| 1 | import * as Cloudflare from "@/Cloudflare"; |
| 2 | import * as Effect from "effect/Effect"; |
| 3 | import * as Layer from "effect/Layer"; |
| 4 | import * as Stream from "effect/Stream"; |
| 5 | import * as RpcSerialization from "effect/rpc/RpcSerialization"; |
| 6 | import * as RpcServer from "effect/rpc/RpcServer"; |
| 7 | import ChatBackendRpc from "./ChatBackendRpc.ts"; |
| 8 | import { ChatRpcs } from "./ChatRpcs.ts"; |
| 9 | |
| 10 | // Same role as `ChatPersistenceWorker` (host the chat DO, route by |
| 11 | // thread id) but the whole `fetch` surface is a typed Effect |
| 12 | // `RpcGroup`. Each procedure proxies straight through the typed |
| 13 | // `getByName(id)` client returned by `RpcDurableObject`. |
| 14 | export default class ChatPersistenceRpcWorker extends Cloudflare.RpcWorker<ChatPersistenceRpcWorker>()( |
| 15 | "ChatPersistenceRpcWorker", |
| 16 | { |
| 17 | main: import.meta.url, |
| 18 | schema: ChatRpcs, |
| 19 | }, |
| 20 | Effect.gen(function* () { |
| 21 | // Yielding the inline DO hosts it on this Worker and hands back the |
| 22 | // typed namespace. |
| 23 | const chats = yield* ChatBackendRpc; |
| 24 | |
| 25 | const handlers = ChatRpcs.toLayer({ |
| 26 | send: ({ id, prompt }) => |
| 27 | Effect.flatMap(chats.getByName(id), (client) => |
| 28 | client.send({ prompt }), |
| 29 | ).pipe(Effect.orDie), |
| 30 | streamMessage: ({ id, prompt }) => |
| 31 | chats.getByName(id).pipe( |
| 32 | Effect.map((client) => client.streamMessage({ prompt })), |
| 33 | Stream.unwrap, |
| 34 | Stream.orDie, |
| 35 | ), |
| 36 | }); |
| 37 | |
| 38 | return RpcServer.toHttpEffect(ChatRpcs).pipe( |
| 39 | Effect.provide(Layer.mergeAll(handlers, RpcSerialization.layerNdjson)), |
| 40 | ); |
| 41 | }), |
| 42 | ) {} |