whaticket-community/backend/src/controllers/contact.js

const Contact = require("../models/Contact");
const Message = require("../models/Message");
const Sequelize = require("sequelize");
const { getIO } = require("../libs/socket");
const { getWbot } = require("./wbot");

exports.getContacts = async (req, res) => {
	const { searchParam = "" } = req.query;

	const lowerSerachParam = searchParam.toLowerCase();

	const whereCondition = {
		name: Sequelize.where(
			Sequelize.fn("LOWER", Sequelize.col("name")),
			"LIKE",
			"%" + lowerSerachParam + "%"
		),
	};

	//todo >> add contact number to search where condition

	const contacts = await Contact.findAll({
		where: whereCondition,
		attributes: {
			include: [
				[
					Sequelize.literal(`(
			        SELECT COUNT(*)
			        FROM messages AS message
			        WHERE
			            message.contactId = contact.id
			            AND
			            message.read = 0

			    )`),
					"unreadMessages",
				],
			],
		},
		order: [["updatedAt", "DESC"]],
	});

	return res.json(contacts);
};

exports.createContact = async (req, res) => {
	const wbot = getWbot();
	const io = getIO();
	const { number, name } = req.body;

	const result = await wbot.isRegisteredUser(`55${number}@c.us`);

	if (!result) {
		return res
			.status(400)
			.json({ error: "The suplied number is not a valid Whatsapp number" });
	}
	const profilePicUrl = await wbot.getProfilePicUrl(`55${number}@c.us`);

	const contact = await Contact.create({
		name,
		number: `55${number}`,
		profilePicUrl,
	});

	res.status(200).json(contact);
};