This content originally appeared on Level Up Coding - Medium and was authored by Gabriel Ferreira
I created a discord bot a few weeks ago. The idea for it was simple: The user would click on a button, then the bot would create a new channel for them, containing a series of questions which could be urls, select menus, numbers, etc. Once all of the questions had been answered, the bot would send them to another channel as an embed message. Easy, right? However, there was a little issue.
The problem
One of the questions required by the bot was a date and time. I had to get the message content and format it into a Discord timestamp. The code looked like this:
customParseFormat = require('dayjs/plugin/customParseFormat');
const dayjs = require("dayjs");
dayjs.extend(customParseFormat);/*...*/
const filter = m => m.author.id === interaction.user.id && !m.author.bot;
collector = channel.createMessageCollector({ time: 60000, filter });
p = new Promise((resolve, reject) => {
collector.on("collect", m => {
if(!dayjs(m.content, "DD/MM/YYYY HH:mm").isValid()) return m.delete(); answers.push({name: q.name, value: `<t:${dayjs(m.content, "DD/MM/YYYY HH:mm").unix()}>`});
resolve(m);
collector.stop();
m.delete();
});
});await p;
/*...*/
The bot worked just fine to me, but when my client tested it, they got a completely different time!
As it turns out, this is because we were in different timezones. So when my client sent a date, the bot parsed it as-is, without considering time differences. Since my timezone is UTC+3 and theirs is UTC, their time would always be 3 hours different than their original input. This was of course a big problem.
The solution
Sadly, Discord.js currently doesn’t offer any way to get the user’s local time. So the only solution was to get it as an argument, and add or subtract hours depending on the bot’s local time. Fortunately, Day.js lets you parse a date using an input string, and convert the parsed date into a unix timestamp. It also lets you add or subtract from the time. Perfect!
After a little bit of testing, the code ended up like this:
customParseFormat = require('dayjs/plugin/customParseFormat');
const dayjs = require("dayjs");
dayjs.extend(customParseFormat);/*...*/
const filter = m => m.author.id === interaction.user.id && !m.author.bot;
collector = channel.createMessageCollector({ time: 60000, filter });
p = new Promise((resolve, reject) => {
collector.on("collect", m => {
const localOffset = new Date().getTimezoneOffset() / 60;
let date = m.content.split(" ");
if(date.length !== 3) return m.delete();const timezone = parseInt(date[date.length - 1]);
date.pop();
date = date.join(" ")
if(!dayjs(date, "DD/MM/YYYY HH:mm").isValid()) return m.delete();
answers.push({name: q.name, value: `<t:${dayjs(m.content, "DD/MM/YYYY HH:mm").add(timezone + localOffset, "h").unix()}>`});
resolve(m);
collector.stop();
m.delete();
});
});await p;
/*...*/
Note that localOffset will be positive if the bot is on the left of UTC and negative if it is on the right.
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Timezones on discord.js was originally published in Level Up Coding on Medium, where people are continuing the conversation by highlighting and responding to this story.
This content originally appeared on Level Up Coding - Medium and was authored by Gabriel Ferreira
Gabriel Ferreira | Sciencx (2022-06-22T15:16:27+00:00) Timezones on discord.js. Retrieved from https://www.scien.cx/2022/06/22/timezones-on-discord-js/
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