private async Task <EmailTemplateInfo> GetTemplateAsync(EmailMessageParams args)
{
var response = new EmailTemplateInfo();
var application = await GetApplicationAsync(args.ApplicationId);
if (application == null)
{
return(response);
}
response.ApplicationName = application.Name;
response.SenderAddress = application.SenderAddress;
response.SenderName = application.SenderName;
var transports = (await GetTransportsAsync(args.ApplicationId)).ToArray();
response.TransportQueue = new Queue <ITransportDefinition>(transports);
if (args.TemplateId.HasValue)
{
response.Template = await GetTemplateAsync(args.TemplateId.Value, args.GetCulture());
}
else
{
response.Template = new EmailTemplate(args.Subject, args.GetBody(), args.GetCulture());
}
return(response);
}
public async Task <SentEmailInfo> TrySendEmailAsync(EmailMessageParams args)
{
EmailTemplate email;
var templateInfo = await GetTemplateAsync(args);
if (templateInfo.ApplicationName == null)
{
throw new InvalidOperationException($"The application ID `{args.ApplicationId}` does not match any records in the database");
}
if (templateInfo.Template == null)
{
if (args.TemplateId.HasValue)
{
throw new InvalidOperationException($"Could not find a template matching {args.TemplateId}");
}
else
{
throw new InvalidOperationException("No subject and body were supplied, and no template ID was provided");
}
}
// note that Data is a dictionary; if it has no values, we can assume that it's empty
// and thus skip the transformation
if (args.Data?.Count > 0)
{
email = await Transformer.TransformTemplateAsync(templateInfo.Template, args.Data, args.GetCulture());
}
else
{
email = templateInfo.Template;
}
var senderParams = new SenderParams
{
To = args.To,
CC = args.CC,
Bcc = args.Bcc,
Subject = email.Subject,
Body = email.Body,
SenderName = templateInfo.SenderName,
SenderAddress = templateInfo.SenderAddress
};
// we can pre-fill these log fields
var log = new SentEmailInfo
{
ApplicationName = templateInfo.ApplicationName,
TemplateName = templateInfo.Template.Name,
TemplateId = args.TemplateId,
Subject = senderParams.Subject,
LogLevel = args.LogLevel,
Recipients = senderParams.GetRecipients()
};
var success = false;
while (!success && templateInfo.TransportQueue.Any())
{
var transportInfo = templateInfo.TransportQueue.Dequeue();
var transport = _transportFactory.CreateTransport(transportInfo);
if (await transport.SendAsync(senderParams))
{
// we can fill this information in now that we know it
log.ProcessedUtc = DateTime.UtcNow;
log.Transport = transportInfo;
success = true;
}
}
if (!success)
{
throw new Exception("Could not send email with any of the configured transports");
}
return(log);
}
public static string ToJson(EmailMessageParams message, Formatting formatting = Formatting.Indented)
{
return(JsonConvert.SerializeObject(message, formatting));
}