Fix check on NamespaceSelectFilter not updating (#5691)

src/common/utils/index.ts

@@ -3,13 +3,6 @@
  * Licensed under MIT License. See LICENSE in root directory for more information.
  */
 
-/**
- * A function that does nothing
- */
-export function noop<T extends any[]>(...args: T): void {
-  return void args;
-}
-
 export * from "./abort-controller";
 export * from "./app-version";
 export * from "./autobind";
@@ -27,6 +20,8 @@ export * from "./formatDuration";
 export * from "./getRandId";
 export * from "./hash-set";
 export * from "./n-fircate";
+export * from "./noop";
+export * from "./observable-crate/impl";
 export * from "./openBrowser";
 export * from "./paths";
 export * from "./promise-exec";

src/common/utils/noop.ts

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+/**
+ * A function that does nothing
+ */
+export function noop<T extends any[]>(...args: T): void {
+  return void args;
+}

src/common/utils/observable-crate/impl.ts

@@ -0,0 +1,53 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import { observable, runInAction } from "mobx";
+import { getOrInsertMap } from "../collection-functions";
+import { noop } from "../noop";
+
+export interface ObservableCrate<T> {
+  get(): T;
+  set(value: T): void;
+}
+
+export interface ObservableCrateFactory {
+  <T>(initialValue: T, transitionHandlers?: ObservableCrateTransitionHandlers<T>): ObservableCrate<T>;
+}
+
+export interface ObservableCrateTransitionHandler<T> {
+  from: T;
+  to: T;
+  onTransition: () => void;
+}
+export type ObservableCrateTransitionHandlers<T> = ObservableCrateTransitionHandler<T>[];
+
+function convertToHandlersMap<T>(handlers: ObservableCrateTransitionHandlers<T>): Map<T, Map<T, () => void>> {
+  const res: ReturnType<typeof convertToHandlersMap<T>> = new Map();
+
+  for (const { from, to, onTransition } of handlers) {
+    getOrInsertMap(res, from).set(to, onTransition);
+  }
+
+  return res;
+}
+
+export const observableCrate = ((initialValue, transitionHandlers = []) => {
+  const crate = observable.box(initialValue);
+  const handlers = convertToHandlersMap(transitionHandlers);
+
+  return {
+    get() {
+      return crate.get();
+    },
+    set(value) {
+      const onTransition = handlers.get(crate.get())?.get(value) ?? noop;
+
+      runInAction(() => {
+        crate.set(value);
+        onTransition();
+      });
+    },
+  };
+}) as ObservableCrateFactory;

src/common/utils/observable-crate/observable-crate.test.ts

@@ -0,0 +1,116 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import type { ObservableCrate } from "./impl";
+import { observableCrate } from "./impl";
+
+describe("observable-crate", () => {
+  it("can be constructed with initial value", () => {
+    expect(() => observableCrate(0)).not.toThrow();
+  });
+
+  it("has a definite type if the initial value is provided", () => {
+    expect (() => {
+      const res: ObservableCrate<number> = observableCrate(0);
+
+      void res;
+    }).not.toThrow();
+  });
+
+  it("accepts an array of transitionHandlers", () => {
+    expect(() => observableCrate(0, [])).not.toThrow();
+  });
+
+  describe("with a crate over an enum, and some transition handlers", () => {
+    enum Test {
+      Start,
+      T1,
+      End,
+    }
+
+    let crate: ObservableCrate<Test>;
+    let correctHandler: jest.MockedFunction<() => void>;
+    let incorrectHandler: jest.MockedFunction<() => void>;
+
+    beforeEach(() => {
+      correctHandler = jest.fn();
+      incorrectHandler = jest.fn();
+      crate = observableCrate(Test.Start, [
+        {
+          from: Test.Start,
+          to: Test.Start,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.Start,
+          to: Test.T1,
+          onTransition: correctHandler,
+        },
+        {
+          from: Test.Start,
+          to: Test.End,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.T1,
+          to: Test.Start,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.T1,
+          to: Test.T1,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.T1,
+          to: Test.End,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.End,
+          to: Test.Start,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.End,
+          to: Test.T1,
+          onTransition: incorrectHandler,
+        },
+        {
+          from: Test.End,
+          to: Test.End,
+          onTransition: incorrectHandler,
+        },
+      ]);
+    });
+
+    it("initial value is available", () => {
+      expect(crate.get()).toBe(Test.Start);
+    });
+
+    it("does not call any transition handler", () => {
+      expect(correctHandler).not.toBeCalled();
+      expect(incorrectHandler).not.toBeCalled();
+    });
+
+    describe("when setting a new value", () => {
+      beforeEach(() => {
+        crate.set(Test.T1);
+      });
+
+      it("calls the associated transition handler", () => {
+        expect(correctHandler).toBeCalled();
+      });
+
+      it("does not call any other transition handler", () => {
+        expect(incorrectHandler).not.toBeCalled();
+      });
+
+      it("new value is available", () => {
+        expect(crate.get()).toBe(Test.T1);
+      });
+    });
+  });
+});