import {Injectable} from '@angular/core';
import {ConversationAlreadyStartedException} from '../exceptions/conversation-already-started.exception';
import {Conversation} from '../objects/conversation';

@Injectable()
export class ConversationService {
    conversation: Conversation = null;

    constructor() {
    }

    beginConversation(): void {
        if (this.conversation) {
            throw new ConversationAlreadyStartedException();
        }
        this.conversation = new Conversation();
    }

    endConversation(): void {
        this.conversation = null;
    }

    isActive(): boolean {
        return this.conversation !== null;
    }
}