feat: added bcc only emails to smtp

src/Utopia/Messaging/Adapter/Email/SMTP.php

@@ -27,7 +27,7 @@ public function __construct(
         private string $password = '',
         private string $smtpSecure = '',
         private bool $smtpAutoTLS = false,
-        private string $xMailer = ''
+        private string $xMailer = '',
     ) {
         if (!\in_array($this->smtpSecure, ['', 'ssl', 'tls'])) {
             throw new \InvalidArgumentException('Invalid SMTP secure prefix. Must be "", "ssl" or "tls"');
@@ -72,6 +72,14 @@ protected function process(EmailMessage $message): array
         $mail->AltBody = \strip_tags($mail->AltBody);
         $mail->AltBody = \trim($mail->AltBody);
 
+        if (empty($message->getTo())) {
+            if (empty($message->getBCC()) && empty($message->getDefaultRecipient())) {
+                throw new \Exception('Email requires either "to" recipients or both BCC and a default recipient configurations');
+            }
+
+            $mail->addAddress($message->getDefaultRecipient());
+        }
+
         foreach ($message->getTo() as $to) {
             $mail->addAddress($to);
         }
@@ -111,7 +119,8 @@ protected function process(EmailMessage $message): array
         $sent = $mail->send();
 
         if ($sent) {
-            $response->setDeliveredTo(\count($message->getTo()));
+            $totalDelivered = \count($message->getTo()) + \count($message->getCC() ?: []) + \count($message->getBCC() ?: []);
+            $response->setDeliveredTo($totalDelivered);
         }
 
         foreach ($message->getTo() as $to) {
@@ -122,6 +131,22 @@ protected function process(EmailMessage $message): array
             $response->addResult($to, $sent ? '' : $error);
         }
 
+        foreach ($message->getCC() as $cc) {
+            $error = empty($mail->ErrorInfo)
+                ? 'Unknown error'
+                : $mail->ErrorInfo;
+
+            $response->addResult($cc['email'], $sent ? '' : $error);
+        }
+
+        foreach ($message->getBCC() as $bcc) {
+            $error = empty($mail->ErrorInfo)
+                ? 'Unknown error'
+                : $mail->ErrorInfo;
+
+            $response->addResult($bcc['email'], $sent ? '' : $error);
+        }
+
         return $response->toArray();
     }
 }

src/Utopia/Messaging/Messages/Email.php

@@ -19,6 +19,7 @@ class Email implements Message
      * @param  string|null  $replyToEmail The email address of the reply to.
      * @param  array<Attachment>|null  $attachments The attachments of the email.
      * @param  bool  $html Whether the message is HTML or not.
+     * @param  string|null  $defaultRecipient The default recipient of the email.
      *
      * @throws \InvalidArgumentException
      */
@@ -33,7 +34,8 @@ public function __construct(
         private ?array $cc = null,
         private ?array $bcc = null,
         private ?array $attachments = null,
-        private bool $html = false
+        private bool $html = false,
+        private ?string $defaultRecipient = null
     ) {
         if (\is_null($this->replyToName)) {
             $this->replyToName = $this->fromName;
@@ -126,4 +128,9 @@ public function isHtml(): bool
     {
         return $this->html;
     }
+
+    public function getDefaultRecipient(): ?string
+    {
+        return $this->defaultRecipient;
+    }
 }

tests/Messaging/Adapter/Email/SMTPTest.php

@@ -54,7 +54,6 @@ public function testSendEmailWithAttachment(): void
         $fromName = 'Test Sender';
         $fromEmail = 'sender@localhost.test';
 
-
         $message = new Email(
             to: [$to],
             subject: $subject,
@@ -78,4 +77,43 @@ public function testSendEmailWithAttachment(): void
         $this->assertEquals($subject, $lastEmail['subject']);
         $this->assertEquals($content, \trim($lastEmail['text']));
     }
+
+    public function testSendEmailOnlyBCC(): void
+    {
+        $sender = new SMTP(
+            host: 'maildev',
+            port: 1025,
+        );
+
+        $defaultRecipient = 'tester@localhost.test';
+        $subject = 'Test Subject';
+        $content = 'Test Content';
+        $fromName = 'Test Sender';
+        $fromEmail = 'sender@localhost.test';
+        $bcc = [
+            [
+                'email' => 'tester2@localhost.test',
+                'name' => 'Test Recipient 2',
+            ],
+        ];
+
+        $message = new Email(
+            to: [],
+            subject: $subject,
+            content: $content,
+            fromName: $fromName,
+            fromEmail: $fromEmail,
+            bcc: $bcc,
+            defaultRecipient: $defaultRecipient,
+        );
+
+        $response = $sender->send($message);
+
+        $lastEmail = $this->getLastEmail();
+
+        $this->assertResponse($response);
+        $this->assertEquals($fromEmail, $lastEmail['from'][0]['address']);
+        $this->assertEquals($subject, $lastEmail['subject']);
+        $this->assertEquals($content, \trim($lastEmail['text']));
+    }
 }