[UploadWhitelist] Make upload whitelist case insensitive (#651)

.rubocop_todo.yml

@@ -1307,6 +1307,7 @@ Rails/OutputSafety:
     - 'app/views/users/custom_style.css.erb'
     - 'app/views/users/edit.html.erb'
     - 'app/views/users/home.html.erb'
+    - 'app/views/upload_whitelists/_form.html.erb'
 
 # Offense count: 9
 # This cop supports unsafe autocorrection (--autocorrect-all).

app/models/upload_whitelist.rb

@@ -66,7 +66,7 @@ class UploadWhitelist < ApplicationRecord
     end
 
     entries.each do |x|
-      if File.fnmatch?(x.pattern, url)
+      if File.fnmatch?(x.pattern, url, File::FNM_CASEFOLD)
         return [x.allowed, x.reason]
       end
     end

app/views/upload_whitelists/_form.html.erb

@@ -1,7 +1,7 @@
 <%= custom_form_for(@whitelist) do |f| %>
   <%= error_messages_for "whitelist" %>
 
-  <%= f.input :pattern, label: "Pattern", as: :string %>
+  <%= f.input :pattern, label: "Pattern", as: :string, hint: "* matches zero or more, ? matches exactly one character. See more #{link_to('here', 'https://apidock.com/ruby/v2_5_5/File/fnmatch/class')}.".html_safe %>
   <%= f.input :note, label: "Note", as: :string %>
   <%= f.input :allowed, label: "Upload Allowed", as: :boolean %>
   <%= f.input :reason, label: "Ban Reason", as: :string %>