new model model

nodejs/models/auth.js

@@ -0,0 +1,55 @@
+const {promisify} = require('util');
+const pam = require('authenticate-pam');
+const authenticate = promisify(pam.authenticate);
+
+const {User} = require('./user');
+const {Token, AuthToken} = require('./token');
+
+Auth = {}
+Auth.errors = {}
+
+Auth.errors.login = function(){
+	let error = new Error('PamLoginFailed');
+	error.name = 'PamLoginFailed';
+	error.message = `Invalid Credentials, login failed.`;
+	error.status = 401;
+
+	return error;
+}
+
+Auth.login = async function(data){
+	try{
+		let auth = await authenticate(data.username, data.password);
+		let user = await User.get(data);
+		let token = await AuthToken.add(user);
+
+		return {user, token}
+	}catch(error){
+		if (error == 'Authentication failure'){
+			throw this.errors.login()
+		}
+		throw error;
+	}
+};
+
+Auth.checkToken = async function(data){
+	try{
+		let token = await AuthToken.get(data);
+		if(token.is_valid){
+			return await User.get(token.created_by);
+		}
+	}catch(error){
+		throw this.errors.login();
+	}
+};
+
+Auth.logOut = async function(data){
+	try{
+		let token = await AuthToken.get(data);
+		await token.remove();
+	}catch(error){
+		throw error;
+	}
+}
+
+module.exports = {Auth, AuthToken};