Country State Service
This provides a service for other components to use to retrieve country and state information.
Requirements
The Country State Service interface:
export interface CountryStateServiceInterface {
getCountriesOptions(): Observable<Country[]>;
getStatesOptions(countryCode: string): Observable<State[]>;
}To implement the interface make a new service that implements the interface:
…
import {CountryStateServiceInterface, Country, State} from '@vendasta/country-state-service';
@Injectable()
export class CountryStateService implements CountryStateServiceInterface {
…
getCountriesOptions(): Observable<Country[]> {
// Implement how the project will return the list of countries
}
getStatesOptions(countryCode: string): Observable<State[]> {
// Implement how the project will return the list of states for the country
}
}Next you will need to provide your service as that interface (generally in app.module.ts)
import { CountryStateService } from './country-state.service';
import { CountryStateServiceInterfaceToken } from '@vendasta/country-state-service';
…
@NgModule({
…
providers: [
CountryStateService, {provide: CountryStateServiceInterfaceToken, useExisting: CountryStateService}
],
})- Note: To be able to inject an interface, you will have to provide the InjectionToken and not the interface itself (
CountryStateServiceInterfaceTokenvsCountryStateServiceInterface).