58 lines
1.6 KiB
Ruby
58 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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class Feed
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def initialize(type, account)
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@type = type
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@account = account
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end
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def get(limit, max_id = nil, since_id = nil)
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max_id = '+inf' if max_id.blank?
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since_id = '-inf' if since_id.blank?
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unhydrated = redis.zrevrangebyscore(key, "(#{max_id}", "(#{since_id}", limit: [0, limit], with_scores: true).map(&:last).map(&:to_i)
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# If we're after most recent items and none are there, we need to precompute the feed
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if unhydrated.empty? && max_id == '+inf' && since_id == '-inf'
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RegenerationWorker.perform_async(@account.id, @type)
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@statuses = Status.send("as_#{@type}_timeline", @account).paginate_by_max_id(limit, nil, nil)
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else
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status_map = cache(unhydrated)
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@statuses = unhydrated.map { |id| status_map[id] }.compact
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end
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@statuses
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end
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private
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def cache(ids)
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raw = Status.where(id: ids).to_a
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uncached_ids = []
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cached_keys_with_value = Rails.cache.read_multi(*raw.map(&:cache_key))
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raw.each do |status|
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uncached_ids << status.id unless cached_keys_with_value.key?(status.cache_key)
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end
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unless uncached_ids.empty?
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uncached = Status.where(id: uncached_ids).with_includes.map { |s| [s.id, s] }.to_h
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uncached.values.each do |status|
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Rails.cache.write(status.cache_key, status)
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end
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end
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cached = cached_keys_with_value.values.map { |s| [s.id, s] }.to_h
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cached.merge!(uncached) unless uncached_ids.empty?
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cached
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end
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def key
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FeedManager.instance.key(@type, @account.id)
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end
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def redis
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Redis.current
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end
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end
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