private SendGridEmailMessage CreateMessage(string subject = null, params string[] receivers)
{
var customReceivers = receivers ?? Enumerable.Empty <string>();
var emailReceivers = (_configuration.DefaultReceivers.Any()
? _configuration.DefaultReceivers.Union(customReceivers)
: customReceivers).ToList();
if (!emailReceivers.Any())
{
throw new ArgumentException("Email message receivers have not been defined.", nameof(emailReceivers));
}
var emailSubject = string.IsNullOrWhiteSpace(subject) ? _configuration.DefaultSubject : subject;
emailReceivers.ValidateEmails(nameof(receivers));
var emailMessage = new SendGridEmailMessage
{
Subject = emailSubject,
From = new SendGridEmailMessage.Person
{
Email = _configuration.Sender
}
};
emailMessage.Personalizations.Add(new SendGridEmailMessage.Personalization
{
To = emailReceivers.Select(x => new SendGridEmailMessage.Person
{
Email = x
}).ToList()
});
return(emailMessage);
}
public async Task SendMessageAsync(string apiKey, SendGridEmailMessage message)
{
_httpClient.DefaultRequestHeaders.Remove("Authorization");
_httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {apiKey}");
var payload = JsonConvert.SerializeObject(message);
var content = new StringContent(payload, Encoding.UTF8, "application/json");
await _httpClient.PostAsync("mail/send", content);
}
private async Task SendMessageAsync(SendGridEmailMessage message)
{
var emailSender = _configuration.EmailSenderProvider();
await emailSender.SendMessageAsync(_configuration.ApiKey, message);
}