Helper function to send Mad Mimi promotional email

madmimi.cshtml

@using System.Text
@using System.Reflection
@functions {
    
    private const string Username = "your email";
    private const string APIKey = "your api-key";
    private const string Sender = "your email";

    public static string ToYaml(object o) 
    {
        // usage ToYaml(new {key1="name", key2="name"})
        // only one dimensional
        
        var yaml ="--- \n";
        
        var properties = o.GetType().GetProperties();
        foreach (PropertyInfo prop in properties)
        {
            yaml += prop.Name + ": " + prop.GetValue(o, null).ToString() +"\n";
        }
        return yaml;
    }

    private static string Post(string url, string properties)
    {
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
        request.Method = "POST";
        
        byte[] byteArray = Encoding.UTF8.GetBytes(properties);
        
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = byteArray.Length;
        Stream dataStream = request.GetRequestStream();
        dataStream.Write(byteArray, 0, byteArray.Length);
        dataStream.Close();
        
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        string message="";
        if (HttpStatusCode.OK == response.StatusCode)
        {
            dataStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(dataStream);
            var ReadToEnd= reader.ReadToEnd();    
            response.Close();
            
            string statUrl = String.Format("https://madmimi.com/mailers/status/{0}?username={1}&api_key={2}", ReadToEnd, Username, APIKey);
            return statUrl;    
        }
        else
        {
            return "Error: " + response.StatusCode.ToString();
        }
        
    }
}

}

@helper SendPromotionToList(string promotionName, string listName, string subject= "", object keyValuePair=null, string bcc="")
{
  var url = "https://api.madmimi.com/mailer/to_list";   
  
  var s = "username=" + Username + "&";
  s += "api_key=" + APIKey + "&";
  s += "promotion_name=" + promotionName + "&";
  s += "list_name=" + listName + "&";
  if (subject!="") { s += "subject=" + subject + "&"; }
  s += "from=" + Sender + "&"; 
  if (bcc!="") {s += "bcc=" + bcc + "&";}
  if (keyValuePair!=null) { s += "body=" + ToYaml(keyValuePair); }
   
  Post(url, s);
    
}
@helper SendPromotionToRecipient(string promotionName, string recipients, string subject= "", object keyValuePair=null, string bcc="")
{
  var url = "https://api.madmimi.com/mailer";   
  
  var s = "username=" + Username + "&";
  s += "api_key=" + APIKey + "&";
  s += "promotion_name=" + promotionName + "&";
  s += "recipients=" + recipients + "&";    
  if (subject!="") { s += "subject=" + subject + "&"; }
  s += "from=" + Sender + "&"; 
  if (bcc!="") {s += "bcc=" + bcc + "&";}
  if (keyValuePair!=null) { s += "body=" + ToYaml(keyValuePair); }
   
  Post(url, s);
    
}