Add permission checks

src/commands/about.js

@@ -3,7 +3,8 @@ const { Command } = require('discord-akairo');
 class AboutCommand extends Command {
     constructor() {
         super('about', {
-            aliases: ['about']
+            aliases: ['about'],
+            clientPermissions: ['SEND_MESSAGES']
         });
     }
 

src/commands/eval.js

@@ -7,6 +7,7 @@ class EvalCommand extends Command {
             aliases: ['eval', 'e'],
             ownerOnly: true,
             quoted: false,
+            clientPermissions: ['SEND_MESSAGES'],
             args: [
                 {
                     id: 'code',

src/commands/help.js

@@ -3,7 +3,8 @@ const { Command } = require('discord-akairo');
 class HelpCommand extends Command {
     constructor() {
         super('help', {
-            aliases: ['help']
+            aliases: ['help'],
+            clientPermissions: ['SEND_MESSAGES']
         });
     }
 

src/commands/ping.js

@@ -3,7 +3,8 @@ const { Command } = require('discord-akairo');
 class PingCommand extends Command {
     constructor() {
         super('ping', {
-            aliases: ['ping']
+            aliases: ['ping'],
+            clientPermissions: ['SEND_MESSAGES']
         });
     }
 

src/commands/reload.js

@@ -6,6 +6,7 @@ class ReloadCommand extends Command {
             aliases: ['reload', 'r'],
             ownerOnly: true,
             quoted: false,
+            clientPermissions: ['SEND_MESSAGES'],
             args: [
                 {
                     id: 'type',

src/listeners/error.js

@@ -10,7 +10,11 @@ class ErrorListener extends Listener {
     }
 
     exec(err, message) {
-        message.util.send([
+        if (message.guild && !message.channel.permissionsFor(this.client.user).has('SEND_MESSAGES')) {
+            return null;
+        }
+
+        return message.util.send([
             'An error occured:',
             '```',
             err.toString(),

src/listeners/messageInvalid.js

@@ -11,6 +11,10 @@ class MessageInvalidListener extends Listener {
     }
 
     async exec(message) {
+        if (message.guild && !message.channel.permissionsFor(this.client.user).has('SEND_MESSAGES')) {
+            return null;
+        }
+
         const parse = this.parseMessage(message);
         if (!parse) {
             return null;