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mastodon/app/models/feed.rb

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class Feed
def initialize(type, account)
@type = type
@account = account
end
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def get(limit, max_id = nil, since_id = nil)
max_id = '+inf' if max_id.blank?
since_id = '-inf' if since_id.blank?
unhydrated = redis.zrevrangebyscore(key, "(#{max_id}", "(#{since_id}", limit: [0, limit], with_scores: true).collect(&:last).map(&:to_i)
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status_map = {}
# If we're after most recent items and none are there, we need to precompute the feed
if unhydrated.empty? && max_id == '+inf'
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PrecomputeFeedService.new.call(@type, @account, limit)
else
Status.where(id: unhydrated).with_includes.with_counters.each { |status| status_map[status.id] = status }
unhydrated.map { |id| status_map[id] }.compact
end
end
private
def key
FeedManager.instance.key(@type, @account.id)
end
def redis
$redis
end
end