simply-xp/src/addLevel.js

A Simple, Easy and Beginner Friendly XP System

const levels = require("../src/models/level.js");
let {roleSetup} = require("../simplyxp");

/**
 * @param {Discord.Message} message
 * @param {string} userID
 * @param {string} guildID
 * @param {number} level
 */
async function addLevel(message, userID, guildID, level) {
	if (!userID) throw new Error("[XP] User ID was not provided.");

	if (!guildID) throw new Error("[XP] Guild ID was not provided.");

	if (!level) throw new Error("[XP] Level amount is not provided.");

	let {client} = message;

	const user = await levels.findOne({user: userID, guild: guildID});

	if (!user) {
		const newUser = new levels({
			user: userID,
			guild: guildID,
			xp: 0,
			level: 0
		});

		await newUser.save().catch(() => console.log("[XP] Failed to save new user to database"));

		let xp = (level * 10) ** 2;

		return {
			level: level,
			exp: xp
		};
	}
	let level1 = user.level;

	user.level += parseFloat(level);
	user.xp = (user.level * 10) ** 2;

	await user.save().catch((e) =>
		console.log(`[XP] Failed to add Level | User: ${userID} | Err: ${e}`)
	);

	if (level1 !== level) {
		let data = {
			xp: user.xp,
			level: user.level,
			userID,
			guildID
		};

		let role = await roleSetup.find(client, guildID, level);

		client.emit("levelUp", message, data, role);
	}

	return {
		level: user.level,
		xp: user.xp
	};
}

module.exports = addLevel;