Add user signup (has to be enabled via config)

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Matemat Changelog
 
+<!-- BEGIN RELEASE v0.2.11 -->
+## Version 0.2.11
+
+Feature release
+
+### Changes
+
+<!-- BEGIN CHANGES 0.2.11 -->
+- Feature: Permit user signup
+<!-- END CHANGES 0.2.11 -->
+
+<!-- END RELEASE v0.2.11 -->
+
 <!-- BEGIN RELEASE v0.2.10 -->
 ## Version 0.2.10
 

matemat/__init__.py

@@ -1,2 +1,2 @@
 
-__version__ = '0.2.10'
+__version__ = '0.2.11'

matemat/webserver/pagelets/__init__.py

@@ -7,6 +7,7 @@ A new pagelet function must be imported here to be automatically loaded when the
 from .main import main_page
 from .login import login_page
 from .logout import logout
+from .signup import signup
 from .touchkey import touchkey_page
 from .buy import buy
 from .deposit import deposit

matemat/webserver/pagelets/admin.py

@@ -163,14 +163,14 @@ def handle_admin_change(args: FormsDict, files: FormsDict, db: MatematDatabase):
         # The user requested to create a new user
         if change == 'newuser':
             # Only create a new user if all required properties of the user are present in the request arguments
-            if 'username' not in args or 'email' not in args or 'password' not in args:
+            if 'username' not in args or 'password' not in args:
                 return
             # Read the properties from the request arguments
             username = str(args.username)
-            email = str(args.email)
-            # An empty e-mail field should be interpreted as NULL
-            if len(email) == 0:
             email = None
+            if 'email' in args and len(args.email) > 0:
+                # An empty e-mail field should be interpreted as NULL
+                email = str(args.email)
             password = str(args.password)
             is_member = 'ismember' in args
             is_admin = 'isadmin' in args

matemat/webserver/pagelets/main.py

@@ -34,4 +34,5 @@ def main_page():
             # If no user is logged in, fetch the list of users and render the userlist template
             users = db.list_users(with_touchkey=True)
             return template.render('userlist.html',
-                                   users=users, setupname=config['InstanceName'])
+                                   users=users, setupname=config['InstanceName'],
+                                   signup=(config.get('SignupEnabled', '0') == '1'))

matemat/webserver/pagelets/signup.py

@@ -0,0 +1,93 @@
+
+import os
+from shutil import copyfile
+from io import BytesIO
+
+import magic
+from bottle import get, post, redirect, abort, request, FormsDict
+from PIL import Image
+
+from matemat.db import MatematDatabase
+from matemat.db.primitives import User
+from matemat.webserver import template, session
+from matemat.webserver.config import get_app_config
+
+
+def signup_user(args: FormsDict, files: FormsDict, db: MatematDatabase) -> User:
+    config = get_app_config()
+    if 'username' not in args or 'password' not in args or 'password2' not in args:
+        raise ValueError('Required fields missing')
+    username = str(args.username)
+    password = str(args.password)
+    password2 = str(args.password2)
+    if password != password2:
+        raise ValueError('Passwords do not match')
+    email = None
+    if 'email' in args and len(args.email) > 0:
+        email = str(args.email)
+
+    new_user = db.create_user(username, password, email=email, admin=False, member=False)
+    # If a touchkey was provided, set it
+    if 'touchkey' in args and len(args.touchkey) > 0:
+        touchkey = str(args.touchkey)
+        db.change_touchkey(new_user, password, touchkey, verify_password=False)
+    # Finally, set the avatar, if provided
+    if 'avatar' in files:
+        avatar = files.avatar.file.read()
+        if len(avatar) > 0:
+            filemagic: magic.FileMagic = magic.detect_from_content(avatar)
+            if filemagic.mime_type.startswith('image/'):
+                abspath: str = os.path.join(os.path.abspath(config['UploadDir']), 'thumbnails/users/')
+                os.makedirs(abspath, exist_ok=True)
+                # Parse the image data
+                image: Image = Image.open(BytesIO(avatar))
+                # Resize the image to 150x150
+                image.thumbnail((150, 150), Image.LANCZOS)
+                # Write the image to the file
+                image.save(os.path.join(abspath, f'{new_user.id}.png'), 'PNG')
+    else:
+        # If a default avatar is set, copy it to the user's avatar path
+        # Create the absolute path of the upload directory
+        abspath: str = os.path.join(os.path.abspath(config['UploadDir']), 'thumbnails/users/')
+        # Derive the individual paths
+        default: str = os.path.join(abspath, 'default.png')
+        userimg: str = os.path.join(abspath, f'{new_user.id}.png')
+        # Copy the default image, if it exists
+        if os.path.exists(default):
+            copyfile(default, userimg, follow_symlinks=True)
+    return new_user
+
+
+@get('/signup')
+@post('/signup')
+def signup():
+    """
+    The password login mechanism.  If called via GET, render the UI template; if called via POST, attempt to log in with
+    the provided credentials (username and passsword).
+    """
+    config = get_app_config()
+    session_id: str = session.start()
+    # If signup is not enabled, redirect to the main page
+    if config.get('SignupEnabled', '0') != '1':
+        redirect('/')
+    # If a user is already logged in, simply redirect to the main page, showing the product list
+    if session.has(session_id, 'authenticated_user'):
+        redirect('/')
+    # If requested via HTTP POST, read the request arguments and attempt to create a new user
+    if request.method == 'POST':
+        # Connect to the database and create the user
+        with MatematDatabase(config['DatabaseFile']) as db:
+            try:
+                user = signup_user(request.params, request.files, db)
+            except ValueError as e:
+                redirect('/signup')
+            # Set the user ID session variable
+            session.put(session_id, 'authenticated_user', user.id)
+            # Set the authlevel session variable (0 = none, 1 = touchkey, 2 = password login)
+            session.put(session_id, 'authentication_level', 2)
+            # Redirect to the main page, showing the product list
+            redirect('/')
+    elif request.method != 'GET':
+        abort(405, 'Method not allowed')
+    return template.render('signup.html',
+                           setupname=config['InstanceName'])

package/debian/matemat/DEBIAN/control

@@ -1,5 +1,5 @@
 Package: matemat
-Version: 0.2.10
+Version: 0.2.11
 Maintainer: s3lph <account-gitlab-ideynizv@kernelpanic.lol>
 Section: web
 Priority: optional

templates/signup.html

@@ -0,0 +1,39 @@
+{% extends "base.html" %}
+
+{% block header %}
+    <h1>Signup</h1>
+    {{ super() }}
+{% endblock %}
+
+{% block main %}
+
+    {# Show a username/password signup form #}
+    <form method="post" action="/signup" id="signupform" enctype="multipart/form-data" accept-charset="UTF-8">
+        <label for="signup-username"><b>Username</b>: </label>
+        <input id="signup-username" type="text" name="username" required="required"/><br/>
+
+        <label for="signup-password"><b>Choose a password</b>: </label>
+        <input id="signup-password" type="password" name="password" required="required"/><br/>
+
+        <label for="signup-password2"><b>Repeat password</b>: </label>
+        <input id="signup-password2" type="password" name="password2" required="required"/><br/>
+
+        <label for="signup-avatar">Upload a profile picture: </label>
+        <input id="signup-avatar" type="file" name="avatar" accept="image/*" /><br/>
+
+        <label for="signup-touchkey">Draw a touchkey (touchscreen login pattern)</label>
+        <br/>
+        <svg id="touchkey-svg" width="400" height="400"></svg>
+        <br/>
+        <input id="signup-touchkey" type="hidden" name="touchkey" value="" />
+
+        <input type="submit" value="Create account">
+    </form>
+    <script src="/static/js/touchkey.js" ></script>
+    <script>
+        initTouchkey(true, 'touchkey-svg', null, 'signup-touchkey');
+    </script>
+
+    {{ super() }}
+
+{% endblock %}

templates/userlist.html

@@ -23,6 +23,9 @@
     <br/>
     {# Link to the password login #}
     <a href="/login">Password login</a>
+    {% if signup %}
+    <a href="/signup">Create account</a>
+    {% endif %}
 
     {{ super() }}