private async Task TriggerEmailAction(ExecutionContext context, ActionEvent actionInfo, RuleAction action)
{
var hasRecipients = action.Parameters.TryGetValue("Recipients", out object recipientsResult);
if (!hasRecipients)
{
throw new ArgumentException("The given email action has no listed recipients");
}
var recipients = new List <string>();
try
{
var recipientsJArray = (JArray)recipientsResult;
recipients = recipientsJArray.Select(token => token.Value <string>()).ToList();
}
catch (InvalidCastException ice)
{
throw new ArgumentException("The given email action did not have a 'Recipients' parameter that could be converted to a list of strings", ice);
}
if (recipients.Count == 0)
{
throw new ArgumentException("The given email action did not contain any recipients");
}
action.Parameters.TryGetValue("Subject", out object subject);
action.Parameters.TryGetValue("Notes", out object notes);
var timeReceived = new DateTime(1970, 1, 1).AddMilliseconds(double.Parse(actionInfo.DeviceMsgReceived));
var messageInfo = new EmailFormatModel
{
Recipients = recipients,
Subject = (string)subject,
DeviceId = actionInfo.DeviceId,
Description = actionInfo.RuleDescription,
Severity = actionInfo.RuleSeverity,
Time = timeReceived.ToString(),
Notes = (string)notes,
};
var message = EmailMessageHelper.GenerateAlertEmailMessage(context, messageInfo);
await this.EmailClient.SendEmailAsync(message);
}
public static SendGridMessage GenerateAlertEmailMessage(ExecutionContext context, EmailFormatModel messageInfo)
{
var msg = new SendGridMessage();
msg.SetFrom(new EmailAddress(EmailFrom, EmailFromMessage));
msg.AddTos(messageInfo.Recipients.Select(email => new EmailAddress(email)).ToList());
if (!string.IsNullOrEmpty(messageInfo.Subject))
{
msg.SetSubject($"{EmailSubjectPrefix}: {messageInfo.Subject}");
}
else
{
msg.SetSubject(EmailSubjectPrefix);
}
Func <IDictionary <string, object>, string> template;
string templateFilePath = Path.Combine(context.FunctionAppDirectory, "Files", "AlertEmail.html");
using (Stream stream = File.OpenRead(templateFilePath))
using (StreamReader reader = new StreamReader(stream))
{
template = Mustachio.Parser.Parse(reader.ReadToEnd());
}
// Set the model with the necessary template format values
dynamic model = new ExpandoObject();
model.DeviceId = messageInfo.DeviceId;
model.Description = messageInfo.Description;
model.Severity = messageInfo.Severity;
model.Time = messageInfo.Time;
model.Notes = messageInfo.Notes;
msg.AddContent(MimeType.Html, template(model));
return(msg);
}