bot.js

const Discord = require("discord.js");
const client = new Discord.Client();
const config = require("./config.json");


client.on("ready", () => {
  console.log(`Bot has started, with ${client.users.size} users, in ${client.channels.size} channels of ${client.guilds.size} guilds.`); 
  client.user.setActivity(`Owning ${client.guilds.size} noobs`);
 
});

client.on("guildCreate", guild => {
  console.log(`New guild joined: ${guild.name} (id: ${guild.id}). This guild has ${guild.memberCount} members!`);
  client.user.setActivity(`Serving ${client.guilds.size} servers`);
});


client.on("message", async message => {

  if(message.author.bot) return;
  
  if(message.content.indexOf(config.prefix) !== 0) return;
  
  // Here we separate our "command" name, and our "arguments" for the command. 
  // e.g. if we have the message "+say Is this the real life?" , we'll get the following:
  // command = say
  // args = ["Is", "this", "the", "real", "life?"]
  const args = message.content.slice(config.prefix.length).trim().split(/ +/g);
  const command = args.shift().toLowerCase();
  
  if(command === "ping") {
    const m = await message.channel.send("Ping ping?");
    m.edit(`Pong! Latency is ${m.createdTimestamp - message.createdTimestamp}ms. API Latency is ${Math.round(client.ping)}ms`);
  }

  if(command == "info") {
    var kk = "Warhunter is a simple discord bot. i can do what you programme me to do.\n\n";
    message.channel.send(kk + "made with love by\n Chinmay Sharma \na.k.a Hell_Breaker/DrOnZZeR");
  }
  
  if(command === "say") {
    // To get the "message" itself we join the `args` back into a string with spaces: 
    const sayMessage = args.join(" ");
    // Then we delete the command message (sneaky, right?). The catch just ignores the error with a cute smiley thing.
    message.delete().catch(O_o=>{}); 
    // And we get the bot to say the thing: 
    message.channel.send(sayMessage);
  }
  if(command === "time") {
    var date1 = new Date(Date.now());
    message.channel.send("current date and time: "+ date1);
  }
  
  if(command === "kick") {
    // This command must be limited to mods and admins. In this example we just hardcode the role names.
    // Please read on Array.some() to understand this bit: 
    // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/some?
    if(!message.member.roles.some(r=>["Administrator", "Moderator"].includes(r.name)) )
      return message.reply("Sorry, you don't have permissions to use this!");
    
    // Let's first check if we have a member and if we can kick them!
    // message.mentions.members is a collection of people that have been mentioned, as GuildMembers.
    // We can also support getting the member by ID, which would be args[0]
    let member = message.mentions.members.first() || message.guild.members.get(args[0]);
    if(!member)
      return message.reply("Please mention a valid member of this server");
    if(!member.kickable) 
      return message.reply("I cannot kick this user! Do they have a higher role? Do I have kick permissions?");
    
    // slice(1) removes the first part, which here should be the user mention or ID
    // join(' ') takes all the various parts to make it a single string.
    let reason = args.slice(1).join(' ');
    if(!reason) reason = "No reason provided";
    
    await member.kick(reason)
      .catch(error => message.reply(`Sorry ${message.author} I couldn't kick because of : ${error}`));
    message.reply(`${member.user.tag} has been kicked by ${message.author.tag} because: ${reason}`);

  }
  
  
});

client.login(config.token);