import { ExtractedContent } from './types';
/**
 * ContentExtractor - Extracts text, structure, and metadata from document buffers
 */
export declare class ContentExtractor {
    /**
     * Extract text content from a buffer
     * @param buffer - The document buffer
     * @param mimeType - MIME type of the document
     * @param language - Optional language/type identifier
     * @returns Extracted content with text, structure, and metadata
     */
    extractText(buffer: Buffer, mimeType: string, language?: string): ExtractedContent;
    /**
     * Extract markdown structure from text (headers → sections)
     * @param text - Markdown text content
     * @returns Array of sections
     */
    private extractMarkdownStructure;
    /**
     * Extract code structure (functions, classes) using regex
     * @param text - Code text content
     * @param language - Programming language
     * @returns Array of sections
     */
    private extractCodeStructure;
    /**
     * Extract TypeScript/JavaScript functions and classes
     */
    private extractTypeScriptStructure;
    /**
     * Extract Python functions and classes
     */
    private extractPythonStructure;
    /**
     * Check if a language is a code language
     */
    private isCodeLanguage;
    /**
     * Calculate word count from text
     */
    private calculateWordCount;
    /**
     * Calculate line count from text
     */
    private calculateLineCount;
}
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