foodsoft/app/models/task.rb

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# == Schema Information
# Schema version: 20090114101610
#
# Table name: tasks
#
# id :integer(4) not null, primary key
# name :string(255) default(""), not null
# description :string(255)
# due_date :date
# done :boolean(1)
# workgroup_id :integer(4)
# assigned :boolean(1)
# created_on :datetime not null
# updated_on :datetime not null
# required_users :integer(4) default(1)
#
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class Task < ActiveRecord::Base
has_many :assignments, :dependent => :destroy
has_many :users, :through => :assignments
belongs_to :workgroup
named_scope :non_group, :conditions => { :workgroup_id => nil, :done => false }, :order => "due_date ASC"
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# form will send user in string. responsibilities will added later
attr_protected :users
validates_length_of :name, :minimum => 3
def is_assigned?(user)
self.assignments.detect {|ass| ass.user_id == user.id }
end
def is_accepted?(user)
self.assignments.detect {|ass| ass.user_id == user.id && ass.accepted }
end
def enough_users_assigned?
assignments.find_all_by_accepted(true).size >= required_users ? true : false
end
# extracts nicknames from a comma seperated string
# and makes the users responsible for the task
def user_list=(string)
@user_list = string.split(%r{,\s*})
new_users = @user_list - users.collect(&:nick)
old_users = users.reject { |user| @user_list.include?(user.nick) }
logger.debug "New users: #{new_users}"
logger.debug "Old users: #{old_users}"
self.class.transaction do
# delete old assignments
if old_users.any?
assignments.find(:all, :conditions => ["user_id IN (?)", old_users.collect(&:id)]).each(&:destroy)
end
# create new assignments
new_users.each do |nick|
user = User.find_by_nick(nick)
if user.blank?
errors.add(:user_list)
else
if user == User.current_user
# current_user will accept, when he puts himself to the list of users
self.assignments.build :user => user, :accepted => true
else
# normal assignement
self.assignments.build :user => user
end
end
end
end
end
def user_list
@user_list ||= users.collect(&:nick).join(", ")
end
end