class PostApproval < ApplicationRecord
  belongs_to :user
  belongs_to :post, inverse_of: :approvals

  validate :validate_approval
  after_create :approve_post

  def validate_approval
    if post.is_status_locked?
      errors.add(:post, "is locked and cannot be approved")
    end

    if post.status == "active"
      errors.add(:post, "is already active and cannot be approved")
    end

    if post.uploader == user
      errors.add(:base, "You cannot approve a post you uploaded")
    end

    if post.approved_by?(user)
      errors.add(:base, "You have previously approved this post and cannot approve it again")
    end
  end

  def approve_post
    ModAction.log("undeleted post ##{post_id}",:post_undelete) if post.is_deleted

    post.flags.each(&:resolve!)
    post.update(approver: user, is_flagged: false, is_pending: false, is_deleted: false)
  end

  concerning :SearchMethods do
    class_methods do
      def post_tags_match(query)
        PostQueryBuilder.new(query).build(self.joins(:post))
      end

      def search(params)
        q = super
        params[:user_id] = User.name_to_id(params[:user_name]) if params[:user_name]

        if params[:post_tags_match].present?
          q = q.post_tags_match(params[:post_tags_match])
        end

        q = q.attribute_matches(:user_id, params[:user_id])
        q = q.attribute_matches(:post_id, params[:post_id])

        q.apply_default_order(params)
      end
    end
  end
end