Feat 6396 Postmark Messaging Adapter

src/Utopia/Messaging/Adapters/Email/Postmark.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace Utopia\Messaging\Adapters\Email;
+
+use Utopia\Messaging\Adapters\Email as EmailAdapter;
+use Utopia\Messaging\Messages\Email;
+
+class Postmark extends EmailAdapter
+{
+    /**
+     * @param  string  $apiKey Your Postmark API key to authenticate with the API.
+     */
+    public function __construct(
+        private string $apiKey
+    ) {
+    }
+
+    /**
+     * Get adapter name.
+     *
+     * @return string
+     */
+    public function getName(): string
+    {
+        return 'Postmark';
+    }
+
+    /**
+     * Get adapter description.
+     *
+     * @see https://postmarkapp.com/developer/api/email-api#send-batch-emails For information about batch email limit.
+     * 
+     * @return int
+     */
+    public function getMaxMessagesPerRequest(): int
+    {
+        return 50;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @throws \Exception
+     */
+    protected function process(Email $message): string
+    {
+        $bodyKey = $message->isHtml() ? 'HtmlBody' : 'TextBody';
+
+        $response = $this->request(
+            method: 'POST',
+            url: 'https://api.postmarkapp.com/email',
+            headers: [
+                'Accept: application/json',
+                'Content-Type: application/json',
+                'X-Postmark-Server-Token: '.$this->apiKey,
+            ],
+            body: \json_encode([
+                'To' => \implode(',', $message->getTo()),
+                'From' => $message->getFrom(),
+                'Subject' => $message->getSubject(),
+                $bodyKey => $message->getContent(),
+            ]),
+        );
+
+        return $response;
+    }
+}

tests/e2e/Email/PostmarkTest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Tests\E2E;
+
+use Utopia\Messaging\Adapters\Email\Postmark;
+use Utopia\Messaging\Messages\Email;
+
+class PostmarkTest extends Base
+{
+    /**
+     * @throws \Exception
+     */
+    public function testSendPlainTextEmail()
+    {
+        $this->markTestSkipped('Postmark credentials not set.');
+
+        $key = getenv('POSTMARK_API_KEY');
+        $sender = new Postmark($key);
+
+        $to = getenv('TEST_EMAIL');
+        $subject = 'Test Subject';
+        $content = 'Test Content';
+        $from = getenv('TEST_FROM_EMAIL');
+
+        $message = new Email(
+            to: [$to],
+            from: $from,
+            subject: $subject,
+            content: $content,
+        );
+
+        $result = (array) \json_decode($sender->send($message));
+
+        $this->assertEquals($to, $result['To']);
+        $this->assertEquals('OK', $result['Message']);
+    }
+}