Added controller to save custom CSS

Added controller to display and save custom CSS on the edit-link page.
See: https://blog.littlelink-custom.com/upcoming-features/

Author: JulianPrieber

app/Http/Controllers/UserController.php

@@ -192,11 +192,12 @@ public function showLink(request $request)
         $link = Link::where('id', $linkId)->value('link');
         $title = Link::where('id', $linkId)->value('title');
         $order = Link::where('id', $linkId)->value('order');
+        $custom_css = Link::where('id', $linkId)->value('custom_css');
         $buttonId = Link::where('id', $linkId)->value('button_id');
 
         $buttons = Button::select('id', 'name')->get();
 
-        return view('studio/edit-link', ['buttonId' => $buttonId, 'buttons' => $buttons, 'link' => $link, 'title' => $title, 'order' => $order, 'id' => $linkId]);
+        return view('studio/edit-link', ['custom_css' => $custom_css, 'buttonId' => $buttonId, 'buttons' => $buttons, 'link' => $link, 'title' => $title, 'order' => $order, 'id' => $linkId]);
 
     }
 
@@ -207,6 +208,7 @@ public function editLink(request $request)
             'link' => 'required',
             'title' => 'required',
             'button' => 'required',
+            'custom_css' => 'required',
         ]);
 
         if (stringStartsWith($request->link,'http://') == 'true' or stringStartsWith($request->link,'https://') == 'true' or stringStartsWith($request->link,'mailto:') == 'true')
@@ -221,10 +223,11 @@ public function editLink(request $request)
         $order = $request->order;
         $button = $request->button;
         $linkId = $request->id;
+        $custom_css = $request->custom_css;
 
         $buttonId = Button::select('id')->where('name' , $button)->value('id');
 
-        Link::where('id', $linkId)->update(['link' => $link, 'title' => $title, 'order' => $order, 'button_id' => $buttonId]);
+        Link::where('id', $linkId)->update(['link' => $link, 'title' => $title, 'order' => $order, 'button_id' => $buttonId, 'custom_css' => $custom_css]);
 
         return redirect('/studio/links');
     }