import type http from 'node:http';
export declare const OFFICE_EXTENSIONS: Set<string>;
export type OnlyOfficeDocumentType = 'word' | 'slide' | 'cell';
export type OnlyOfficeDocumentPreviewConfig = {
    documentType: OnlyOfficeDocumentType;
    type: 'embedded';
    height: string;
    width: string;
    document: {
        fileType: string;
        key: string;
        title: string;
        url: string;
        permissions: {
            comment: boolean;
            download: boolean;
            edit: boolean;
            fillForms: boolean;
            print: boolean;
            review: boolean;
        };
    };
    editorConfig: {
        callbackUrl: string;
        embedded: {
            autostart: 'document';
            embedUrl: string;
            fullscreenUrl: string;
            saveUrl: string;
            shareUrl: string;
            toolbarDocked: 'bottom';
        };
        lang: string;
        mode: 'view';
        customization: {
            autosave: boolean;
            chat: boolean;
            comments: boolean;
            compactHeader: boolean;
            compactToolbar: boolean;
            forcesave: boolean;
            help: boolean;
            logo: {
                visible: boolean;
                url: string;
            };
            layout: {
                header: {
                    editMode: boolean;
                    save: boolean;
                    user: boolean;
                    users: boolean;
                };
                toolbar: boolean;
            };
        };
    };
    token?: string;
};
export declare function isOfficePreviewPath(filePath: string): boolean;
export declare function ensureSpreadsheetPreviewXlsx(agentId: string, relPath: string, sourcePath: string): Promise<string>;
export declare function createOnlyOfficeDocumentPreview(relPath: string, sourcePath: string, sourceUrl: string): {
    documentServerUrl: string;
    config: OnlyOfficeDocumentPreviewConfig;
};
export declare function ensureOfficePreviewPdf(agentId: string, relPath: string, sourcePath: string, sourceUrl: string): Promise<string>;
export declare function issuePreviewToken(filePath: string): string;
export declare function resolvePreviewToken(token: string): {
    filePath: string;
    mimeType: string;
} | null;
export declare function servePreviewFile(req: http.IncomingMessage, res: http.ServerResponse, file: {
    filePath: string;
    mimeType: string;
}): void;
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