converter/app/inputcomponentmanager.service.ts

import {Injectable} from "@angular/core";

@Injectable()
export class InputComponentManagerService {
    private components:any[] = [];

    public constructor() {
    }

    public register(component:any):void {
        this.components.push(component);
    }

    public getAllComponents():any[] {
        return this.components;
    }

    public getNext(component:any):any {
        let index:number = component.index;
        if (index == this.components.length - 1) {
            this.addComponent();
        }
        return this.components[index + 1];
    }

    public getFirst():any {
        if (this.components.length == 0) {
            this.addComponent();
        }
        return this.components[0];
    }

    private addComponent():void {
        this.register({
            content: "",
            selectedConverter: undefined,
            index: this.components.length,
            error: false,
            message: ""
        });
    }
}