C#でRCSとSendGridを活用したプロモーションキャンペーンを作成する方法

mkdir RcsEmailSender
cd RcsEmailSender
dotnet new console
dotnet new sln
dotnet sln add RcsEmailSender.csproj

dotnet add package SendGrid
dotnet add package Twilio
dotnet add package Microsoft.Extensions.Configuration
dotnet add package Microsoft.Extensions.Configuration.Json
dotnet add package Microsoft.Extensions.Configuration.EnvironmentVariables

{
 "MessageServices": {
   "Twilio": {
     "AccountSid": "YOUR_TWILIO_ACCOUNT_SID",
     "AuthToken": "YOUR_TWILIO_AUTH_TOKEN",
     "FromNumber": "+15551234567"
   },
   "SendGrid": {
     "ApiKey": "YOUR_SENDGRID_API_KEY",
     "FromEmail": "no-reply@example.com",
     "FromName": "Example Sender",
     "TemplateId": "d-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
   },
   "Recipients": {
     "PhoneNumber": "+15557654321",
     "Email": "recipient@example.com"
   }
 }
}

using System;
namespace RcsEmailSender
{
   // Configuration class for storing API keys and credentials
   public class MessageServiceConfig
   {
       public string TwilioAccountSid { get; set; } = string.Empty;
       public string TwilioAuthToken { get; set; } = string.Empty;
       public string TwilioFromNumber { get; set; } = string.Empty;
       public string SendGridApiKey { get; set; } = string.Empty;
       public string SendGridFromEmail { get; set; } = string.Empty;
       public string SendGridFromName { get; set; } = string.Empty;
       public string SendGridTemplateId { get; set; } = string.Empty;
       public string RecipientPhoneNumber { get; set; } = string.Empty;
       public string RecipientEmail { get; set; } = string.Empty;
   }
   // Consolidated message model for both RCS and Email
   public class MessageContent
   {
       public string Title { get; set; } = string.Empty;
       public string Body { get; set; } = string.Empty;
       public string ImageUrl { get; set; } = string.Empty;
       public string ButtonText { get; set; } = string.Empty;
       public string ButtonUrl { get; set; } = string.Empty;
   }
}

using Microsoft.Extensions.Configuration;
using SendGrid;
using SendGrid.Helpers.Mail;
using Twilio;
using Twilio.Rest.Api.V2010.Account;
using Twilio.Types;
namespace RcsEmailSender
{
   class Program
   {
       static async Task Main(string[] args)
       {
           // Set up configuration system
                var configuration = new ConfigurationBuilder()
               .SetBasePath(Directory.GetCurrentDirectory())
               .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
               //.AddEnvironmentVariables("RCS_EMAIL_") // Allows overriding with environment variables prefixed with RCS_EMAIL_
               .Build();
           // Load config from configuration
           var config = new MessageServiceConfig
           {
               TwilioAccountSid = configuration["MessageServices:Twilio:AccountSid"] ?? string.Empty,
               TwilioAuthToken = configuration["MessageServices:Twilio:AuthToken"] ?? string.Empty,
               TwilioFromNumber = configuration["MessageServices:Twilio:FromNumber"] ?? string.Empty,
               SendGridApiKey = configuration["MessageServices:SendGrid:ApiKey"] ?? string.Empty,
               SendGridFromEmail = configuration["MessageServices:SendGrid:FromEmail"] ?? string.Empty,
               SendGridFromName = configuration["MessageServices:SendGrid:FromName"] ?? string.Empty,
               SendGridTemplateId = configuration["MessageServices:SendGrid:TemplateId"] ?? string.Empty,
               RecipientPhoneNumber = configuration["MessageServices:Recipients:PhoneNumber"] ?? string.Empty,
               RecipientEmail = configuration["MessageServices:Recipients:Email"] ?? string.Empty
           };

var messageContent = new MessageContent
           {
               Title = "Owl Air Elite Status",
               Body = "Congratulations! You've reached Elite status. Add code ELITE10 for 10% off your next flight. Book at twilio.com or call +15551234567",
               ImageUrl = "https://rcs-4036.twil.io/image.png", // Image URL for testing
               ButtonText = "Book Now",
               ButtonUrl = "https://twilio.com"
           };

try
           {
               //Send RCS message
               var rcsResult = await SendRcsMessage(config, messageContent);
               Console.WriteLine($"RCS message sent: {rcsResult}");
               // Send Email
               var emailResult = await SendEmailWithDynamicTemplate(config, messageContent);
               Console.WriteLine($"Email sent: {emailResult}");
           }
           catch (Exception ex)
           {
               Console.WriteLine($"Error sending messages: {ex.Message}");
           }
       }

static async Task<string> SendRcsMessage(MessageServiceConfig config, MessageContent content)
       {
           TwilioClient.Init(config.TwilioAccountSid, config.TwilioAuthToken);
           var message = await MessageResource.CreateAsync(
               body: $"{content.Title}\n\n{content.Body}\n\nClick here: {content.ButtonUrl}",
               from: new PhoneNumber(config.TwilioFromNumber),
               to: new PhoneNumber(config.RecipientPhoneNumber),
               mediaUrl: new List<Uri> { new Uri(content.ImageUrl) } 
           );
           return message.Sid;
       }
       // Method to send email using SendGrid with dynamic template
       static async Task<bool> SendEmailWithDynamicTemplate(MessageServiceConfig config, MessageContent content)
       {
           // Initialize SendGrid client
           var client = new SendGridClient(config.SendGridApiKey);
           var from = new EmailAddress(config.SendGridFromEmail, config.SendGridFromName);
           var to = new EmailAddress(config.RecipientEmail);
           var msg = new SendGridMessage();
           msg.SetFrom(from);
           msg.AddTo(to);

           msg.SetTemplateId(config.SendGridTemplateId);
           // Define template data with proper naming that matches the SendGrid template
           var templateData = new
           {
               subject = content.Title,
               preheader = "Special offer inside!", // Optional preheader text
               title = content.Title,
               body_text = content.Body,
               image_url = content.ImageUrl,
               button_text = content.ButtonText,
               button_url = content.ButtonUrl,
               sender_name = config.SendGridFromName
           };
           msg.SetTemplateData(templateData);
           // Send the message
           var response = await client.SendEmailAsync(msg);
           return response.IsSuccessStatusCode;
       }
   }
}

dotnet run