82 lines
2.8 KiB
Ruby
82 lines
2.8 KiB
Ruby
# frozen_string_literal: true
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#
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# Copyright (C) 2013 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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class GradesPresenter
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def initialize(enrollments)
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@enrollments = enrollments
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end
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def student_enrollments
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@student_enrollments ||= current_enrollments.select(&:student?).index_by(&:course)
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end
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def observed_enrollments
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@observed_enrollments ||= observer_enrollments.map do |e|
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e.shard.activate do
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StudentEnrollment.active.where(user_id: e.associated_user_id, course_id: e.course_id).first
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end
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end.uniq.compact
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end
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def course_grade_summaries
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@course_grade_summaries ||= begin
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summaries = {}
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Shard.partition_by_shard(teacher_enrollments) do |sharded_enrollments|
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# This should probably be rewritten to index by the courses' global_id, but that would require changes else
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# where in the presenter as well.
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summaries.merge!(
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CourseScoreStatistic.where(course_id: sharded_enrollments.map(&:course_id)).index_by(&:course_id)
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)
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end
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# The erb that uses this expects a value for all course ids in the hash. Since they aren't interesting enough to
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# store, we'll make them the empty case default value for the hash. Since its only used in a read only capacity
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# they can be all the exact same object.
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summaries.each_with_object(Hash.new({ score: nil, students: 0 })) do |(key, value), memo|
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memo[key] = value.grades_presenter_hash
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end
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end
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end
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def teacher_enrollments
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@teacher_enrollments ||= current_enrollments.select(&:instructor?).index_by(&:course).values
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end
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def prior_enrollments
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[]
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end
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def has_single_enrollment?
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student_enrollments.length + teacher_enrollments.length + observed_enrollments.length == 1
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end
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def single_enrollment
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student_enrollments.values.first || teacher_enrollments.first || observed_enrollments.first
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end
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private
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def observer_enrollments
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@observer_enrollments ||= current_enrollments.select { |e| e.is_a?(ObserverEnrollment) && e.associated_user_id }
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end
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def current_enrollments
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@current_enrollments ||= @enrollments.select { |e| e.state_based_on_date == :active }
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end
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end
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