Federated social network node, running on kosmos.social https://kosmos.social
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# frozen_string_literal: true
require 'singleton'
class EntityCache
include Singleton
MAX_EXPIRATION = 7.days.freeze
def status(url)
Rails.cache.fetch(to_key(:status, url), expires_in: MAX_EXPIRATION) { FetchRemoteStatusService.new.call(url) }
end
def mention(username, domain)
Rails.cache.fetch(to_key(:mention, username, domain), expires_in: MAX_EXPIRATION) { Account.select(:id, :username, :domain, :url).find_remote(username, domain) }
end
def emoji(shortcodes, domain)
shortcodes = Array(shortcodes)
cached = Rails.cache.read_multi(*shortcodes.map { |shortcode| to_key(:emoji, shortcode, domain) })
uncached_ids = []
shortcodes.each do |shortcode|
uncached_ids << shortcode unless cached.key?(to_key(:emoji, shortcode, domain))
end
unless uncached_ids.empty?
uncached = CustomEmoji.where(shortcode: shortcodes, domain: domain, disabled: false).each_with_object({}) { |item, h| h[item.shortcode] = item }
uncached.each_value { |item| Rails.cache.write(to_key(:emoji, item.shortcode, domain), item, expires_in: MAX_EXPIRATION) }
end
shortcodes.filter_map { |shortcode| cached[to_key(:emoji, shortcode, domain)] || uncached[shortcode] }
end
def to_key(type, *ids)
"#{type}:#{ids.compact.map(&:downcase).join(':')}"
end
end