I've tried to look for typo and other inaccuracies and tried to add permission requirement for the prune command but still, the ping pong and the "not a valid number" replies work but not the prune when I enter the amount.
Details: I'm trying to make a Discord bot that can prune based on input. I use DJS v12 and follow(ed) this guide https://v12.discordjs.guide/creating-your-bot/commands-with-user-input.html#number-ranges
if (!msg.content.startsWith(prefix) || msg.author.bot) return;
if (!msg.member.hasPermission("BAN_MEMBERS")) {
msg.channel.send("You don\'t have permission.");
}
const args = msg.content.slice(prefix.length).trim().split('/ +/');
const cmd = args.shift().toLowerCase();
if (cmd === `ping`) {
msg.reply('pong.');
} else if (cmd === `prune`) {
if (!msg.guild.me.hasPermission("MANAGE_MESSAGES")) return;
const amount = parseInt(args[0]) + 1;
if (isNaN(amount)) {
return msg.reply('Not a valid number.');
} else if (amount <= 1 || amount > 100) {
return msg.reply('Please input a number between 1 and 99.');
}
msg.channel.bulkDelete(amount, true).catch(err => {
console.error(err);
msg.channel.send('Error!');
});
}
});
The reason why your prune command doesn't work, is because of your command parsing. args is always null whereas cmd always contains the whole string.
So if you enter $prune 3, your args will be empty and cmd contains prune 3. That's why your if here:
else if (cmd === `prune`)
doesn't match (if you specified arguments) and your prune command never gets executed.
To fix that, you have change your command parsing:
const cmd = msg.content.split(" ")[0].slice(prefix.length);
const args = msg.content.split(" ").slice(1);
Note: Also you seem to have a typo in your question:
if (!msg.guild.me.hasPermission("MANAGE_MESSAGES") return;
// Missing ")" here ----^
So change that line to
if (!msg.guild.me.hasPermission("MANAGE_MESSAGES")) return;