import { OnInit, ChangeDetectorRef, EventEmitter } from '@angular/core';
import { LetterOnBoard } from '@schoolbelle/api/letter-to-board';
import { GroupService } from '@schoolbelle/api/group';
import { BoardService } from '@schoolbelle/api/board';
import { BadgeService } from '@schoolbelle/api/badge';
export declare class LetterMetadataComponent implements OnInit {
    group: GroupService;
    board: BoardService;
    protected badge: BadgeService;
    protected cdRef: ChangeDetectorRef;
    item: LetterOnBoard;
    posted_at: boolean;
    onCommentClick: EventEmitter<{}>;
    onReadClick: EventEmitter<{}>;
    constructor(group: GroupService, board: BoardService, badge: BadgeService, cdRef: ChangeDetectorRef);
    ngOnInit(): void;
    readonly isCommentNew: boolean;
    openCommentModal(): void;
    openReadListModal(item: LetterOnBoard): void;
}