// NG2
import { ComponentFactoryResolver, ComponentRef, Injectable, Injector, ReflectiveInjector, ViewContainerRef, ResolvedReflectiveProvider } from '@angular/core';

@Injectable()
export class ComponentUtils {
    componentFactoryResolver: ComponentFactoryResolver;

    constructor(componentFactoryResolver: ComponentFactoryResolver) {
        this.componentFactoryResolver = componentFactoryResolver;
    }

    appendNextToLocation(ComponentClass, location: ViewContainerRef, providers?: ResolvedReflectiveProvider[]): ComponentRef<any> {
        let componentFactory = this.componentFactoryResolver.resolveComponentFactory(ComponentClass);
        let parentInjector = location.parentInjector;
        let childInjector: Injector = parentInjector;
        if (providers && providers.length > 0) {
            childInjector = ReflectiveInjector.fromResolvedProviders(providers, parentInjector);
        }
        return location.createComponent(componentFactory, location.length, childInjector);
    }
}