refactor: use Effect config for HttpApi authorization (#25035)

packages/opencode/src/effect/config-service.ts

@@ -0,0 +1,67 @@
+import { Config, Context, Effect, Layer } from "effect"
+
+type ConfigMap = Record<string, Config.Config<unknown>>
+
+/**
+ * The service shape inferred from an object of Effect `Config` definitions.
+ */
+export type Shape<Fields extends ConfigMap> = {
+  readonly [Key in keyof Fields]: Config.Success<Fields[Key]>
+}
+
+/**
+ * A Context service class with generated layers for config-backed services.
+ */
+export type ServiceClass<Self, Id extends string, Service> = Context.ServiceClass<Self, Id, Service> & {
+  /** Provide already-parsed config, useful in tests. */
+  readonly layer: (input: Service) => Layer.Layer<Self>
+  /** Parse config once from the active Effect ConfigProvider and provide the service. */
+  readonly defaultLayer: Layer.Layer<Self, Config.ConfigError>
+}
+
+/**
+ * Create a Context service whose implementation is derived from Effect `Config`.
+ *
+ * This keeps Effect `Config` as the source of truth for env names, defaults, and
+ * validation while generating a typed service plus convenient production/test
+ * layers.
+ *
+ * ```ts
+ * class ServerAuthConfig extends ConfigService.Service<ServerAuthConfig>()(
+ *   "@opencode/ServerAuthConfig",
+ *   {
+ *     password: Config.string("OPENCODE_SERVER_PASSWORD").pipe(Config.option),
+ *     username: Config.string("OPENCODE_SERVER_USERNAME").pipe(Config.withDefault("opencode")),
+ *   },
+ * ) {}
+ *
+ * const live = ServerAuthConfig.defaultLayer
+ * const test = ServerAuthConfig.layer({ password: Option.some("secret"), username: "kit" })
+ * ```
+ */
+export const Service =
+  <Self>() =>
+  <const Id extends string, const Fields extends ConfigMap>(id: Id, fields: Fields) => {
+    class ConfigTag extends Context.Service<Self, Shape<Fields>>()(id) {
+      static layer(input: Shape<Fields>) {
+        return Layer.succeed(this, this.of(input))
+      }
+
+      static get defaultLayer() {
+        return Layer.effect(
+          this,
+          Config.all(fields)
+            .asEffect()
+            .pipe(
+              // oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion -- Config.all preserves the field shape, but its conditional return type also supports iterable inputs.
+              Effect.map((config) => this.of(config as Shape<Fields>)),
+            ),
+        )
+      }
+    }
+
+    // oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion -- The generated class carries typed static helpers.
+    return ConfigTag as ServiceClass<Self, Id, Shape<Fields>>
+  }
+
+export * as ConfigService from "./config-service"