Minecraft-protocol-1.20.4-chat-parser/main/chatparser.js

const lang = require("./en_us.json"); // translate message
const nbt = require('prismarine-nbt');

function uuidFromIntArray (arr) {
  const buf = Buffer.alloc(16)
  arr.forEach((num, index) => { buf.writeInt32BE(num, index * 4) })
  return buf.toString('hex')
}

function processNbtMessage(msg) {
  try { // RangeError: Maximum call stack size exceeded
	  if (!msg || msg.type === 'end' || msg === undefined) return undefined
	  const simplified = nbt.simplify(msg)
	  const json = JSON.stringify(simplified, (key, val) => {
		if (key === 'id' && Array.isArray(val)) return uuidFromIntArray(val)
		return val
	  })
	  return json
  } catch (e) {
    return '{"text":""}';
  }
}

function inject(bot) {

bot.on('system_chat', (packet) => { // system
  if (packet.isActionBar) return;
  let systemchat = {};
  systemchat.jsonMsg = packet.content;
  systemchat.message = parseMinecraftMessage(processNbtMessage(packet.content));
  systemchat.nocolor_message = parseMinecraftMessageNoColor(processNbtMessage(packet.content));
  bot.emit('Custom_SystemChat', systemchat.message, systemchat);
  bot.emit('Custom_AllChat', systemchat.message, systemchat);
});


bot.on('profileless_chat', (packet) => { // sudo and vanish
  let profilelesschat = {};
  
  profilelesschat.type = packet.type
  
  profilelesschat.formattedMessage = parseMinecraftMessage(processNbtMessage(packet.message))
  profilelesschat.senderName = parseMinecraftMessage(processNbtMessage(packet.name))
  profilelesschat.targetName = parseMinecraftMessage(processNbtMessage(packet.target))
  
  profilelesschat.nocolor_formattedMessage = parseMinecraftMessageNoColor(processNbtMessage(packet.message))
  profilelesschat.nocolor_senderName = parseMinecraftMessageNoColor(processNbtMessage(packet.name))
  profilelesschat.nocolor_targetName = parseMinecraftMessageNoColor(processNbtMessage(packet.target))
  
  bot.emit('Custom_ProfilelessChat', profilelesschat.formattedMessage, profilelesschat)
  bot.emit('Custom_AllChat', profilelesschat.formattedMessage, profilelesschat)
})

bot.on('player_chat', (packet) => { // player
  let playerchat = {};
  
  playerchat.plainMessage = packet.plainMessage;
  playerchat.type = packet.type;
  playerchat.sender = packet.senderUuid;
  
  playerchat.unsignedContent = parseMinecraftMessage(processNbtMessage(packet.unsignedChatContent));
  playerchat.formattedMessage = parseMinecraftMessage(processNbtMessage(packet.formattedMessage));
  playerchat.senderName = parseMinecraftMessage(processNbtMessage(packet.networkName));
  playerchat.targetName = parseMinecraftMessage(processNbtMessage(packet.networkTargetName));
  
  playerchat.nocolor_unsignedContent = parseMinecraftMessageNoColor(processNbtMessage(packet.unsignedChatContent));
  playerchat.nocolor_formattedMessage = parseMinecraftMessageNoColor(processNbtMessage(packet.formattedMessage));
  playerchat.nocolor_senderName = parseMinecraftMessageNoColor(processNbtMessage(packet.networkName));
  playerchat.nocolor_targetName = parseMinecraftMessageNoColor(processNbtMessage(packet.networkTargetName));
        
  switch (playerchat.type) {
	case 1: // /me text
	  msg = `* ${playerchat.senderName} ${playerchat.formattedMessage}`;
	  playerchat.nocolor_msg = `* ${playerchat.nocolor_senderName} ${playerchat.nocolor_formattedMessage}`;
	  break;
    case 2: // someone /tell you text
      msg = `${playerchat.senderName} whispers to you: ${playerchat.plainMessage || playerchat.formattedMessage}`;
	  playerchat.nocolor_msg = `${playerchat.nocolor_senderName} whispers to you: ${playerchat.plainMessage || playerchat.nocolor_formattedMessage}`;	
      break;
	case 3: // you /tell someone text
	  msg = `You whisper to ${playerchat.targetName}: ${playerchat.plainMessage || playerchat.formattedMessage}`;
	  playerchat.nocolor_msg = `You whisper to ${NoColorTargetName}: ${playerchat.plainMessage || playerchat.nocolor_formattedMessage}`;
	  break;
    case 4: // player chat
	  msg = playerchat.unsignedContent;
	  playerchat.nocolor_msg = playerchat.nocolor_unsignedContent;
      break;
    case 5: // /say text
      msg = `[${playerchat.senderName}] ${playerchat.plainMessage || playerchat.formattedMessage}`;
	  playerchat.nocolor_msg = `[${playerchat.nocolor_senderName}] ${playerchat.plainMessage || playerchat.nocolor_formattedMessage}`;
      break;
    case 6: // /minecraft:teammsg text
      msg = `${playerchat.targetName} <${playerchat.senderName}> ${playerchat.plainMessage}`;
	  playerchat.nocolor_msg = `${playerchat.nocolor_targetName} <${playerchat.nocolor_senderName}> ${playerchat.plainMessage}`;
      break;
    default:
      console.log(`Unknown player_chat packet. Type: ${playerchat.type}`);
	  console.log(packet);
      break;
  }
  bot.emit('custom_PlayerChat', msg, playerchat);
  bot.emit('Custom_AllChat', msg, playerchat)
});

const ansiColorCodes = {
  '§0': '\x1B[30m', '§1': '\x1B[34m', '§2': '\x1B[32m', '§3': '\x1B[36m', 
  '§4': '\x1B[31m', '§5': '\x1B[35m', '§6': '\x1B[33m', '§7': '\x1B[37m', 
  '§8': '\x1B[90m', '§9': '\x1B[94m', '§a': '\x1B[92m', '§b': '\x1B[96m', 
  '§c': '\x1B[91m', '§d': '\x1B[95m', '§e': '\x1B[93m', '§f': '\x1B[97m', 
  'black': '\x1B[30m', 'dark_blue': '\x1B[34m', 'dark_green': '\x1B[32m', 
  'dark_aqua': '\x1B[36m', 'dark_red': '\x1B[31m', 'dark_purple': '\x1B[35m', 
  'gold': '\x1B[33m', 'gray': '\x1B[37m', 'dark_gray': '\x1B[90m', 'blue': '\x1B[94m', 
  'green': '\x1B[92m', 'aqua': '\x1B[96m', 'red': '\x1B[91m', 'light_purple': '\x1B[95m', 
  'yellow': '\x1B[93m', 'white': '\x1B[97m'
};

const ansiFormatCodes = {
  '§l': '\x1B[1m',  '§o': '\x1B[3m',  '§n': '\x1B[4m',  '§m': '\x1B[9m', '§k': '\x1B[5m',  '§r': '\x1B[0m',
  'bold': '\x1B[1m', 'italic': '\x1B[3m', 'underlined': '\x1B[4m', 'strikethrough': '\x1B[9m', 'obfuscated': '\x1B[5m', 'reset': '\x1B[0m',
};

function parseMinecraftMessage(component) {
  if (component === undefined) return;

  let jsonComponent;
  try {
	jsonComponent = JSON.parse(component);
  } catch (e) {
	console.error("Invalid JSON format:", component);
	return '';
  }
  
  function extractText(comp) {
    let text = '';
	if (comp.text && typeof comp.text === 'string' || typeof comp.text === 'number' && comp.text !== undefined && comp.text !== null) {
      text += comp.text;
    }
    if (comp[""] && typeof comp[""] === 'string' || typeof comp[""] === 'number' && comp[""] !== undefined && comp[""] !== null) {
      text += comp[""];
    }
	if (comp && typeof comp === 'string' || typeof comp === 'number' && comp !== undefined && comp !== null) {
	  return comp;
    }

    if (comp.extra) {
	  if (!Array.isArray(comp.extra)) comp.extra = [comp.extra]
      comp.extra.forEach(subComp => {
        text += formatfunction(comp, extractText(subComp));
	  });
	}
	
	if (comp.translate) {
		let translateString = lang[comp.translate] || comp.translate;
		if (comp.with) {
			const withArgs = comp.with.map(arg => { return parseMinecraftColor(comp.color) + parseMinecraftFormat(comp) + extractText(arg) });

			let usedReplacements = 0;
			translateString = translateString.replace(/%s/g, () => {
				if (usedReplacements < withArgs.length) {
					return formatfunction(comp, withArgs[usedReplacements++]);
				}
				return "%s";
			});

			withArgs.forEach((arg, index) => {
				const regex = new RegExp(`%${index + 1}\\$s`, 'g');
				translateString = translateString.replace(regex, formatfunction(comp, arg));
			});
		}
		text += formatfunction(comp, translateString);
	}
	
	text = parseMinecraftColor(comp.color) + parseMinecraftFormat(comp) + text + ansiFormatCodes['reset'];
    return text;
  }
  return extractText(jsonComponent) + ansiFormatCodes['reset'];
}

function formatfunction(comp, text) {
	if (text === undefined) return '';
	return text = parseMinecraftColor(comp.color) + parseMinecraftFormat(comp) + text + parseMinecraftColor(comp.color) + parseMinecraftFormat(comp);
}

function parseMinecraftColor(color) {
  if (color && ansiColorCodes[color] && !color.startsWith('#')) {
    return ansiColorCodes[color];
  } else if (color && color.startsWith('#')) {
    const hexRegex = /#?([a-fA-F\d]{2})([a-fA-F\d]{2})([a-fA-F\d]{2})/;
    const hexCodes = hexRegex.exec(color);
    if (hexCodes) {
      const red = parseInt(hexCodes[1], 16);
      const green = parseInt(hexCodes[2], 16);
      const blue = parseInt(hexCodes[3], 16);
      const ansiColor = `\u001b[38;2;${red};${green};${blue}m`;
      return ansiColor;
    }
  } else {
    return '';
  }
}

function parseMinecraftFormat(format) {
  let result = '';
  if (format.bold && format.bold === 1) result += ansiFormatCodes['bold'];
  if (format.italic && format.italic === 1) result += ansiFormatCodes['italic'];
  if (format.underlined && format.underlined === 1) result += ansiFormatCodes['underlined'];
  if (format.strikethrough && format.strikethrough === 1) result += ansiFormatCodes['strikethrough'];
  if (format.obfuscated && format.obfuscated === 1) result += ansiFormatCodes['obfuscated'];
  return result;
}


function parseMinecraftMessageNoColor(component) {
  if (component === undefined) return;
  let jsonComponent;
  try {
	jsonComponent = JSON.parse(component);
  } catch (e) {
    console.error("Invalid JSON format:", component);
  }

  function extractText(comp) {
    let text = '';

	if (comp.text && typeof comp.text === 'string' || typeof comp.text === 'number' && comp.text !== undefined && comp.text !== null) {
      text += comp.text;
    }
    if (comp[""] && typeof comp[""] === 'string' || typeof comp[""] === 'number' && comp[""] !== undefined && comp[""] !== null) {
      text += comp[""];
    }
	if (comp && typeof comp === 'string' || typeof comp === 'number' && comp !== undefined && comp !== null) {
	  return comp;
    }
    if (comp.extra) {
	  if (!Array.isArray(comp.extra)) comp.extra = [comp.extra]
      comp.extra.forEach(subComp => {
        text += extractText(subComp);
      });
    }
	
	if (comp.translate) {
		let translateString = lang[comp.translate] || comp.translate;
		if (comp.with) {
			const withArgs = comp.with.map(arg => extractText(arg));

			let usedReplacements = 0;
			translateString = translateString.replace(/%s/g, () => {
				if (usedReplacements < withArgs.length) {
					return formatfunction(comp, withArgs[usedReplacements++]);
				}
				return "%s";
			});

			withArgs.forEach((arg, index) => {
				const regex = new RegExp(`%${index + 1}\\$s`, 'g');
				translateString = translateString.replace(regex, arg);
			});
		}
		text += translateString;
	}


    return text;
  }
  msgText = extractText(jsonComponent)
  // msgText = msgText.replace('§', '&')
  return msgText;
}


}

module.exports = { inject };