require 'sunspot'
require 'sunspot/rails'

class Article < ActiveRecord::Base

  cattr_reader :per_page
  @@per_page = 10

  before_validation :remove_illegal_characters

  belongs_to :infosource
  has_many :article_statuses

  has_many :was_sent_to,
    :through => :article_statuses,
    :source => :user,
    :conditions => "status = '#{ArticleStatus::STATUS_SENT}'",
    :order => :created_at

  has_many :viewed_by,
    :through => :article_statuses,
    :source => :user,
    :conditions => "status ='#{ArticleStatus::STATUS_VIEWED}'",
    :order => :created_at

  searchable do
    string :author
    text :title
    text :summary
    text :body
    string :url
    time :published_at
    dynamic_boolean :status do
      article_statuses.inject({}) do |user_statuses_hash, article_status|
        user_status_symbol = Article.give_user_status_symbol(article_status.user,
                                                             article_status.status)
        user_statuses_hash.merge(user_status_symbol => true)
      end
    end
  end

  validates_format_of :url, :with => URI::regexp(%w(http https)), :allow_nil => true
  validates_uniqueness_of :guid, :allow_nil => true

  def self.give_user_status_symbol(user, status)
    "user#{user[:id]}_status#{status}".to_sym
  end

  def size
    title.size + summary.size + body.size + url.size
  end

  def set_user_status(user, status)
    article_status = ArticleStatus.find_by_user_id_and_article_id_and_status(user, self, status)
    if article_status.nil?
      article_status = ArticleStatus.new
      article_status.user = user
      article_status.article = self
      article_status.status = status
      article_status.save!
    end
    self.touch
  end

  def remove_illegal_characters
    ugly_characters = "\x00-\x1F"
    exchange_character = ' '
    author.tr!(ugly_characters, exchange_character) unless author.nil?
    title.tr!(ugly_characters, exchange_character) unless title.nil?
    summary.tr!(ugly_characters, exchange_character) unless summary.nil?
    body.tr!(ugly_characters, exchange_character) unless body.nil?
    url.tr!(ugly_characters, '') unless url.nil?
  end
end