Added the ability to archive projects:

* Only administrators can archive/unarchive projects.
* Once archived, the project is visible on the admin project listing only. It doesn't show up anywhere else in the app. Subprojects are also archived.
* Archive/unarchive preserve everything on the project (issues, members, ...).
* A subproject can not be unarchived if its parent project is archived.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@549 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project.rb

@@ -16,6 +16,10 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class Project < ActiveRecord::Base
+  # Project statuses
+  STATUS_ACTIVE     = 1
+  STATUS_ARCHIVED   = 9
+  
   has_many :versions, :dependent => :destroy, :order => "#{Version.table_name}.effective_date DESC, #{Version.table_name}.name DESC"
   has_many :members, :dependent => :delete_all, :include => :user, :conditions => "#{User.table_name}.status=#{User::STATUS_ACTIVE}"
   has_many :users, :through => :members
@@ -32,6 +36,8 @@ class Project < ActiveRecord::Base
   has_and_belongs_to_many :custom_fields, :class_name => 'IssueCustomField', :join_table => "#{table_name_prefix}custom_fields_projects#{table_name_suffix}", :association_foreign_key => 'custom_field_id'
   acts_as_tree :order => "name", :counter_cache => true
   
+  attr_protected :status
+  
   validates_presence_of :name, :description, :identifier
   validates_uniqueness_of :name, :identifier
   validates_associated :custom_values, :on => :update
@@ -52,12 +58,11 @@ class Project < ActiveRecord::Base
   
   def issues_with_subprojects(include_subprojects=false)
     conditions = nil
-    if include_subprojects && children.size > 0
-      ids = [id] + children.collect {|c| c.id}
+    if include_subprojects && !active_children.empty?
+      ids = [id] + active_children.collect {|c| c.id}
       conditions = ["#{Issue.table_name}.project_id IN (#{ids.join(',')})"]
-    else
-      conditions = ["#{Issue.table_name}.project_id = ?", id]
     end
+    conditions ||= ["#{Issue.table_name}.project_id = ?", id]
     Issue.with_scope :find => { :conditions => conditions } do 
       yield
     end 
@@ -71,14 +76,35 @@ class Project < ActiveRecord::Base
 
   def self.visible_by(user=nil)
     if user && user.admin?
-      return nil
+      return ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE}"]
     elsif user && !user.memberships.empty?
-      return ["#{Project.table_name}.is_public = ? or #{Project.table_name}.id IN (#{user.memberships.collect{|m| m.project_id}.join(',')})", true]
+      return ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE} AND (#{Project.table_name}.is_public = ? or #{Project.table_name}.id IN (#{user.memberships.collect{|m| m.project_id}.join(',')}))", true]
     else
-      return ["#{Project.table_name}.is_public = ?", true]
+      return ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE} AND #{Project.table_name}.is_public = ?", true]
     end
   end
   
+  def active?
+    self.status == STATUS_ACTIVE
+  end
+  
+  def archive
+    # Archive subprojects if any
+    children.each do |subproject|
+      subproject.archive
+    end
+    update_attribute :status, STATUS_ARCHIVED
+  end
+  
+  def unarchive
+    return false if parent && !parent.active?
+    update_attribute :status, STATUS_ACTIVE
+  end
+  
+  def active_children
+    children.select {|child| child.active?}
+  end
+  
   # Returns an array of all custom fields enabled for project issues
   # (explictly associated custom fields and custom fields enabled for all projects)
   def custom_fields_for_issues(tracker)