xiao/commands/random/remind.js

const commando = require('discord.js-commando');
const moment = require('moment');
const sherlock = require('sherlockjs');

module.exports = class RemindCommand extends commando.Command {
    constructor(Client) {
        super(Client, {
            name: 'remind',
            aliases: [
                'remindme'
            ],
            group: 'random',
            memberName: 'remind',
            description: 'Reminds you of something at a certain time. (;remind Eat Food tomorrow)',
            examples: [';remind Eat Food tomorrow']
        });
    }

    async run(message) {
        if (message.channel.type !== 'dm') {
            if (!message.channel.permissionsFor(this.client.user).hasPermission(['SEND_MESSAGES', 'READ_MESSAGES'])) return;
        }
        console.log(`[Command] ${message.content}`);
        let remindMe = message.content.split(" ").slice(1).join(" ");
        let remindTime = sherlock.parse(remindMe);
        let time = remindTime.startDate.getTime() - Date.now();
        let preRemind = await message.channel.send(`I will remind you '${remindTime.eventTitle}' ${moment().add(time, 'ms').fromNow()}.`);
        const remindMessage = await new Promise(resolve => {
            setTimeout(() => resolve(message.channel.send(`${message.author} you wanted me to remind you of: '${remindTime.eventTitle}'`)), time);
        });
        return [preRemind, remindMessage];
    }
};