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node_modules/effect/src/Subscribable.ts

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+/**
+ * @since 2.0.0
+ */
+import * as Effect from "./Effect.js"
+import { dual } from "./Function.js"
+import { pipeArguments } from "./Pipeable.js"
+import { hasProperty } from "./Predicate.js"
+import * as Readable from "./Readable.js"
+import * as Stream from "./Stream.js"
+import type { NoInfer } from "./Types.js"
+
+/**
+ * @since 2.0.0
+ * @category type ids
+ */
+export const TypeId: unique symbol = Symbol.for("effect/Subscribable")
+
+/**
+ * @since 2.0.0
+ * @category type ids
+ */
+export type TypeId = typeof TypeId
+
+/**
+ * @since 2.0.0
+ * @category models
+ */
+export interface Subscribable<A, E = never, R = never> extends Readable.Readable<A, E, R> {
+  readonly [TypeId]: TypeId
+  readonly changes: Stream.Stream<A, E, R>
+}
+
+/**
+ * @since 2.0.0
+ * @category refinements
+ */
+export const isSubscribable = (u: unknown): u is Subscribable<unknown, unknown, unknown> => hasProperty(u, TypeId)
+
+const Proto: Omit<Subscribable<any>, "get" | "changes"> = {
+  [Readable.TypeId]: Readable.TypeId,
+  [TypeId]: TypeId,
+  pipe() {
+    return pipeArguments(this, arguments)
+  }
+}
+
+/**
+ * @since 2.0.0
+ * @category constructors
+ */
+export const make = <A, E, R>(options: {
+  readonly get: Effect.Effect<A, E, R>
+  readonly changes: Stream.Stream<A, E, R>
+}): Subscribable<A, E, R> => Object.assign(Object.create(Proto), options)
+
+/**
+ * @since 2.0.0
+ * @category combinators
+ */
+export const map: {
+  /**
+   * @since 2.0.0
+   * @category combinators
+   */
+  <A, B>(f: (a: NoInfer<A>) => B): <E, R>(fa: Subscribable<A, E, R>) => Subscribable<B, E, R>
+  /**
+   * @since 2.0.0
+   * @category combinators
+   */
+  <A, E, R, B>(self: Subscribable<A, E, R>, f: (a: NoInfer<A>) => B): Subscribable<B, E, R>
+} = dual(2, <A, E, R, B>(self: Subscribable<A, E, R>, f: (a: NoInfer<A>) => B): Subscribable<B, E, R> =>
+  make({
+    get: Effect.map(self.get, f),
+    changes: Stream.map(self.changes, f)
+  }))
+
+/**
+ * @since 2.0.0
+ * @category combinators
+ */
+export const mapEffect: {
+  /**
+   * @since 2.0.0
+   * @category combinators
+   */
+  <A, B, E2, R2>(f: (a: NoInfer<A>) => Effect.Effect<B, E2, R2>): <E, R>(fa: Subscribable<A, E, R>) => Subscribable<B, E | E2, R | R2>
+  /**
+   * @since 2.0.0
+   * @category combinators
+   */
+  <A, E, R, B, E2, R2>(
+    self: Subscribable<A, E, R>,
+    f: (a: NoInfer<A>) => Effect.Effect<B, E2, R2>
+  ): Subscribable<B, E | E2, R | R2>
+} = dual(2, <A, E, R, B, E2, R2>(
+  self: Subscribable<A, E, R>,
+  f: (a: NoInfer<A>) => Effect.Effect<B, E2, R2>
+): Subscribable<B, E | E2, R | R2> =>
+  make({
+    get: Effect.flatMap(self.get, f),
+    changes: Stream.mapEffect(self.changes, f)
+  }))
+
+/**
+ * @since 2.0.0
+ * @category constructors
+ */
+export const unwrap = <A, E, R, E1, R1>(
+  effect: Effect.Effect<Subscribable<A, E, R>, E1, R1>
+): Subscribable<A, E | E1, R | R1> =>
+  make({
+    get: Effect.flatMap(effect, (s) => s.get),
+    changes: Stream.unwrap(Effect.map(effect, (s) => s.changes))
+  })