obsolete.ChilliProject/app/models/watcher.rb

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#-- encoding: UTF-8
#-- copyright
# ChiliProject is a project management system.
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#
# Copyright (C) 2010-2011 the ChiliProject Team
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#
# 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.
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#
# See doc/COPYRIGHT.rdoc for more details.
#++
class Watcher < ActiveRecord::Base
belongs_to :watchable, :polymorphic => true
belongs_to :user
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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
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protected
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def validate
errors.add :user_id, :invalid unless user.nil? || user.active?
end
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private
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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?
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if options.has_key?(:project)
next unless watcher.watchable.respond_to?(:project) && watcher.watchable.project == options[:project]
end
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if watcher.watchable.respond_to?(:visible?)
unless watcher.watchable.visible?(user)
watcher.destroy
pruned += 1
end
end
end
pruned
end
end