debian-mirror-gitlab/app/channels/graphql_channel.rb

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2021-06-08 01:23:25 +05:30
# frozen_string_literal: true
# This is based on https://github.com/rmosolgo/graphql-ruby/blob/v1.11.8/lib/graphql/subscriptions/action_cable_subscriptions.rb#L19-L82
# modified to work with our own ActionCableLink client
class GraphqlChannel < ApplicationCable::Channel # rubocop:disable Gitlab/NamespacedClass
def subscribed
@subscription_ids = []
query = params['query']
variables = Gitlab::Graphql::Variables.new(params['variables']).to_h
operation_name = params['operationName']
result = GitlabSchema.execute(
query,
context: context,
variables: variables,
operation_name: operation_name
)
payload = {
result: result.to_h,
more: result.subscription?
}
# Track the subscription here so we can remove it
# on unsubscribe.
if result.context[:subscription_id]
@subscription_ids << result.context[:subscription_id]
end
transmit(payload)
end
def unsubscribed
@subscription_ids.each do |sid|
GitlabSchema.subscriptions.delete_subscription(sid)
end
end
rescue_from Gitlab::Graphql::Variables::Invalid do |exception|
transmit({ errors: [{ message: exception.message }] })
end
private
# When modifying the context, also update GraphqlController#context if needed
# so that we have similar context when executing queries, mutations, and subscriptions
#
# Objects added to the context may also need to be reloaded in
# `Subscriptions::BaseSubscription` so that they are not stale
def context
# is_sessionless_user is always false because we only support cookie auth in ActionCable
{ channel: self, current_user: current_user, is_sessionless_user: false }
end
end