FEATURE #1372: add feature for editing static pages.

User can edit static pages. The edit itself also stores history of changed columns.

modules/StaticPages/Http/Requests/EditStaticPageRequest.php

@@ -0,0 +1,29 @@
+<?php
+namespace Modules\StaticPages\Http\Requests;
+
+use App\Enumerations\ContentStatuses;
+use App\Http\Requests\Request;
+
+class EditStaticPageRequest extends Request
+{
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        // get all available statuses
+        $statuses = ContentStatuses::getSimple();
+        $statuses = implode(',', $statuses);
+
+        return [
+            'title'           => 'required',
+            'url'             => 'required|unique:contents,url,'.$this->id,
+            'published_from'  => 'date',
+            'published_to'    => 'date',
+            'title_photo'     => 'exists:files,id',
+            'status'          => 'required|in:'.$statuses
+        ];
+    }
+}