/**
 * Utility for extracting text from various document formats
 * Using established libraries for better reliability
 */
/**
 * Extracts text from a PDF document using pdf-parse library
 * @param data The PDF document as a Buffer
 * @returns The extracted text content
 */
export declare function extractTextFromPdf(data: ArrayBuffer): Promise<string>;
/**
 * Extracts text from a DOCX document using mammoth library
 * @param data The DOCX document as an ArrayBuffer
 * @returns The extracted text content
 */
export declare function extractTextFromDocx(data: ArrayBuffer): Promise<string>;
/**
 * Summarizes the extracted text to a reasonable length
 * @param text The full extracted text
 * @param maxLength Maximum length of the summary (default: 8000 characters)
 * @param offset Starting position for extraction (default: 0)
 * @returns Object containing the summarized text and pagination info
 */
export declare function summarizeText(text: string, maxLength?: number, offset?: number): {
    text: string;
    isTruncated: boolean;
    totalLength: number;
    currentOffset: number;
    nextOffset: number | null;
    remainingLength: number;
};