Add support for custom columns on catalog categories (#4708)

src/common/utils/__tests__/bind.test.ts

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { bind } from "../index";
+
+describe("bind", () => {
+  it("should work correctly", () => {
+    function foobar(bound: number, nonBound: number): number {
+      expect(typeof bound).toBe("number");
+      expect(typeof nonBound).toBe("number");
+
+      return bound + nonBound;
+    }
+    const foobarBound = bind(foobar, null, 5);
+
+    expect(foobarBound(10)).toBe(15);
+  });
+});

src/common/utils/collection-functions.ts

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+/**
+ * Get the value behind `key`. If it was not present, first insert `value`
+ * @param map The map to interact with
+ * @param key The key to insert into the map with
+ * @param value The value to optional add to the map
+ * @returns The value in the map
+ */
+export function getOrInsert<K, V>(map: Map<K, V>, key: K, value: V): V {
+  if (!map.has(key)) {
+    map.set(key, value);
+  }
+
+  return map.get(key);
+}

src/common/utils/index.ts

@@ -10,11 +10,19 @@ export function noop<T extends any[]>(...args: T): void {
   return void args;
 }
 
+/**
+ * A typecorrect version of <function>.bind()
+ */
+export function bind<BoundArgs extends any[], NonBoundArgs extends any[], ReturnType>(fn: (...args: [...BoundArgs, ...NonBoundArgs]) => ReturnType, thisArg: any, ...boundArgs: BoundArgs): (...args: NonBoundArgs) => ReturnType {
+  return fn.bind(thisArg, ...boundArgs);
+}
+
 export * from "./app-version";
 export * from "./autobind";
 export * from "./camelCase";
 export * from "./cloneJson";
 export * from "./cluster-id-url-parsing";
+export * from "./collection-functions";
 export * from "./convertCpu";
 export * from "./convertMemory";
 export * from "./debouncePromise";