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require 'yaml/store'
require 'googleauth/token_store'

module Google
  module Auth
    module Stores
      # Implementation of user token storage backed by a local YAML file
      class FileTokenStore < Google::Auth::TokenStore
        # Create a new store with the supplied file.
        #
        # @param [String, File] file
        #  Path to storage file
        def initialize(options = {})
          path = options[:file]
          @store = YAML::Store.new(path)
        end

        # (see Google::Auth::Stores::TokenStore#load)
        def load(id)
          @store.transaction { @store[id] }
        end

        # (see Google::Auth::Stores::TokenStore#store)
        def store(id, token)
          @store.transaction { @store[id] = token }
        end

        # (see Google::Auth::Stores::TokenStore#delete)
        def delete(id)
          @store.transaction { @store.delete(id) }
        end
      end
    end
  end
end