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# Redmine - project management software

# Copyright (C) 2006-2012  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 News < ActiveRecord::Base

  include Redmine::SafeAttributes

  belongs_to :project

  belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'

  has_many :comments, :as => :commented, :dependent => :delete_all, :order => "created_on"

  validates_presence_of :title, :description

  validates_length_of :title, :maximum => 60

  validates_length_of :summary, :maximum => 255

  acts_as_attachable :delete_permission => :manage_news

  acts_as_searchable :columns => ['title', 'summary', "#{table_name}.description"], :include => :project

  acts_as_event :url => Proc.new {|o| {:controller => 'news', :action => 'show', :id => o.id}}

  acts_as_activity_provider :find_options => {:include => [:project, :author]},

                            :author_key => :author_id

  acts_as_watchable

  after_create :add_author_as_watcher

  scope :visible, lambda {|*args| {

    :include => :project,

    :conditions => Project.allowed_to_condition(args.shift || User.current, :view_news, *args)

  }}

  safe_attributes 'title', 'summary', 'description'

  def visible?(user=User.current)

    !user.nil? && user.allowed_to?(:view_news, project)

  end

  # Returns true if the news can be commented by user

  def commentable?(user=User.current)

    user.allowed_to?(:comment_news, project)

  end

  # returns latest news for projects visible by user

  def self.latest(user = User.current, count = 5)

    visible(user).includes([:author, :project]).order("#{News.table_name}.created_on DESC").limit(count).all

  end

  private

  def add_author_as_watcher

    Watcher.create(:watchable => self, :user => author)

  end

  # returns latest news for a specific project

  def self.latest_for(project, count = 5)

    find(:all, :limit => count, :conditions => [ "#{News.table_name}.project_id = #{project.id}", Project.allowed_to_condition(User.current, :view_news) ], :include => [ :author, :project ], :order => "#{News.table_name}.created_on DESC") 

  end

end