Refactor: Envio de email via API ao invés de SMTP (#8)

Author: Xcode-sketcher

ControleContatos/Program.cs

@@ -90,7 +90,8 @@
 
 builder.Services.Configure<EmailSettings>(
     builder.Configuration.GetSection(EmailSettings.SectionName));
-builder.Services.AddTransient<IEmailSender, EmailSenderSmtp>();
+builder.Services.AddHttpClient("brevo", c => c.BaseAddress = new Uri("https://api.brevo.com/"));
+builder.Services.AddTransient<IEmailSender, BrevoEmailSender>();
 
 builder.Services.AddSignalR();
 

ControleContatos/Services/BrevoEmailSender.cs

@@ -0,0 +1,69 @@
+using System.Text;
+using System.Text.Json;
+
+namespace ControleContatos.Services;
+
+public class BrevoEmailSender : IEmailSender
+{
+    private readonly IHttpClientFactory _httpClientFactory;
+    private readonly IConfiguration _config;
+    private readonly ILogger<BrevoEmailSender> _logger;
+    private readonly IWebHostEnvironment _env;
+
+    public BrevoEmailSender(
+        IHttpClientFactory httpClientFactory,
+        IConfiguration config,
+        ILogger<BrevoEmailSender> logger,
+        IWebHostEnvironment env)
+    {
+        _httpClientFactory = httpClientFactory;
+        _config = config;
+        _logger = logger;
+        _env = env;
+    }
+
+    public async Task SendEmailAsync(string toEmail, string subject, string htmlBody)
+    {
+        var apiKey = _config["Bravo:APIKey"] ?? "";
+        var fromEmail = _config["Bravo:From"] ?? _config["EmailSettings:FromEmail"] ?? "";
+        var fromName = _config["EmailSettings:FromName"] ?? "ControleContatos";
+
+        if (string.IsNullOrWhiteSpace(apiKey))
+        {
+            _logger.LogWarning("[Brevo] API Key não configurada. E-mail NÃO enviado. To={To}, Subject={Subject}", toEmail, subject);
+            if (_env.IsDevelopment())
+                _logger.LogInformation("[Brevo][DEV] Conteúdo:\nPara: {To}\nAssunto: {Subject}\nCorpo:\n{Body}", toEmail, subject, htmlBody);
+            return;
+        }
+
+        var payload = new
+        {
+            sender = new { name = fromName, email = fromEmail },
+            to = new[] { new { email = toEmail } },
+            subject,
+            htmlContent = htmlBody
+        };
+
+        var json = JsonSerializer.Serialize(payload);
+        var content = new StringContent(json, Encoding.UTF8, "application/json");
+
+        var client = _httpClientFactory.CreateClient("brevo");
+        client.DefaultRequestHeaders.Clear();
+        client.DefaultRequestHeaders.Add("api-key", apiKey);
+        client.DefaultRequestHeaders.Add("accept", "application/json");
+
+        var response = await client.PostAsync("v3/smtp/email", content);
+        var responseBody = await response.Content.ReadAsStringAsync();
+
+        if (response.IsSuccessStatusCode)
+        {
+            _logger.LogInformation("[Brevo] E-mail enviado para {To} — Assunto: {Subject}", toEmail, subject);
+        }
+        else
+        {
+            _logger.LogError("[Brevo] Falha ao enviar e-mail para {To}. Status: {Status}, Resposta: {Body}", toEmail, response.StatusCode, responseBody);
+            throw new HttpRequestException($"Brevo API retornou {response.StatusCode}: {responseBody}");
+        }
+    }
+}
+