scope = scope.unreviewed if filter_params[:review] == 'unreviewed'
scope = scope.reviewed.order(reviewed_at: :desc) if filter_params[:review] == 'reviewed'
scope = scope.pending_review.order(requested_review_at: :desc) if filter_params[:review] == 'pending_review'
- scope.order(score: :desc)
+ scope.order(max_score: :desc)
end
def filter_params
reblog_key = key(type, account_id, 'reblogs')
# Remove any items past the MAX_ITEMS'th entry in our feed
- redis.zremrangebyrank(timeline_key, '0', (-(FeedManager::MAX_ITEMS + 1)).to_s)
+ redis.zremrangebyrank(timeline_key, 0, -(FeedManager::MAX_ITEMS + 1))
# Get the score of the REBLOG_FALLOFF'th item in our feed, and stop
# tracking anything after it for deduplication purposes.
# name :string default(""), not null
# created_at :datetime not null
# updated_at :datetime not null
-# score :integer
# usable :boolean
# trendable :boolean
# listable :boolean
# reviewed_at :datetime
# requested_review_at :datetime
# last_status_at :datetime
-# last_trend_at :datetime
+# max_score :float
+# max_score_at :datetime
#
class Tag < ApplicationRecord
THRESHOLD = 5
LIMIT = 10
REVIEW_THRESHOLD = 3
+ MAX_SCORE_COOLDOWN = 3.days.freeze
+ MAX_SCORE_HALFLIFE = 6.hours.freeze
class << self
include Redisable
increment_historical_use!(tag.id, at_time)
increment_unique_use!(tag.id, account.id, at_time)
- increment_vote!(tag, at_time)
+ increment_use!(tag.id, at_time)
tag.update(last_status_at: Time.now.utc) if tag.last_status_at.nil? || tag.last_status_at < 12.hours.ago
- tag.update(last_trend_at: Time.now.utc) if trending?(tag) && (tag.last_trend_at.nil? || tag.last_trend_at < 12.hours.ago)
+ end
+
+ def update!(at_time = Time.now.utc)
+ tag_ids = redis.smembers("#{KEY}:used:#{at_time.beginning_of_day.to_i}") + redis.zrange(KEY, 0, -1)
+ tags = Tag.where(id: tag_ids.uniq)
+
+ # First pass to calculate scores and update the set
+
+ tags.each do |tag|
+ expected = redis.pfcount("activity:tags:#{tag.id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts").to_f
+ expected = 1.0 if expected.zero?
+ observed = redis.pfcount("activity:tags:#{tag.id}:#{at_time.beginning_of_day.to_i}:accounts").to_f
+ max_time = tag.max_score_at
+ max_score = tag.max_score
+ max_score = 0 if max_time.nil? || max_time < (at_time - MAX_SCORE_COOLDOWN)
+
+ score = begin
+ if expected > observed || observed < THRESHOLD
+ 0
+ else
+ ((observed - expected)**2) / expected
+ end
+ end
+
+ if score > max_score
+ max_score = score
+ max_time = at_time
+
+ # Not interested in triggering any callbacks for this
+ tag.update_columns(max_score: max_score, max_score_at: max_time)
+ end
+
+ decaying_score = max_score * (0.5**((at_time.to_f - max_time.to_f) / MAX_SCORE_HALFLIFE.to_f))
+
+ if decaying_score.zero?
+ redis.zrem(KEY, tag.id)
+ else
+ redis.zadd(KEY, decaying_score, tag.id)
+ end
+ end
+
+ users_for_review = User.staff.includes(:account).to_a.select(&:allows_trending_tag_emails?)
+
+ # Second pass to notify about previously unreviewed trends
+
+ tags.each do |tag|
+ current_rank = redis.zrevrank(KEY, tag.id)
+ needs_review_notification = tag.requires_review? && !tag.requested_review?
+ rank_passes_threshold = current_rank.present? && current_rank <= REVIEW_THRESHOLD
+
+ next unless !tag.trendable? && rank_passes_threshold && needs_review_notification
+
+ tag.touch(:requested_review_at)
+
+ users_for_review.each do |user|
+ AdminMailer.new_trending_tag(user.account, tag).deliver_later!
+ end
+ end
+
+ # Trim older items
+
+ redis.zremrangebyrank(KEY, 0, -(LIMIT + 1))
end
def get(limit, filtered: true)
- tag_ids = redis.zrevrange("#{KEY}:#{Time.now.utc.beginning_of_day.to_i}", 0, LIMIT - 1).map(&:to_i)
+ tag_ids = redis.zrevrange(KEY, 0, LIMIT - 1).map(&:to_i)
tags = Tag.where(id: tag_ids)
tags = tags.where(trendable: true) if filtered
end
def trending?(tag)
- rank = redis.zrevrank("#{KEY}:#{Time.now.utc.beginning_of_day.to_i}", tag.id)
- rank.present? && rank <= LIMIT
+ rank = redis.zrevrank(KEY, tag.id)
+ rank.present? && rank < LIMIT
end
private
redis.expire(key, EXPIRE_HISTORY_AFTER)
end
- def increment_vote!(tag, at_time)
- key = "#{KEY}:#{at_time.beginning_of_day.to_i}"
- expected = redis.pfcount("activity:tags:#{tag.id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts").to_f
- expected = 1.0 if expected.zero?
- observed = redis.pfcount("activity:tags:#{tag.id}:#{at_time.beginning_of_day.to_i}:accounts").to_f
-
- if expected > observed || observed < THRESHOLD
- redis.zrem(key, tag.id)
- else
- score = ((observed - expected)**2) / expected
- old_rank = redis.zrevrank(key, tag.id)
-
- redis.zadd(key, score, tag.id)
- request_review!(tag) if (old_rank.nil? || old_rank > REVIEW_THRESHOLD) && redis.zrevrank(key, tag.id) <= REVIEW_THRESHOLD && !tag.trendable? && tag.requires_review? && !tag.requested_review?
- end
-
- redis.expire(key, EXPIRE_TRENDS_AFTER)
- end
-
- def request_review!(tag)
- return unless Setting.trends
-
- tag.touch(:requested_review_at)
-
- User.staff.includes(:account).find_each { |u| AdminMailer.new_trending_tag(u.account, tag).deliver_later! if u.allows_trending_tag_emails? }
+ def increment_use!(tag_id, at_time)
+ key = "#{KEY}:used:#{at_time.beginning_of_day.to_i}"
+ redis.sadd(key, tag_id)
+ redis.expire(key, EXPIRE_HISTORY_AFTER)
end
end
end
--- /dev/null
+# frozen_string_literal: true
+
+class Scheduler::TrendingTagsScheduler
+ include Sidekiq::Worker
+
+ sidekiq_options unique: :until_executed, retry: 0
+
+ def perform
+ TrendingTags.update! if Setting.trends
+ end
+end
scheduled_statuses_scheduler:
every: '5m'
class: Scheduler::ScheduledStatusesScheduler
+ trending_tags_scheduler:
+ every: '5m'
+ class: Scheduler::TrendingTagsScheduler
media_cleanup_scheduler:
cron: '<%= Random.rand(0..59) %> <%= Random.rand(3..5) %> * * *'
class: Scheduler::MediaCleanupScheduler
--- /dev/null
+class AddMaxScoreToTags < ActiveRecord::Migration[5.2]
+ def change
+ add_column :tags, :max_score, :float
+ add_column :tags, :max_score_at, :datetime
+ end
+end
--- /dev/null
+# frozen_string_literal: true
+
+class RemoveScoreFromTags < ActiveRecord::Migration[5.2]
+ disable_ddl_transaction!
+
+ def change
+ safety_assured do
+ remove_column :tags, :score, :int
+ remove_column :tags, :last_trend_at, :datetime
+ end
+ end
+end
#
# It's strongly recommended that you check this file into your version control system.
-ActiveRecord::Schema.define(version: 2019_08_23_221802) do
+ActiveRecord::Schema.define(version: 2019_09_01_040524) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
t.string "name", default: "", null: false
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
- t.integer "score"
t.boolean "usable"
t.boolean "trendable"
t.boolean "listable"
t.datetime "reviewed_at"
t.datetime "requested_review_at"
t.datetime "last_status_at"
- t.datetime "last_trend_at"
+ t.float "max_score"
+ t.datetime "max_score_at"
t.index "lower((name)::text)", name: "index_tags_on_name_lower", unique: true
end
--- /dev/null
+require 'rails_helper'
+
+RSpec.describe TrendingTags do
+ describe '.record_use!' do
+ pending
+ end
+
+ describe '.update!' do
+ let!(:at_time) { Time.now.utc }
+ let!(:tag1) { Fabricate(:tag, name: 'Catstodon') }
+ let!(:tag2) { Fabricate(:tag, name: 'DogsOfMastodon') }
+ let!(:tag3) { Fabricate(:tag, name: 'OCs') }
+
+ before do
+ allow(Redis.current).to receive(:pfcount) do |key|
+ case key
+ when "activity:tags:#{tag1.id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts"
+ 2
+ when "activity:tags:#{tag1.id}:#{at_time.beginning_of_day.to_i}:accounts"
+ 16
+ when "activity:tags:#{tag2.id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts"
+ 0
+ when "activity:tags:#{tag2.id}:#{at_time.beginning_of_day.to_i}:accounts"
+ 4
+ when "activity:tags:#{tag3.id}:#{(at_time - 1.day).beginning_of_day.to_i}:accounts"
+ 13
+ end
+ end
+
+ Redis.current.zadd('trending_tags', 0.9, tag3.id)
+ Redis.current.sadd("trending_tags:used:#{at_time.beginning_of_day.to_i}", [tag1.id, tag2.id])
+
+ tag3.update(max_score: 0.9, max_score_at: (at_time - 1.day).beginning_of_day + 12.hours)
+
+ described_class.update!(at_time)
+ end
+
+ it 'calculates and re-calculates scores' do
+ expect(described_class.get(10, filtered: false)).to eq [tag1, tag3]
+ end
+
+ it 'omits hashtags below threshold' do
+ expect(described_class.get(10, filtered: false)).to_not include(tag2)
+ end
+
+ it 'decays scores' do
+ expect(Redis.current.zscore('trending_tags', tag3.id)).to be < 0.9
+ end
+ end
+
+ describe '.trending?' do
+ let(:tag) { Fabricate(:tag) }
+
+ before do
+ 10.times { |i| Redis.current.zadd('trending_tags', i + 1, Fabricate(:tag).id) }
+ end
+
+ it 'returns true if the hashtag is within limit' do
+ Redis.current.zadd('trending_tags', 11, tag.id)
+ expect(described_class.trending?(tag)).to be true
+ end
+
+ it 'returns false if the hashtag is outside the limit' do
+ Redis.current.zadd('trending_tags', 0, tag.id)
+ expect(described_class.trending?(tag)).to be false
+ end
+ end
+end
cat aescling's git repositories / mastodon.git / commitdiff