smartacme/ts/smartacme.classes.certmatcher.ts

import * as plugins from './plugins.js';
import * as interfaces from './interfaces/index.js';

/**
 * certmatcher is responsible for matching certificates
 */
export class SmartacmeCertMatcher {
  /**
   * creates a domainName for the certificate that will include the broadest scope
   * for wild card certificates
   * @param domainNameArg the domainNameArg to create the scope from
   */
  public getCertificateDomainNameByDomainName(domainNameArg: string): string | undefined {
    // Handle wildcard domains by stripping the '*.' prefix.
    if (domainNameArg.startsWith('*.')) {
      return domainNameArg.slice(2);
    }
    const originalDomain = new plugins.smartstring.Domain(domainNameArg);
    // For domains with up to 3 levels (no level4), return base domain.
    if (!originalDomain.level4) {
      return `${originalDomain.level2}.${originalDomain.level1}`;
    }
    // Deeper domains (4+ levels) are not supported.
    return undefined;
  }
}