How to add aliases to a command handler in discord.js?

@mallory_cormier 

To add aliases to a command handler in discord.js, you can follow these steps:

1. Define your command handler function that takes in a message object as a parameter. Inside this function, check the message content to determine which command is being used.
2. Create an object or map to store your command names and their corresponding aliases. For example:

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const commands = {
  'ping': ['ping', 'p'],
  'hello': ['hello', 'hi'],
  // Add more commands and their aliases as needed
};

1. Modify your command handling logic to check both the command name and its aliases. You can use the Object.entries method to loop through the commands object and check for matches. For example:

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const command = Object.entries(commands).find(([cmd, aliases]) => {
  return cmd === message.content.toLowerCase().substring(1) || aliases.includes(message.content.toLowerCase().substring(1));
});

if (!command) return;

// Handle the command using the command name (command[0]) or its alias
switch (command[0]) {
  case 'ping':
    // Handle ping command
    break;
  case 'hello':
    // Handle hello command
    break;
  // Add more cases for other commands
}

1. With this setup in place, your command handler will be able to handle commands using their aliases as well as their original names. Just make sure to update the commands object whenever you add new commands or aliases.

By following these steps, you can easily add aliases to a command handler in discord.js.