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