Added the ability to copy a project in the Project Administration panel.

* Added Copy project button.
* Added Project#copy_from to duplicate a project to be modified and saved by the user
* Added a ProjectsController#copy based off the add method
** Used Project#copy_from to create a duplicate project in memory
* Implemented Project#copy to copy data for a project from another and save it.
** Members
** Project level queries
** Project custom fields
* Added a plugin hook for Project#copy.

  #1125  #1556  #886  #309

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2704 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/project.rb

@@ -318,6 +318,66 @@ class Project < ActiveRecord::Base
     p.nil? ? nil : p.identifier.to_s.succ
   end
 
+  # Copies and saves the Project instance based on the +project+.
+  # Will duplicate the source project's:
+  # * Issues
+  # * Members
+  # * Queries
+  def copy(project)
+    project = project.is_a?(Project) ? project : Project.find(project)
+
+    Project.transaction do
+      # Issues
+      project.issues.each do |issue|
+        new_issue = Issue.new
+        new_issue.copy_from(issue)
+        self.issues << new_issue
+      end
+    
+      # Members
+      project.members.each do |member|
+        new_member = Member.new
+        new_member.attributes = member.attributes.dup.except("project_id")
+        new_member.project = self
+        self.members << new_member
+      end
+      
+      # Queries
+      project.queries.each do |query|
+        new_query = Query.new
+        new_query.attributes = query.attributes.dup.except("project_id", "sort_criteria")
+        new_query.sort_criteria = query.sort_criteria if query.sort_criteria
+        new_query.project = self
+        self.queries << new_query
+      end
+
+      Redmine::Hook.call_hook(:model_project_copy_before_save, :source_project => project, :destination_project => self)
+      self.save
+    end
+  end
+
+  
+  # Copies +project+ and returns the new instance.  This will not save
+  # the copy
+  def self.copy_from(project)
+    begin
+      project = project.is_a?(Project) ? project : Project.find(project)
+      if project
+        # clear unique attributes
+        attributes = project.attributes.dup.except('name', 'identifier', 'id', 'status')
+        copy = Project.new(attributes)
+        copy.enabled_modules = project.enabled_modules
+        copy.trackers = project.trackers
+        copy.custom_values = project.custom_values.collect {|v| v.clone}
+        return copy
+      else
+        return nil
+      end
+    rescue ActiveRecord::RecordNotFound
+      return nil
+    end
+  end
+  
 protected
   def validate
     errors.add(:identifier, :invalid) if !identifier.blank? && identifier.match(/^\d*$/)