feat: add write API route for checking login credentials

src/controllers/write/index.js

@@ -9,3 +9,4 @@ Write.topics = require('./topics');
 Write.posts = require('./posts');
 Write.admin = require('./admin');
 Write.files = require('./files');
+Write.utilities = require('./utilities');

src/controllers/write/utilities.js

@@ -0,0 +1,44 @@
+'use strict';
+
+const user = require('../../user');
+const authenticationController = require('../authentication');
+const slugify = require('../../slugify');
+const helpers = require('../helpers');
+
+const Utilities = module.exports;
+
+Utilities.ping = {};
+Utilities.ping.get = (req, res) => {
+	helpers.formatApiResponse(200, res, {
+		pong: true,
+	});
+};
+
+Utilities.ping.post = (req, res) => {
+	helpers.formatApiResponse(200, res, {
+		uid: req.user.uid,
+		received: req.body,
+	});
+};
+
+Utilities.login = (req, res) => {
+	res.locals.continueLogin = async (req, res) => {
+		const { username, password } = req.body;
+
+		const userslug = slugify(username);
+		const uid = await user.getUidByUserslug(userslug);
+		const ok = await user.isPasswordCorrect(uid, password, req.ip);
+
+		if (ok) {
+			const userData = await user.getUsers([uid], uid);
+			helpers.formatApiResponse(200, res, userData);
+		} else {
+			helpers.formatApiResponse(403, res);
+		}
+	};
+	res.locals.noScriptErrors = (req, res, err, statusCode) => {
+		helpers.formatApiResponse(statusCode, res, new Error(err));
+	};
+
+	authenticationController.login(req, res);
+};