From 80e32594e25d1bb1d1918aa26f79af718b307ea5 Mon Sep 17 00:00:00 2001
From: Alexander Skvortsov <38059171+askvortsov1@users.noreply.github.com>
Date: Fri, 24 Apr 2020 16:29:16 -0400
Subject: [PATCH] Disable "Start Discussion" button for restricted tags (#74)

Also, change the label when the button is disabled.
---
 extensions/tags/js/src/forum/addTagFilter.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/extensions/tags/js/src/forum/addTagFilter.js b/extensions/tags/js/src/forum/addTagFilter.js
index 95ed7c78d..b141e841d 100644
--- a/extensions/tags/js/src/forum/addTagFilter.js
+++ b/extensions/tags/js/src/forum/addTagFilter.js
@@ -35,16 +35,21 @@ export default function() {
   });
 
   // If currently viewing a tag, restyle the 'new discussion' button to use
-  // the tag's color.
+  // the tag's color, and disable if the user isn't allowed to edit.
   extend(IndexPage.prototype, 'sidebarItems', function(items) {
     const tag = this.currentTag();
 
     if (tag) {
       const color = tag.color();
+      const canStartDiscussion = tag.canStartDiscussion();
 
       if (color) {
         items.get('newDiscussion').props.style = {backgroundColor: color};
       }
+    
+      items.get('newDiscussion').props.disabled = !canStartDiscussion;
+      items.get('newDiscussion').props.children = app.translator.trans(canStartDiscussion ? 'core.forum.index.start_discussion_button' : 'core.forum.index.cannot_start_discussion_button');
+    
     }
   });