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Filename : planner_helper.rb
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# frozen_string_literal: true

#
# Copyright (C) 2017 - 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 PlannerHelper
  PLANNABLE_TYPES = {
    "discussion_topic" => "DiscussionTopic",
    "announcement" => "Announcement",
    "quiz" => "Quizzes::Quiz",
    "assignment" => "Assignment",
    "wiki_page" => "WikiPage",
    "planner_note" => "PlannerNote",
    "calendar_event" => "CalendarEvent",
    "assessment_request" => "AssessmentRequest"
  }.freeze

  class << self
    def planner_meta_cache_key(user)
      ["planner_items_meta", user].cache_key
    end

    def get_planner_cache_id(user)
      Rails.cache.fetch(planner_meta_cache_key(user), expires_in: 1.week) do
        SecureRandom.uuid
      end
    end

    def clear_planner_cache(user)
      Rails.cache.delete(planner_meta_cache_key(user))
    end

    # Handles real Submissions associated with graded things
    def complete_planner_override_for_submission(submission)
      planner_override = find_planner_override_for_submission(submission)
      complete_planner_override planner_override
    end

    # Ungraded surveys are submitted as a Quizzes::QuizSubmission that
    # had no submission attribute pointing to a real Submission
    def complete_planner_override_for_quiz_submission(quiz_submission)
      return if quiz_submission.submission # handled by Submission model

      planner_override = PlannerOverride.find_or_create_by(
        plannable_id: quiz_submission.quiz_id,
        plannable_type: PLANNABLE_TYPES["quiz"],
        user_id: quiz_submission.user_id
      )
      complete_planner_override planner_override
    end

    def complete_planner_override(planner_override)
      return unless planner_override.is_a? PlannerOverride

      planner_override.update(marked_complete: true)
      clear_planner_cache(planner_override&.user)
    end

    private

    # until the graded objects are handled more uniformly,
    # we have to look around for an associated override
    def find_planner_override_for_submission(submission)
      return unless submission.respond_to?(:submission_type) && submission.respond_to?(:assignment_id)

      planner_override = case submission.submission_type
                         when "discussion_topic"
                           discussion_topic_id = DiscussionTopic.find_by(assignment_id: submission.assignment_id)&.id
                           PlannerOverride.find_by(
                             plannable_id: discussion_topic_id,
                             plannable_type: PLANNABLE_TYPES["discussion_topic"],
                             user_id: submission.user_id
                           )
                         when "online_quiz"
                           quiz_id = Quizzes::Quiz.find_by(assignment_id: submission.assignment_id)&.id
                           PlannerOverride.find_by(
                             plannable_id: quiz_id,
                             plannable_type: PLANNABLE_TYPES["quiz"],
                             user_id: submission.user_id
                           )
                         end
      planner_override ||= PlannerOverride.find_by(
        plannable_id: submission.assignment_id,
        plannable_type: PLANNABLE_TYPES["assignment"],
        user_id: submission.user_id
      )
      planner_override
    end
  end
end