From cde634fbf4382198f72331ad5a652bd32f1a10a3 Mon Sep 17 00:00:00 2001
From: Justin Baur <19896123+justindbaur@users.noreply.github.com>
Date: Fri, 24 May 2024 16:31:27 -0400
Subject: [PATCH] Add Helper For Preparing a Record For Use in `forkJoin`

---
 .../common/src/platform/misc/convertValues.ts | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 libs/common/src/platform/misc/convertValues.ts

diff --git a/libs/common/src/platform/misc/convertValues.ts b/libs/common/src/platform/misc/convertValues.ts
new file mode 100644
index 00000000000..7a1087ec360
--- /dev/null
+++ b/libs/common/src/platform/misc/convertValues.ts
@@ -0,0 +1,23 @@
+import { ObservableInput, OperatorFunction, map } from "rxjs";
+
+/**
+ * Converts a record of keys and values into a record preserving the original key and converting each value into an {@link ObservableInput}.
+ * @param project A function to project a given key and value pair into an {@link ObservableInput}
+ */
+export function convertValues<TKey extends PropertyKey, TInput, TOutput>(
+  project: (key: TKey, value: TInput) => ObservableInput<TOutput>,
+): OperatorFunction<Record<TKey, TInput>, Record<TKey, ObservableInput<TOutput>>> {
+  return map((inputRecord) => {
+    if (inputRecord == null) {
+      return null;
+    }
+
+    // Can't use TKey in here, have to use `PropertyKey`
+    const result: Record<PropertyKey, ObservableInput<TOutput>> = {};
+    for (const [key, value] of Object.entries(inputRecord) as [TKey, TInput][]) {
+      result[key] = project(key, value);
+    }
+
+    return result;
+  });
+}