Added a Activities tab to Project Settings

* Changed Project#activities to allow getting inactive Activities also:
  * Changed the Enumeration#all named_scope to exclude project specific Activities
  * Changed the Project has_many time_entry_activities to include all by default
    and provided an #active method to filter them to active ones only
  * Split Project#activities to two methods and gave it a parameter that is used
    to determine if inactive activities are included (default is no)
* Added a reset button to delete all project specific activities.
* Added ProjectsController#reset_activities to remove the project
  specific activities
* Added a HTTP DELETE route for reset_activities
* Changed the permissions for managing project activities to have access to the
  ProjectsController#reset_activities action
* Added a way to bulk save Project specific Activities in ProjectsController
  * #save_activities will save all the changed activities, including update the
    existing records
  * Added helper methods to the controller which will be refactored later
  * Allow the same TimeEntryActivity names on different projects

  #4077

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2949 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/enumeration.rb

@@ -25,7 +25,7 @@ class Enumeration < ActiveRecord::Base
   before_destroy :check_integrity
   
   validates_presence_of :name
-  validates_uniqueness_of :name, :scope => [:type]
+  validates_uniqueness_of :name, :scope => [:type, :project_id]
   validates_length_of :name, :maximum => 30
   
   # Backwards compatiblity named_scopes.
@@ -58,7 +58,7 @@ class Enumeration < ActiveRecord::Base
   end
   # End backwards compatiblity named_scopes
 
-  named_scope :all, :order => 'position'
+  named_scope :all, :order => 'position', :conditions => { :project_id => nil }
 
   named_scope :active, lambda {
     {
@@ -134,6 +134,32 @@ class Enumeration < ActiveRecord::Base
   def self.get_subclasses
     @@subclasses[Enumeration]
   end
+
+  # Does the +new+ Hash override the previous Enumeration?
+  def self.overridding_change?(new, previous)
+    if (same_active_state?(new['active'], previous.active)) && same_custom_values?(new,previous)
+      return false
+    else
+      return true
+    end
+  end
+
+  # Does the +new+ Hash have the same custom values as the previous Enumeration?
+  def self.same_custom_values?(new, previous)
+    previous.custom_field_values.each do |custom_value|
+      if custom_value.value != new["custom_field_values"][custom_value.custom_field_id.to_s]
+        return false
+      end
+    end
+
+    return true
+  end
+  
+  # Are the new and previous fields equal?
+  def self.same_active_state?(new, previous)
+    new = (new == "1" ? true : false)
+    return new == previous
+  end
   
 private
   def check_integrity