#  fq
class WatchersOfProjects < ActiveRecord::Base
  attr_accessible :project_id, :user_id
  belongs_to :project
  belongs_to :user

  validate :validate_user
  validate :validate_project
  validates_uniqueness_of :user_id, :scope => :project_id
  validates_presence_of :user_id, :project_id
  
  def self.watch(user_id, project_id)
    @new_watch = WatchersOfProjects.new
    @new_watch.user_id = user_id
    @new_watch.project_id = project_id
    @new_watch.save
    true
  end
  
  def self.watcher_count(project)
    @project = project
    @count = @project.watchers_of_projects.count
    @count
  end
  
  def self.is_watched(user_id, project_id)
    @is_watched = self.where("user_id = ? and project_id = ?", user_id, project_id).to_a.first
    if @is_watched.nil?
      false
    else
      true
    end
  end
  
  def self.watch_cancle(user_id, project_id)
    self.delete_all(["user_id = ? and project_id = ?", user_id, project_id])
    true
  end
  
  def validate_user
    errors.add :user_id, :invalid if user.nil? || !user.active?
  end
  
  def validate_project
    errors.add :project_id, :invalid if project.nil?
  end
end