78 lines
2.4 KiB
Ruby
78 lines
2.4 KiB
Ruby
#
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# Copyright (C) 2013 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 FeatureFlag < ActiveRecord::Base
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attr_accessible :feature, :state, :locking_account
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belongs_to :context, polymorphic: true
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belongs_to :locking_account, class_name: 'Account'
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validate :valid_state, :feature_applies, :locking_account_in_chain
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before_save :check_cache
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before_destroy :clear_cache
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def default?
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false
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end
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def hidden?
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false
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end
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def enabled?
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state == 'on'
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end
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def allowed?
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state == 'allowed'
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end
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def locked?(query_context, current_user = nil)
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locking_account.present? && (current_user.blank? || !locking_account.grants_right?(current_user, :manage_feature_flags)) ||
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!allowed? && (context_id != query_context.id || context_type != query_context.class.name)
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end
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def clear_cache
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connection.after_transaction_commit { Rails.cache.delete(self.context.feature_flag_cache_key(feature)) } if self.context
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end
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private
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def valid_state
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errors.add(:state, "is not valid in context") unless %w(off on).include?(state) || context.is_a?(Account) && state == 'allowed'
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end
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def feature_applies
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errors.add(:feature, "is not valid in context") unless Feature.feature_applies_to_object(feature, context)
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end
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def locking_account_in_chain
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if locking_account_id.present?
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account = if context.respond_to?(:parent_account)
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context.parent_account || Account.site_admin
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else
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context.account
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end
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account_chain_ids = account.account_chain(include_site_admin: true).map(&:id)
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errors.add(:locking_account_id, "not in account chain") unless account_chain_ids.include?(locking_account_id)
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end
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end
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def check_cache
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clear_cache if self.changed?
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end
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end
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