api.module.ts•1.02 kB
import { NgModule, ModuleWithProviders, SkipSelf, Optional } from '@angular/core';
import { Configuration } from './configuration';
import { HttpClient } from '@angular/common/http';
@NgModule({
imports: [],
declarations: [],
exports: [],
providers: []
})
export class ApiModule {
public static forRoot(configurationFactory: () => Configuration): ModuleWithProviders<ApiModule> {
return {
ngModule: ApiModule,
providers: [ { provide: Configuration, useFactory: configurationFactory } ]
};
}
constructor( @Optional() @SkipSelf() parentModule: ApiModule,
@Optional() http: HttpClient) {
if (parentModule) {
throw new Error('ApiModule is already loaded. Import in your base AppModule only.');
}
if (!http) {
throw new Error('You need to import the HttpClientModule in your AppModule! \n' +
'See also https://github.com/angular/angular/issues/20575');
}
}
}