chomens-bot-js/plugins/music.js

/* eslint-disable max-len */
const {Midi} = require('@tonejs/midi');
const {convertMidi} = require('../util/midi_converter');

const soundNames = {
  harp: 'minecraft:block.note_block.harp',
  basedrum: 'minecraft:block.note_block.basedrum',
  snare: 'minecraft:block.note_block.snare',
  hat: 'minecraft:block.note_block.hat',
  bass: 'minecraft:block.note_block.bass',
  flute: 'minecraft:block.note_block.flute',
  bell: 'minecraft:block.note_block.bell',
  guitar: 'minecraft:block.note_block.guitar',
  chime: 'minecraft:block.note_block.chime',
  xylophone: 'minecraft:block.note_block.xylophone',
  iron_xylophone: 'minecraft:block.note_block.iron_xylophone',
  cow_bell: 'minecraft:block.note_block.cow_bell',
  didgeridoo: 'minecraft:block.note_block.didgeridoo',
  bit: 'minecraft:block.note_block.bit',
  banjo: 'minecraft:block.note_block.banjo',
  pling: 'minecraft:block.note_block.pling',
};

function inject(bot) {
  bot.music = function() {};
  bot.music.song = null;
  bot.music.loop = false;
  time = 0;
  startTime = 0;
  noteIndex = 0;
  const interval = setInterval(() => {
    try {
      if (!bot.music.song) return;
      time = Date.now() - startTime;
      while (bot.music.song.notes[noteIndex]?.time <= time) {
        const note = bot.music.song.notes[noteIndex];
        const floatingPitch = 2 ** ((note.pitch - 12) / 12.0);
        bot.core.run(`minecraft:execute as @a[tag=!nomusic] at @s run playsound ${soundNames[note.instrument]} record @s ~ ~ ~ ${note.volume} ${floatingPitch}`);
        noteIndex++;
        bot.core.run('minecraft:title @a[tag=!nomusic] actionbar ' + JSON.stringify(toComponent()));
        if (noteIndex >= bot.music.song.notes.length) {
          if (bot.music.loop) {
            resetTime();
            return;
          }
          bot.core.run('minecraft:tellraw @a ' + JSON.stringify([{text: 'Finished playing '}, {text: bot.music.song.name, color: 'gold'}]));
          bot.music.stop();
        }
      }
    } catch (e) {
      return;
    }
  }, 20);

  bot.on('end', () => {
    clearInterval(interval);
  });

  bot.music.load = function(buffer, fallbackName = '[unknown]') {
    // TODO: NBS Support
    const midi = new Midi(buffer);
    const song = convertMidi(midi);
    if (song.name === '') song.name = fallbackName;
    return song;
  };

  bot.music.play = function(song) {
    bot.music.song = song;
    loop = song.loop;
    resetTime();
  };

  bot.music.stop = function() {
    bot.music.song = null;
    bot.music.loop = false;
    resetTime();
  };

  function resetTime() {
    time = 0;
    startTime = Date.now();
    noteIndex = 0;
  }

  function formatTime(time) {
    const seconds = Math.floor(time / 1000);

    return `${Math.floor(seconds / 60)}:${(seconds % 60).toString().padStart(2, '0')}`;
  }

  function toComponent() {
    const component = [
      '§8[§eChomeNS Bot§8] ',
      {text: 'Now Playing', color: 'gold'},
      ' §8| ',
      {text: bot.music.song.name, color: 'green'},
      ' §8| ',
      {text: formatTime(time), color: 'gray'},
      ' §8/ ',
      {text: formatTime(bot.music.song.length), color: 'gray'},
      ' §8| ',
      {text: noteIndex, color: 'gray'},
      '§8 / ',
      {text: bot.music.song.notes.length, color: 'gray'},
    ];

    if (bot.music.loop) {
      component.push(' §8| ');
      component.push('§aLooping');
    }

    return component;
  }
}

module.exports = {inject};