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# frozen_string_literal: true
module API
class Unleash < ::API::Base
include PaginationParams
feature_category :feature_flags
namespace :feature_flags do
resource :unleash, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
params do
requires :project_id, type: String, desc: 'The ID of a project'
optional :instance_id, type: String, desc: 'The Instance ID of Unleash Client'
optional :app_name, type: String, desc: 'The Application Name of Unleash Client'
end
route_param :project_id do
before do
authorize_by_unleash_instance_id!
end
get do
# not supported yet
status :ok
end
desc 'Get a list of features (deprecated, v2 client support)'
get 'features' do
if ::Feature.enabled?(:cache_unleash_client_api, project)
present_feature_flags
else
present :version, 1
present :features, feature_flags, with: ::API::Entities::UnleashFeature
end
end
# We decrease the urgency of this endpoint until the maxmemory issue of redis-cache has been resolved.
# See https://gitlab.com/gitlab-org/gitlab/-/issues/365575#note_1033611872 for more information.
desc 'Get a list of features'
get 'client/features', urgency: :low do
if ::Feature.enabled?(:cache_unleash_client_api, project)
present_feature_flags
else
present :version, 1
present :features, feature_flags, with: ::API::Entities::UnleashFeature
end
end
post 'client/register' do
# not supported yet
status :ok
end
post 'client/metrics' do
# not supported yet
status :ok
end
end
end
end
helpers do
def present_feature_flags
present_cached feature_flags_client,
with: ::API::Entities::Unleash::ClientFeatureFlags,
cache_context: -> (client) { client.unleash_api_cache_key }
end
def project
@project ||= find_project(params[:project_id])
end
def feature_flags_client
strong_memoize(:feature_flags_client) do
client = Operations::FeatureFlagsClient.find_for_project_and_token(project, unleash_instance_id)
client.unleash_app_name = unleash_app_name if client
client
end
end
def unleash_instance_id
env['HTTP_UNLEASH_INSTANCEID'] || params[:instance_id]
end
def unleash_app_name
env['HTTP_UNLEASH_APPNAME'] || params[:app_name]
end
def authorize_by_unleash_instance_id!
unauthorized! unless feature_flags_client
end
def feature_flags
return [] unless unleash_app_name.present?
Operations::FeatureFlag.for_unleash_client(project, unleash_app_name)
end
end
end
end
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