private string ConvertToConnectionString()

in MySQL.Data/src/X/XDevAPI/BaseSession.cs [624:688]
59 lines of code
28 McCabe index (conditional complexity)

    private string ConvertToConnectionString(Uri uri, string unixSocketPath, bool parseServerAsUnixSocket, bool isDnsSrvScheme)
    {
      List<string> connectionParts = new List<string>();

      if (string.IsNullOrWhiteSpace(uri.Host))
        throw new UriFormatException(ResourcesX.InvalidUriData + "host");
      connectionParts.Add("server=" + (parseServerAsUnixSocket ?
        NormalizeUnixSocket(unixSocketPath) :
        uri.Host));
      connectionParts.Add("port=" + (uri.Port == -1 ? 33060 : uri.Port));
      _isDefaultPort = uri.IsDefaultPort;
      if (uri.Scheme == DNS_SRV_URI_SCHEME)
        connectionParts.Add("dns-srv=true");

      if (!string.IsNullOrWhiteSpace(uri.UserInfo))
      {
        string[] userData = uri.UserInfo.Split(':');
        if (userData.Length > 2)
          throw new UriFormatException(ResourcesX.InvalidUriData + "user info");
        connectionParts.Add("uid=" + System.Uri.UnescapeDataString(userData[0]));
        if (userData.Length > 1)
          connectionParts.Add("password=" + System.Uri.UnescapeDataString(userData[1]));
      }
      if (uri.Segments.Length > 2)
        throw new UriFormatException(ResourcesX.InvalidUriData + "segments");
      if (uri.Segments.Length > 1)
      {
        connectionParts.Add("database=" + System.Uri.UnescapeDataString(uri.Segments[1]));
      }
      if (!string.IsNullOrWhiteSpace(uri.Query))
      {
        string[] queries = System.Uri.UnescapeDataString(uri.Query).Substring(1).Split(new char[] { '&' }, StringSplitOptions.RemoveEmptyEntries);
        foreach (string query in queries)
        {
          string[] keyValue = query.Replace(";", string.Empty).Split('=');
          string part;
          var connectionAttributesOption = MySqlXConnectionStringBuilder.Options.Options.First(item => item.Keyword == CONNECTION_ATTRIBUTES_CONNECTION_OPTION_KEYWORD);
          var dnsSrvOption = MySqlXConnectionStringBuilder.Options.Options.First(item => item.Keyword == DNS_SRV_CONNECTION_OPTION_KEYWORD);

          if (!((connectionAttributesOption.Keyword == keyValue[0]) || connectionAttributesOption.Synonyms.Contains(keyValue[0]) && keyValue.Count() > 2))
          {
            if (keyValue.Length > 2)
              throw new ArgumentException(ResourcesX.InvalidUriQuery + ":" + keyValue[0]);
            var connecttimeoutOption = MySqlXConnectionStringBuilder.Options.Options.First(item => item.Keyword == CONNECT_TIMEOUT_CONNECTION_OPTION_KEYWORD);
            if ((connecttimeoutOption.Keyword == keyValue[0] || connecttimeoutOption.Synonyms.Contains(keyValue[0])) &&
              String.IsNullOrWhiteSpace(keyValue[1]))
              throw new FormatException(ResourcesX.InvalidConnectionTimeoutValue);
            part = keyValue[0] + "=" + (keyValue.Length == 2 ? keyValue[1] : "true").Replace("(", string.Empty).Replace(")", string.Empty);
          }
          else if (keyValue[1] == string.Empty)
            throw new MySqlException(ResourcesX.InvalidUriQuery + ": " + keyValue[0]);
          else
            part = keyValue[0] + "=" + query.Replace(keyValue[0] + "=", string.Empty);

          if (isDnsSrvScheme && (dnsSrvOption.Keyword == keyValue[0] || dnsSrvOption.Synonyms.Contains(keyValue[0])) && !Convert.ToBoolean(keyValue[1]))
            throw new ArgumentException(string.Format(ResourcesX.DnsSrvConflictingOptions, dnsSrvOption.Keyword));
          else if (isDnsSrvScheme && (dnsSrvOption.Keyword == keyValue[0] || dnsSrvOption.Synonyms.Contains(keyValue[0])))
            continue;

          connectionParts.Add(part);
        }
      }

      return string.Join("; ", connectionParts);
    }