# frozen_string_literal: true

#
# Copyright (C) 2011 - present Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.

class Favorite < ActiveRecord::Base
  belongs_to :context, polymorphic: [:course, :group], inverse_of: :favorites
  belongs_to :user
  belongs_to :root_account, class_name: "Account", inverse_of: :favorites
  validates :context_type, inclusion: { allow_nil: true, in: ["Course", "Group"].freeze }
  scope :by, ->(type) { where(context_type: type) }

  before_create :populate_root_account_id
  after_save :touch_user

  def touch_user
    self.class.connection.after_transaction_commit { user.touch }
  end

  def populate_root_account_id
    self.root_account = context.root_account
  end

  def self.create_or_find_by(user:, context:)
    new(user:, context:).insert(on_conflict: -> { user.favorites.find_by(context:) })
  end
end
