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# frozen_string_literal: true
module Groups
# Service class for counting and caching the number of open issues of a group.
class OpenIssuesCountService < BaseCountService
include Gitlab::Utils::StrongMemoize
VERSION = 1
PUBLIC_COUNT_KEY = 'group_public_open_issues_count'
TOTAL_COUNT_KEY = 'group_total_open_issues_count'
CACHED_COUNT_THRESHOLD = 1000
EXPIRATION_TIME = 24.hours
attr_reader :group, :user
def initialize(group, user = nil)
@group = group
@user = user
end
# Reads count value from cache and return it if present.
# If empty or expired, #uncached_count will calculate the issues count for the group and
# compare it with the threshold. If it is greater, it will be written to the cache and returned.
# If below, it will be returned without being cached.
# This results in only caching large counts and calculating the rest with every call to maintain
# accuracy.
def count
cached_count = Rails.cache.read(cache_key)
return cached_count unless cached_count.blank?
refreshed_count = uncached_count
update_cache_for_key(cache_key) { refreshed_count } if refreshed_count > CACHED_COUNT_THRESHOLD
refreshed_count
end
def cache_key(key = nil)
['groups', 'open_issues_count_service', VERSION, group.id, cache_key_name]
end
private
def cache_options
super.merge({ expires_in: EXPIRATION_TIME })
end
def cache_key_name
public_only? ? PUBLIC_COUNT_KEY : TOTAL_COUNT_KEY
end
def public_only?
!user_is_at_least_reporter?
end
def user_is_at_least_reporter?
strong_memoize(:user_is_at_least_reporter) do
group.member?(user, Gitlab::Access::REPORTER)
end
end
def relation_for_count
IssuesFinder.new(user, group_id: group.id, state: 'opened', non_archived: true, include_subgroups: true, public_only: public_only?).execute
end
end
end
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