Added ability to add attachments to emails

lib/Contracts/Mailable.php

@@ -219,4 +219,22 @@ public function validateSubject();
      * @return string API data
      */
     public function buildSubject(): array;
+
+    /**
+     * Set Attachment
+     *
+     * @param $attachment string  attachment file object
+     * @param $mime_type  string  attachment mime type
+     * @param $name       string  attachment filename
+     *
+     * @return mixed
+     */
+    public function setAttachment(string $attachment, string $mime_type, string $name);
+
+    /**
+     * Build Attachment
+     *
+     * @return array
+     */
+    public function buildAttachment();
 }

lib/Mail/Concerns/HasAttachment.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Xedi\SendGrid\Mail\Concerns;
+
+/**
+ * HasAttachment Concern
+ *
+ * @package Xedi\SendGrid\Mail\Concerns
+ * @author  Adam Witeszczak <adam@xedi.com>
+ */
+trait HasAttachment
+{
+    protected $attachments = [];
+
+    /**
+     * Set Attachment
+     *
+     * @param $attachment string attachment file as string
+     * @param $mime_type  string mime type
+     * @param $name       string name
+     *
+     * @return $this
+     */
+    public function setAttachment($attachment, $mime_type, $name)
+    {
+        $toAttach = new \StdClass();
+        $toAttach->content = base64_encode($attachment);
+        $toAttach->type = $mime_type;
+        $toAttach->filename = $name;
+        $toAttach->disposition = 'attachment';
+        $this->attachments[] = $toAttach;
+
+        return $this;
+    }
+
+    /**
+     * Has Attachment
+     *
+     * @return bool
+     */
+    public function hasAttachment(): bool
+    {
+        return count($this->attachments) > 0;
+    }
+
+    /**
+     * Build the Attachment data for the API Request
+     *
+     * @return string API data
+     */
+    public function buildAttachment(): array
+    {
+        return [
+            'attachments' => $this->attachments
+        ];
+    }
+}

lib/Mail/Mail.php

@@ -9,6 +9,7 @@
 use Xedi\SendGrid\Mail\Concerns\HasRecipients;
 use Xedi\SendGrid\Mail\Concerns\HasSender;
 use Xedi\SendGrid\Mail\Concerns\HasSubject;
+use Xedi\SendGrid\Mail\Concerns\HasAttachment;
 
 /**
  * Class Mail
@@ -18,6 +19,7 @@
  */
 class Mail implements Mailable
 {
+    use HasAttachment;
     use HasContent;
     use HasRecipients;
     use HasSender;
@@ -55,6 +57,10 @@ public function send(Client $client): Response
             $this->buildSubject()
         );
 
+        if ($this->hasAttachment()) {
+            $data = array_merge($data, $this->buildAttachment());
+        }
+
         return $client->post('v3/mail/send', $data);
     }
 }