feat(Command): add user and bot permission checking

src/events/Message.ts

@@ -76,6 +76,14 @@ export default class extends Event {
         if (cmd.nsfw && message.channel.type !== 'dm' && !message.channel.nsfw) return message.channel.send('This command can only be used in NSFW chnanels.');
 
 
+        if (message.guild) {
+            const missingPerms = message.member?.permissionsIn(message.channel).missing(cmd.requiredPermissions);
+            const missingBotPerms = message.guild.me?.permissionsIn(message.channel).missing(cmd.requiredBotPermissions);
+
+            if (missingBotPerms?.length) return message.channel.send(`Insufficient bot permissions, missing: \`${missingBotPerms.map(perm => FriendlyPermission[perm]).join(', ')}\``);
+            if (missingPerms?.length) return message.channel.send(`Insufficient user permissions, missing: \`${missingPerms.map(perm => FriendlyPermission[perm]).join(', ')}\``);
+        }
+
         // We parse the flags
         while (args.some(arg => arg.startsWith('--'))) {
             const find = args.find(arg => arg.startsWith('--'));
@@ -98,4 +106,38 @@ export default class extends Event {
 
         cmd.run(message, parsedArgs);
     }
+}
+
+enum FriendlyPermission {
+    CREATE_INSTANT_INVITE = "Create Invite",
+    KICK_MEMBERS = "Kick Members",
+    BAN_MEMBERS = "Ban Members",
+    ADMINISTRATOR = "Administrator",
+    MANAGE_CHANNELS = "Manage Channels",
+    MANAGE_GUILD = "Manage Server",
+    ADD_REACTIONS = "Add Reactions",
+    VIEW_AUDIT_LOG = "View Audit Log",
+    PRIORITY_SPEAKER = "Priority Speaker",
+    STREAM = "Video",
+    VIEW_CHANNEL = "Read Messages",
+    SEND_MESSAGES = "Send Messages",
+    SEND_TTS_MESSAGES = "Send TTS Messages",
+    MANAGE_MESSAGES = "Manage Messages",
+    EMBED_LINKS = "Embed Links",
+    ATTACH_FILES = "Attach Files",
+    READ_MESSAGE_HISTORY = "Read Message History",
+    MENTION_EVERYONE = "Mention @everyone, @here, and All Roles",
+    USE_EXTERNAL_EMOJIS = "Use External Emojis",
+    VIEW_GUILD_INSIGHTS = "View Guild Insights",
+    CONNECT = "Connect",
+    SPEAK = "Speak",
+    MUTE_MEMBERS = "Mute Members",
+    DEAFEN_MEMBERS = "Deafen Members",
+    MOVE_MEMBERS = "Move Members",
+    USE_VAD = "Use Voice Activity",
+    CHANGE_NICKNAME = "Change Nickname",
+    MANAGE_NICKNAMES = "Manage Nicknames",
+    MANAGE_ROLES = "Manage Roles",
+    MANAGE_WEBHOOKS = "Manage Webhooks",
+    MANAGE_EMOJIS = "Manage Emojis"
 }

src/lib/structures/Command.ts

@@ -1,7 +1,7 @@
 import { MoonlightClient } from "../..";
 import { BasePool } from './Pools/Base/BasePool';
 import { BasePiece, BasePieceOptions } from './BasePiece';
-import { Message } from "discord.js";
+import { Message, PermissionString } from "discord.js";
 
 /**
  * @class
@@ -22,6 +22,10 @@ export class Command extends BasePiece<Command> {
     public readonly usage: string;
     /** The usage delimiter */
     public readonly usageDelim: string | undefined;
+    /** The permissions the user is required to have to run the command */
+    public readonly requiredPermissions: PermissionString[];
+    /** The permissions the bot requires to run the command */
+    public readonly requiredBotPermissions: PermissionString[];
     /** The map containing the customized responses */
     public readonly customizedResponses: Map<string, string> = new Map<string, string>();
     /** The flags provided by the user when running the command */
@@ -45,6 +49,8 @@ export class Command extends BasePiece<Command> {
         this.ownerOnly = options?.ownerOnly ?? false;
         this.usage = options?.usage ?? '';
         this.usageDelim = options?.usageDelim ?? undefined;
+        this.requiredPermissions = options?.requiredPermissions ?? new Array();
+        this.requiredBotPermissions = options?.requiredBotPermissions ?? new Array();
     }
 }
 
@@ -63,4 +69,8 @@ interface CommandOptions extends BasePieceOptions {
     usage?: string;
     /** The usage delimiter */
     usageDelim?: string | undefined;
+    /** The permissions the user is required to have to run the command */
+    requiredPermissions?: PermissionString[];
+    /** The permissions the bot requires to run the command */
+    requiredBotPermissions?: PermissionString[];
 }