Add QueryClient

packages/effect-fc/src/QueryClient.ts

@@ -0,0 +1,25 @@
+import { type HashMap, Pipeable, Predicate, type Subscribable, type SubscriptionRef } from "effect"
+import type * as Query from "./Query.js"
+import type * as Result from "./Result.js"
+
+
+export const QueryClientTypeId: unique symbol = Symbol.for("@effect-fc/QueryClient/QueryClient")
+export type QueryClientTypeId = typeof QueryClientTypeId
+
+export interface QueryClient extends Pipeable.Pipeable {
+    readonly [QueryClientTypeId]: QueryClientTypeId
+
+    readonly cache: Subscribable.Subscribable<HashMap.HashMap<Query.Query.AnyKey, Result.Final<unknown, unknown, unknown>>>
+}
+
+export class QueryClientImpl extends Pipeable.Class() implements QueryClient {
+    readonly [QueryClientTypeId]: QueryClientTypeId = QueryClientTypeId
+
+    constructor(
+        readonly cache: SubscriptionRef.SubscriptionRef<HashMap.HashMap<Query.Query.AnyKey, Result.Final<unknown, unknown, unknown>>>
+    ) {
+        super()
+    }
+}
+
+export const isQueryClient = (u: unknown): u is QueryClient => Predicate.hasProperty(u, QueryClientTypeId)