module FireAndForget
  class Server
    def self.parse(command_string)
      command = Command.load(command_string)
      [command, run(command)]
    end

    def self.run(cmd)
      if Command.allowed?(cmd)
        cmd.run
      else
        raise PermissionsError, "'#{cmd.class}' is not an approved command"
      end
    end

    def self.kill(task_name, signal="TERM")
      pid = pids[task_name]
      Process.kill(signal, pid) unless pid == 0
    end

    def self.status
      @status ||= {}
    end

    def self.set_pid(task_name, pid)
      pids[task_name] = pid.to_i
    end

    def self.get_pid(task)
      pids[task.name]
    end

    def self.pids
      @pids ||= {}
    end
  end
end