import { Attachment } from 'stream-chat';
import * as i0 from "@angular/core";
/**
 * The message service contains configuration options related to displaying the message content
 */
export declare class MessageService {
    /**
     * Decides if the message content should be formatted as text or HTML
     *
     * If you display messages as text the following parts are still be displayed as HTML:
     * - user mentions -> you can customize this with your own template using the [`customTemplatesService.mentionTemplate$`](/chat/docs/sdk/angular/services/CustomTemplatesService/#mentiontemplate)
     * - links -> you can customize this by providing you own [`customLinkRenderer`](#customlinkrenderer) method
     */
    displayAs: 'text' | 'html';
    /**
     * You can provide a custom method to display links
     * @param url the url the link should refer to
     * @returns the HTML markup as a string for the link
     */
    customLinkRenderer?: (url: string) => string;
    /**
     * The SDK supports the following attachment types: `image`, `file`, `giphy`, `video` and `voiceRecording` attachments.
     *
     * All other types are treated as custom attachments, however it's possible to override this logic, and provide a custom filtering method which can be used to treat some built-in attachments as custom.
     *
     * Provide a method which retruns `true` if an attachment should be considered as custom.
     */
    filterCustomAttachment?: (attachment: Attachment) => boolean;
    constructor();
    /**
     * Tells if an attachment is custom (you need to provide your own template to display them) or built-in (the SDK supports it out-of-the-box)
     * @param attachment
     * @returns `true` if the attachment is custom
     */
    isCustomAttachment(attachment: Attachment): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<MessageService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<MessageService>;
}