Merge branch 'master' into feature/63-delete-account-frontend

app/package.json

@@ -24,6 +24,7 @@
     "leaflet": "^1.5.1",
     "mapnik": "^4.2.1",
     "node-fs": "^0.1.7",
+    "nodemailer": "^6.3.0",
     "pg-promise": "^8.7.5",
     "prop-types": "^15.7.2",
     "query-string": "^6.8.2",
@@ -39,7 +40,8 @@
     "@types/express": "^4.17.0",
     "@types/express-session": "^1.15.13",
     "@types/jest": "^24.0.17",
-    "@types/node": "^12.7.1",
+    "@types/node": "^8.10.52",
+    "@types/nodemailer": "^6.2.1",
     "@types/prop-types": "^15.7.1",
     "@types/react": "^16.9.1",
     "@types/react-dom": "^16.8.5",

app/src/api/api.ts

@@ -1,49 +1,20 @@
 import express from 'express';
 import bodyParser from 'body-parser';
 
-import { authUser, createUser, getUserById, getNewUserAPIKey, deleteUser } from './services/user';
+import { authUser, createUser, getUserById, getNewUserAPIKey, deleteUser, logout } from './services/user';
 import { queryLocation } from './services/search';
 
 import buildingsRouter from './routes/buildingsRouter';
+import usersRouter from './routes/usersRouter';
 
 
-const server = express();
+const server = express.Router();
 
 // parse POSTed json body
 server.use(bodyParser.json());
 
 server.use('/buildings', buildingsRouter);
-
-// POST new user
-server.post('/users', function (req, res) {
-    const user = req.body;
-    if (req.session.user_id) {
-        res.send({ error: 'Already signed in' });
-        return
-    }
-
-    if (user.email) {
-        if (user.email != user.confirm_email) {
-            res.send({ error: 'Email did not match confirmation.' });
-            return
-        }
-    } else {
-        user.email = null;
-    }
-
-    createUser(user).then(function (result) {
-        if (result.user_id) {
-            req.session.user_id = result.user_id;
-            res.send({ user_id: result.user_id });
-        } else {
-            req.session.user_id = undefined;
-            res.send({ error: result.error });
-        }
-    }).catch(function (err) {
-        console.error(err);
-        res.send(err)
-    });
-});
+server.use('/users', usersRouter);
 
 // GET own user info
 server.route('/users/me')
@@ -98,16 +69,6 @@ server.post('/logout', function (req, res) {
     });
 });
 
-function logout(session) {
-    return new Promise((resolve, reject) => {
-        session.user_id = undefined;
-        session.destroy(err => {
-            if (err) return reject(err);
-            return resolve();
-        });
-    });
-}
-
 // POST generate API key
 server.post('/api/key', function (req, res) {
     if (!req.session.user_id) {
@@ -157,8 +118,20 @@ server.get('/search', function (req, res) {
     });
 })
 
+server.use((err, req, res, next) => {
+    if (res.headersSent) {
+        return next(err);
+    }
+
+    if (err != undefined) {
+        console.log('Global error handler: ', err);
+        res.status(500).send({ error: 'Server error' });
+    }
+});
+
 server.use((req, res) => {
     res.status(404).json({ error: 'Resource not found'});
 })
 
-export default server;
+
+export default server;

app/src/api/controllers/userController.ts

@@ -0,0 +1,104 @@
+import { URL } from 'url';
+
+import express from 'express';
+
+import * as userService from '../services/user';
+import * as passwordResetService from '../services/passwordReset';
+import { TokenVerificationError } from '../services/passwordReset';
+
+function createUser(req, res) {
+    const user = req.body;
+    if (req.session.user_id) {
+        res.send({ error: 'Already signed in' });
+        return;
+    }
+
+    if (user.email) {
+        if (user.email != user.confirm_email) {
+            res.send({ error: 'Email did not match confirmation.' });
+            return;
+        }
+    } else {
+        user.email = null;
+    }
+
+    userService.createUser(user).then(function (result) {
+        if (result.user_id) {
+            req.session.user_id = result.user_id;
+            res.send({ user_id: result.user_id });
+        } else {
+            req.session.user_id = undefined;
+            res.send({ error: result.error });
+        }
+    }).catch(function (err) {
+        console.error(err);
+        res.send(err);
+    });
+}
+
+function getCurrentUser(req, res) {
+    if (!req.session.user_id) {
+        res.send({ error: 'Must be logged in' });
+        return;
+    }
+
+    userService.getUserById(req.session.user_id).then(function (user) {
+        res.send(user);
+    }).catch(function (error) {
+        res.send(error);
+    });
+}
+
+function deleteCurrentUser(req, res) {
+    if (!req.session.user_id) {
+        return res.send({ error: 'Must be logged in' });
+    }
+    console.log(`Deleting user ${req.session.user_id}`);
+
+    userService.deleteUser(req.session.user_id).then(
+        () => userService.logout(req.session)
+    ).then(() => {
+        res.send({ success: true });
+    }).catch(err => {
+        res.send({ error: err });
+    });
+}
+
+async function resetPassword(req: express.Request, res: express.Response) {
+    if(req.body == undefined || (req.body.email == undefined && req.body.token == undefined)) {
+        return res.send({ error: 'Expected an email address or password reset token in the request body' });
+    }
+
+    if(req.body.email != undefined) {
+        // first stage: send reset token to email address
+
+        // this relies on the API being on the same hostname as the frontend
+        const { origin } = new URL(req.protocol + '://' + req.headers.host);
+        await passwordResetService.sendPasswordResetToken(req.body.email, origin);
+
+        return res.status(202).send({ success: true });
+    } else if (req.body.token != undefined) {
+        // second stage: verify token and reset password
+        if (req.body.password == undefined) {
+            return res.send({ error: 'Expected a new password' });
+        }
+        try {
+            await passwordResetService.resetPassword(req.body.token, req.body.password);
+        } catch (err) {
+            if (err instanceof TokenVerificationError) {
+                return res.send({ error: 'Could not verify token' });
+            }
+
+            throw err;
+        }
+
+        return res.send({ success: true });
+    }
+}
+
+export default {
+    createUser,
+    getCurrentUser,
+    deleteCurrentUser,
+    resetPassword
+};

app/src/api/routes/usersRouter.ts

@@ -0,0 +1,21 @@
+import express from 'express';
+
+import userController from '../controllers/userController';
+
+const asyncMiddleware = fn =>
+    (req, res, next) => {
+        Promise.resolve(fn(req, res, next))
+            .catch(next);
+    };
+
+const router = express.Router();
+
+router.post('/', userController.createUser);
+
+router.route('/me')
+    .get(userController.getCurrentUser)
+    .delete(userController.deleteCurrentUser);
+
+router.put('/password', asyncMiddleware(userController.resetPassword));
+
+export default router;

app/src/api/services/email.ts

@@ -0,0 +1,11 @@
+import * as nodemailer from 'nodemailer';
+
+export const transporter = nodemailer.createTransport({
+    host: process.env.MAIL_SERVER_HOST,
+    port: parseInt(process.env.MAIL_SERVER_PORT),
+    secure: false,
+    auth: {
+        user: process.env.MAIL_SERVER_USER,
+        pass: process.env.MAIL_SERVER_PASSWORD
+    }
+});

app/src/api/services/passwordReset.ts

@@ -0,0 +1,121 @@
+import url, { URL } from 'url';
+import { errors } from 'pg-promise';
+import nodemailer from 'nodemailer';
+
+import db from '../../db';
+import * as userService from './user';
+import { transporter } from './email';
+
+
+/**
+ * Generate a password reset token for the specified account and send the password reset link by email
+ * @param email the email address for which to generate a password reset token
+ * @param siteOrigin the origin of the website, without a path element - e.g. https://beta.colouring.london
+ */
+export async function sendPasswordResetToken(email: string, siteOrigin: string): Promise<void> {
+    const user = await userService.getUserByEmail(email);
+
+    // if no user found for email, do nothing
+    if (user == undefined) return;
+
+    const token = await createPasswordResetToken(user.user_id);
+    const message = getPasswordResetEmail(email, token, siteOrigin);
+    await transporter.sendMail(message);
+}
+
+export async function resetPassword(passwordResetToken: string, newPassword: string): Promise<void> {
+    const userId = await verifyPasswordResetToken(passwordResetToken);
+    if (userId != undefined) {
+        await updatePasswordForUser(userId, newPassword);
+        //TODO: expire other tokens of the user?
+    } else {
+        throw new TokenVerificationError('Password reset token could not be verified');
+    }
+}
+
+export class TokenVerificationError extends Error {
+    constructor(message: string) {
+        super(message);
+        this.name = "TokenVerificationError";
+    }
+}
+
+function getPasswordResetEmail(email: string, token: string, siteOrigin: string): nodemailer.SendMailOptions {
+    const linkUrl = new URL(siteOrigin);
+    linkUrl.pathname = '/password-reset.html';
+    linkUrl.search = `?token=${token}`;
+
+    const linkString = url.format(linkUrl);
+
+    const messageBody = `Hi there,
+
+    Someone has requested a password reset for the Colouring London account associated with this email address.
+    Click on the following link within the next 24 hours to reset your password:
+
+    ${linkString}
+    `;
+
+    return {
+        text: messageBody,
+        subject: 'Reset your Colouring London password',
+        to: email,
+        from: 'no-reply@colouring.london'
+    };
+}
+
+async function createPasswordResetToken(userId: string) {
+    const { token } = await db.one(
+        `INSERT INTO
+            user_password_reset_tokens (user_id, expires_on)
+        VALUES
+            ($1::uuid, now() at time zone 'utc' + INTERVAL '$2 day')
+        RETURNING
+            token
+        `, [userId, 1]
+    );
+
+    return token;
+}
+
+/**
+ * Verify that the password reset token is valid and expire the token
+ * @param token password reset token to verify and use
+ * @returns the UUID of the user whose token was used
+ */
+async function verifyPasswordResetToken(token: string): Promise<string> {
+    try {
+        // verify and deactivate the token in one operation
+        const usedToken = await db.one(
+            `UPDATE
+                user_password_reset_tokens
+            SET used = true
+            WHERE
+            token = $1::uuid
+            AND NOT used
+            AND now() at time zone 'utc' < expires_on
+            RETURNING *`, [token]
+            );
+        console.log('verified');
+
+        return usedToken.user_id;
+    } catch (err) {
+        if (err instanceof errors.QueryResultError)  {
+            console.log(err.code);
+            if (err.code === errors.queryResultErrorCode.noData) return undefined;
+        }
+
+        throw err;
+    }
+}
+
+async function updatePasswordForUser(userId: string, newPassword: string): Promise<null> {
+    return db.none(
+        `UPDATE
+            users
+        SET
+            pass = crypt($1, gen_salt('bf'))
+        WHERE
+            user_id = $2::uuid
+        `, [newPassword, userId]);
+}
+

app/src/api/services/user.ts

@@ -86,6 +86,21 @@ function getUserById(id) {
     });
 }
 
+function getUserByEmail(email: string) {
+    return db.one(
+        `SELECT
+            user_id, username, email
+        FROM
+            users
+        WHERE
+            email = $1
+        `, [email]
+    ).catch(function(error) {
+        console.error('Error:', error);
+        return undefined;
+    });
+}
+
 function getNewUserAPIKey(id) {
     return db.one(
         `UPDATE
@@ -140,4 +155,23 @@ function deleteUser(id) {
     });
 }
 
-export { getUserById, createUser, authUser, getNewUserAPIKey, authAPIUser, deleteUser }
+function logout(session: Express.Session) {
+    return new Promise((resolve, reject) => {
+        session.user_id = undefined;
+        session.destroy(err => {
+            if (err) return reject(err);
+            return resolve();
+        });
+    });
+}
+
+export {
+    getUserById,
+    getUserByEmail,
+    createUser,
+    authUser,
+    getNewUserAPIKey,
+    authAPIUser,
+    deleteUser,
+    logout
+};

app/src/frontend/app.tsx

@@ -20,6 +20,8 @@ import Welcome from './welcome';
 import { parseCategoryURL } from '../parse';
 import PrivacyPolicyPage from './privacy-policy';
 import ContributorAgreementPage from './contributor-agreement';
+import ForgottenPassword from './forgotten-password';
+import PasswordReset from './password-reset';
 
 /**
  * App component
@@ -247,6 +249,8 @@ class App extends React.Component<any, any> { // TODO: add proper types
                         <Route exact path="/login.html">
                             <Login user={this.state.user} login={this.login} />
                         </Route>
+                        <Route exact path="/forgotten-password.html" component={ForgottenPassword} />
+                        <Route exact path="/password-reset.html" component={PasswordReset} />
                         <Route exact path="/sign-up.html">
                             <SignUp user={this.state.user} login={this.login} />
                         </Route>

app/src/frontend/forgotten-password.tsx

@@ -0,0 +1,84 @@
+import React, { FormEvent, ChangeEvent } from 'react';
+import InfoBox from './info-box';
+import ErrorBox from './error-box';
+
+interface ForgottenPasswordState {
+    success: boolean;
+    error: string;
+    email: string;
+    emailUsed: string;
+}
+
+export default class ForgottenPassword extends React.Component<{}, ForgottenPasswordState> {
+    constructor(props) {
+        super(props);
+        this.state = {
+            error: undefined,
+            success: undefined,
+            email: undefined,
+            emailUsed: undefined
+        };
+    }
+
+    handleChange(event: ChangeEvent<HTMLInputElement>) {
+        const { name, value } = event.currentTarget;
+        this.setState({ [name]: value } as any);
+    }
+    
+    async handleSubmit(event: FormEvent) {
+        event.preventDefault();
+        this.setState({ error: undefined, success: undefined });
+
+        const emailSent = this.state.email;
+        try {
+            const res = await fetch('/api/users/password', {
+                method: 'PUT',
+                body: JSON.stringify({ email: emailSent }),
+                headers: {
+                    'Content-Type': 'application/json'
+                }
+            });
+            const data = await res.json();
+
+            if (data.error != undefined) {
+                this.setState({ error: data.error });
+            } else if (data.success === true) {
+                this.setState({ success: true, emailUsed: emailSent});
+            } else {
+                this.setState({ error: 'Unexpected result.' });
+            }
+        } catch (err) {
+            this.setState({ error: 'Something went wrong.' });
+        }
+    }
+
+    render() {
+        return (
+            <article>
+                <section className="main-col">
+                    <h1 className="h2">Forgotten password</h1>
+                    <p>Please provide the e-mail address associated with your account. A password reset link will be sent to your mailbox.</p>
+                    <ErrorBox msg={this.state.error} />
+                    <InfoBox msg="">
+                        {this.state.success ?
+                            `A password reset link has been sent to ${this.state.emailUsed}. Please check your inbox.` :
+                            null
+                        }
+                    </InfoBox>
+                    <form onSubmit={e => this.handleSubmit(e)}>
+                        <label htmlFor="email">E-mail</label>
+                        <input name="email" id="email"
+                            className="form-control" type="email"
+                            placeholder="Your e-mail address" required
+                            onChange={e => this.handleChange(e)}
+                        />
+
+                        <div className="buttons-container">
+                            <input type="submit" value="Request password reset" className="btn btn-primary" />
+                        </div>
+                    </form>
+                </section>
+            </article>
+        )
+    }
+}

app/src/frontend/login.tsx

@@ -111,6 +111,8 @@ class Login extends Component<any, any> { // TODO: add proper types
                             <label htmlFor="show_password" className="form-check-label">Show password?</label>
                         </div>
 
+                        <Link to="/forgotten-password.html">Forgotten password?</Link>
+
                         <div className="buttons-container">
                             <input type="submit" value="Log In" className="btn btn-primary" />
                         </div>

app/src/frontend/password-reset.tsx

@@ -0,0 +1,122 @@
+import React, { ChangeEvent, FormEvent } from 'react';
+import { RouteComponentProps, Redirect } from 'react-router';
+
+import ErrorBox from './error-box';
+import { Link } from 'react-router-dom';
+
+interface PasswordResetState {
+    error: string;
+    success: boolean;
+    token: string;
+    password: string;
+    confirmPassword: string;
+}
+
+export default class PasswordReset extends React.Component<RouteComponentProps, PasswordResetState> {
+
+    static tokenMissingMessage = 'Password reset token is missing. Make sure to follow the link from a password reset email!';
+
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            error: undefined,
+            success: undefined,
+            token: undefined,
+            password: undefined,
+            confirmPassword: undefined
+        };
+    }
+
+    componentDidMount() {
+        const queryParams = new URLSearchParams(this.props.location.search);
+        const token = queryParams.get('token');
+        if(token == undefined) {
+            this.setState({ error: PasswordReset.tokenMissingMessage });
+        } else {
+            this.setState({ token: token });
+        }
+    }
+
+    handleChange(event: FormEvent<HTMLInputElement>) {
+        const { name, value } = event.currentTarget;
+        this.setState({
+            [name]: value,
+        } as any);
+    }
+
+    async handleSubmit(event: FormEvent) {
+        event.preventDefault();
+
+        this.setState({ error: undefined });
+
+        if(this.state.token == undefined) {
+            this.setState({ error: PasswordReset.tokenMissingMessage });
+            return;
+        }
+        if(this.state.password !== this.state.confirmPassword) {
+            this.setState({ error: 'Passwords do not match' });
+            return;
+        }
+
+
+        const requestData = {
+            token: this.state.token,
+            password: this.state.password
+        };
+
+        const res = await fetch('/api/users/password', {
+            method: 'PUT',
+            body: JSON.stringify(requestData),
+            headers: {
+                'Content-Type': 'application/json'
+            }
+        });
+        const data = await res.json();
+
+        if (data.error != undefined) {
+            this.setState({ error: data.error });
+        } else if (data.success === true) {
+            this.setState({ success: true });
+        } else {
+            this.setState({ error: 'Unexpected result.' });
+        }
+    }
+
+    render() {
+        if (this.state.success) {
+            return <Redirect to="/my-account.html" />;
+        }
+        return (
+            
+            <article>
+                <section className="main-col">
+                    <h1 className="h2">Forgotten password</h1>
+                    <p>Please input the new password you want to set for your account. If your password reset token does not work, go back to the <Link to="/forgotten-password.html">forgotten password page</Link> to request a new link.</p>
+                    <ErrorBox msg={this.state.error} />
+                    <form onSubmit={e => this.handleSubmit(e)}>
+                        <label htmlFor="email">New password</label>
+                        <input name="password"
+                            className="form-control" type="password"
+                            placeholder="New password" required
+                            onChange={e => this.handleChange(e)}
+                        />
+
+                        <label htmlFor="email">Confirm new password</label>
+                        <input name="confirmPassword"
+                            className="form-control" type="password"
+                            placeholder="Confirm new password" required
+                            onChange={e => this.handleChange(e)}
+                        />
+
+                        <input name="token" id="token" type="hidden" value={this.state.token} />
+
+                        <div className="buttons-container">
+                            <input type="submit" value="Change password" className="btn btn-primary" />
+                        </div>
+                    </form>
+                </section>
+            </article>
+        )
+    }
+}

ecosystem.config.dev-template.js

@@ -21,7 +21,10 @@ module.exports = {
                 PGUSER: "username",
                 PGPASSWORD: "longrandomsecret",
                 APP_COOKIE_SECRET: "longrandomsecret",
-
+                MAIL_SERVER_HOST: "mail_hostname",
+                MAIL_SERVER_PORT: 587,
+                MAIL_SERVER_USER: "mail_username",
+                MAIL_SERVER_PASSWORD: "longrandompassword",
             }
         }
     ]

ecosystem.config.template.js

@@ -17,7 +17,11 @@ module.exports = {
                 PGUSER: "username",
                 PGPASSWORD: "longrandomsecret",
                 APP_COOKIE_SECRET: "longrandomsecret",
-                TILECACHE_PATH: "/path/to/tile/cache"
+                TILECACHE_PATH: "/path/to/tile/cache",
+                MAIL_SERVER_HOST: "mail_hostname",
+                MAIL_SERVER_PORT: 587,
+                MAIL_SERVER_USER: "mail_username",
+                MAIL_SERVER_PASSWORD: "longrandompassword",
             }
         }
     ]

migrations/010.password-reset.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS user_password_reset_tokens;

migrations/010.password-reset.up.sql

@@ -0,0 +1,6 @@
+CREATE TABLE IF NOT EXISTS user_password_reset_tokens (
+    token uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id uuid,
+    expires_on timestamp NOT NULL,
+    used boolean NOT NULL DEFAULT false
+)