feat: add endpoint for workflow sharing (#4172) (no changelog)

* feat: add endpoint for workflow sharing

Co-authored-by: Ben Hesseldieck <b.hesseldieck@gmail.com>

packages/cli/src/UserManagement/UserManagementHelper.ts

@@ -39,6 +39,10 @@ export function isUserManagementEnabled(): boolean {
 	);
 }
 
+export function isSharingEnabled(): boolean {
+	return isUserManagementEnabled() && config.getEnv('enterprise.features.sharing');
+}
+
 export function isUserManagementDisabled(): boolean {
 	return (
 		config.getEnv('userManagement.disabled') &&
@@ -276,3 +280,24 @@ export async function compareHash(plaintext: string, hashed: string): Promise<bo
 		throw new Error(error);
 	}
 }
+
+// return the difference between two arrays
+export function rightDiff<T1, T2>(
+	[arr1, keyExtractor1]: [T1[], (item: T1) => string],
+	[arr2, keyExtractor2]: [T2[], (item: T2) => string],
+): T2[] {
+	// create map { itemKey => true } for fast lookup for diff
+	const keyMap = arr1.reduce<{ [key: string]: true }>((map, item) => {
+		// eslint-disable-next-line no-param-reassign
+		map[keyExtractor1(item)] = true;
+		return map;
+	}, {});
+
+	// diff against map
+	return arr2.reduce<T2[]>((acc, item) => {
+		if (!keyMap[keyExtractor2(item)]) {
+			acc.push(item);
+		}
+		return acc;
+	}, []);
+}