80 lines
2 KiB
Ruby
80 lines
2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Trends::Base
|
|
include Redisable
|
|
|
|
class_attribute :default_options
|
|
|
|
attr_reader :options
|
|
|
|
# @param [Hash] options
|
|
# @option options [Integer] :threshold Minimum amount of uses by unique accounts to begin calculating the score
|
|
# @option options [Integer] :review_threshold Minimum rank (lower = better) before requesting a review
|
|
# @option options [ActiveSupport::Duration] :max_score_cooldown For this amount of time, the peak score (if bigger than current score) is decayed-from
|
|
# @option options [ActiveSupport::Duration] :max_score_halflife How quickly a peak score decays
|
|
def initialize(options = {})
|
|
@options = self.class.default_options.merge(options)
|
|
end
|
|
|
|
def register(_status)
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def add(*)
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def refresh(*)
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def request_review
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def get(*)
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def score(id)
|
|
redis.zscore("#{key_prefix}:all", id) || 0
|
|
end
|
|
|
|
def rank(id)
|
|
redis.zrevrank("#{key_prefix}:allowed", id)
|
|
end
|
|
|
|
def currently_trending_ids(allowed, limit)
|
|
redis.zrevrange(allowed ? "#{key_prefix}:allowed" : "#{key_prefix}:all", 0, limit.positive? ? limit - 1 : limit).map(&:to_i)
|
|
end
|
|
|
|
protected
|
|
|
|
def key_prefix
|
|
raise NotImplementedError
|
|
end
|
|
|
|
def recently_used_ids(at_time = Time.now.utc)
|
|
redis.smembers(used_key(at_time)).map(&:to_i)
|
|
end
|
|
|
|
def record_used_id(id, at_time = Time.now.utc)
|
|
redis.sadd(used_key(at_time), id)
|
|
redis.expire(used_key(at_time), 1.day.seconds)
|
|
end
|
|
|
|
def trim_older_items
|
|
redis.zremrangebyscore("#{key_prefix}:all", '-inf', '(1')
|
|
redis.zremrangebyscore("#{key_prefix}:allowed", '-inf', '(1')
|
|
end
|
|
|
|
def score_at_rank(rank)
|
|
redis.zrevrange("#{key_prefix}:allowed", 0, rank, with_scores: true).last&.last || 0
|
|
end
|
|
|
|
private
|
|
|
|
def used_key(at_time)
|
|
"#{key_prefix}:used:#{at_time.beginning_of_day.to_i}"
|
|
end
|
|
end
|