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: / var / canvas / app / graphql / types /
Filename : learning_outcome_type.rb
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# frozen_string_literal: true

#
# Copyright (C) 2019 - 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/>.
#

module Types
  class LearningOutcomeType < ApplicationObjectType
    include OutcomesFeaturesHelper

    class AssessedLoader < GraphQL::Batch::Loader
      def perform(outcomes)
        assessed_ids = LearningOutcomeResult.active.where(learning_outcome_id: outcomes).distinct.pluck(:learning_outcome_id)
        outcomes.each do |outcome|
          fulfill(outcome, assessed_ids.include?(outcome.id))
        end
      end
    end

    class ImportedLoader < GraphQL::Batch::Loader
      def initialize(target_context_id, target_context_type)
        super()
        @target_context_id = target_context_id
        @target_context_type = target_context_type.downcase.capitalize
      end

      def perform(outcomes)
        imported_ids = ContentTag.learning_outcome_links.active
                                 .where(content_id: outcomes, context_id: @target_context_id, context_type: @target_context_type)
                                 .pluck(:content_id)

        outcomes.each do |outcome|
          fulfill(outcome, imported_ids.include?(outcome.id))
        end
      end
    end

    alias_method :outcome, :object
    implements GraphQL::Types::Relay::Node
    implements Interfaces::LegacyIDInterface
    implements Interfaces::TimestampInterface

    global_id_field :id

    field :context_id, ID, null: true
    field :context_type, String, null: true
    field :title, String, null: false
    field :description, String, null: true
    field :display_name, String, null: true
    field :vendor_guid, String, null: true

    field :calculation_method, String, null: true
    def calculation_method
      outcome.calculation_method unless account_level_mastery_scales_enabled?(outcome.context)
    end

    field :calculation_int, Integer, null: true
    def calculation_int
      outcome.calculation_int unless account_level_mastery_scales_enabled?(outcome.context)
    end

    field :mastery_points, Float, null: true
    def mastery_points
      outcome.mastery_points unless account_level_mastery_scales_enabled?(outcome.context)
    end

    field :points_possible, Float, null: true
    def points_possible
      outcome.points_possible unless account_level_mastery_scales_enabled?(outcome.context)
    end

    field :ratings, [Types::ProficiencyRatingType], null: true
    def ratings
      outcome.rubric_criterion[:ratings] unless account_level_mastery_scales_enabled?(outcome.context)
    end

    field :can_edit, Boolean, null: false
    def can_edit
      if outcome.context_id
        return outcome_context_promise.then do |context|
          context.grants_right?(current_user, session, :manage_outcomes)
        end
      end

      Account.site_admin.grants_right?(current_user, session, :manage_global_outcomes)
    end

    field :can_archive, Boolean, null: false do
      argument :context_id, ID, required: true
      argument :context_type, String, required: true
    end
    def can_archive(context_id:, context_type:)
      outcome.context_type == context_type && outcome.context_id == context_id.to_i
    end

    field :assessed, Boolean, null: false
    def assessed
      AssessedLoader.load(outcome)
    end

    field :is_imported, Boolean, null: true do
      argument :target_context_id, ID, required: true
      argument :target_context_type, String, required: true
    end
    def is_imported(**args) # rubocop:disable Naming/PredicateName
      ImportedLoader.for(args[:target_context_id], args[:target_context_type]).load(outcome)
    end

    field :friendly_description, Types::OutcomeFriendlyDescriptionType, null: true do
      argument :context_id, ID, required: true
      argument :context_type, String, required: true
    end
    def friendly_description(context_id:, context_type:)
      Loaders::OutcomeFriendlyDescriptionLoader.for(
        context_id, context_type
      ).load(
        object.id
      )
    end

    field :alignments, [Types::OutcomeAlignmentType], null: true do
      argument :context_id, ID, required: true
      argument :context_type, String, required: true
    end
    def alignments(context_id:, context_type:)
      context = get_context(context_id, context_type)
      Loaders::OutcomeAlignmentLoader.for(context).load(outcome) if context&.grants_right?(current_user, session, :manage_outcomes)
    end

    private

    def outcome_context_promise
      Loaders::AssociationLoader.for(LearningOutcome, :context).load(outcome)
    end

    def get_context(context_id, context_type)
      context_type.constantize.active.find_by(id: context_id) if ["Course", "Account"].include?(context_type)
    end
  end
end