Added Mailchimp Email Adapater

docker-compose.yml

@@ -5,6 +5,7 @@ services:
     environment:
     - MAILGUN_API_KEY
     - MAILGUN_DOMAIN
+    - MAILCHIMP_API_KEY
     - SENDGRID_API_KEY
     - FCM_SERVER_KEY
     - FCM_SERVER_TO

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

@@ -0,0 +1,78 @@
+<?php
+
+namespace Utopia\Messaging\Adapters\Email;
+
+use Utopia\Messaging\Adapters\Email as EmailAdapter;
+use Utopia\Messaging\Messages\Email;
+
+class Mailchimp extends EmailAdapter
+{
+    /**
+     * @param  string  $apiKey Your Mailchimp API key to authenticate with the API.
+     */
+    public function __construct(
+        private string $apiKey,
+    ) {
+    }
+
+    /**
+     * Get adapter name.
+     *
+     * @return string
+     */
+    public function getName(): string
+    {
+        return 'Mailchimp';
+    }
+
+    /**
+     * Get adapter description.
+     *
+     * @return int
+     */
+    public function getMaxMessagesPerRequest(): int
+    {
+        return 1000; // Depends based on the pricing plan
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @param  Email  $message
+     * @return string
+     *
+     * @throws Exception
+     */
+    protected function process(Email $message): string
+    {
+        return $this->request(
+            method: 'POST',
+            url: 'https://mandrillapp.com/api/1.0/messages/send',
+            headers: [
+                'Content-Type: application/json',
+            ],
+            body: \json_encode([
+                'key' => $this->apiKey,
+                'message' => [
+                    'html' => $message->isHtml() ? $message->getContent() : null,
+                    'text' => $message->isHtml() ? null : $message->getContent(),
+                    'subject' => $message->getSubject(),
+                    'from_email' => $message->getFrom(),
+                    'to' => \array_map(
+                        fn ($to) => ['email' => $to],
+                        $message->getTo()
+                    ),
+                    'attachments' => $message->getAttachments() ? \array_map(
+                        fn ($attachement) => [
+                            'type' => $attachement['type'],
+                            'name' => $attachement['name'],
+                            'content' => $attachement['content'],
+                        ],
+                        $message->getAttachments()
+                    ) : null,
+                ],
+            ]
+            )
+        );
+    }
+}

tests/e2e/Email/MailchimpTest.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Tests\E2E;
+
+use Utopia\Messaging\Adapters\Email\Mailchimp;
+use Utopia\Messaging\Messages\Email;
+
+class MailchimpTest extends Base
+{
+    /**
+     * @throws \Exception
+     */
+    public function testSendEmail()
+    {
+        $key = getenv('MAILCHIMP_API_KEY');
+
+        $sender = new Mailchimp(
+            apiKey: $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))[0];
+
+        $this->assertArrayHasKey('_id', $result);
+        $this->assertArrayHasKey('status', $result);
+        $this->assertTrue(str_contains(strtolower($result['status']), 'sent'));
+    }
+}