feat: allow providing abstract type (#2503)

* feat: allow providing abstract type

* feat: allow abstract type in Injector.get

* add changeset

Author: n1ru4l

.changeset/perfect-lamps-cheat.md

@@ -0,0 +1,5 @@
+---
+'graphql-modules': minor
+---
+
+Support passing an abstract class to `Injector.get` call and `Provider` value.

packages/graphql-modules/src/di/injector.ts

@@ -1,4 +1,4 @@
-import { Type, InjectionToken, Provider } from './providers';
+import { Type, InjectionToken, Provider, AbstractType } from './providers';
 import {
   ResolvedProvider,
   resolveProviders,
@@ -27,7 +27,10 @@ type ExecutionContextGetter = () => ExecutionContext | never;
 // We use ReflectiveInjector everywhere
 // but we don't want to leak its API to everyone
 export abstract class Injector {
-  abstract get<T>(token: Type<T> | InjectionToken<T>, notFoundValue?: any): T;
+  abstract get<T>(
+    token: Type<T> | InjectionToken<T> | AbstractType<T>,
+    notFoundValue?: any
+  ): T;
 }
 
 export class ReflectiveInjector implements Injector {

packages/graphql-modules/src/di/providers.ts

@@ -43,7 +43,7 @@ export interface FactoryProvider<T> extends BaseProvider<T> {
 }
 
 export interface BaseProvider<T> extends ProviderOptions {
-  provide: Type<T> | InjectionToken<T>;
+  provide: Type<T> | InjectionToken<T> | AbstractType<T>;
 }
 
 export interface TypeProvider<T> extends Type<T> {}