Add ability to use a link instead of a page #750 (#757)

Add ability to use a link instead of a page #750

app/Exceptions/UnknownPageType.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Exceptions;
+
+use App\Models\Page;
+
+class UnknownPageType extends AbstractHttpException
+{
+    private $page;
+
+    public function __construct(Page $page)
+    {
+        $this->page = $page;
+        parent::__construct(
+            400,
+            'Unknown page type "'.$page->type.'"'
+        );
+    }
+
+    /**
+     * Return the RFC 7807 error type (without the URL root)
+     */
+    public function getErrorType(): string
+    {
+        return 'unknown-page-type';
+    }
+
+    /**
+     * Get the detailed error string
+     */
+    public function getErrorDetails(): string
+    {
+        return $this->getMessage();
+    }
+
+    /**
+     * Return an array with the error details, merged with the RFC7807 response
+     */
+    public function getErrorMetadata(): array
+    {
+        return [
+            'id'   => $this->page->id,
+            'type' => $this->page->type,
+        ];
+    }
+}