fix: handle incorrect mailing list ids

1 files changed, 9 insertions, 1 deletions

diff --git a/filters/mailing_lists_filter.rb b/filters/mailing_lists_filter.rb
index 872a817..feaee0e 100644
--- a/filters/mailing_lists_filter.rb
+++ b/filters/mailing_lists_filter.rb
@@ -5,7 +5,12 @@ module Chotto
   # Baed on RFC 2919
   module MailingListsFilter
     def self.list_id_from_header(value)
-      value.match(/<(.*)>/)[1].gsub(' ', '')
+      id = value.match(/<(.*)>/)
+      if id  
+        id[1]&.gsub(' ', '')
+      else
+        value
+      end
     end
   end
 end
@@ -13,9 +18,12 @@ end
 MAILING_LIST_FILTER = lambda do
   Chotto.rule_set 'mailing_lists' do
     messages.filter('NOT tag:lists').each do |msg|
+      unless msg.list_id.empty?
+
       list_id = Chotto::MailingListsFilter.list_id_from_header(msg.list_id)
       msg.tags = ['unread', 'inbox', 'lists', "lists/#{list_id}"]
       msg.save!
+      end
     end
   end
 end