Introduction to discord-logger

discord-logger is a powerful logging tool designed specifically for use with Discord bots. It allows developers to easily log information, errors, and other events to aid in debugging and monitoring their bots. This guide will cover dozens of useful API functions provided by discord-logger, complete with code snippets, to help you make the most of this tool.

API Functions and Examples

Basic Logging Functions

Here are some fundamental logging functions:

  
    const logger = require('discord-logger');

    // Logging an info message
    logger.info('This is an info message.');

    // Logging a warning message
    logger.warn('This is a warning message.');

    // Logging an error message
    logger.error('This is an error message.');

    // Custom log level
    logger.log('custom', 'This is a custom level log message.');
  

Setting Log Levels

Configure log levels to control what gets logged:

  
    logger.setLevel('info'); // Only log messages at or above the 'info' level

    // This will be logged
    logger.info('Info message after setting level.');

    // This will NOT be logged
    logger.debug('Debug message after setting level.');
  

Formatting Log Messages

Customize the format of log messages:

  
    logger.format = (level, message) => {
      return `[${new Date().toISOString()}] [${level.toUpperCase()}]: ${message}`;
    };

    // Test the custom format
    logger.info('This message should be formatted.');
  

Transports

Log to multiple destinations with transports:

  
    const ConsoleTransport = require('discord-logger/transports/console');
    const FileTransport = require('discord-logger/transports/file');

    // Add console transport
    logger.addTransport(new ConsoleTransport());

    // Add file transport
    logger.addTransport(new FileTransport({ filename: 'bot.log' }));

    // Test logging with multiple transports
    logger.info('This should log to both console and file.');
  

Building an Application with discord-logger

Let’s create a simple Discord bot that uses discord-logger to log various events:

  
    const { Client, Intents } = require('discord.js');
    const logger = require('discord-logger');
    const client = new Client({ intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES] });

    // Setting up the logger
    logger.setLevel('info');
    logger.addTransport(new ConsoleTransport());

    client.once('ready', () => {
      logger.info(`Logged in as ${client.user.tag}!`);
    });

    client.on('messageCreate', message => {
      if (message.content === '!ping') {
        logger.info('Ping command received.');
        message.channel.send('Pong!');
      }
    });

    client.on('error', error => {
      logger.error(`Client error: ${error.message}`);
    });

    client.login('YOUR_BOT_TOKEN');
  

Conclusion

Using discord-logger in your Discord bot projects can significantly improve your debugging and monitoring capabilities. With its flexible API, configurable log levels, and support for multiple transports, discord-logger is an invaluable tool for any Discord bot developer.

Happy logging!

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