import { ElementRef, EventEmitter, OnInit } from '@angular/core';
import { FormControl } from '@angular/forms';
import { ChatContact } from '../../interfaces/chat-contact.interface';
import { ChatMessage } from '../../interfaces/chat-message.interface';
import { ChatService } from '../../services/chat.service';
export declare class NgxWachatContentComponent implements OnInit {
    private chatService;
    origin: ChatContact;
    destination: ChatContact;
    height: any;
    placeholder: string;
    sendMessage: EventEmitter<string>;
    scrollContent: ElementRef;
    control: FormControl;
    messages: ChatMessage[];
    constructor(chatService: ChatService);
    ngOnInit(): void;
    listenChangeMessages(): void;
    filterMessages(collection: ChatMessage[]): ChatMessage[];
    onKeyEnter(): void;
    scrollToBottom(): void;
}