Move extension refresh redirect util function to libs so other clients can use it (#10979)

libs/angular/src/utils/extension-refresh-redirect.ts

@@ -0,0 +1,22 @@
+import { inject } from "@angular/core";
+import { UrlTree, Router } from "@angular/router";
+
+import { FeatureFlag } from "@bitwarden/common/enums/feature-flag.enum";
+import { ConfigService } from "@bitwarden/common/platform/abstractions/config/config.service";
+
+/**
+ * Helper function to redirect to a new URL based on the ExtensionRefresh feature flag.
+ * @param redirectUrl - The URL to redirect to if the ExtensionRefresh flag is enabled.
+ */
+export function extensionRefreshRedirect(redirectUrl: string): () => Promise<boolean | UrlTree> {
+  return async () => {
+    const configService = inject(ConfigService);
+    const router = inject(Router);
+    const shouldRedirect = await configService.getFeatureFlag(FeatureFlag.ExtensionRefresh);
+    if (shouldRedirect) {
+      return router.parseUrl(redirectUrl);
+    } else {
+      return true;
+    }
+  };
+}