a small update for prefix system and ban command permissions

commands/ban.js

 const Discord = require('discord.js');
 
 exports.run = async(bot, message, args, connection) => {
+  if (!message.author.hasPermission('BAN_MEMBERS')) return [message.channel.send(`You don't have permission`)];
     let user = message.guild.member(message.mentions.users.first() || message.guild.members.get(args[0]));
     let reason = args.slice(1).join(' ');
 
     if(!user) return message.channel.send('Please mention user to ban.');
-    if(!reason) return message.channel.send('Please type a reason and try again');
+    if(!reason){
+      reason = "no reason";
+    }
     if (!message.guild.member(user).bannable) return message.reply(`I don't have permission to ban this user`);
 
-    let userid = user.id;
     await message.guild.ban(user, {days: 7, reason: reason});
     
     const embed = new Discord.RichEmbed()
     .setColor('RANDOM')
     .setTimestamp()
-    .addField('Punishment:', 'Ban For 7 Days :bangbang:')
     .addField('Banned User:', `${user.user.tag} (${user.id})`)
     .addField('Moderator:', `${message.author.tag} (${message.author.id})`)
     .addField('Reason:', reason);

commands/bulkdelete.js

 const Discord = require('discord.js');
 
 exports.run = async(bot, message, args) => {
+    if (!member.hasPermission('MANAGE_MESSAGES')) return [message.channel.send(`You don't have permission`)];
     let number = parseInt(args.join(' '));
     if (!number) return message.channel.send('Please enter number and try again');
     if (number > 99) return message.channel.send(`I can't delete more than 100 message`);

commands/emoji.js

@@ -3,8 +3,10 @@ const Discord = require('discord.js');
 exports.run = async(bot, message, args) => {
 
     if (!message.member.hasPermission("MANAGE_EMOJIS")) return [message.channel.send(`You don't have permission to add emojis`)];
+
     let url = args[0]
     let name = args[1]
+    
     if (!url) return message.channel.send('Please enter emoji url and try again');
     if (!name) return message.channel.send('Please enter emoji name and try again');
     message.guild.createEmoji(url,name)

commands/kick.js

 const Discord = require('discord.js');
 
 exports.run = async(bot, message, args, connection) => {
+    if (!message.author.hasPermission('KICK_MEMBERS')) return [message.channel.send(`You don't have permission`)];
+
     let user = message.guild.member(message.mentions.users.first() || message.guild.members.get(args[0]));
     let reason = args.slice(1).join(' ');
 
@@ -14,7 +16,6 @@ exports.run = async(bot, message, args, connection) => {
     const embed = new Discord.RichEmbed()
     .setColor('RANDOM')
     .setTimestamp()
-    .addField('Punishment:', 'Kick From Server')
     .addField('Kicked User:', `${user.user.tag} (${user.id})`)
     .addField('Moderator:', `${message.author.tag} (${message.author.id})`)
     .addField('Reason:', reason);

commands/prefix.js

@@ -7,8 +7,8 @@ exports.run = async(bot, message, args, connection) => {
     connection.query("UPDATE guilds SET prefix=? WHERE guildid=?", [prefix, guildid], function (err, result) {
       if (err) throw err;
       message.channel.send("prefix changed succesffully to "+ prefix);
-    });
 
+    });  
 };
 
 module.exports.help = {

commands/punishments.js

 const Discord = require('discord.js');
 const {table} = require('table');
 exports.run = async(bot, message, args, connection) => {
+  if (!message.author.hasPermission('VIEW_AUDIT_LOG')) return [message.channel.send(`You don't have permission`)];
   let user;
   if (message.mentions.users.first() === undefined){
     user = args[0];

commands/unmute.js

@@ -4,16 +4,20 @@ const ms = require("ms");
 exports.run = async(bot, message, args, connection) => {
 
     if (message.member.hasPermission("MANAGE_MESSAGES")){
+
     let spammer = message.guild.member(message.mentions.users.first() || message.guild.members.get(args[0]));
     let role = message.guild.roles.find(r => r.name === "Muted");
     if(!role) return;
+
     if (!spammer.roles.has(role.id)) return message.channel.send('User is already unmuted.');
     spammer.removeRole(role.id);
     message.channel.send(`<@${spammer.id}> can speak again.`);
     }
+
     else {
         message.channel.send(`You don't have permission to unmute users.`)
     }
+    
 };
 
 module.exports.help = {

events/message.js

@@ -4,10 +4,12 @@ module.exports = {
         bot.on('message', async message => {
             
             let guildid = message.guild.id;
+
             var sql = `SELECT prefix FROM guilds WHERE guildid='`+ guildid +`'`;
+            var prefix = "";
             connection.query(sql, function (err, result) {
-            if (err) throw err;
-            let prefix = result[0].prefix;
+            if (result.length == 0) prefix = settings.prefix;
+            if (result.length == 1) prefix = result[0].prefix;
             if (message.author.bot) return;
             if (message.channel.type === "dm") return;
             let args = message.content.slice(prefix.length).trim().split(' ');