converter/app/converterregistry.service.ts

import {Injectable} from "@angular/core";
import {Converter} from "./converter/converter";
import {Base64Encoder} from "./converter/base64encoder";
import {Base64Decoder} from "./converter/base64decoder";

@Injectable()
export class ConverterregistryService {
    private converters:Converter[] = [];

    constructor() {
        this.init();
    }

    public getAllConverters():Converter[] {
        return this.converters;
    }

    public getConverter(id:string):Converter {
        for (let i = 0; i < this.converters.length; i++) {
            if (this.converters[i].getId() == id) {
                return this.converters[i];
            }
        }
        return undefined;
    }

    private init():void {
        this.registerConverter(new Base64Encoder());
        this.registerConverter(new Base64Decoder());
    }

    private registerConverter(converter:Converter):void {
        this.converters.forEach((c:Converter) => {
            if (c.getId() == converter.getId()) {
                throw new Error("Converter-ID " + converter.getId() + " is already registered!");
            }
        });
        this.converters.push(converter);
    }
}