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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 = {}
          super()
          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