/**
 * SVG File Processor
 *
 * Processes SVG files as TEXT content, not as images, because:
 * 1. Most AI vision models don't support SVG format directly
 * 2. SVG is XML-based and can be analyzed as code/markup
 * 3. SVG can contain security risks (scripts, XSS vectors)
 *
 * Security: Uses OWASP-compliant allowlist-based SVG sanitization
 *
 * @module processors/markup/SvgProcessor
 *
 * @example
 * ```typescript
 * import { svgProcessor, processSvg, isSvgFile } from "./markup/SvgProcessor.js";
 *
 * // Check if file is SVG
 * if (isSvgFile(mimetype, filename)) {
 *   const result = await processSvg(fileInfo);
 *   if (result.success) {
 *     console.log('Sanitized SVG:', result.data.textContent);
 *     if (result.data.securityWarnings.length > 0) {
 *       console.warn('Security warnings:', result.data.securityWarnings);
 *     }
 *   }
 * }
 * ```
 */
import { BaseFileProcessor } from "../base/BaseFileProcessor.js";
import type { FileInfo, ProcessorFileProcessingResult, ProcessOptions, ProcessedSvg } from "../../types/index.js";
/**
 * SVG Processor - processes SVG as TEXT, not as image.
 *
 * Why text instead of image:
 * 1. Most AI vision models don't support SVG format
 * 2. SVG is XML-based and can be analyzed as markup
 * 3. Security: SVG can contain scripts and XSS vectors
 *
 * Priority: 5 (before IMAGE at priority 10)
 *
 * @example
 * ```typescript
 * const processor = new SvgProcessor();
 *
 * const result = await processor.processFile({
 *   id: 'svg-123',
 *   name: 'diagram.svg',
 *   mimetype: 'image/svg+xml',
 *   size: 2048,
 *   url: 'https://example.com/diagram.svg',
 * });
 *
 * if (result.success) {
 *   // Use sanitized SVG text content
 *   console.log(result.data.textContent);
 * }
 * ```
 */
export declare class SvgProcessor extends BaseFileProcessor<ProcessedSvg> {
    constructor();
    /**
     * Validate downloaded SVG file.
     * Checks for valid XML structure (SVG must contain <svg> element).
     *
     * @param buffer - Downloaded file content
     * @param fileInfo - Original file information
     * @returns null if valid, error message if invalid
     */
    protected validateDownloadedFile(buffer: Buffer, _fileInfo: FileInfo): Promise<string | null>;
    /**
     * Build processed SVG result with sanitized content.
     * Applies security sanitization to remove potentially malicious content.
     *
     * @param buffer - Downloaded file content
     * @param fileInfo - Original file information
     * @returns Processed SVG result with sanitized text content
     */
    protected buildProcessedResult(buffer: Buffer, fileInfo: FileInfo): ProcessedSvg;
}
/**
 * Singleton SVG processor instance.
 * Use this for most processing needs.
 *
 * @example
 * ```typescript
 * import { svgProcessor } from "./markup/SvgProcessor.js";
 *
 * const result = await svgProcessor.processFile(fileInfo);
 * ```
 */
export declare const svgProcessor: SvgProcessor;
/**
 * Check if a file is an SVG file.
 *
 * @param mimetype - MIME type of the file
 * @param filename - Filename (for extension-based detection)
 * @returns true if the file is an SVG
 *
 * @example
 * ```typescript
 * if (isSvgFile('image/svg+xml', 'diagram.svg')) {
 *   // Handle as SVG
 * }
 *
 * // Also works with just filename
 * if (isSvgFile('', 'icon.svg')) {
 *   // Handle as SVG based on extension
 * }
 * ```
 */
export declare function isSvgFile(mimetype: string, filename: string): boolean;
/**
 * Validate SVG file size against configured limit.
 *
 * @param sizeBytes - File size in bytes
 * @returns true if size is within the allowed limit (5 MB)
 *
 * @example
 * ```typescript
 * if (!validateSvgSize(fileInfo.size)) {
 *   console.error('SVG file is too large');
 * }
 * ```
 */
export declare function validateSvgSize(sizeBytes: number): boolean;
/**
 * Process a single SVG file.
 * Convenience function that uses the singleton processor.
 *
 * @param fileInfo - File information (can include URL or buffer)
 * @param options - Optional processing options (auth headers, timeout, retry config)
 * @returns Processing result with sanitized SVG text content
 *
 * @example
 * ```typescript
 * const result = await processSvg({
 *   id: 'svg-123',
 *   name: 'diagram.svg',
 *   mimetype: 'image/svg+xml',
 *   size: 2048,
 *   buffer: svgBuffer,
 * });
 *
 * if (result.success) {
 *   console.log('Processed SVG:', result.data.textContent);
 *   if (result.data.sanitized) {
 *     console.log('Content was sanitized for security');
 *   }
 * } else {
 *   console.error('Processing failed:', result.error.userMessage);
 * }
 * ```
 */
export declare function processSvg(fileInfo: FileInfo, options?: ProcessOptions): Promise<ProcessorFileProcessingResult<ProcessedSvg>>;