flying-squid/src/lib/plugins/daycycle.js

module.exports.server=function(serv) {
  serv.setTime = (time) => {
    serv.time = time;
    serv._writeAll('update_time', {
      age: [0, 0], // TODO
      time: [0, serv.time]
    });
  };

  serv.doDaylightCycle = true;

  serv.time = 0;

  serv.on('tick', (delta,count) => {
    if (!serv.doDaylightCycle) return;
    if (count % 20 == 0) {
      serv.behavior('changeTime', {
        old: serv.time,
        newTime: serv.time + 20
      }, ({newTime}) => {
        serv.setTime((serv.time + 20) % 24000); // Vanilla only does it every second  
      });
    }
  })
};

module.exports.player=function(player,serv){
  player.commands.add({
    base: 'night',
    info: 'to change a time to night',
    usage: '/night',
    action(params) {
      player.handleCommand('time set night');
    }
  });

  player.commands.add({
    base: 'time',
    info: 'to change a time',
    usage: '/time <add|query|set> <value>',
    parse(str) {
      var data = str.match(/^(add|query|set)(?: ([0-9]+|day|night))?/);
      if(!data) return false;
      return {
        action: data[1],
        value: data[2] == 'day' ? 1000 : (data[2] == 'night' ? 13000 : parseInt(data[2]))
      };
    },
    action({action,value}) {
      if(action == "query") {
        player.chat("It is "+serv.time);
      } else {
        var newTime;

        if(action == "set") {
          newTime = value;
        } else if(action == "add") {
          newTime = value + serv.time;
        }

        player.chat("Time was changed from " + serv.time + " to " + newTime);
        serv.setTime(newTime);
      }
    }
  });

  player.commands.add({
    base: 'day',
    info: 'to change a time to day',
    usage: '/day',
    action(params) {
      player.handleCommand('time set day');
    }
  });
};