static downloadedVersions_()

in lib/files/file_manager.ts [110:143]

• 28 lines of code
• 9 McCabe index (conditional complexity)

  static downloadedVersions_<T extends Binary>(
      binary: T, osType: string, arch: string, existingFiles: string[]): DownloadedBinary {
    let versions: string[] = [];
    for (let existPos in existingFiles) {
      let existFile: string = existingFiles[existPos];
      // use only files that have a prefix and suffix that we care about
      if (existFile.indexOf(binary.prefix()) === 0) {
        let editExistFile = existFile.replace(binary.prefix(), '');
        // if the suffix matches the executable suffix, add it
        if (binary.suffix() === binary.executableSuffix()) {
          versions.push(editExistFile.replace(binary.suffix(), ''));
        }
        // if the suffix does not match the executable,
        // the binary is something like: .exe and .zip
        // TODO(cnishina): fix implementation. Suffix method is dependent on the version number
        // example: chromedriver < 2.23 has a different suffix than 2.23+ (mac32.zip vs mac64.zip).
        else if (
            !existFile.endsWith('.zip') && !existFile.endsWith('.tar.gz') &&
            existFile.indexOf(binary.suffix()) === -1) {
          editExistFile = editExistFile.replace(binary.executableSuffix(), '');
          editExistFile = editExistFile.indexOf('_') === 0 ?
              editExistFile.substring(1, editExistFile.length) :
              editExistFile;
          versions.push(editExistFile);
        }
      }
    }
    if (versions.length === 0) {
      return null;
    }
    let downloadedBinary = new DownloadedBinary(binary);
    downloadedBinary.versions = versions;
    return downloadedBinary;
  }