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# frozen_string_literal: true
module Terraform
class RemoteStateHandler < BaseService
include Gitlab::OptimisticLocking
StateLockedError = Class.new(StandardError)
# rubocop: disable CodeReuse/ActiveRecord
def find_with_lock
raise ArgumentError unless params[:name].present?
state = Terraform::State.find_by(project: project, name: params[:name])
raise ActiveRecord::RecordNotFound.new("Couldn't find state") unless state
retry_optimistic_lock(state) { |state| yield state } if state && block_given?
state
end
# rubocop: enable CodeReuse/ActiveRecord
def create_or_find!
raise ArgumentError unless params[:name].present?
Terraform::State.create_or_find_by(project: project, name: params[:name])
end
def handle_with_lock
retrieve_with_lock do |state|
raise StateLockedError unless lock_matches?(state)
yield state if block_given?
state.save! unless state.destroyed?
end
end
def lock!
raise ArgumentError if params[:lock_id].blank?
retrieve_with_lock do |state|
raise StateLockedError if state.locked?
state.lock_xid = params[:lock_id]
state.locked_by_user = current_user
state.locked_at = Time.current
state.save!
end
end
def unlock!
retrieve_with_lock do |state|
# force-unlock does not pass ID, so we ignore it if it is missing
raise StateLockedError unless params[:lock_id].nil? || lock_matches?(state)
state.lock_xid = nil
state.locked_by_user = nil
state.locked_at = nil
state.save!
end
end
private
def retrieve_with_lock
create_or_find!.tap { |state| retry_optimistic_lock(state) { |state| yield state } }
end
def lock_matches?(state)
return true if state.lock_xid.nil? && params[:lock_id].nil?
ActiveSupport::SecurityUtils
.secure_compare(state.lock_xid.to_s, params[:lock_id].to_s)
end
end
end
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