gift_exchange.rb

class GiftExchange < ActiveRecord::Base
  PROMPT_TYPES = %w(requests offers)  
  include ChallengeCore
  
  override_datetime_setters
  
  belongs_to :collection
  has_one :collection, :as => :challenge 

  attr_protected :signup_instructions_general_sanitizer_version
  attr_protected :signup_instructions_requests_sanitizer_version
  attr_protected :signup_instructions_offers_sanitizer_version

  # limits the kind of prompts users can submit 
  belongs_to :prompt_restriction, :class_name => "PromptRestriction", :dependent => :destroy  
  accepts_nested_attributes_for :prompt_restriction

  belongs_to :request_restriction, :class_name => "PromptRestriction", :dependent => :destroy  
  accepts_nested_attributes_for :request_restriction

  belongs_to :offer_restriction, :class_name => "PromptRestriction", :dependent => :destroy
  accepts_nested_attributes_for :offer_restriction

  belongs_to :potential_match_settings, :dependent => :destroy
  accepts_nested_attributes_for :potential_match_settings

  validates_length_of :signup_instructions_general, :signup_instructions_requests, :signup_instructions_offers, { 
    :allow_blank => true,
    :maximum => ArchiveConfig.INFO_MAX, :too_long => ts("must be less than %{max} letters long.", :max => ArchiveConfig.INFO_MAX)
  }

  PROMPT_TYPES.each do |type|
    %w(required allowed).each do |setting|
      prompt_limit_field = "#{type}_num_#{setting}"
      validates_numericality_of prompt_limit_field, :only_integer => true, :less_than_or_equal_to => ArchiveConfig.PROMPTS_MAX, :greater_than_or_equal_to => 0
    end
  end

  before_validation :update_allowed_values
  def update_allowed_values
    %w(request offer).each do |prompt_type|
      required = eval("#{prompt_type}s_num_required")
      allowed = eval("#{prompt_type}s_num_allowed")
      if required > allowed
        eval("#{prompt_type}s_num_allowed = required")
      end
    end
  end

  #FIXME hack because time zones are being html encoded. couldn't figure out why.
  before_save :fix_time_zone
  
  after_save :copy_tag_set_from_offer_to_request
  def copy_tag_set_from_offer_to_request
    if self.offer_restriction
      self.request_restriction.set_owned_tag_sets(self.offer_restriction.owned_tag_sets)

      # copy the tag-set-based restriction settings 
      self.request_restriction.character_restrict_to_fandom = self.offer_restriction.character_restrict_to_fandom
      self.request_restriction.relationship_restrict_to_fandom = self.offer_restriction.relationship_restrict_to_fandom      
      self.request_restriction.character_restrict_to_tag_set = self.offer_restriction.character_restrict_to_tag_set
      self.request_restriction.relationship_restrict_to_tag_set = self.offer_restriction.relationship_restrict_to_tag_set      
      self.request_restriction.save
    end
  end
  
  # override core
  def allow_name_change?
    false
  end
  
  def topmost_tag_type
    self.request_restriction.topmost_tag_type
  end

  def user_allowed_to_see_requests_summary?(user)
    self.collection.user_is_maintainer?(user) || self.requests_summary_visible?
  end
  
  def user_allowed_to_see_prompt?(user, prompt)
    self.collection.user_is_maintainer?(user) || prompt.pseud.user == user
  end
end