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# ActsAsWatchable
module Redmine
module Acts
module Watchable
def self.included(base)
base.extend ClassMethods
end
module ClassMethods
def acts_as_watchable(options = {})
return if self.included_modules.include?(Redmine::Acts::Watchable::InstanceMethods)
send :include, Redmine::Acts::Watchable::InstanceMethods
class_eval do
has_many :watchers, :as => :watchable, :dependent => :delete_all
has_many :watcher_users, :through => :watchers, :source => :user
attr_protected :watcher_ids, :watcher_user_ids
end
end
end
module InstanceMethods
def self.included(base)
base.extend ClassMethods
end
# Returns an array of users that are proposed as watchers
def addable_watcher_users
self.project.users.sort - self.watcher_users
end
# Adds user as a watcher
def add_watcher(user)
self.watchers << Watcher.new(:user => user)
end
# Removes user from the watchers list
def remove_watcher(user)
return nil unless user && user.is_a?(User)
Watcher.delete_all "watchable_type = '#{self.class}' AND watchable_id = #{self.id} AND user_id = #{user.id}"
end
# Adds/removes watcher
def set_watcher(user, watching=true)
watching ? add_watcher(user) : remove_watcher(user)
end
# Returns true if object is watched by user
def watched_by?(user)
!!(user && self.watchers.detect {|w| w.user_id == user.id })
end
# Returns an array of watchers' email addresses
def watcher_recipients
notified = watchers.collect(&:user).select(&:active?)
if respond_to?(:visible?)
notified.reject! {|user| !visible?(user)}
end
notified.collect(&:mail).compact
end
module ClassMethods
# Returns the objects that are watched by user
def watched_by(user)
find(:all,
:include => :watchers,
:conditions => ["#{Watcher.table_name}.user_id = ?", user.id])
end
end
end
end
end
end
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