class PostFlag < ActiveRecord::Base
  class Error < Exception ; end
  
  belongs_to :creator, :class_name => "User"
  belongs_to :post
  validates_presence_of :reason, :creator_id, :creator_ip_addr
  validate :validate_creator_is_not_limited
  validate :validate_post_is_active
  before_validation :initialize_creator, :on => :create
  validates_uniqueness_of :creator_id, :scope => :post_id, :message => "has already flagged this post"
  before_save :update_post
  scope :resolved, where(["is_resolved = ?", true])
  scope :unresolved, where(["is_resolved = ?", false])
  
  def update_post
    post.update_column(:is_flagged, true)
  end
  
  def validate_creator_is_not_limited
    if flag_count_for_creator >= 10
      errors[:creator] << "can flag 10 posts a day"
      false
    else
      true
    end
  end
  
  def validate_post_is_active
    if post.is_deleted?
      errors[:post] << "is deleted"
      false
    else
      true
    end
  end
  
  def initialize_creator
    self.creator_id = CurrentUser.id
    self.creator_ip_addr = CurrentUser.ip_addr
  end
  
  def resolve!
    update_column(:is_resolved, true)
  end
  
  def flag_count_for_creator
    PostAppeal.for_user(creator_id).recent.count
  end
end