Refactoring

packages/extension-query/src/internal/MutationRunner.ts

@@ -0,0 +1,97 @@
+import * as AsyncData from "@typed/async-data"
+import { type Context, Effect, type Fiber, Queue, Ref, Stream, SubscriptionRef } from "effect"
+import type * as QueryClient from "../QueryClient.js"
+import * as QueryProgress from "../QueryProgress.js"
+import * as QueryState from "./QueryState.js"
+
+
+export interface MutationRunner<K extends readonly unknown[], A, E, R> {
+    readonly context: Context.Context<R>
+    readonly stateRef: SubscriptionRef.SubscriptionRef<AsyncData.AsyncData<A, E>>
+
+    readonly mutate: (...key: K) => Effect.Effect<AsyncData.Success<A> | AsyncData.Failure<E>>
+    readonly forkMutate: (...key: K) => Effect.Effect<readonly [
+        fiber: Fiber.RuntimeFiber<AsyncData.Success<A> | AsyncData.Failure<E>>,
+        state: Stream.Stream<AsyncData.AsyncData<A, E>>,
+    ]>
+}
+
+
+export interface MakeProps<EH, K extends readonly unknown[], A, E, HandledE, R> {
+    readonly QueryClient: QueryClient.GenericTagClass<EH, HandledE>
+    readonly mutation: (key: K) => Effect.Effect<A, E, R | QueryProgress.QueryProgress>
+}
+
+export const make = <EH, K extends readonly unknown[], A, E, HandledE, R>(
+    {
+        QueryClient,
+        mutation,
+    }: MakeProps<EH, K, A, E, HandledE, R>
+): Effect.Effect<
+    MutationRunner<K, A, Exclude<E, HandledE>, R>,
+    never,
+    R | QueryClient.TagClassShape<EH, HandledE> | EH
+> => Effect.gen(function*() {
+    const context = yield* Effect.context<R | QueryClient.TagClassShape<EH, HandledE> | EH>()
+    const globalStateRef = yield* SubscriptionRef.make(AsyncData.noData<A, Exclude<E, HandledE>>())
+
+    const run = (key: K) => Effect.all([
+        QueryClient,
+        QueryState.makeTag<A, Exclude<E, HandledE>>(),
+    ]).pipe(
+        Effect.flatMap(([client, state]) => client.ErrorHandler.pipe(
+            Effect.flatMap(errorHandler => state.set(AsyncData.loading()).pipe(
+                Effect.andThen(mutation(key)),
+                errorHandler.handle,
+                Effect.matchCauseEffect({
+                    onSuccess: v => Effect.succeed(AsyncData.success(v)).pipe(
+                        Effect.tap(state.set)
+                    ),
+                    onFailure: c => Effect.succeed(AsyncData.failure(c)).pipe(
+                        Effect.tap(state.set)
+                    ),
+                }),
+            ))
+        )),
+
+        Effect.provide(context),
+        Effect.provide(QueryProgress.QueryProgress.Live),
+    )
+
+    const mutate = (...key: K) => run(key).pipe(
+        Effect.provide(QueryState.layer(
+            QueryState.makeTag<A, Exclude<E, HandledE>>(),
+            globalStateRef,
+            value => Ref.set(globalStateRef, value),
+        ))
+    )
+
+    const forkMutate = (...key: K) => Effect.gen(function*() {
+        const stateRef = yield* Ref.make(AsyncData.noData<A, Exclude<E, HandledE>>())
+        const stateQueue = yield* Queue.unbounded<AsyncData.AsyncData<A, Exclude<E, HandledE>>>()
+
+        const fiber = yield* Effect.forkDaemon(run(key).pipe(
+            Effect.tap(() => Queue.shutdown(stateQueue)),
+
+            Effect.provide(QueryState.layer(
+                QueryState.makeTag<A, Exclude<E, HandledE>>(),
+                stateRef,
+                value => Queue.offer(stateQueue, value).pipe(
+                    Effect.andThen(Ref.set(stateRef, value)),
+                    Effect.andThen(Ref.set(globalStateRef, value)),
+                ),
+            )),
+        ))
+
+        return [fiber, Stream.fromQueue(stateQueue)] as const
+    })
+
+
+    return {
+        context,
+        stateRef: globalStateRef,
+
+        mutate,
+        forkMutate,
+    }
+})