internal void AnalyzeConnectionString()

in MySQL.Data/src/MySqlBaseConnectionStringBuilder.cs [449:488]
32 lines of code
25 McCabe index (conditional complexity)

    internal void AnalyzeConnectionString(string connectionString, bool isXProtocol, bool isDefaultPort = true, bool isAnalyzed = false)
    {
      if (!isAnalyzed && !string.IsNullOrWhiteSpace(connectionString))
      {
        string[] queries = connectionString.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
        bool isDnsSrv = false;

        if (queries.FirstOrDefault(q => q.ToLowerInvariant().Contains("dns-srv=true")) != null
              || queries.FirstOrDefault(q => q.ToLowerInvariant().Contains("dnssrv=true")) != null)
          isDnsSrv = true;

        foreach (string query in queries)
        {
          string[] keyValue = query.Split('=');
          if (keyValue.Length % 2 != 0)
            continue;

          var keyword = keyValue[0].ToLowerInvariant().Trim();
          var value = query.Contains(",") ? query.Replace(keyword, "") : keyValue[1].ToLowerInvariant();
          MySqlConnectionStringOption option = Options.Options.Where(o => o.Keyword == keyword || (o.Synonyms != null && o.Synonyms.Contains(keyword))).FirstOrDefault();

          // DNS SRV option can't be used if Port, Unix Socket or Multihost are specified
          if (isDnsSrv)
          {
            if (option.Keyword == "port" && !isDefaultPort)
              throw new ArgumentException(Resources.DnsSrvInvalidConnOptionPort);
            if (option.Keyword == "server" && ((value.Contains("address") && value.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).Length > 2) || value.Contains(",")))
              throw new ArgumentException(Resources.DnsSrvInvalidConnOptionMultihost);
            if (option.Keyword == "protocol" && (value.ToLowerInvariant().Contains("unix") || value.ToLowerInvariant().Contains("unixsocket")))
              throw new ArgumentException(Resources.DnsSrvInvalidConnOptionUnixSocket);
          }

          if (option == null) continue;

          // Preferred is not allowed for the X Protocol.
          if (isXProtocol && option.Keyword == "sslmode" && (value == "preferred" || value == "prefered"))
            throw new ArgumentException(string.Format(Resources.InvalidSslMode, keyValue[1]));
        }
      }
    }