feat: add join and leave commands

src/commands/voice/_category.ts

@@ -0,0 +1,8 @@
+import { CommandCategoryInfo } from '../../commands';
+
+const info: CommandCategoryInfo = {
+    name: 'Voice',
+    description: 'Voice chat related commands'
+};
+
+export default info;

src/commands/voice/join.ts

@@ -0,0 +1,47 @@
+import { ChatInputCommandInteraction, GuildMember, SlashCommandBuilder } from "discord.js";
+import { Command } from "../../commands";
+import { CreateVoiceConnectionOptions, getVoiceConnection, joinVoiceChannel, JoinVoiceChannelOptions } from "@discordjs/voice";
+
+const builder = new SlashCommandBuilder()
+    .setName("join")
+    .setDescription("Makes the bot join your current voice channel");
+
+const cmd: Command = {
+    name: builder.name,
+    builder: builder,
+    execute: async (interaction: ChatInputCommandInteraction): Promise<void> => {
+        const member = interaction.member as GuildMember;
+        if (!member || !interaction.guild) {
+            interaction.reply("This command only works on guilds");
+            return;
+        }
+
+        if (!member.voice.channelId) {
+            interaction.reply("You are not currently on a voice channel");
+            return;
+        }
+
+        const me = interaction.guild.members.me as GuildMember;
+
+        if (getVoiceConnection(interaction.guild.id) && me.voice.channelId === member.voice.channelId) {
+            interaction.reply("Already connected");
+            return;
+        }
+
+        const voiceOptions: JoinVoiceChannelOptions & CreateVoiceConnectionOptions = {
+            channelId: member.voice.channelId,
+            guildId: interaction.guild.id,
+            adapterCreator: interaction.guild.voiceAdapterCreator
+        };
+
+        const connection = await joinVoiceChannel(voiceOptions);
+        if (!connection) {
+            interaction.reply("Unable to join");
+            return
+        }
+
+        interaction.reply("Joined");
+    }
+}
+
+export default cmd;

src/commands/voice/leave.ts

@@ -0,0 +1,32 @@
+import { ChatInputCommandInteraction, GuildMember, SlashCommandBuilder } from "discord.js";
+import { Command } from "../../commands";
+import { getVoiceConnection } from "@discordjs/voice";
+
+const builder = new SlashCommandBuilder()
+    .setName("leave")
+    .setDescription("Makes the bot leave its current voice channel");
+
+const cmd: Command = {
+    name: builder.name,
+    builder: builder,
+    execute: async (interaction: ChatInputCommandInteraction): Promise<void> => {
+        const member = interaction.member as GuildMember;
+        if (!member || interaction.guild === null) {
+            interaction.reply("This command only works on guilds");
+            return;
+        }
+
+        const connection = getVoiceConnection(interaction.guildId as string);
+        if (!connection) {
+            interaction.reply('currently not connected to a voice channel')
+            return;
+        }
+
+        connection.disconnect();
+        connection.destroy();
+
+        interaction.reply("Disconnected");
+    }
+}
+
+export default cmd;