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context_module_item.rb
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# frozen_string_literal: true # # Copyright (C) 2012 - 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/>. # # This isn't a record on its own, but a module included in other records such # as Attachment and Assignment. # # ContextModules contain items indirectly, through ContentTags that contain the # information on position in the module, progression requirements, etc. module ContextModuleItem # set up the association for the AR class that included this module def self.included(klass) klass.has_many :context_module_tags, -> { where("content_tags.tag_type='context_module' AND content_tags.workflow_state<>'deleted'").preload(:context_module) }, as: :content, inverse_of: :content, class_name: "ContentTag" klass.has_many :context_modules, -> { distinct }, through: :context_module_tags end # Check if this item is locked for the given user. # If we are locked, this will return the module item (ContentTag) that is # locking the item for the given user def locked_by_module_item?(user, opts = {}) if context_module_tags.present? && context_module_tags.all? { |tag| tag.locked_for?(user, opts) } item = context_module_tags.first end item || false end # searches the ContextModuleItems in objs_to_search, in order, for the first # context module tag -- returns the tag with id preferred_id if given and it # exists # # If no preferred is found, but more than one tag exists for the same obj, we # return nothing, since we can't know which tag is appropriate to return. def self.find_tag_with_preferred(objs_to_search, preferred_id) preferred_id = preferred_id[Api::ID_REGEX] if preferred_id.is_a?(String) objs_to_search.each do |obj| next unless obj.present? tag = obj.context_module_tags.where(id: preferred_id).first return tag if tag end objs_to_search.each do |obj| next unless obj.present? tags = obj.context_module_tags.to_a return nil if tags.size > 1 tag = tags.first return tag if tag end nil end end