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Website : rimsha.abasa.com
: / var / canvas / app / presenters /
Filename : mark_done_presenter.rb
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# frozen_string_literal: true

#
# Copyright (C) 2015 - 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 MarkDonePresenter
  attr_reader :module, :item

  def initialize(ctrl, context, module_item_id, user, asset)
    @ctrl = ctrl
    @context = context
    @asset = asset
    module_item_id = use_or_infer_item_id(module_item_id)
    @item = ContentTag.find(module_item_id.to_i) if module_item_id.to_i != 0
    @module = @item.context_module if @item
    @user = user
  end

  def use_or_infer_item_id(item_id)
    return item_id if item_id.present? && item_id.respond_to?(:to_i)

    item_context = case @context
                   when Course
                     @context
                   when Group
                     @context.context
                   end
    return unless item_context.is_a?(Course)

    item_ids = GuardRail.activate(:secondary) { item_context.module_items_visible_to(@user).where(content_type: @asset.class.name, content_id: @asset.id).reorder(nil).pluck(:id) }
    item_ids.first if item_ids.count == 1
  end

  def has_requirement?
    return false unless @module
    return false unless @context.grants_any_right?(@user, @ctrl.session, :participate_as_student)

    requirements = @module.completion_requirements
    requirement = requirements.find { |i| i[:id] == @item.id }
    return false unless requirement

    requirement[:type] == "must_mark_done"
  end

  def checked?
    return false unless has_requirement?

    progression = if @module.context_module_progressions.loaded?
                    @module.context_module_progressions.find { |p| p[:user_id] == @user.id }
                  else
                    @module.context_module_progressions.where(user_id: @user.id).first
                  end
    return false unless progression

    !!progression.requirements_met.find { |r| r[:id] == @item.id && r[:type] == "must_mark_done" }
  end

  def api_url
    @ctrl.api_v1_course_context_module_item_done_path(course_id: @context.id,
                                                      module_id: @item.context_module_id,
                                                      id: @item.id)
  end
end