ ok: true });\n});\n\n// ─── Clear room (admin only) ──────────────────────────────────────────────────\napp.delete(\"/api/rooms/:id/messages\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n await clearRoom(roomId);\n return c.json({ ok: true });\n});\n\n// ─── Message search ───────────────────────────────────────────────────────────\napp.get(\"/api/rooms/:id/search\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const room = await getRoomById(roomId);\n if (!room) return c.json({ error: \"Room not found\" }, 404);\n if (room.type !== \"world\" && !isAdmin(user) && !(await isRoomMember(roomId, Number(user.id)))) {\n return c.json({ error: \"Forbidden\" }, 403);\n }\n const q = c.req.query(\"q\") ?? \"\";\n if (q.trim().length < 2) return c.json({ messages: [] });\n const msgs = await searchMessages(roomId, q.trim());\n return c.json({ messages: msgs });\n});\n\n// ─── Reactions ────────────────────────────────────────────────────────────────\napp.post(\"/api/messages/:id/react\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const msgId = Number(c.req.param(\"id\"));\n const { emoji } = await c.req.json();\n if (!emoji) return c.json({ error: \"Emoji required\" }, 400);\n const ALLOWED = [\"👍\",\"❤️\",\"😂\",\"😮\",\"😢\",\"🔥\",\"👀\",\"🎉\",\"💯\",\"🤔\"];\n if (!ALLOWED.includes(emoji)) return c.json({ error: \"Emoji not allowed\" }, 400);\n await addReaction(msgId, Number(user.id), emoji);\n return c.json({ ok: true });\n});\n\napp.delete(\"/api/messages/:id/react\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const msgId = Number(c.req.param(\"id\"));\n const { emoji } = await c.req.json();\n await removeReaction(msgId, Number(user.id), emoji);\n return c.json({ ok: true });\n});\n\n// ─── Typing indicators ────────────────────────────────────────────────────────\napp.post(\"/api/rooms/:id/typing\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const roomId = Number(c.req.param(\"id\"));\n const { typing } = await c.req.json();\n if (typing) {\n await setTyping(roomId, Number(user.id), user.username as string);\n } else {\n await clearTyping(roomId, Number(user.id));\n }\n return c.json({ ok: true });\n});\n\n// ─── Link preview ─────────────────────────────────────────────────────────────\napp.get(\"/api/link-preview\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const url = c.req.query(\"url\");\n if (!url) return c.json({ error: \"URL required\" }, 400);\n try {\n const resp = await fetch(url, {\n headers: { \"User-Agent\": \"Mozilla/5.0 (compatible; Huddle/1.0)\" },\n signal: AbortSignal.timeout(5000),\n });\n if (!resp.ok) return c.json({ error: \"Failed to fetch\" }, 502);\n const html = await resp.text();\n const getTag = (prop: string) => {\n const m = html.match(new RegExp(`]+(?:property|name)=[\"']${prop}[\"'][^>]+content=[\"']([^\"']+)[\"']`, \"i\"))\n || html.match(new RegExp(`]+content=[\"']([^\"']+)[\"'][^>]+(?:property|name)=[\"']${prop}[\"']`, \"i\"));\n return m?.[1] ?? null;\n };\n const titleMatch = html.match(/]*>([^<]+)<\\/title>/i);\n const title = getTag(\"og:title\") || getTag(\"twitter:title\") || titleMatch?.[1]?.trim() || null;\n const description = getTag(\"og:description\") || getTag(\"twitter:description\") || getTag(\"description\") || null;\n const image = getTag(\"og:image\") || getTag(\"twitter:image\") || null;\n const siteName = getTag(\"og:site_name\") || null;\n return c.json({ title, description, image, siteName, url });\n } catch {\n return c.json({ error: \"Could not fetch URL\" }, 502);\n }\n});\n\n// ─── AI Admin Chat (admin-only, full data access) ─────────────────────────────\napp.post(\"/api/ai/admin-chat\", async (c) => {\n const user = await getSessionUser(c);\n if (!user || !isAdmin(user)) return c.json({ error: \"Forbidden\" }, 403);\n\n const { messages } = await c.req.json();\n if (!messages?.length) return c.json({ error: \"Messages required\" }, 400);\n\n // Check last user message for action commands before calling AI\n const lastMsg: string = messages[messages.length - 1]?.content ?? \"\";\n\n // Helper: stream a result message as SSE\n const streamResult = (resultMsg: string) => {\n const encoder = new TextEncoder();\n const readable = new ReadableStream({\n start(controller) {\n controller.enqueue(encoder.encode(`data: ${JSON.stringify({ t: resultMsg })}\\n\\n`));\n controller.enqueue(encoder.encode(\"data: [DONE]\\n\\n\"));\n controller.close();\n },\n });\n return new Response(readable, {\n headers: { \"Content-Type\": \"text/event-stream\", \"Cache-Control\": \"no-cache\", ...CORS_HEADERS },\n });\n };\n\n // Detect \"delete msg ,,...\" — comma-separated message IDs\n const deleteMsgMatch = lastMsg.match(/^delete\\s+msg(?:s?|essages?)?\\s+([\\d,\\s]+)/i);\n if (deleteMsgMatch) {\n const ids = deleteMsgMatch[1].split(\",\").map((s: string) => Number(s.trim())).filter((n: number) => n > 0);\n const results: string[] = [];\n for (const msgId of ids) {\n const msg = await getMessageById(msgId);\n if (!msg) { results.push(`❌ Message #${msgId} not found.`); continue; }\n await deleteMessage(msgId);\n results.push(`✅ Message #${msgId} removed.`);\n }\n return streamResult(results.join(\"\\n\"));\n }\n\n // Detect \"clear room ,,...\" — comma-separated room IDs\n const clearRoomMatch = lastMsg.match(/^clear\\s+room\\s+([\\d,\\s]+)/i);\n if (clearRoomMatch) {\n const ids = clearRoomMatch[1].split(\",\").map((s: string) => Number(s.trim())).filter((n: number) => n > 0);\n const results: string[] = [];\n for (const roomId of ids) {\n const room = await getRoomById(roomId);\n if (!room) { results.push(`❌ Room #${roomId} not found.`); continue; }\n await clearRoom(roomId);\n results.push(`✅ All messages in **${(room as any).name}** (#${roomId}) cleared.`);\n }\n return streamResult(results.join(\"\\n\"));\n }\n\n // Detect ban/mute/unban/unmute with comma-separated @usernames\n // Formats: \"ban @user1,@user2 24\" | \"mute @user1,@user2 30\" | \"unban @user1,@user2\"\n const actionMatch = lastMsg.match(/^(ban|mute|unban|unmute)\\s+([@\\w,\\s]+?)(?:\\s+(\\d+))?$/i);\n if (actionMatch) {\n const cmd = actionMatch[1].toLowerCase();\n const duration = actionMatch[3] ? Number(actionMatch[3]) : null;\n // Parse comma-separated usernames, stripping leading @\n const usernames = actionMatch[2].split(\",\").map((s: string) => s.trim().replace(/^@/, \"\")).filter(Boolean);\n const results: string[] = [];\n for (const targetUsername of usernames) {\n const target = await getUserByUsername(targetUsername);\n if (!target) { results.push(`❌ @${targetUsername} not found.`); continue; }\n if (isAdmin({ username: target.username })) { results.push(`❌ Cannot moderate admin account.`); continue; }\n if (cmd === \"ban\") {\n const expiresAt = duration ? new Date(Date.now() + duration * 3600000).toISOString() : null;\n await banUser(Number(target.id), expiresAt, null);\n results.push(duration ? `✅ Banned @${targetUsername} for ${duration}h.` : `✅ Permanently banned @${targetUsername}.`);\n } else if (cmd === \"unban\") {\n await unbanUser(Number(target.id));\n results.push(`✅ Unbanned @${targetUsername}.`);\n } else if (cmd === \"mute\") {\n const mins = duration ?? 30;\n await muteUser(Number(target.id), new Date(Date.now() + mins * 60000).toISOString());\n results.push(`✅ Muted @${targetUsername} for ${mins} minutes.`);\n } else if (cmd === \"unmute\") {\n await unmuteUser(Number(target.id));\n results.push(`✅ Unmuted @${targetUsername}.`);\n }\n }\n return streamResult(results.join(\"\\n\"));\n }\n\n // Gather live context for the AI\n const allUsers = await getAllUsers();\n const allRooms = await getAllRooms();\n\n // Fetch last 100 messages from every room (capped per-room for token budget)\n let contextLines: string[] = [];\n // Exclude the moderator (@mjk) from the user list shown to AI — they are the admin, not a subject of moderation\n const nonModUsers = (allUsers as any[]).filter((u: any) => u.username.toLowerCase() !== ADMIN_USERNAME.toLowerCase());\n contextLines.push(`=== USERS (${nonModUsers.length}) ===`);\n for (const u of nonModUsers) {\n const banned = u.is_banned ? ` [BANNED${u.ban_expires_at ? \" until \" + u.ban_expires_at : \" PERM\"}]` : \"\";\n const muted = u.is_muted ? ` [MUTED until ${u.mute_expires_at}]` : \"\";\n contextLines.push(`@${u.username} (id:${u.id}, email:${u.email})${banned}${muted}`);\n }\n contextLines.push(`\\n=== ROOMS (${allRooms.length}) ===`);\n for (const room of allRooms as any[]) {\n contextLines.push(`[${room.id}] ${room.name} (${room.type})`);\n try {\n const msgs = await getMessages(Number(room.id), undefined);\n // Character-budget: take newest messages up to ~6000 chars of content per room\n // Exclude moderator messages and deleted-user messages from the AI context\n const all = (msgs as any[]).filter(\n (m: any) => !m.is_deleted && m.username?.toLowerCase() !== ADMIN_USERNAME.toLowerCase()\n );\n let charBudget = 6000;\n const recent: any[] = [];\n for (let i = all.length - 1; i >= 0 && charBudget > 0; i--) {\n const text = all[i].content || \"[file]\";\n charBudget -= text.length;\n recent.unshift(all[i]);\n }\n for (const m of recent) {\n contextLines.push(` [msg:${m.id}] ${m.username}: ${m.content || \"[file]\"}`);\n }\n } catch {}\n }\n const context = contextLines.join(\"\\n\").slice(0, 80000); // ~80k char budget for Llama 4 Scout\n\n const systemPrompt = `You are the Huddle Admin AI — an intelligent moderation assistant for @${ADMIN_USERNAME}, who is the platform moderator.\n\nKey facts:\n- @${ADMIN_USERNAME} is the MODERATOR/ADMIN of this platform. Do NOT report on @${ADMIN_USERNAME}'s actions or messages. Any actions taken by @${ADMIN_USERNAME} are moderation actions and are not shown here.\n- The data below contains ONLY regular user activity — not moderator activity.\n- Some users may have been removed (shown as [deleted] in chat) — this means the moderator deleted them for violations.\n\nYou can:\n- Summarize user activity or message patterns\n- Identify potentially malicious, spammy, or harmful behavior\n- Report on banned/muted users\n- Answer questions about any user or room\n- Explain what's happening in any private chat\n\nYou CANNOT directly execute moderation actions from inside this response — instruct the admin to type one of these commands as their next message and the system will execute it immediately.\nAll commands support comma-separated lists of targets for batch operations:\n- \"ban @user1,@user2 [hours]\" — ban one or more users (hours optional, omit for permanent)\n- \"mute @user1,@user2 [minutes]\" — mute one or more users\n- \"unban @user1,@user2\" — unban one or more users\n- \"unmute @user1,@user2\" — unmute one or more users\n- \"delete msg ,,...\" — soft-delete one or more messages (shows as [deleted] in chat)\n- \"clear room ,,...\" — permanently delete ALL messages in one or more rooms\n\nWhen recommending message deletion, always include the exact message ID from the data above so the admin can copy-paste the command.\n\n=== LIVE USER ACTIVITY ===\n${context}\n=== END DATA ===\n\nBe concise, analytical, and flag anything suspicious. When asked about a specific user, quote their recent messages as evidence.`;\n\n const resp = await fetch(\"https://api.groq.com/openai/v1/chat/completions\", {\n method: \"POST\",\n headers: { \"Authorization\": `Bearer ${GROQ_API_KEY}`, \"Content-Type\": \"application/json\" },\n body: JSON.stringify({\n model: GROQ_ADMIN_MODEL,\n messages: [{ role: \"system\", content: systemPrompt }, ...messages],\n max_tokens: 1024,\n stream: true,\n }),\n });\n\n if (!resp.ok) {\n const err = await resp.text();\n console.error(\"Admin AI error:\", err);\n return c.json({ error: \"AI service error\" }, 502);\n }\n\n const encoder2 = new TextEncoder();\n const readable2 = new ReadableStream({\n async start(controller) {\n const reader = resp.body!.getReader();\n const decoder = new TextDecoder();\n let buffer = \"\";\n try {\n while (true) {\n const { done, value } = await reader.read();\n if (done) break;\n buffer += decoder.decode(value, { stream: true });\n const lines = buffer.split(\"\\n\");\n buffer = lines.pop() || \"\";\n for (const line of lines) {\n const trimmed = line.trim();\n if (!trimmed || !trimmed.startsWith(\"data: \")) continue;\n const payload = trimmed.slice(6);\n if (payload === \"[DONE]\") { controller.enqueue(encoder2.encode(\"data: [DONE]\\n\\n\")); continue; }\n try {\n const json = JSON.parse(payload);\n const delta = json.choices?.[0]?.delta?.content;\n if (delta) controller.enqueue(encoder2.encode(`data: ${JSON.stringify({ t: delta })}\\n\\n`));\n } catch {}\n }\n }\n } catch (e) { console.error(\"Admin AI stream error:\", e); }\n finally { controller.close(); }\n },\n });\n\n return new Response(readable2, {\n headers: { \"Content-Type\": \"text/event-stream\", \"Cache-Control\": \"no-cache\", \"Connection\": \"keep-alive\", ...CORS_HEADERS },\n });\n});\n\n// ─── AI Chat (Mistral Large / Codestral) — streaming SSE ─────────────────────\napp.post(\"/api/ai/chat\", async (c) => {\n const user = await getSessionUser(c);\n if (!user) return c.json({ error: \"Not authenticated\" }, 401);\n const { messages, model } = await c.req.json();\n if (!messages?.length) return c.json({ error: \"Messages required\" }, 400);\n\n const isCodestral = model === \"codestral-latest\";\n const apiKey = isCodestral ? CODESTRAL_API_KEY : MISTRAL_API_KEY;\n const apiUrl = isCodestral\n ? \"https://codestral.mistral.ai/v1/chat/completions\"\n : \"https://api.mistral.ai/v1/chat/completions\";\n const selectedModel = isCodestral ? \"codestral-latest\" : \"mistral-large-latest\";\n const systemPrompt = isCodestral\n ? `You are Codestral, an AI coding assistant built into Huddle — a modern real-time messaging app. Help with debugging, code generation, code review, and technical questions. Be precise and include code examples.`\n : `You are Mist, a helpful AI assistant built directly into Huddle — a modern real-time messaging app. Be concise, friendly, and helpful.\n\nHere is everything you need to know about Huddle:\n\n## What is Huddle?\nHuddle is a real-time messaging platform with support for public and private group chats, reactions, replies, file sharing, AI assistance, and more. It has a dark/light theme toggle, a sidebar for navigation, and a clean chat interface.\n\n## Messaging\n- Type a message in the input box and press Enter (or the send button) to send.\n- Press Shift+Enter for a new line without sending.\n- Messages support @mentions — type @username to mention someone; they'll be notified by email.\n- You can paste long text (>100 chars or multi-line) and it shows as a collapsible \"pasted content\" chip before sending.\n- You can attach files up to 200 KB using the paperclip icon.\n- You can edit your own messages within 5 minutes of sending by long-pressing or right-clicking the message.\n- Messages that contain URLs automatically show a link preview card below them.\n\n## Reactions\n- Long-press (mobile) or right-click (desktop) any message to open the action bar.\n- The action bar shows 6 emoji reaction buttons, a Reply button, an Edit button (your own messages), and a Copy button.\n- Tap an emoji to react. Tap again to remove your reaction.\n- Reactions appear as small pill chips below the message, stacked horizontally from right to left.\n- Each chip shows the emoji and a count. Hovering shows who reacted.\n\n## Replies\n- Long-press or right-click a message and tap \"Reply\" to reply to it.\n- A reply preview bar appears above the input. Press the X to cancel.\n- The sent message will show a quoted preview of the message it replies to.\n\n## Rooms (Chats)\n- **World Chat** is a public room — every user can see and send messages there.\n- **Private Groups** are invite-only rooms you create yourself.\n- To create a group: click \"+ New Group\" in the sidebar, type a name, and press Enter or \"Create\".\n- To manage a group (invite/kick members, delete): click the \"Manage\" button in the chat header (only visible in private groups).\n- Only the room owner or admin can invite, kick, or delete a room.\n- You can leave a room from the Manage panel.\n\n## Profiles & Avatars\n- Click your username/avatar in the bottom-left sidebar to open your profile.\n- You can upload a profile photo (max 100 KB).\n- You can enable **Ghost Mode** to hide yourself from the public user list.\n- You can delete your account from the profile panel (messages stay but become anonymous).\n\n## Users Panel\n- Click the people icon in the sidebar header to open the Users panel.\n- You can search for users and block/unblock them. Blocked users' messages are hidden from you.\n\n## Search\n- Click the search icon in the chat header to search messages in the current room.\n- Results show the sender, message content, and timestamp. Minimum 2 characters to search.\n\n## Typing Indicators\n- When someone is typing, a \"… is typing\" indicator appears above the input area.\n\n## Theme\n- Toggle between dark and light mode using the sun/moon icon in the sidebar header.\n\n## Admin Features (admin only)\n- Access the Admin Panel from the sidebar footer.\n- Admins can view all users and rooms, ban users (temporary or permanent, with a custom message), mute users, and delete accounts.\n- Admins can see all rooms and are members of all rooms by default.\n\n## AI Assistant (that's you!)\n- You (Mist) are accessible by clicking \"Mistral AI\" in the sidebar.\n- There is also a Codestral model available for coding-specific help — users can switch models with the \"Switch model\" button.\n- Conversations are not saved between sessions.\n\n## Bookmarklet\n- There is a bookmarklet available at /bookmarklet that lets users access Huddle from any webpage.\n\nAlways answer questions about Huddle based on the above. If someone asks how to do something in the app, give them clear step-by-step instructions. If they ask something unrelated to Huddle, help them as a general assistant.`;\n\n const resp = await fetch(apiUrl, {\n method: \"POST\",\n headers: {\n \"Authorization\": `Bearer ${apiKey}`,\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({\n model: selectedModel,\n messages: [\n { role: \"system\", content: systemPrompt },\n ...messages,\n ],\n max_tokens: 1024,\n stream: true,\n }),\n });\n\n if (!resp.ok) {\n const err = await resp.text();\n console.error(\"AI error:\", err);\n return c.json({ error: \"AI service error\" }, 502);\n }\n\n // Stream SSE back to client\n const encoder = new TextEncoder();\n const readable = new ReadableStream({\n async start(controller) {\n const reader = resp.body!.getReader();\n const decoder = new TextDecoder();\n let buffer = \"\";\n try {\n while (true) {\n const { done, value } = await reader.read();\n if (done) break;\n buffer += decoder.decode(value, { stream: true });\n const lines = buffer.split(\"\\n\");\n buffer = lines.pop() || \"\";\n for (const line of lines) {\n const trimmed = line.trim();\n if (!trimmed || !trimmed.startsWith(\"data: \")) continue;\n const payload = trimmed.slice(6);\n if (payload === \"[DONE]\") {\n controller.enqueue(encoder.encode(\"data: [DONE]\\n\\n\"));\n continue;\n }\n try {\n const json = JSON.parse(payload);\n const delta = json.choices?.[0]?.delta?.content;\n if (delta) {\n controller.enqueue(encoder.encode(`data: ${JSON.stringify({ t: delta })}\\n\\n`));\n }\n } catch {}\n }\n }\n } catch (e) {\n console.error(\"Stream error:\", e);\n } finally {\n controller.close();\n }\n },\n });\n\n return new Response(readable, {\n headers: {\n \"Content-Type\": \"text/event-stream\",\n \"Cache-Control\": \"no-cache\",\n \"Connection\": \"keep-alive\",\n ...CORS_HEADERS,\n },\n });\n});\n\nexport default app.fetch;\n","deleted","label",[102],"permalink","https://www.val.town/x/lol2/Huddle/code/index.ts","extension","actionData","errors"]