class Question < ActiveRecord::Base
  attr_accessible :crowd_id, :question_type, :body, :priority, :choices_attributes

  belongs_to :crowd

  has_many :choices

  accepts_nested_attributes_for(
    :choices,
    :reject_if => lambda{ |c| c[:body].blank? }
  )

  validates_presence_of :crowd_id, :body, :question_type

  TYPES = {
    'True/False' => 'boolean',
    'Poll' => 'poll',
    'Score' => 'score',
    'Video' => 'video'
  }


  ## Class Methods ##

  # Convenience method for creating a new question
  # Returns: a saved Question object
  # NOTE: this method should be used throughout the app
  #       whenever a new question needs to be created
  def self.set(params={})
    q = (id = params[:id]) ? Question.find(id) : Question.new

    params.each do |k, v|
      q.send("#{k}=", v)
    end

    q.save!

    return q
  end


  ## Instance methods ##

  # Add a question the given user's question queue
  # Requires: a User object
  # Returns: boolean
  def add_user(user, params={})
    params = {
      :question => self,
      :user => user
    }
    QuestionQueue.set(params)
  end