Improved ticket follow up detection if more T#'s in subject.

app/models/ticket/number/date.rb

@@ -73,10 +73,15 @@ module Ticket::Number::Date
     ticket              = nil
 
     # probe format
-    if string =~ /#{ticket_hook}#{ticket_hook_divider}(#{system_id}\d{2,50})/i
+    string.scan(/#{ticket_hook}#{ticket_hook_divider}(#{system_id}\d{2,48})/i) {
       ticket = Ticket.find_by(number: $1)
-    elsif string =~ /#{ticket_hook}\s{0,2}(#{system_id}\d{2,50})/i
+      break if ticket
+    }
+    if !ticket
+      string.scan(/#{ticket_hook}\s{0,2}(#{system_id}\d{2,48})/i) {
         ticket = Ticket.find_by(number: $1)
+        break if ticket
+      }
     end
     ticket
   end

app/models/ticket/number/increment.rb

@@ -78,10 +78,15 @@ module Ticket::Number::Increment
     ticket              = nil
 
     # probe format
-    if string =~ /#{ticket_hook}#{ticket_hook_divider}(#{system_id}\d{2,48})/i
+    string.scan(/#{ticket_hook}#{ticket_hook_divider}(#{system_id}\d{2,48})/i) {
       ticket = Ticket.find_by(number: $1)
-    elsif string =~ /#{ticket_hook}\s{0,2}(#{system_id}\d{2,48})/i
+      break if ticket
+    }
+    if !ticket
+      string.scan(/#{ticket_hook}\s{0,2}(#{system_id}\d{2,48})/i) {
         ticket = Ticket.find_by(number: $1)
+        break if ticket
+      }
     end
     ticket
   end

test/unit/email_process_follow_up_test.rb

@@ -171,4 +171,48 @@ Some Text"
     assert_equal('open', ticket.state.name)
   end
 
+  test 'process with follow up check - email with more forgein T#\'s in subject' do
+
+    ticket = Ticket.create(
+      title: 'email with more forgein T#\'s in subject',
+      group: Group.lookup(name: 'Users'),
+      customer_id: 2,
+      state: Ticket::State.lookup(name: 'closed'),
+      priority: Ticket::Priority.lookup(name: '2 normal'),
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+    article = Ticket::Article.create(
+      ticket_id: ticket.id,
+      from: 'some_sender@example.com',
+      to: 'some_recipient@example.com',
+      subject: 'follow up with references follow up check',
+      message_id: '<20151222145601.30.608881@edenhofer.zammad.com>',
+      body: 'some message with references follow up check',
+      internal: false,
+      sender: Ticket::Article::Sender.lookup(name: 'Agent'),
+      type: Ticket::Article::Type.lookup(name: 'email'),
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+    sleep 1
+
+    system_id           = Setting.get('system_id')
+    ticket_hook         = Setting.get('ticket_hook')
+    ticket_hook_divider = Setting.get('ticket_hook_divider')
+
+    tn = "[#{ticket_hook}#{ticket_hook_divider}#{system_id}#{Ticket::Number.generate}99]"
+
+    email_raw_string_subject = "From: me@example.com
+To: customer@example.com
+Subject: First foreign Tn #{tn} #{tn} #{tn} - #{ticket.subject_build('some new subject')}
+
+Some Text"
+
+    ticket_p, article_p, user_p, mail = Channel::EmailParser.new.process({}, email_raw_string_subject)
+    ticket = Ticket.find(ticket.id)
+    assert_equal(ticket.id, ticket_p.id)
+    assert_equal('open', ticket.state.name)
+  end
+
 end