user_serializer.rb

# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
# Departamento de Informatica - Universidade Federal do Parana
#
# This file is part of portalmec.
#
# portalmec 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, either version 3 of the License, or
# (at your option) any later version.
#
# portalmec 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 portalmec.  If not, see <http://www.gnu.org/licenses/>.

class UserSerializer < ActiveModel::Serializer
  cache key: 'user', expires_in: 4.hours, except: [:email, :complained, :followed, :level, :level_xp, :experience, :points ]

  def complained
    object.complained? current_user
  end

  def followed
    current_user.try( :following?, object)
  end

  def email
    object.email if is_current_user?
  end

  def learning_objects_count
    object.learning_objects.where('state = ?', LearningObject.states[:published]).count
  end

  def role_ids
    roles = []
    object.roles.each { |role| roles << role.id }
    roles
  end

  def dspace_handle
    object.dspace_handle if is_current_user?
  end

  def dspace_url
    object.dspace_url if is_current_user?
  end

  def dspace_sets
    object.dspace_sets if is_current_user?
  end

  def cpf
    object.cpf if is_current_user? || is_supervisor?
  end

  def school
    object.school if is_current_user? || is_supervisor?
  end

  def is_current_user?
    (!current_user.nil?)&&(object.id == current_user.id || current_user.can_edit?)
  end

  def is_supervisor?
    !current_user.nil? && current_user.is_supervisor?
  end

  def level_xp
    object.xp_to_level(object.level + 1)
  end

  def user_items
    items = object.user_items.where(being_used: true)
    ActiveModel::SerializableResource.new(items, {scope: current_user, scope_name: :current_user, each_serializer: ::UserItemSerializer}).serializable_hash
  end


  attributes \
      :id,
      :email,
      :provider,
      :cpf,
      :name,
      :description,
      :submitter_request,
      :education,
      :score,
      :cover,
      :role_ids,
      :institution_ids,
      :avatar,
      :dspace_url,
      :dspace_handle,
      :dspace_sets,
      :likes_count,
      :followed,
      :complained,
      :follows_count,
      :learning_objects_count,
      :collections_count,
      :created_at,
      :updated_at,
      :terms_accepted_at,
      :state,
      :level,
      :level_xp,
      :experience,
      :points,
      :last_action_at,
      :streak,
      :high_streak

  attribute \
      :times_blocked, if: :is_current_user?

  attribute \
      :suspended_at, if: :is_current_user?

  attribute \
      :reactivated_at, if: :is_current_user?

  attribute \
      :ask_teacher_question, if: :is_current_user?

  belongs_to :school
  has_many :subjects
  has_many :roles
  has_many :institutions
  has_many :user_items
end