module Flydata

module PluginSupport
  class SourcePositionFile
    attr_accessor :path

    def initialize(path)
      @path = path
    end

    def exists?
      File.exists?(@path)
    end

    def read
      File.open(@path) {|f| f.read }
    end

    def pos
      if exists?
        self.class::SOURCE_POS_CLASS.load(read)
      else
        nil
      end
    end

    def save(*args)
      c = self.class::SOURCE_POS_CLASS.new(*args)
      File.open(@path, 'w') {|f| f.write(c.to_s) }
      c
    end
  end
end

end