feat: email abstract

src/Abstracts/EmailAbstract.php

@@ -44,7 +44,7 @@ abstract class EmailAbstract implements EmailInterface {
     /**
      * @var string
      */
-    protected $type = 'text/html';
+    protected $type = 'html';
 
     /**
      * @var array
@@ -66,7 +66,9 @@ abstract class EmailAbstract implements EmailInterface {
     }
 
     /**
-     * @return bool
+     * @param $enable
+     *
+     * @return EmailAbstract
      */
     public function set_is_enable( $enable ): self {
         $this->is_enable = $enable;
@@ -218,7 +220,7 @@ abstract class EmailAbstract implements EmailInterface {
      *
      * @return self
      */
-    public function set_type( string $type = 'text/html' ): self {
+    public function set_type( string $type = 'html' ): self {
         $this->type = $type;
 
         return $this;
@@ -233,6 +235,22 @@ abstract class EmailAbstract implements EmailInterface {
         return $this->type;
     }
 
+    /**
+     * Get content type.
+     *
+     * @return string
+     */
+    public function get_content_type(): string {
+        switch ( $this->get_type() ) {
+            case 'html':
+                return 'text/html';
+            case 'multipart':
+                return 'multipart/alternative';
+            default:
+                return 'text/plain';
+        }
+    }
+
     /**
      * Get email content.
      *

src/Abstracts/EmailInterface.php

@@ -67,6 +67,13 @@ interface EmailInterface {
      */
     public function get_type(): string;
 
+    /**
+     * Get content type.
+     *
+     * @return string
+     */
+    public function get_content_type(): string;
+
     /**
      * Get email content.
      *