public async Task <string> InsertEmailAsync(InsertEmailModel emailModel, ILambdaContext context)
{
var s3Client = new AmazonS3Client();
var sqsClient = new AmazonSQSClient();
var insertEmailService = new InsertEmailService(s3Client, sqsClient);
return(await insertEmailService.InsertEmailAsync(emailModel));
}
private static SendRawEmailRequest CreateRawEmailModel(InsertEmailModel insertEmailModel)
{
using (var memoryStream = new MemoryStream())
{
var message = GetMimeMessageFromEmailModel(insertEmailModel);
message.WriteTo(memoryStream);
return(new SendRawEmailRequest(new RawMessage(memoryStream)));
}
}
public async Task <string> InsertEmailAsync(InsertEmailModel emailModel)
{
var emailStorageId = Guid.NewGuid().ToString();
await UploadEmailToS3(emailStorageId, emailModel);
await _sqsClient.SendMessageAsync(
EnvironmentVariables.MailQueue,
JsonConvert.SerializeObject(emailStorageId)
);
return(emailStorageId);
}
public void Handle(LoanHasBeenPaidOffEvent @event)
{
// Some logic (maybe business as well) related with actions when customer has taken loan
var mailBody = $"Hi, {@event.CustomerFirstName}\n\nYour loan for {@event.LoanAmount} {@event.LoanCurrency} has been paid off.";
var insertMailModel = new InsertEmailModel
{
To = @event.CustomerMailAddress,
Subject = MailSubject,
Body = mailBody
};
_emailClient.InsertEmail(insertMailModel);
}
public async Task <string> InsertEmailAsync(InsertEmailModel insertEmailModelModel)
{
insertEmailModelModel.From = _emailClientConfig.FromMailAddress;
var lambdaRequest = new InvokeRequest
{
FunctionName = _insertEmailLambdaName,
Payload = JsonConvert.SerializeObject(insertEmailModelModel)
};
var invokeResult = await _lambdaClient.Value.InvokeAsync(lambdaRequest);
CheckLambdaResult(invokeResult);
return(invokeResult.Payload.Deserialize <string>());
}
private static MimeMessage GetMimeMessageFromEmailModel(InsertEmailModel mailTask)
{
var message = new MimeMessage {
Subject = mailTask.Subject
};
message.From.Add(new MailboxAddress(mailTask.From));
message.To.Add(new MailboxAddress(String.Empty, mailTask.To));
var body = new BodyBuilder {
HtmlBody = mailTask.Body
};
message.Body = body.ToMessageBody();
return(message);
}
private async Task UploadEmailToS3(string emailStorageId, InsertEmailModel emailModel)
{
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(emailModel))))
{
var s3PutRequest = new PutObjectRequest
{
BucketName = EnvironmentVariables.MailSendingBucket,
Key = emailStorageId,
InputStream = stream
};
var result = await _s3Client.PutObjectAsync(s3PutRequest);
if (result.HttpStatusCode != HttpStatusCode.OK)
{
throw new Exception(
"An error occured during putting S3 object."
+ $"Received status code {(int) result.HttpStatusCode} in response"
);
}
}
}
public string InsertEmail(InsertEmailModel insertEmailModelModel) => InsertEmailAsync(insertEmailModelModel).GetAwaiter().GetResult();
