public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest httpRequest,
ExecutionContext executionContext
)
{
_genericConfig = StartupHelper.GetConfig(executionContext);
string requestBody = await new StreamReader(httpRequest.Body).ReadToEndAsync();
dynamic requestObject = JsonConvert.DeserializeObject(requestBody);
// connect to Twilio
TwilioClient.Init(_genericConfig.TwilioAccountSid, _genericConfig.TwilioAuthToken);
// query twilio api ... and get distinct phone numbers of whatsapp users subscribed to chat
ResourceSet <MessageResource> messageCollection = await MessageResource.ReadAsync(to : _genericConfig.TwilioWhatsAppPhoneNumber);
IEnumerable <PhoneNumber> distinctPhoneNumbers = messageCollection.GroupBy(a => a.From.ToString()).Select(b => b.FirstOrDefault().From);
foreach (var phoneNumber in distinctPhoneNumbers)
{
if (phoneNumber.ToString() == requestObject.User.ToString())
{
// if message originated from whatsapp, don't send a copy straight back to sender
continue;
}
// send message to whatsapp user
var message = MessageResource.Create(
from: new Twilio.Types.PhoneNumber(_genericConfig.TwilioWhatsAppPhoneNumber),
body: $"{requestObject.User} : {requestObject.Message}",
to: phoneNumber
);
}
return((ActionResult) new OkResult());
}