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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| import { fjp } from "../../deps.ts"; | ||
| import { storage } from "../../fsStorage.ts"; | ||
| import { Acked, Commands, Events, State } from "../../types.ts"; | ||
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| export interface Props { | ||
| /** Environment name to connect to */ | ||
| name: string; | ||
| } | ||
|
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| const subscribers: WebSocket[] = []; | ||
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| export const fetchState = async (): Promise<State> => ({ | ||
| decofile: await storage.state({ forceFresh: true }), | ||
| }); | ||
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| const saveState = ({ decofile }: State): Promise<void> => | ||
| storage.update(decofile); | ||
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| // Apply patch and save state ATOMICALLY! | ||
| // This is easily done on play. On production, however, we probably | ||
| // need a distributed queue | ||
| let queue = Promise.resolve(); | ||
| const patchState = (ops: fjp.Operation[]) => { | ||
| queue = queue.catch(() => null).then(async () => | ||
| saveState(ops.reduce(fjp.applyReducer, await fetchState())) | ||
| ); | ||
|
|
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| return queue; | ||
| }; | ||
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| const action = (_props: Props, req: Request) => { | ||
| const { socket, response } = Deno.upgradeWebSocket(req); | ||
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| const broadcast = (event: Acked<Events>) => { | ||
| const message = JSON.stringify(event); | ||
| subscribers.forEach((s) => s.send(message)); | ||
| }; | ||
| const send = (event: Acked<Events>) => socket.send(JSON.stringify(event)); | ||
| const parse = (event: MessageEvent<string>): Acked<Commands> => | ||
| JSON.parse(event.data); | ||
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| const open = () => subscribers.push(socket); | ||
| const close = () => subscribers.splice(subscribers.indexOf(socket), 1); | ||
| const message = async (event: MessageEvent<string>) => { | ||
| const data = parse(event); | ||
|
|
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| const { ack } = data; | ||
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| if (data.type === "patch-state") { | ||
| try { | ||
| const { payload: operations } = data; | ||
|
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| await patchState(operations); | ||
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| // Broadcast changes | ||
| broadcast({ | ||
| type: "state-patched", | ||
| payload: operations, | ||
| etag: await storage.revision(), | ||
| metadata: {}, // TODO: add metadata | ||
| ack, | ||
| }); | ||
| } catch ({ name, operation }) { | ||
| console.error({ name, operation }); | ||
| } | ||
| } else if (data.type === "fetch-state") { | ||
| send({ | ||
| type: "state-fetched", | ||
| payload: await fetchState(), | ||
| etag: await storage.revision(), | ||
| ack, | ||
| }); | ||
| } else { | ||
| console.error("UNKNOWN EVENT", event); | ||
| } | ||
| }; | ||
|
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| /** | ||
| * Handles the WebSocket connection on open event. | ||
| */ | ||
| socket.onopen = open; | ||
| /** | ||
| * Handles the WebSocket connection on close event. | ||
| */ | ||
| socket.onclose = close; | ||
|
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| /** | ||
| * Handles the WebSocket connection on message event. | ||
| * @param {MessageEvent} event - The WebSocket message event. | ||
| */ | ||
| socket.onmessage = (e) => message(e).catch(() => {}); | ||
|
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| return response; | ||
| }; | ||
|
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| export default action; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| import { fetchState } from "../../actions/releases/fork.ts"; | ||
| import { State } from "../../types.ts"; | ||
|
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| interface Props { | ||
| name: string; | ||
| } | ||
|
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| /** TODO(@gimenes): Implement fetching the state from the proper environment name */ | ||
| const action = async (_props: Props): Promise<State["decofile"]> => { | ||
| const { decofile } = await fetchState(); | ||
|
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| return decofile; | ||
| }; | ||
|
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| export default action; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,41 @@ | ||
| import { type Resolvable } from "deco/engine/core/resolver.ts"; | ||
| import { type fjp } from "./deps.ts"; | ||
|
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| export interface Pagination<T> { | ||
| data: T[]; | ||
| page: number; | ||
| pageSize: number; | ||
| total: number; | ||
| } | ||
|
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| export interface PatchState { | ||
| type: "patch-state"; | ||
| payload: fjp.Operation[]; | ||
| } | ||
|
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| export interface FetchState { | ||
| type: "fetch-state"; | ||
| } | ||
|
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| export interface StatePatched { | ||
| type: "state-patched"; | ||
| payload: fjp.Operation[]; | ||
| etag: string; | ||
| // Maybe add data and user info in here | ||
| metadata?: unknown; | ||
| } | ||
|
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| export interface StateFetched { | ||
| type: "state-fetched"; | ||
| payload: State; | ||
| etag: string; | ||
| } | ||
|
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| export type Acked<T> = T & { ack: string }; | ||
|
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| export interface State { | ||
| decofile: Record<string, Resolvable>; | ||
| } | ||
|
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| export type Commands = PatchState | FetchState; | ||
| export type Events = StatePatched | StateFetched; |
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