feat: add better checks before joining

src/commands/voice/join.ts

@@ -1,6 +1,7 @@
 import {
 	ChatInputCommandInteraction,
 	GuildMember,
+	PermissionsBitField,
 	SlashCommandBuilder
 } from 'discord.js';
 import { Command } from '../../commands';
@@ -25,7 +26,7 @@ const cmd: Command = {
 			return;
 		}
 
-		if (!member.voice.channelId) {
+		if (!member.voice.channel || !member.voice.channelId) {
 			interaction.reply('You are not currently on a voice channel');
 			return;
 		}
@@ -40,12 +41,35 @@ const cmd: Command = {
 			return;
 		}
 
+		const voiceChannel = member.voice.channel;
+		if (voiceChannel.userLimit != 0 && voiceChannel.members.size >= voiceChannel.userLimit) {
+			interaction.reply('Channel is full');
+			return;
+		}
+
+		const perms = voiceChannel.permissionsFor(me)
+
+		if (!perms.has(PermissionsBitField.Flags.ViewChannel)) {
+			interaction.reply("I don't have permissions to see that channel")
+			return;
+		}
+
+		if (!perms.has(PermissionsBitField.Flags.Connect)) {
+			interaction.reply("I don't have the permissions to join that channel");
+			return;
+		}
+
+		if (!perms.has(PermissionsBitField.Flags.Speak)) {
+			interaction.reply("I don't have permissions to speak on that channel")
+			return;
+		}
+
 		const voiceOptions: JoinVoiceChannelOptions & CreateVoiceConnectionOptions =
-			{
-				channelId: member.voice.channelId,
-				guildId: interaction.guild.id,
-				adapterCreator: interaction.guild.voiceAdapterCreator
-			};
+		{
+			channelId: member.voice.channelId,
+			guildId: interaction.guild.id,
+			adapterCreator: interaction.guild.voiceAdapterCreator
+		};
 
 		const connection = await joinVoiceChannel(voiceOptions);
 		if (!connection) {