import { Debugger } from 'debug/src/browser';
/**
 * @hidden
 * @internal
 * Limited to Microsoft-internal use.
 *
 * Implementation of URL pattern matching logic for validating origins against a list of allowed patterns.
 */
export interface URLVerifier {
    /**
     * Checks if the given URL matches the pattern defined in the implementation.
     * @param url - The URL to test against the pattern.
     * @returns - True if the URL matches the pattern, false otherwise.
     */
    test: (url: URL) => boolean;
}
/**
 * Checks if the provided host matches the given pattern, which may include a single wildcard segment.
 * @param pattern - reference pattern
 * @param host - candidate string
 * @returns returns true if host matches pre-know valid pattern
 *
 * @example
 *    validateHostAgainstPattern('*.teams.microsoft.com', 'subdomain.teams.microsoft.com') returns true
 *    validateHostAgainstPattern('test.*.teams.microsoft.com', 'test.subdomain.teams.microsoft.com') returns true
 *    validateHostAgainstPattern('teams.microsoft.com', 'team.microsoft.com') returns false
 *    validateHostAgainstPattern('*.*.microsoft.com', 'test.team.microsoft.com') returns false
 *
 * @internal
 * Limited to Microsoft-internal use
 */
export declare function validateHostAgainstPattern(pattern: string, host: string): boolean;
/**
 * @hidden
 * @internal
 * Limited to Microsoft-internal use.
 *
 * Checks if the provided pattern is valid for checking against URLs.
 * @param pattern - The pattern to validate.
 * @returns - True if the pattern is valid, false otherwise.
 */
export declare function isValidPatternUrl(pattern: string): boolean;
/**
 * @hidden
 * @internal
 * Limited to Microsoft-internal use.
 *
 * Creates a URL verifier based on the provided pattern.
 */
export declare function createURLVerifier(pattern: string, logger: Debugger): URLVerifier | undefined;