/**
 * File utility functions for common operations
 */
export declare class FileUtils {
    /**
     * Extract filename from a file path
     *
     * @param filePath - The file path to extract the filename from
     * @returns The filename (including extension) or the original path if no path separators
     * @example
     * ```typescript
     * const fileName = FileUtils.getFileName('/path/to/file.js');
     * console.log(fileName); // 'file.js'
     * ```
     */
    static getFileName(filePath: string): string;
    /**
     * Get file extension from a file path
     *
     * @param filePath - The file path to extract the extension from
     * @returns The file extension in lowercase (including the dot)
     * @example
     * ```typescript
     * const extension = FileUtils.getFileExtension('file.js');
     * console.log(extension); // '.js'
     * ```
     */
    static getFileExtension(filePath: string): string;
    /**
     * Check if a file is a JavaScript/TypeScript file
     *
     * @param filePath - The file path to check
     * @returns True if the file is a JavaScript/TypeScript file
     * @example
     * ```typescript
     * const isJs = FileUtils.isJavaScriptFile('app.js');
     * console.log(isJs); // true
     * ```
     */
    static isJavaScriptFile(filePath: string): boolean;
    /**
     * Check if a file is an Apex file
     *
     * @param filePath - The file path to check
     * @returns True if the file is an Apex class or trigger file
     * @example
     * ```typescript
     * const isApex = FileUtils.isApexFile('MyClass.cls');
     * console.log(isApex); // true
     * ```
     */
    static isApexFile(filePath: string): boolean;
    /**
     * Check if a file is a test file based on filename or content
     *
     * @param filePath - The file path to check
     * @param content - Optional file content to analyze for test annotations
     * @returns True if the file is identified as a test file
     * @example
     * ```typescript
     * const isTest = FileUtils.isTestFile('MyTest.cls', 'public class MyTest { @isTest void test() {} }');
     * console.log(isTest); // true
     * ```
     */
    static isTestFile(filePath: string, content?: string): boolean;
    /**
     * Normalize file path for consistent comparison
     *
     * @param filePath - The file path to normalize
     * @returns The normalized file path with forward slashes
     * @example
     * ```typescript
     * const normalized = FileUtils.normalizePath('src\\file.js');
     * console.log(normalized); // 'src/file.js'
     * ```
     */
    static normalizePath(filePath: string): string;
    /**
     * Create a unique entry key for deduplication
     *
     * @param fileName - The name of the file
     * @param ruleId - The rule identifier
     * @param lineNumber - The line number where the issue occurs
     * @returns A unique string key for the entry
     * @example
     * ```typescript
     * const key = FileUtils.createEntryKey('file.js', 'no-unused-vars', 42);
     * console.log(key); // 'file.js-no-unused-vars-42'
     * ```
     */
    static createEntryKey(fileName: string, ruleId: string, lineNumber: number): string;
    /**
     * Remove file extension from filename
     *
     * @param fileName - The filename to process
     * @returns The filename without its extension
     * @example
     * ```typescript
     * const nameWithoutExt = FileUtils.removeExtension('file.js');
     * console.log(nameWithoutExt); // 'file'
     * ```
     */
    static removeExtension(fileName: string): string;
}