* added issue_relations branch

* issue_relation model added

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@162 e93f8b46-1217-0410-a6f0-8f06a7374b81

issue_relations/app/models/token.rb

@@ -0,0 +1,44 @@
+# redMine - project management software
+# Copyright (C) 2006  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+class Token < ActiveRecord::Base
+  belongs_to :user
+  
+  @@validity_time = 1.day
+  
+  def before_create
+    self.value = Token.generate_token_value
+  end
+
+  # Return true if token has expired  
+  def expired?
+    return Time.now > self.created_on + @@validity_time
+  end
+  
+  # Delete all expired tokens
+  def self.destroy_expired
+    Token.delete_all ["created_on < ?", Time.now - @@validity_time]
+  end
+  
+private
+  def self.generate_token_value
+    chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a
+    token_value = ''
+    40.times { |i| token_value << chars[rand(chars.size-1)] }
+    token_value
+  end
+end