4 files changed, 69 insertions, 11 deletions
diff --git a/lib/redmine.rb b/lib/redmine.rb
index 20b30c037..cfcccccf9 100644
--- a/lib/redmine.rb
+++ b/lib/redmine.rb
@@ -1,11 +1,2 @@
-module Redmine
-  module VERSION #:nodoc:
-    MAJOR = 0
-    MINOR = 5
-    TINY  = 0
-
-    STRING= [MAJOR, MINOR, TINY].join('.')
-    
-    def self.to_s; STRING end    
-  end
-end
-\ No newline at end of file
+require 'redmine/version'
+require 'redmine/acts_as_watchable/init'
diff --git a/lib/redmine/acts_as_watchable/init.rb b/lib/redmine/acts_as_watchable/init.rb
new file mode 100644
index 000000000..f39cc7d18
--- /dev/null
+++ b/lib/redmine/acts_as_watchable/init.rb
@@ -0,0 +1,3 @@
+# Include hook code here
+require File.dirname(__FILE__) + '/lib/acts_as_watchable'
+ActiveRecord::Base.send(:include, Redmine::Acts::Watchable)
diff --git a/lib/redmine/acts_as_watchable/lib/acts_as_watchable.rb b/lib/redmine/acts_as_watchable/lib/acts_as_watchable.rb
new file mode 100644
index 000000000..d62742cac
--- /dev/null
+++ b/lib/redmine/acts_as_watchable/lib/acts_as_watchable.rb
@@ -0,0 +1,53 @@
+# ActsAsWatchable
+module Redmine
+  module Acts
+    module Watchable
+      def self.included(base) 
+        base.extend ClassMethods
+      end 
+
+      module ClassMethods
+        def acts_as_watchable(options = {})
+          return if self.included_modules.include?(Redmine::Acts::Watchable::InstanceMethods)          
+          send :include, Redmine::Acts::Watchable::InstanceMethods
+          
+          class_eval do
+            has_many :watchers, :as => :watchable, :dependent => :delete_all
+          end
+        end
+      end
+
+      module InstanceMethods
+        def self.included(base)
+          base.extend ClassMethods
+        end
+        
+        def add_watcher(user)
+          self.watchers << Watcher.new(:user => user)
+        end
+        
+        def remove_watcher(user)
+          return nil unless user && user.is_a?(User)
+          Watcher.delete_all "watchable_type = '#{self.class}' AND watchable_id = #{self.id} AND user_id = #{user.id}"
+        end
+        
+        def watched_by?(user)
+          !self.watchers.find(:first,
+                              :conditions => ["#{Watcher.table_name}.user_id = ?", user.id]).nil?
+        end
+        
+        def watcher_recipients
+          self.watchers.collect { |w| w.user.mail if w.user.mail_notification }.compact
+        end
+
+        module ClassMethods
+          def watched_by(user)
+            find(:all, 
+                 :include => :watchers,
+                 :conditions => ["#{Watcher.table_name}.user_id = ?", user.id])
+          end
+        end
+      end
+    end
+  end
+end 
+\ No newline at end of file
diff --git a/lib/redmine/version.rb b/lib/redmine/version.rb
new file mode 100644
index 000000000..630fb1ff8
--- /dev/null
+++ b/lib/redmine/version.rb
@@ -0,0 +1,11 @@
+module Redmine
+  module VERSION #:nodoc:
+    MAJOR = 0
+    MINOR = 5
+    TINY  = 0
+
+    STRING= [MAJOR, MINOR, TINY].join('.')
+    
+    def self.to_s; STRING end    
+  end
+end