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# frozen_string_literal: true
module Resolvers
class UserResolver < BaseResolver
include Gitlab::Graphql::Authorize::AuthorizeResource
description 'Retrieve a single user'
type Types::UserType, null: true
argument :id, Types::GlobalIDType[User],
required: false,
description: 'ID of the User.'
argument :username, GraphQL::Types::String,
required: false,
description: 'Username of the User.'
validates exactly_one_of: [:id, :username]
def resolve(id: nil, username: nil)
authorize!
if id
GitlabSchema.object_from_id(id, expected_type: User)
else
batch_load(username)
end
end
private
def batch_load(username)
BatchLoader::GraphQL.for(username).batch do |usernames, loader|
User.by_username(usernames).each do |user|
loader.call(username, user)
end
end
end
def authorize!
raise_resource_not_available_error! unless context[:current_user].present?
end
end
end
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