Chris@909: # Redmine - project management software
Chris@909: # Copyright (C) 2006-2011  Jean-Philippe Lang
Chris@909: #
Chris@909: # This program is free software; you can redistribute it and/or
Chris@909: # modify it under the terms of the GNU General Public License
Chris@909: # as published by the Free Software Foundation; either version 2
Chris@909: # of the License, or (at your option) any later version.
Chris@909: #
Chris@909: # This program is distributed in the hope that it will be useful,
Chris@909: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@909: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@909: # GNU General Public License for more details.
Chris@909: #
Chris@909: # You should have received a copy of the GNU General Public License
Chris@909: # along with this program; if not, write to the Free Software
Chris@909: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@909: 
Chris@909: class Workflow < ActiveRecord::Base
Chris@909:   belongs_to :role
Chris@909:   belongs_to :old_status, :class_name => 'IssueStatus', :foreign_key => 'old_status_id'
Chris@909:   belongs_to :new_status, :class_name => 'IssueStatus', :foreign_key => 'new_status_id'
Chris@909: 
Chris@909:   validates_presence_of :role, :old_status, :new_status
Chris@909: 
Chris@909:   # Returns workflow transitions count by tracker and role
Chris@909:   def self.count_by_tracker_and_role
Chris@909:     counts = connection.select_all("SELECT role_id, tracker_id, count(id) AS c FROM #{Workflow.table_name} GROUP BY role_id, tracker_id")
Chris@909:     roles = Role.find(:all, :order => 'builtin, position')
Chris@909:     trackers = Tracker.find(:all, :order => 'position')
Chris@909: 
Chris@909:     result = []
Chris@909:     trackers.each do |tracker|
Chris@909:       t = []
Chris@909:       roles.each do |role|
Chris@909:         row = counts.detect {|c| c['role_id'].to_s == role.id.to_s && c['tracker_id'].to_s == tracker.id.to_s}
Chris@909:         t << [role, (row.nil? ? 0 : row['c'].to_i)]
Chris@909:       end
Chris@909:       result << [tracker, t]
Chris@909:     end
Chris@909: 
Chris@909:     result
Chris@909:   end
Chris@909: 
Chris@909:   # Find potential statuses the user could be allowed to switch issues to
Chris@909:   def self.available_statuses(project, user=User.current)
Chris@909:     Workflow.find(:all,
Chris@909:                   :include => :new_status,
Chris@909:                   :conditions => {:role_id => user.roles_for_project(project).collect(&:id)}).
Chris@909:       collect(&:new_status).
Chris@909:       compact.
Chris@909:       uniq.
Chris@909:       sort
Chris@909:   end
Chris@909: 
Chris@909:   # Copies workflows from source to targets
Chris@909:   def self.copy(source_tracker, source_role, target_trackers, target_roles)
Chris@909:     unless source_tracker.is_a?(Tracker) || source_role.is_a?(Role)
Chris@909:       raise ArgumentError.new("source_tracker or source_role must be specified")
Chris@909:     end
Chris@909: 
Chris@909:     target_trackers = [target_trackers].flatten.compact
Chris@909:     target_roles = [target_roles].flatten.compact
Chris@909: 
Chris@909:     target_trackers = Tracker.all if target_trackers.empty?
Chris@909:     target_roles = Role.all if target_roles.empty?
Chris@909: 
Chris@909:     target_trackers.each do |target_tracker|
Chris@909:       target_roles.each do |target_role|
Chris@909:         copy_one(source_tracker || target_tracker,
Chris@909:                    source_role || target_role,
Chris@909:                    target_tracker,
Chris@909:                    target_role)
Chris@909:       end
Chris@909:     end
Chris@909:   end
Chris@909: 
Chris@909:   # Copies a single set of workflows from source to target
Chris@909:   def self.copy_one(source_tracker, source_role, target_tracker, target_role)
Chris@909:     unless source_tracker.is_a?(Tracker) && !source_tracker.new_record? &&
Chris@909:       source_role.is_a?(Role) && !source_role.new_record? &&
Chris@909:       target_tracker.is_a?(Tracker) && !target_tracker.new_record? &&
Chris@909:       target_role.is_a?(Role) && !target_role.new_record?
Chris@909: 
Chris@909:       raise ArgumentError.new("arguments can not be nil or unsaved objects")
Chris@909:     end
Chris@909: 
Chris@909:     if source_tracker == target_tracker && source_role == target_role
Chris@909:       false
Chris@909:     else
Chris@909:       transaction do
Chris@909:         delete_all :tracker_id => target_tracker.id, :role_id => target_role.id
Chris@909:         connection.insert "INSERT INTO #{Workflow.table_name} (tracker_id, role_id, old_status_id, new_status_id, author, assignee)" +
Chris@909:                           " SELECT #{target_tracker.id}, #{target_role.id}, old_status_id, new_status_id, author, assignee" +
Chris@909:                           " FROM #{Workflow.table_name}" +
Chris@909:                           " WHERE tracker_id = #{source_tracker.id} AND role_id = #{source_role.id}"
Chris@909:       end
Chris@909:       true
Chris@909:     end
Chris@909:   end
Chris@909: end