ADD console-based example

florianheinemann · Jul 14, 2018 · 3674146 · 3674146
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diff --git a/examples/console-token/app.js b/examples/console-token/app.js
@@ -0,0 +1,101 @@
+/*
+A simple example of Passwordless that requires no configuration and no database.
+Hence, this is perfect to give Passwordless a quick spin.
+Just run 'npm install' and then 'npm start' within this directory
+*/
+
+// Imports relevant packages
+const express = require('express');
+const app = express();
+const session = require('express-session')
+const passwordless = require('passwordless');
+const MemoryStore = require('passwordless-memorystore');
+const bodyParser = require('body-parser');
+
+// Our user database. Typically, you'd store those in a database 
+const users = [
+    { id: 1, email: 'marc@example.com' },
+    { id: 2, email: 'alice@example.com' }
+];
+
+// Prepare express (add support for sessions and for receiving POST requests)
+app.use(session({secret: 'foo', resave: false, saveUninitialized: true }))
+app.use(bodyParser.urlencoded({ extended: false }));
+
+// Prepare Passwordless and tell it that we want to store the temporary tokens in memory
+passwordless.init(new MemoryStore());
+
+// Tell Passwordless what to do when a user requests a token
+// Here, we simply show a link with the token in the sever console
+// In practice, we'd send an email or text message to the user
+passwordless.addDelivery(
+    function(tokenToSend, uidToSend, recipient, callback) {
+        console.log('Access the account here:\n'
+            + 'http://localhost:3000/' 
+            + '?token=' + tokenToSend + '&uid=' 
+            + encodeURIComponent(uidToSend));
+        callback();
+});
+
+// Prepare Passwordless' session support and tell it
+// to accept tokens on any URL
+app.use(passwordless.sessionSupport());
+app.use(passwordless.acceptToken({ successRedirect: '/'}));
+
+// Display a login form
+app.get('/', function(req, res) {
+    var userString = '';
+    if(req.user) {
+        userString = '<p>Hi, ' + findUserById(req.user).email + '</p>';
+    }
+
+    res.send('<html>                                            \
+                <body>                                          \
+                    <h1>Passwordless Demo</h1>' 
+                +   userString
+                +   '<h2>Login</h2>                             \
+                    <form action="/sendtoken" method="POST">    \
+                        Email:                                  \
+                        <br><input name="user" type="text">     \
+                        <br><input type="submit" value="Login"> \
+                    </form>                                     \
+                </body>                                         \
+            </html>');
+});
+
+// Accept the login form via POST
+app.post('/sendtoken', 
+    passwordless.requestToken(
+        function(user, delivery, callback) {
+            var currentUser = findUserByEmail(user);
+            callback(null, (currentUser) ? currentUser.id : null);
+        }
+    ),
+    function(req, res) {
+        res.send('Sent - The token link has been sent to your server \
+                    console. In practice, you would send it via email or text message!');
+    }
+);
+
+// Launch express
+app.listen(3000, () => console.log('Example app listening on port 3000!'));
+
+// Find a user via its email address 
+function findUserByEmail(email) {
+    for (var i = users.length - 1; i >= 0; i--) {
+        if(users[i].email === email.toLowerCase()) {
+            return users[i];
+        }
+    }
+    return null;
+}
+
+// Find a user by its ID
+function findUserById(id) {
+    for (var i = users.length - 1; i >= 0; i--) {
+        if(users[i].id === parseInt(id, 10)) {
+            return users[i];
+        }
+    }
+    return null;
+}