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@@ -20,13 +20,27 @@ class Trends::Statuses < Trends::Base
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clone.filtered_for!(account)
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end
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+ def to_arel
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+ scope = Status.joins(:trend).reorder(score: :desc)
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+ scope = scope.reorder(language_order_clause.desc, score: :desc) if preferred_languages.present?
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+ scope = scope.merge(StatusTrend.allowed) if @allowed
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+ scope = scope.not_excluded_by_account(@account).not_domain_blocked_by_account(@account) if @account.present?
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+ scope = scope.offset(@offset) if @offset.present?
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+ scope = scope.limit(@limit) if @limit.present?
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+ scope
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+ end
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+
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private
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- def apply_scopes(scope)
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- if @account.nil?
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- scope
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+ def language_order_clause
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+ Arel::Nodes::Case.new.when(StatusTrend.arel_table[:language].in(preferred_languages)).then(1).else(0)
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+ end
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+
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+ def preferred_languages
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+ if @account&.chosen_languages.present?
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+ @account.chosen_languages
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else
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- scope.not_excluded_by_account(@account).not_domain_blocked_by_account(@account)
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+ @locale
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end
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end
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end
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@@ -36,9 +50,6 @@ class Trends::Statuses < Trends::Base
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end
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def add(status, _account_id, at_time = Time.now.utc)
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- # We rely on the total reblogs and favourites count, so we
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- # don't record which account did the what and when here
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-
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record_used_id(status.id, at_time)
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end
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@@ -47,18 +58,23 @@ class Trends::Statuses < Trends::Base
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end
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def refresh(at_time = Time.now.utc)
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- statuses = Status.where(id: (recently_used_ids(at_time) + currently_trending_ids(false, -1)).uniq).includes(:account, :media_attachments)
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+ statuses = Status.where(id: (recently_used_ids(at_time) + StatusTrend.pluck(:status_id)).uniq).includes(:status_stat, :account)
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calculate_scores(statuses, at_time)
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end
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def request_review
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- statuses = Status.where(id: currently_trending_ids(false, -1)).includes(:account)
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+ StatusTrend.pluck('distinct language').flat_map do |language|
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+ score_at_threshold = StatusTrend.where(language: language, allowed: true).order(rank: :desc).where('rank <= ?', options[:review_threshold]).first&.score || 0
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+ status_trends = StatusTrend.where(language: language, allowed: false).joins(:status).includes(status: :account)
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- statuses.filter_map do |status|
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- next unless would_be_trending?(status.id) && !status.trendable? && status.requires_review_notification?
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+ status_trends.filter_map do |trend|
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+ status = trend.status
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- status.account.touch(:requested_review_at)
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- status
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+ if trend.score > score_at_threshold && !status.trendable? && status.requires_review_notification?
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+ status.account.touch(:requested_review_at)
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+ status
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+ end
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+ end
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end
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end
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@@ -75,14 +91,11 @@ class Trends::Statuses < Trends::Base
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private
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def eligible?(status)
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- status.public_visibility? && status.account.discoverable? && !status.account.silenced? && status.spoiler_text.blank? && !status.sensitive? && !status.reply?
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+ status.public_visibility? && status.account.discoverable? && !status.account.silenced? && status.spoiler_text.blank? && !status.sensitive? && !status.reply? && valid_locale?(status.language)
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end
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def calculate_scores(statuses, at_time)
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- global_items = []
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- locale_items = Hash.new { |h, key| h[key] = [] }
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-
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- statuses.each do |status|
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+ items = statuses.map do |status|
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expected = 1.0
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observed = (status.reblogs_count + status.favourites_count).to_f
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@@ -94,29 +107,24 @@ class Trends::Statuses < Trends::Base
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end
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end
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- decaying_score = score * (0.5**((at_time.to_f - status.created_at.to_f) / options[:score_halflife].to_f))
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-
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- next unless decaying_score >= options[:decay_threshold]
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+ decaying_score = begin
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+ if score.zero? || !eligible?(status)
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+ 0
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+ else
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+ score * (0.5**((at_time.to_f - status.created_at.to_f) / options[:score_halflife].to_f))
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+ end
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+ end
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- global_items << { score: decaying_score, item: status }
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- locale_items[status.language] << { account_id: status.account_id, score: decaying_score, item: status } if valid_locale?(status.language)
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+ [decaying_score, status]
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end
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- replace_items('', global_items)
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+ to_insert = items.filter { |(score, _)| score >= options[:decay_threshold] }
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+ to_delete = items.filter { |(score, _)| score < options[:decay_threshold] }
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- Trends.available_locales.each do |locale|
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- replace_items(":#{locale}", locale_items[locale])
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+ StatusTrend.transaction do
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+ StatusTrend.upsert_all(to_insert.map { |(score, status)| { status_id: status.id, account_id: status.account_id, score: score, language: status.language, allowed: status.trendable? || false } }, unique_by: :status_id) if to_insert.any?
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+ StatusTrend.where(status_id: to_delete.map { |(_, status)| status.id }).delete_all if to_delete.any?
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+ StatusTrend.connection.exec_update('UPDATE status_trends SET rank = t0.calculated_rank FROM (SELECT id, row_number() OVER w AS calculated_rank FROM status_trends WINDOW w AS (PARTITION BY language ORDER BY score DESC)) t0 WHERE status_trends.id = t0.id')
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end
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end
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-
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- def filter_for_allowed_items(items)
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- # Show only one status per account, pick the one with the highest score
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- # that's also eligible to trend
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-
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- items.group_by { |item| item[:account_id] }.values.filter_map { |account_items| account_items.select { |item| item[:item].trendable? && item[:item].account.discoverable? }.max_by { |item| item[:score] } }
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- end
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-
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- def would_be_trending?(id)
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- score(id) > score_at_rank(options[:review_threshold] - 1)
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- end
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end
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