Notes

public class SMSService : ISMSService
{
private readonly RestClient _client;
private readonly IConfiguration _configuration;

public SMSService(IConfiguration configuration)
{
_configuration = configuration;
_client = new RestClient(configuration["SMSApi:Url"]);
}

public async Task<SMSResponse> SendSms(string phoneNumber, string textMessage)
{
var controlId = GenerateControlId();

// Create the XML structure as per the example
var requestBody = new XElement("request",
new XElement("head",
new XElement("operation", "submit"),
new XElement("login", _configuration["SMSApi:Username"]), // Use dynamic username
new XElement("password", _configuration["SMSApi:Password"]), // Use dynamic password
new XElement("title", "Smart Elect"), // Dynamic sender name
new XElement("bulkmessage", textMessage), // Set text message
new XElement("scheduled", "now"), // Always set to "now"
new XElement("isbulk", "false"), // Always set to "false"
new XElement("controlid", controlId) // Unique controlId
),
new XElement("body",
new XElement("msisdn", phoneNumber), // Set phone number
new XElement("message", textMessage) // Set message
)
);

var request = new RestRequest();
request.AddHeader("Content-Type", "application/xml");
request.AddParameter("application/xml", requestBody.ToString(), ParameterType.RequestBody);

RestResponse response = await _client.ExecuteAsync(request, Method.Post);

if (!response.IsSuccessful)
{
throw new Exception($"Failed to send SMS. Status code: {response.StatusCode}, Message: {response.ErrorMessage}");
}

var responseData = XDocument.Parse(response.Content);
var responseCode = responseData.Root.Element("head").Element("responsecode").Value;

if (responseCode == "000")
{
return new SMSResponse
{
Message = "SMS sent successfully",
TransId = responseData.Root.Element("body").Element("taskid").Value
};
}
else
{
return new SMSResponse
{
Message = "Failed to send SMS",
ErrorCode = responseCode
};
}
}

private string GenerateControlId()
{
var ticks = DateTime.Now.Ticks;
var random = new Random();
var randomNumber = random.Next(1000, 9999);
return $"{ticks}{randomNumber}"; // Unique controlid as numbers
}
}