62 lines
1.9 KiB
Ruby
62 lines
1.9 KiB
Ruby
#
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# Copyright (C) 2012 - 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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#
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class ContentParticipation < ActiveRecord::Base
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include Workflow
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ACCESSIBLE_ATTRIBUTES = [:content, :user, :workflow_state].freeze
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belongs_to :content, polymorphic: [:submission]
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belongs_to :user
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after_save :update_participation_count
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validates_presence_of :content_type, :content_id, :user_id, :workflow_state
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workflow do
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state :unread
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state :read
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end
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def self.create_or_update(opts={})
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opts = opts.with_indifferent_access
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content = opts.delete(:content)
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user = opts.delete(:user)
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return nil unless user && content
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participant = nil
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unique_constraint_retry do
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participant = content.content_participations.where(:user_id => user).first
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participant ||= content.content_participations.build(:user => user, :workflow_state => "unread")
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participant.attributes = opts.slice(*ACCESSIBLE_ATTRIBUTES)
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participant.save if participant.new_record? || participant.changed?
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end
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participant
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end
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def update_participation_count
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return unless workflow_state_changed?
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ContentParticipationCount.create_or_update({
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:context => content.context,
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:user => user,
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:content_type => content_type,
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:offset => (workflow_state == "unread" ? 1 : -1),
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})
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end
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end
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