article.rb

class Article < ActiveRecord::Base
  belongs_to :employee, :foreign_key => :employee_id
  # require gem globalize3
  translates :title, :content, :permalink, :keyword, :description
  
  attr_accessible :title, :content, :keyword, :description, :published_at, :published, :comment_status, :employee_id, :status

  before_validation :define_permalink
  validates_presence_of :title, :content, :keyword, :description, :published_at

  scope :published_at, where("published_at <= ?", Time.now)
  scope :published, where(:status => 1)

  #def name
  #  title
  #end

  def to_param
    permalink
  end


  #previous link in article show view
  def previous
    Article.where('status = ? AND created_at <= ? AND id < ?', true, created_at, id).order('created_at DESC, id DESC').first
  end

  #next link in article show view
  def next
    Article.where('status = ? AND created_at >= ? AND id > ?', true, created_at, id).order('created_at ASC, id ASC').first
  end


  private

  def define_permalink
    unless self.title.nil?
      #self.permalink = self.name.downcase.gsub(/[^a-z0-9]+/i, '-')
      self.permalink = to_permalink(self.title)
      change_permalink(self.permalink)
    end
  end

  def to_permalink(str)
    str = ActiveSupport::Multibyte::Chars.new(str)
    str = str.normalize(:kd).gsub(/[^\x00-\x7F]/, '').to_s
    str.gsub!(/'/, "")
    str.gsub!(/[^-\w\d]+/sim, "-")
    str.gsub!(/-+/sm, "-")
    str.gsub!(/^-?(.*?)-?$/, '\1')
    str.downcase!
    str
  end

  # Change the name if it's already use in database
  def define_name(name)
    i = 1
    while not self.valid?
      self.name = name + "-#{i}"
      i += 1
    end
  end

  # Change the permalink if it's denied
  def change_permalink(permalink)
    base_permalink = permalink
    i = 1
    while permalink_already_use
      #while ensure_permalink_is_not_a_route || permalink_already_use
      self.permalink = base_permalink + "-#{i}"
      i += 1
    end
  end

  # Say if the permalink is already use or not. If the permalink is already use
  # see if the permalink is not use by our own object
  def permalink_already_use
    if self.id.nil?
      !Article.with_translations(I18n.locale).find_by_permalink(self.permalink).nil?
    else
      !Article.with_translations(I18n.locale).find_by_permalink(self.permalink, :conditions => ['id <> ?', self.id]).nil?
    end
  end

  # Check if the permalink is possible for the URL /footer_pages/#{permalink}
  # a permalinks static variable is use for performance, because the collect
  # of routing is longer
  #def ensure_permalink_is_not_a_route
  #  @@permalinks ||= Dacanocms::Application.routes.draw.collect { |r|
  #    r.segments.last.string_structure(r.segments[0..-2]).match(/"\/articles\/([\w]+)/)[1] rescue nil
  #  }.uniq.compact
  #  @@permalinks.each { |p| Rails.logger.debug p}
  #  @@permalinks.include?(permalink)
  #end


end