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# redMine - project management software
# Copyright (C) 2006-2007 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
class Watcher < ActiveRecord::Base
belongs_to :watchable, :polymorphic => true
belongs_to :user
validates_presence_of :user
validates_uniqueness_of :user_id, :scope => [:watchable_type, :watchable_id]
# Unwatch things that users are no longer allowed to view
def self.prune(options={})
if options.has_key?(:user)
prune_single_user(options[:user], options)
else
pruned = 0
User.find(:all, :conditions => "id IN (SELECT DISTINCT user_id FROM #{table_name})").each do |user|
pruned += prune_single_user(user, options)
end
pruned
end
end
protected
def validate
errors.add :user_id, :invalid unless user.nil? || user.active?
end
private
def self.prune_single_user(user, options={})
return unless user.is_a?(User)
pruned = 0
find(:all, :conditions => {:user_id => user.id}).each do |watcher|
next if watcher.watchable.nil?
if options.has_key?(:project)
next unless watcher.watchable.respond_to?(:project) && watcher.watchable.project == options[:project]
end
if watcher.watchable.respond_to?(:visible?)
unless watcher.watchable.visible?(user)
watcher.destroy
pruned += 1
end
end
end
pruned
end
end
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