66 lines
2.5 KiB
Ruby
66 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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#
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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 StreamItemCache < ActiveRecord::Observer
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observe :stream_item_instance
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def after_save(model)
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invalidate_recent_stream_items model
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end
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def invalidate_recent_stream_items(stream_instance)
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dashboard_key = StreamItemCache.recent_stream_items_key(stream_instance.user)
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context_key = StreamItemCache.recent_stream_items_key(stream_instance.user, stream_instance.context_type, stream_instance.context_id)
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Rails.cache.delete dashboard_key
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Rails.cache.delete context_key
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end
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def self.invalidate_recent_stream_items(user_id, context_type, context_id)
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dashboard_key = recent_stream_items_key(user_id)
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context_key = recent_stream_items_key(user_id, context_type, context_id)
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Rails.cache.delete dashboard_key
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Rails.cache.delete context_key
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end
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def self.invalidate_all_recent_stream_items(user_ids, context_type, context_id)
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user_ids.each { |user_id| invalidate_recent_stream_items(user_id, context_type, context_id) }
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end
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def self.invalidate_context_stream_item_key(context_type, context_id)
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Rails.cache.delete ["context_stream_item_key", context_type, context_id].cache_key
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end
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# Generate a cache key for User#recent_stream_items
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def self.recent_stream_items_key(user, context_type = nil, context_id = nil)
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user_id = (user.is_a?(User) ? user.id : user)
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["recent_stream_items3", user_id, context_stream_item_key(context_type, context_id)].cache_key
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end
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# Returns a cached cache key for the context with the time so all
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# stream item cache keys for a context can later be invalidated.
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def self.context_stream_item_key(context_type, context_id)
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return unless context_type
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Rails.cache.fetch(["context_stream_item_key", context_type, context_id].cache_key, use_new_rails: false) do
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"#{context_type.underscore}_#{context_id}-#{Time.now.to_i}"
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end
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end
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end
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