Chris@909: # redMine - project management software
Chris@909: # Copyright (C) 2006-2008  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: module Redmine
Chris@909:   module Acts
Chris@909:     module ActivityProvider
Chris@909:       def self.included(base)
Chris@909:         base.extend ClassMethods
Chris@909:       end
Chris@909: 
Chris@909:       module ClassMethods
Chris@909:         def acts_as_activity_provider(options = {})
Chris@909:           unless self.included_modules.include?(Redmine::Acts::ActivityProvider::InstanceMethods)
Chris@909:             cattr_accessor :activity_provider_options
Chris@909:             send :include, Redmine::Acts::ActivityProvider::InstanceMethods
Chris@909:           end
Chris@909: 
Chris@909:           options.assert_valid_keys(:type, :permission, :timestamp, :author_key, :find_options)
Chris@909:           self.activity_provider_options ||= {}
Chris@909:           
Chris@909:           # One model can provide different event types
Chris@909:           # We store these options in activity_provider_options hash
Chris@909:           event_type = options.delete(:type) || self.name.underscore.pluralize
Chris@909:           
Chris@909:           options[:timestamp] ||= "#{table_name}.created_on"
Chris@909:           options[:find_options] ||= {}
Chris@909:           options[:author_key] = "#{table_name}.#{options[:author_key]}" if options[:author_key].is_a?(Symbol)
Chris@909:           self.activity_provider_options[event_type] = options
Chris@909:         end
Chris@909:       end
Chris@909: 
Chris@909:       module InstanceMethods
Chris@909:         def self.included(base)
Chris@909:           base.extend ClassMethods
Chris@909:         end
Chris@909:                 
Chris@909:         module ClassMethods
Chris@909:           # Returns events of type event_type visible by user that occured between from and to
Chris@909:           def find_events(event_type, user, from, to, options)
Chris@909:             provider_options = activity_provider_options[event_type]
Chris@909:             raise "#{self.name} can not provide #{event_type} events." if provider_options.nil?
Chris@909:             
Chris@909:             scope_options = {}
Chris@909:             cond = ARCondition.new
Chris@909:             if from && to
Chris@909:               cond.add(["#{provider_options[:timestamp]} BETWEEN ? AND ?", from, to])
Chris@909:             end
Chris@909:             
Chris@909:             if options[:author]
Chris@909:               return [] if provider_options[:author_key].nil?
Chris@909:               cond.add(["#{provider_options[:author_key]} = ?", options[:author].id])
Chris@909:             end
Chris@909:             
Chris@909:             if options[:limit]
Chris@909:               # id and creation time should be in same order in most cases
Chris@909:               scope_options[:order] = "#{table_name}.id DESC"
Chris@909:               scope_options[:limit] = options[:limit]
Chris@909:             end
Chris@909:             
Chris@909:             scope = self
Chris@909:             if provider_options.has_key?(:permission)
Chris@909:               cond.add(Project.allowed_to_condition(user, provider_options[:permission] || :view_project, options))
Chris@909:             elsif respond_to?(:visible)
Chris@909:               scope = scope.visible(user, options)
Chris@909:             else
Chris@909:               ActiveSupport::Deprecation.warn "acts_as_activity_provider with implicit :permission option is deprecated. Add a visible scope to the #{self.name} model or use explicit :permission option."
Chris@909:               cond.add(Project.allowed_to_condition(user, "view_#{self.name.underscore.pluralize}".to_sym, options))
Chris@909:             end
Chris@909:             scope_options[:conditions] = cond.conditions
Chris@909:             
Chris@909:             with_scope(:find => scope_options) do
Chris@909:               scope.find(:all, provider_options[:find_options].dup)
Chris@909:             end
Chris@909:           end
Chris@909:         end
Chris@909:       end
Chris@909:     end
Chris@909:   end
Chris@909: end