feature(): add typings to the provider interface

Author: kamilmysliwiec

packages/common/interfaces/modules/provider.interface.ts

@@ -1,26 +1,26 @@
 import { Scope } from '../scope-options.interface';
 import { Type } from '../type.interface';
 
-export type Provider =
+export type Provider<T = any> =
   | Type<any>
-  | ClassProvider
-  | ValueProvider
-  | FactoryProvider;
+  | ClassProvider<T>
+  | ValueProvider<T>
+  | FactoryProvider<T>;
 
-export interface ClassProvider {
-  provide: any;
-  useClass: Type<any>;
+export interface ClassProvider<T = any> {
+  provide: string | symbol | Type<any>;
+  useClass: Type<T>;
   scope?: Scope;
 }
 
-export interface ValueProvider {
-  provide: any;
-  useValue: any;
+export interface ValueProvider<T = any> {
+  provide: string | symbol | Type<any>;
+  useValue: T;
 }
 
-export interface FactoryProvider {
-  provide: any;
-  useFactory: (...args: any[]) => any;
+export interface FactoryProvider<T = any> {
+  provide: string | symbol | Type<any>;
+  useFactory: (...args: any[]) => T;
   inject?: Array<Type<any> | string | any>;
   scope?: Scope;
 }

packages/core/scanner.ts

@@ -31,7 +31,7 @@ import { MetadataScanner } from './metadata-scanner';
 interface ApplicationProviderWrapper {
   moduleKey: string;
   providerKey: string;
-  type: string;
+  type: string | symbol | Type<any>;
 }
 
 export class DependenciesScanner {
@@ -264,7 +264,7 @@ export class DependenciesScanner {
     const type = (provider as ClassProvider | ValueProvider | FactoryProvider)
       .provide;
 
-    if (!providersKeys.includes(type)) {
+    if (!providersKeys.includes(type as string)) {
       return this.container.addProvider(provider as any, token);
     }
     const providerToken = randomStringGenerator();
@@ -319,7 +319,7 @@ export class DependenciesScanner {
         const { providers } = modules.get(moduleKey);
         const { instance } = providers.get(providerKey);
 
-        applyProvidersMap[type](instance);
+        applyProvidersMap[type as string](instance);
       },
     );
   }