/** * UsageLimitSources — quota from places this environment cannot run turns * on, today a CLIProxyAPI hub pooling several subscription accounts. * * Each configured `settings.usageLimitSources` entry is polled on the * provider health-check interval and on every settings change, then * published as one snapshot per source over `subscribeServerConfig`. A source * that fails keeps its row with `error` set so the user can see it is * configured but unreachable. Nothing is persisted: like provider status, * this is live state that re-derives on boot. * * @module usage/UsageLimitSources */import {  DEFAULT_PROVIDER_HEALTH_REFRESH_INTERVAL,  UsageLimitSourceError,  type UsageLimitSourceConsumeResetCreditInput,  type ProviderConsumeResetCreditResult,  type ServerSettings,  type UsageLimitSourceConfig,  type UsageLimitSourceId,  type UsageLimitSourceSnapshot,} from "@t3tools/contracts";import { resolveServerBackgroundActivitySettings } from "@t3tools/shared/backgroundActivitySettings";import * as Context from "effect/Context";import * as DateTime from "effect/DateTime";import * as Duration from "effect/Duration";import * as Effect from "effect/Effect";import * as Equal from "effect/Equal";import * as Layer from "effect/Layer";import * as PubSub from "effect/PubSub";import * as Ref from "effect/Ref";import * as Semaphore from "effect/Semaphore";import * as Stream from "effect/Stream"; import * as BackgroundPolicy from "../background/BackgroundPolicy.ts";import { ServerSettingsService } from "../serverSettings.ts";import { makeCliproxyApi } from "./cliproxyApi.ts"; export class UsageLimitSources extends Context.Service<  UsageLimitSources,  {    readonly current: Effect.Effect<ReadonlyArray<UsageLimitSourceSnapshot>>;    /** The current set followed by every change, with repeats dropped. */    readonly streamChanges: Stream.Stream<ReadonlyArray<UsageLimitSourceSnapshot>>;    /** Re-read every source now. Never fails; failures land on the snapshot. */    readonly refresh: Effect.Effect<void>;    readonly consumeResetCredit: (      input: UsageLimitSourceConsumeResetCreditInput,    ) => Effect.Effect<ProviderConsumeResetCreditResult, UsageLimitSourceError>;  }>()("t3/usage/UsageLimitSources") {} function sourceLabel(id: string, config: UsageLimitSourceConfig): string {  if (config.label) return config.label;  try {    return new URL(config.url).host;  } catch {    return id;  }} /** @public Service construction is part of the canonical Effect module API. */export const make = Effect.gen(function* () {  const api = yield* makeCliproxyApi;  const settingsService = yield* ServerSettingsService;  const backgroundPolicy = yield* BackgroundPolicy.BackgroundPolicy;  const stateRef = yield* Ref.make<ReadonlyArray<UsageLimitSourceSnapshot>>([]);  const changes = yield* Effect.acquireRelease(    PubSub.unbounded<ReadonlyArray<UsageLimitSourceSnapshot>>(),    PubSub.shutdown,  );   const readSource = Effect.fn("UsageLimitSources.readSource")(function* (    id: UsageLimitSourceId,    config: UsageLimitSourceConfig,  ) {    const checkedAt = DateTime.formatIso(yield* DateTime.now);    const base = { id, kind: config.kind, label: sourceLabel(id, config), checkedAt } as const;    if (config.managementKey.length === 0) {      return { ...base, accounts: [], error: "No management key configured." };    }    const accounts = yield* api.readAccounts(config).pipe(Effect.result);    if (accounts._tag === "Failure") {      yield* Effect.logDebug("usage limit source read failed", { id, cause: accounts.failure });      return { ...base, accounts: [], error: accounts.failure.detail };    }    return { ...base, accounts: accounts.success };  });   const publish = (next: ReadonlyArray<UsageLimitSourceSnapshot>) =>    Effect.gen(function* () {      const changed = yield* Ref.modify(stateRef, (previous) =>        Equal.equals(previous, next) ? [false, previous] : [true, next],      );      if (changed) yield* PubSub.publish(changes, next);    });   // One refresh at a time: a slow hub read started before a settings change  // must not publish after the change's own refresh and resurrect a removed  // source. Callers queue behind the in-flight run and see current settings.  const refreshLock = yield* Semaphore.make(1);  const refresh = Effect.gen(function* () {    const settings = yield* settingsService.getSettings.pipe(      Effect.orElseSucceed((): ServerSettings | null => null),    );    const entries = Object.entries(settings?.usageLimitSources ?? {}).filter(      ([, config]) => config.enabled,    );    const snapshots = yield* Effect.forEach(      entries,      ([id, config]) => readSource(id as UsageLimitSourceId, config),      { concurrency: 4 },    );    yield* publish(snapshots);  }).pipe(refreshLock.withPermits(1), Effect.ignoreCause({ log: true }));   // Shares the refresh lock so a stale in-flight read cannot overwrite a redemption.  const consumeResetCredit = (input: UsageLimitSourceConsumeResetCreditInput) =>    Effect.gen(function* () {      const settings = yield* settingsService.getSettings.pipe(        Effect.mapError(          () => new UsageLimitSourceError({ detail: "Could not read hub settings." }),        ),      );      const config = settings.usageLimitSources[input.sourceId];      if (!config?.enabled || !config.managementKey) {        return yield* new UsageLimitSourceError({          detail: "The usage limit source is missing or disabled.",        });      }      const result = yield* api.consume(config, input.accountId, input.creditId);      const snapshot = yield* readSource(input.sourceId, config);      const previous = yield* Ref.get(stateRef);      yield* publish(previous.map((source) => (source.id === input.sourceId ? snapshot : source)));      return result;    }).pipe(refreshLock.withPermits(1));   // Settings edits re-read straight away so a new hub shows up without  // waiting for the interval, and a removed one leaves the list.  yield* settingsService.streamChanges.pipe(    Stream.map((settings) => settings.usageLimitSources),    Stream.changes,    Stream.runForEach(() => refresh),    Effect.forkScoped,  );   const interval = settingsService.getSettings.pipe(    Effect.map(      (settings) => resolveServerBackgroundActivitySettings(settings).providerHealthRefreshInterval,    ),    Effect.orElseSucceed(() => DEFAULT_PROVIDER_HEALTH_REFRESH_INTERVAL),  );  yield* Effect.forever(    interval.pipe(      Effect.flatMap((wait) =>        Effect.sleep(Duration.toMillis(Duration.fromInputUnsafe(wait)) <= 0 ? "60 seconds" : wait),      ),      Effect.andThen(backgroundPolicy.shouldRunScopeWork({ type: "provider-status" })),      Effect.flatMap((shouldRun) => (shouldRun ? refresh : Effect.void)),      Effect.ignoreCause({ log: true }),    ),  ).pipe(Effect.forkScoped);   yield* refresh.pipe(Effect.forkScoped);   return {    current: Ref.get(stateRef),    consumeResetCredit,    refresh,    get streamChanges() {      return Stream.unwrap(        Effect.gen(function* () {          const subscription = yield* PubSub.subscribe(changes);          const snapshot = yield* Ref.get(stateRef);          return Stream.concat(Stream.make(snapshot), Stream.fromSubscription(subscription)).pipe(            Stream.changes,          );        }),      );    },  } satisfies UsageLimitSources["Service"];}); export const layer = Layer.effect(UsageLimitSources, make);