🚧 Continues tests, parser and starts builder

For #4

src/Entity/Channel/Image.php

@@ -2,14 +2,47 @@
 
 namespace Shikiryu\SRSS\Entity\Channel;
 
-class Image
+use Shikiryu\SRSS\Entity\SRSSElement;
+use Shikiryu\SRSS\Validator\HasValidator;
+use Shikiryu\SRSS\Validator\Validator;
+
+class Image extends HasValidator implements SRSSElement
 {
+    /**
+     * @required
+     * @url
+     */
     public string $url;
+    /**
+     * @required
+     * @nohtml
+     */
     public string $title;
+    /**
+     * @required
+     * @url
+     */
     public string $link;
-    public int $width; // Maximum value for width is 144, default value is 88.
-    public int $height; //Maximum value for height is 400, default value is 31.
+    /**
+     * @int
+     * @max 144
+     */
+    public int $width = 88; // Maximum value for width is 144, default value is 88.
+    /**
+     * @int
+     * @max 400
+     */
+    public int $height = 31; //Maximum value for height is 400, default value is 31.
+
     public string $description;
 
-    public array $required = ['url', 'title', 'link'];
+    public function isValid(): bool
+    {
+        return (new Validator())->isObjectValid($this);
+    }
+
+    public function toArray(): array
+    {
+        return get_object_vars($this);
+    }
 }