refactor: injectRouteFragment

libs/ngxtension/inject-route-fragment/src/inject-route-fragment.ts

@@ -1,23 +1,25 @@
-import { inject, type Injector, type Signal } from '@angular/core';
+import { inject, type Signal } from '@angular/core';
 import { toSignal } from '@angular/core/rxjs-interop';
 import { ActivatedRoute } from '@angular/router';
 import { assertInjector } from 'ngxtension/assert-injector';
+import {
+	DefaultValueOptions,
+	InjectorOptions,
+	TransformOptions,
+} from 'ngxtension/shared';
 import { map } from 'rxjs';
 
-export interface InjectRouteFragmentOptions<T = unknown> {
-	/**
-	 * A transformation function.
-	 *
-	 * @param fragment - The fragment value to transform.
-	 * @returns The transformed value.
-	 */
-	transform?: (fragment: string | null) => T;
-
-	/**
-	 * The optional "custom" Injector. If this is not provided, will be retrieved from the current injection context
-	 */
-	injector?: Injector;
-}
+/**
+ * The `InjectRouteFragmentOptions` type defines options for configuring the behavior of the `injectRouteFragment` function.
+ *
+ * @template T - The expected type of the read value.
+ */
+export type InjectRouteFragmentOptions<T = unknown> = TransformOptions<
+	T,
+	string | null
+> &
+	InjectorOptions &
+	DefaultValueOptions<T>;
 
 /**
  * The `injectRouteFragment` function allows you to access and transform url fragment from the current route.
@@ -43,7 +45,13 @@ export function injectRouteFragment<T>(
 		const route = inject(ActivatedRoute);
 		const initialRouteFragment = route.snapshot.fragment;
 		const getFragment = (fragment: string | null) => {
-			if (options?.transform) return options.transform(fragment);
+			if (fragment === null && options?.defaultValue) {
+				return options.defaultValue;
+			}
+			if (options?.transform) {
+				return options.transform(fragment);
+			}
+
 			return fragment;
 		};
 		const fragment$ = route.fragment.pipe(map(getFragment));