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class Feed
def initialize(type, account)
@type = type
@account = account
end
def get(limit, offset = 0)
unhydrated = redis.zrevrange(key, offset, limit)
status_map = Hash.new
# If we're after most recent items and none are there, we need to precompute the feed
return PrecomputeFeedService.new.(@type, @account).take(limit) if unhydrated.empty? && offset == 0
Status.where(id: unhydrated).with_includes.with_counters.each { |status| status_map[status.id.to_s] = status }
return unhydrated.map { |id| status_map[id] }.compact
end
private
def key
"feed:#{@type}:#{@account.id}"
end
def redis
$redis
end
end
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