Added selecting database to Readme

Added options for different database engines

.env.example

@@ -1,10 +1,21 @@
 SERVER_NAME= # URL where this will be hosted.
+FLASK_DEBUG=False
 
 TZ=Europe/London # Time Zone
 
-## Flask Configuration
+## App Configuration
 SECRET_KEY= # Long, secure, secret string.
 DATA=./data/
+DATABASE_TYPE=SQLite # SQLite or MySQL, defaults to SQLite
+DATABASE_HOST= # Required if MySQL. Must match name of Docker service, or provide host if database is on an external server. Defaults to localhost.
+DATABASE_PORT= # Required if MySQL. Defaults to 3306
+
+## MySQL Database Configuration (Required if configured to MySQL Database.)
+# Note that if using the Docker service, these configuration values will also be used when creating the database in the mysql container.
+MYSQL_RANDOM_ROOT_PASSWORD=True
+MYSQL_DATABASE= # Required if MySQL.
+MYSQL_USER= # Required if MySQL
+MYSQL_PASSWORD= # Required if MySQL. Create secure password string. Note '@' character cannot be used.
 
 ## Flask Mail Configuration
 MAIL_SERVER=postfix # Must match name of the Docker service

.gitignore

@@ -153,3 +153,13 @@ database/data/
 
 # Ignore Data Dir
 **/data/*
+
+# Ignore Logs Dir
+logs/*
+
+# Ignore Certbot Dir
+certbot/*
+
+# Ignore src dir (exception for robots.txt)
+src/html/*
+src/html/robots.txt

README.md

@@ -57,6 +57,16 @@ Once in the destination folder, clone all the relevant files you will need for t
 
 (Remember to include the trailing dot at the end, as that indicates to Git to download the files in the current directory.)
 
+#### Choose What Database Engine You Will Use
+
+This app is designed to use an SQLite database by default.
+You can set it up to use a MySQL database by configuring the environment variables accordingly.
+If your database is being hosted remotely, make sure the MySQL database has the proper authentication for the user from a remote server.
+Alternatively, you can also use the second `docker-compose-mysql.yml` file which provides a MySQL database as part of the cluster.
+To use the second `docker-compose-mysql.yml` file, use the following command at the last step of the installation:
+
+```sudo docker compose -f docker-compose-mysql.yml up```
+
 #### Populate Environment Variables
 
 Configuration values for the app are stored in the environment variables file.

certbot/.gitignore

@@ -1,2 +0,0 @@
-*
-!.gitignore

docker-compose-mysql.yml

@@ -0,0 +1,90 @@
+version: '3.9'
+
+volumes:
+  app:
+  mysql:
+
+services:
+  nginx:
+    container_name: reftest_server
+    image: nginx:alpine
+    volumes:
+      - ./certbot:/etc/letsencrypt:ro
+      - ./nginx:/etc/nginx
+      - ./src/html/certbot:/usr/share/nginx/html/certbot:ro
+      - ./src/html/robots.txt:/usr/share/nginx/html/robots.txt:ro
+      - ./ref-test/app/root:/usr/share/nginx/html/root:ro
+      - ./ref-test/app/admin/static:/usr/share/nginx/html/admin/static:ro
+      - ./ref-test/app/editor/static:/usr/share/nginx/html/editor/static:ro
+      - ./ref-test/app/quiz/static:/usr/share/nginx/html/quiz/static:ro
+      - ./ref-test/app/view/static:/usr/share/nginx/html/view/static:ro
+    ports:
+      - 80:80
+      - 443:443
+    restart: unless-stopped
+    networks:
+      - frontend
+    depends_on:
+      app:
+    command: "/bin/sh -c 'while :; do sleep 6h & wait $${!}; nginx -s reload; done & nginx -g \"daemon off;\"'"
+  
+  app:
+    container_name: reftest_app
+    image: reftest
+    build: ./ref-test
+    env_file:
+      - ./.env
+    ports:
+      - 5000
+    volumes:
+      - app:/ref-test/data
+      - ./logs:/ref-test/data/logs
+    restart: unless-stopped
+    networks:
+      - frontend
+      - backend
+    depends_on:
+      postfix:
+      mysql:
+        condition: service_healthy
+
+  postfix:
+    container_name: reftest_postfix
+    image: catatnight/postfix:latest
+    restart: unless-stopped
+    env_file:
+      - ./.env
+    ports:
+      - 25
+    networks:
+      - backend
+  
+  certbot:
+    container_name: reftest_certbot
+    image: certbot/certbot
+    volumes:
+      - ./certbot:/etc/letsencrypt
+      - ./src/html/certbot:/var/www/html
+    entrypoint: "/bin/sh -c 'trap exit TERM; while :; do certbot renew; sleep 12h & wait $${!}; done;'"
+  
+  mysql:
+    container_name: reftest_db
+    image: mysql:8.0
+    env_file:
+      - ./.env
+    volumes:
+      - mysql:/var/lib/mysql
+    ports:
+      - 3306
+    networks:
+      - backend
+    healthcheck:
+      test: ["CMD", "mysqladmin" ,"ping", "-h", "localhost"]
+      timeout: 10s
+      retries: 10
+
+networks:
+  frontend:
+    external: false
+  backend:
+    external: false

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.9'
 
 volumes:
-  data:
+  app:
 
 services:
   nginx:
@@ -10,6 +10,7 @@ services:
     volumes:
       - ./certbot:/etc/letsencrypt:ro
       - ./nginx:/etc/nginx
+      - ./src/html/certbot:/usr/share/nginx/html/certbot:ro
       - ./src/html/robots.txt:/usr/share/nginx/html/robots.txt:ro
       - ./ref-test/app/root:/usr/share/nginx/html/root:ro
       - ./ref-test/app/admin/static:/usr/share/nginx/html/admin/static:ro
@@ -23,7 +24,7 @@ services:
     networks:
       - frontend
     depends_on:
-      - app
+      app:
     command: "/bin/sh -c 'while :; do sleep 6h & wait $${!}; nginx -s reload; done & nginx -g \"daemon off;\"'"
   
   app:
@@ -35,13 +36,14 @@ services:
     ports:
       - 5000
     volumes:
-      - data:/ref-test/data
+      - app:/ref-test/data
+      - ./logs:/ref-test/data/logs
     restart: unless-stopped
     networks:
       - frontend
       - backend
     depends_on:
-      - postfix
+      postfix:
 
   postfix:
     container_name: reftest_postfix
@@ -59,7 +61,7 @@ services:
     image: certbot/certbot
     volumes:
       - ./certbot:/etc/letsencrypt
-      - ./src/html:/var/www/html
+      - ./src/html/certbot:/var/www/html
     entrypoint: "/bin/sh -c 'trap exit TERM; while :; do certbot renew; sleep 12h & wait $${!}; done;'"
   
 networks:

nginx/certbot-challenge.conf

@@ -1,6 +1,6 @@
 # Certbot Renewal
 location ^~ /.well-known/acme-challenge/ {
-    root /usr/share/nginx/html;
+    root /usr/share/nginx/html/certbot;
     allow all;
     default_type "text/plain";
 }

ref-test/.dockerignore

@@ -1,2 +1,3 @@
 env/
 __pycache__/
+data/

ref-test/Dockerfile

@@ -4,5 +4,5 @@ ENV DATA=$DATA
 WORKDIR /ref-test
 COPY . .
 RUN pip install --upgrade pip && pip install -r requirements.txt
-RUN chmod +x install.py && ./install.py
+RUN chmod +x install.py reset.py && ./install.py
 CMD [ "gunicorn", "-b", "0.0.0.0:5000", "-w", "5", "wsgi:app" ]

ref-test/app/__init__.py

@@ -1,9 +1,10 @@
 from .config import Production as Config
-from .models import User
+from .models import *
 from .extensions import bootstrap, csrf, db, login_manager, mail
+from .tools.logs import write
 
 from flask import flash, Flask, render_template, request
-from flask.helpers import url_for
+from flask.helpers import abort, url_for
 from flask.json import jsonify
 from flask_wtf.csrf import CSRFError
 from werkzeug.middleware.proxy_fix import ProxyFix
@@ -24,13 +25,16 @@ def create_app():
     login_manager.login_view = 'admin._login'
     @login_manager.user_loader
     def _load_user(id):
-        return User.query.filter_by(id=id).first()
+        try: return User.query.filter_by(id=id).first()
+        except Exception as exception:
+            write('system.log', f'Database error when loading user fo login manager: {exception}')
+            return abort(500)
 
     @app.before_request
     def _check_cookie_consent():
         if request.cookies.get('cookie_consent'):
             return
-        if any([ request.path.startswith(x) for x in [ '/admin/static/', '/root/', '/quiz/static', '/cookies/', '/admin/editor/static' ] ]):
+        if any([ request.path.startswith(x) for x in [ '/admin/static/', '/root/', '/quiz/static', '/cookies/', '/admin/editor/static', '/admin/view/static' ] ]):
             return
         flash(f'<strong>Cookie Consent</strong>: This web site only stores minimal, functional cookies. It does not store any tracking information. By using this site, you consent to this use of cookies. For more information, see our <a href="{url_for("views._privacy")}">privacy policy</a>.', 'cookie_alert')
 
@@ -55,4 +59,10 @@ def create_app():
     app.register_blueprint(editor, url_prefix='/admin/editor')
     app.register_blueprint(view, url_prefix='/admin/view')
 
+    """Create Database Tables before First Request"""
+    @app.before_first_request
+    def _create_database_tables():
+        with app.app_context():
+            db.create_all()
+
     return app

ref-test/app/admin/views.py

@@ -1,12 +1,13 @@
 from ..forms.admin import AddTimeAdjustment, CreateTest, CreateUser, DeleteUser, Login, Register, ResetPassword, UpdatePassword, UpdateUser, UploadData
 from ..models import Dataset, Entry, Test, User
 from ..tools.auth import disable_if_logged_in, require_account_creation
-from ..tools.forms import get_dataset_choices, get_time_options, send_errors_to_client
 from ..tools.data import check_dataset_exists, check_is_json, validate_json
+from ..tools.forms import get_dataset_choices, get_time_options, send_errors_to_client
+from ..tools.logs import write
 from ..tools.test import  answer_options, get_correct_answers
 
-from flask import abort, Blueprint, jsonify, render_template, redirect, request, send_file, session
-from flask.helpers import flash, url_for
+from flask import abort, Blueprint, jsonify, render_template, request, send_file, session
+from flask.helpers import abort, flash, redirect, url_for
 from flask_login import current_user, login_required
 
 from datetime import date, datetime, timedelta
@@ -26,8 +27,12 @@ admin = Blueprint(
 @admin.route('/dashboard/')
 @login_required
 def _home():
-    tests = Test.query.all()
-    results = Entry.query.all()
+    try:
+        tests = Test.query.all()
+        results = Entry.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     current_tests = [ test for test in tests if test.end_date >= datetime.now() and test.start_date.date() <= date.today() ]
     current_tests.sort(key= lambda x: x.end_date, reverse=True)
     upcoming_tests = [ test for test in tests if test.start_date.date() > datetime.now().date()]
@@ -39,8 +44,12 @@ def _home():
 @admin.route('/settings/')
 @login_required
 def _settings():
-    users = User.query.all()
-    datasets = Dataset.query.all()
+    try:
+        users = User.query.all()
+        datasets = Dataset.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     return render_template('/admin/settings/index.html', users=users, datasets=datasets)
 
 @admin.route('/login/', methods=['GET','POST'])
@@ -50,7 +59,10 @@ def _login():
     form = Login()
     if request.method == 'POST':
         if form.validate_on_submit():
-            users = User.query.all()
+            try: users = User.query.all()
+            except Exception as exception:
+                write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+                return abort(500)
             user = None
             for _user in users:
                 if _user.get_username() == request.form.get('username').lower():
@@ -99,7 +111,10 @@ def _reset():
     if request.method == 'POST':
         if form.validate_on_submit():
             user = None
-            users = User.query.all()
+            try: users = User.query.all()
+            except Exception as exception:
+                write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+                return abort(500)
             for _user in users:
                 if _user.get_username() == request.form.get('username'):
                     user = _user
@@ -111,7 +126,10 @@ def _reset():
     
     token = request.args.get('token')
     if token:
-        user = User.query.filter_by(reset_token=token).first()
+        try: user = User.query.filter_by(reset_token=token).first()
+        except Exception as exception:
+            write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+            return abort(500)
         if not user: return redirect(url_for('admin._reset'))
         verification_token = user.verification_token
         user.clear_reset_tokens()
@@ -128,7 +146,10 @@ def _update_password():
     form = UpdatePassword()
     if form.validate_on_submit():
         user = session.pop('user')
-        user = User.query.filter_by(id=user).first()
+        try: user = User.query.filter_by(id=user).first()
+        except Exception as exception:
+            write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+            return abort(500)
         user.update(password=request.form.get('password'))
         session['remembered_username'] = user.get_username()
         flash('Your password has been reset.', 'success')
@@ -139,7 +160,10 @@ def _update_password():
 @login_required
 def _users():
     form = CreateUser()
-    users = User.query.all()
+    try: users = User.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if request.method == 'POST':
         if form.validate_on_submit():
             password = request.form.get('password')
@@ -156,7 +180,10 @@ def _users():
 @admin.route('/settings/users/delete/<string:id>', methods=['GET', 'POST'])
 @login_required
 def _delete_user(id:str):
-    user = User.query.filter_by(id=id).first()
+    try: user = User.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     form = DeleteUser()
     if request.method == 'POST': 
         if not user: return jsonify({'error': 'User does not exist.'}), 400
@@ -180,7 +207,10 @@ def _delete_user(id:str):
 @admin.route('/settings/users/update/<string:id>', methods=['GET', 'POST'])
 @login_required
 def _update_user(id:str):
-    user = User.query.filter_by(id=id).first()
+    try: user = User.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     form = UpdateUser()
     if request.method == 'POST': 
         if not user: return jsonify({'error': 'User does not exist.'}), 400
@@ -222,7 +252,10 @@ def _questions():
             return jsonify({'error': message}), 400
         return send_errors_to_client(form=form)
 
-    data = Dataset.query.all()
+    try: data = Dataset.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     return render_template('/admin/settings/questions.html', form=form, data=data)
 
 @admin.route('/settings/questions/delete/', methods=['POST'])
@@ -231,7 +264,10 @@ def _edit_questions():
     id = request.get_json()['id']
     action = request.get_json()['action']
     if not action == 'delete': return jsonify({'error': 'Invalid action.'}), 400
-    dataset = Dataset.query.filter_by(id=id).first()
+    try: dataset = Dataset.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if action == 'delete': success, message = dataset.delete()
     if success: return jsonify({'success': message}), 200
     return jsonify({'error': message}), 400
@@ -239,7 +275,10 @@ def _edit_questions():
 @admin.route('/settings/questions/download/<string:id>/')
 @login_required
 def _download(id:str):
-    dataset = Dataset.query.filter_by(id=id).first()
+    try: dataset = Dataset.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not dataset: return abort(404)
     data_path = path.abspath(dataset.get_file())
     return send_file(data_path, as_attachment=True, attachment_filename=f'{dataset.get_name()}.json')
@@ -250,7 +289,10 @@ def _download(id:str):
 @check_dataset_exists
 def _tests(filter:str=None):
     tests = None
-    _tests = Test.query.all()
+    try: _tests = Test.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     form = None
     now = datetime.now()
     if filter not in ['create','active','scheduled','expired','all']: return redirect(url_for('admin._tests', filter='active'))
@@ -296,7 +338,10 @@ def _create_test():
         new_test.end_date = datetime.strptime(new_test.end_date, '%Y-%m-%dT%H:%M')
         new_test.time_limit = None if request.form.get('time_limit') == 'none' else int(request.form.get('time_limit'))
         dataset = request.form.get('dataset')
-        new_test.dataset = Dataset.query.filter_by(id=dataset).first()
+        try: new_test.dataset = Dataset.query.filter_by(id=dataset).first()
+        except Exception as exception:
+            write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+            return abort(500)
         success, message = new_test.create()
         if success:
             flash(message=message, category='success')
@@ -310,7 +355,10 @@ def _edit_test():
     id = request.get_json()['id']
     action = request.get_json()['action']
     if action not in ['start', 'delete', 'end']: return jsonify({'error': 'Invalid action.'}), 400
-    test = Test.query.filter_by(id=id).first()
+    try: test = Test.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not test: return jsonify({'error': 'Could not find the corresponding test to delete.'}), 404
     if action == 'delete': success, message = test.delete()
     if action == 'start': success, message = test.start()
@@ -324,7 +372,10 @@ def _edit_test():
 @login_required
 def _view_test(id:str=None):    
     form = AddTimeAdjustment()
-    test = Test.query.filter_by(id=id).first()
+    try: test = Test.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if request.method == 'POST':
         if not test: return jsonify({'error': 'Invalid test ID.'}), 404
         if form.validate_on_submit():
@@ -341,7 +392,10 @@ def _view_test(id:str=None):
 @admin.route('/test/<string:id>/delete-adjustment/', methods=['POST'])
 @login_required
 def _delete_adjustment(id:str=None):
-    test = Test.query.filter_by(id=id).first()
+    try: test = Test.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not test: return jsonify({'error': 'Invalid test ID.'}), 404
     user_code = request.get_json()['user_code'].lower()
     success, message = test.remove_adjustment(user_code)
@@ -351,13 +405,19 @@ def _delete_adjustment(id:str=None):
 @admin.route('/results/')
 @login_required
 def _view_entries():
-    entries = Entry.query.all()
+    try: entries = Entry.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     return render_template('/admin/results.html', entries = entries)
 
 @admin.route('/results/<string:id>/', methods = ['GET', 'POST'])
 @login_required
 def _view_entry(id:str=None):
-    entry = Entry.query.filter_by(id=id).first()
+    try: entry = Entry.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if request.method == 'POST':
         if not entry: return jsonify({'error': 'Invalid entry ID.'}), 404
         action = request.get_json()['action']
@@ -388,6 +448,9 @@ def _view_entry(id:str=None):
 def _generate_certificate():
     from ..extensions import db
     id = request.get_json()['id']
-    entry = Entry.query.filter_by(id=id).first()
+    try: entry = Entry.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not entry: return jsonify({'error': 'Invalid entry ID.'}), 404
     return render_template('/admin/components/certificate.html', entry = entry)

ref-test/app/api/views.py

@@ -1,8 +1,10 @@
 from ..models import Dataset, Entry, User
 from ..tools.data import validate_json
+from ..tools.logs import write
 from ..tools.test import evaluate_answers, generate_questions
 
-from flask import Blueprint, flash, jsonify, request, url_for
+from flask import Blueprint, jsonify, request
+from flask.helpers import abort, flash, url_for
 from flask_login import login_required
 
 from datetime import datetime, timedelta
@@ -16,7 +18,10 @@ api = Blueprint(
 @api.route('/questions/', methods=['POST'])
 def _fetch_questions():
     id = request.get_json()['id']
-    entry = Entry.query.filter_by(id=id).first()
+    try: entry = Entry.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not entry: return jsonify({'error': 'Invalid entry ID.'}), 400
     test = entry.test
     user_code = entry.user_code
@@ -50,7 +55,10 @@ def _fetch_questions():
 def _submit_quiz():
     id = request.get_json()['id']
     answers = request.get_json()['answers']
-    entry = Entry.query.filter_by(id=id).first()
+    try: entry = Entry.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not entry: return jsonify({'error': 'Unrecognised Entry.'}), 400
     test = entry.test
     dataset = test.dataset
@@ -71,7 +79,10 @@ def _submit_quiz():
 def _editor(id:str=None):
     request_data = request.get_json()
     id = request_data['id']
-    dataset = Dataset.query.filter_by(id=id).first()
+    try: dataset = Dataset.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not dataset: return jsonify({'error': 'Invalid request. Dataset not found.'}), 404
     data_path = dataset.get_file()
     if request_data['action'] == 'fetch':
@@ -80,10 +91,13 @@ def _editor(id:str=None):
         return jsonify({'success': 'Successfully downloaded dataset', 'data': data}), 200
     default = request_data['default']
     creator = request_data['creator']
+    try: user = User.query.filter_by(id=creator).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     name = request_data['name']
     data = request_data['data']
     if not validate_json(data): return jsonify({'error': 'The data you submitted was invalid.'}), 400
-    user = User.query.filter_by(id=creator).first()
     dataset.set_name(name)
     dataset.creator = user
     success, message = dataset.update(data=data, default=default)

ref-test/app/config.py

@@ -4,6 +4,7 @@ from dotenv import load_dotenv
 load_dotenv('../.env')
 
 class Config(object):
+    """Basic App Configuration"""
     APP_HOST = '0.0.0.0'
     DATA = './data/'
     DEBUG = False
@@ -11,9 +12,8 @@ class Config(object):
     SECRET_KEY = os.getenv('SECRET_KEY')
     SERVER_NAME = os.getenv('SERVER_NAME')
     SESSION_COOKIE_SECURE = True
-    SQLALCHEMY_DATABASE_URI = f'sqlite:///{Path(os.path.abspath(f"{DATA}/database.db"))}'
-    SQLALCHEMY_TRACK_MODIFICATIONS = False
 
+    """Email Engine Configuration"""
     MAIL_SERVER = os.getenv('MAIL_SERVER')
     MAIL_PORT = int(os.getenv('MAIL_PORT') or 25)
     MAIL_USE_TLS = False
@@ -26,6 +26,19 @@ class Config(object):
     MAIL_SUPPRESS_SEND = False
     MAIL_ASCII_ATTACHMENTS = bool(os.getenv('MAIL_ASCII_ATTACHMENTS') or True)
 
+    """Database Driver Configuration"""
+    DATABASE_TYPE = os.getenv('DATABASE_TYPE') or 'SQLite'
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+    if DATABASE_TYPE.lower() == 'mysql' and os.getenv('MYSQL_DATABASE') and os.getenv('MYSQL_USER') and os.getenv('MYSQL_PASSWORD'):
+        DATABASE_HOST = os.getenv('DATABASE_HOST') or 'localhost'
+        DATABASE_PORT = int(os.getenv('DATABASE_PORT') or 3306)
+        MYSQL_DATABASE = os.getenv('MYSQL_DATABASE')
+        MYSQL_USER = os.getenv('MYSQL_USER')
+        MYSQL_PASSWORD = os.getenv('MYSQL_PASSWORD')
+        SQLALCHEMY_DATABASE_URI = f'mysql+pymysql://{MYSQL_USER}:{MYSQL_PASSWORD}@{DATABASE_HOST}:{DATABASE_PORT}/{MYSQL_DATABASE}'
+    else: SQLALCHEMY_DATABASE_URI = f'sqlite:///{Path(os.path.abspath(f"{DATA}/database.db"))}'
+
 class Production(Config):
     pass
 

ref-test/app/editor/views.py

@@ -1,10 +1,11 @@
 from ..forms.admin import EditDataset
 from ..models import Dataset, User
-from ..tools.forms import get_dataset_choices, send_errors_to_client
 from ..tools.data import check_dataset_exists
+from ..tools.forms import get_dataset_choices, send_errors_to_client
+from ..tools.logs import write
 
-from flask import Blueprint, flash, jsonify, redirect, render_template, request
-from flask.helpers import url_for
+from flask import Blueprint, jsonify, render_template
+from flask.helpers import abort, flash, redirect, request, url_for
 from flask_login import login_required
 
 editor = Blueprint(
@@ -31,9 +32,13 @@ def _editor():
 @check_dataset_exists
 @login_required
 def _editor_console(id:str=None):
-    dataset = Dataset.query.filter_by(id=id).first()
-    datasets = Dataset.query.count()
-    users = User.query.all()
+    try:
+        dataset = Dataset.query.filter_by(id=id).first()
+        datasets = Dataset.query.count()
+        users = User.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not dataset:
         flash('Invalid dataset ID.', 'error')
         return redirect(url_for('admin._questions'))

ref-test/app/forms/admin.py

@@ -8,44 +8,44 @@ from wtforms.validators import InputRequired, Email, EqualTo, Length, Optional
 
 class Login(FlaskForm):
     username = StringField('Username', validators=[InputRequired(), Length(min=4, max=15)])
-    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     remember = BooleanField('Remember Log In', render_kw={'checked': True})
 
 class Register(FlaskForm):
     username = StringField('Username', validators=[InputRequired(), Length(min=4, max=15)])
     email = StringField('Email Address', validators=[InputRequired(), Email(message='You must enter a valid email address.'), Length(max=50)])
-    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
-    password_reenter = PasswordField('Re-Enter Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.'), EqualTo('password', message='Passwords do not match.')])
+    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
+    password_reenter = PasswordField('Re-Enter Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.'), EqualTo('password', message='Passwords do not match.')])
 
 class ResetPassword(FlaskForm):
     username = StringField('Username', validators=[InputRequired(), Length(min=4, max=15)])
     email = StringField('Email Address', validators=[InputRequired(), Email(message='You must enter a valid email address.'), Length(max=50)])
 
 class UpdatePassword(FlaskForm):
-    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
-    password_reenter = PasswordField('Re-Enter Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.'), EqualTo('password', message='Passwords do not match.')])
+    password = PasswordField('Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
+    password_reenter = PasswordField('Re-Enter Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.'), EqualTo('password', message='Passwords do not match.')])
 
 class CreateUser(FlaskForm):
     username = StringField('Username', validators=[InputRequired(), Length(min=4, max=15)])
     email = StringField('Email Address', validators=[InputRequired(), Email(message='You must enter a valid email address.'), Length(max=50)])
-    password = PasswordField('Password (Optional)', validators=[Optional(),Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    password = PasswordField('Password (Optional)', validators=[Optional(),Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     notify = BooleanField('Notify accout creation by email', render_kw={'checked': True})
 
 class DeleteUser(FlaskForm):
-    password = PasswordField('Confirm Your Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    password = PasswordField('Confirm Your Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     notify = BooleanField('Notify deletion by email', render_kw={'checked': True})
 
 class UpdateUser(FlaskForm):
-    confirm_password = PasswordField('Confirm Your Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    confirm_password = PasswordField('Confirm Your Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     email = StringField('Email Address', validators=[Optional(), Email(message='You must enter a valid email address.'), Length(max=50)])
-    password = PasswordField('Change Password', validators=[Optional(),Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    password = PasswordField('Change Password', validators=[Optional(),Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     password_reenter = PasswordField('Re-Enter New Password', validators=[EqualTo('password', message='Passwords do not match.')])
     notify = BooleanField('Notify changes by email', render_kw={'checked': True})
 
 class UpdateAccount(FlaskForm):
-    confirm_password = PasswordField('Current Password', validators=[InputRequired(), Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    confirm_password = PasswordField('Current Password', validators=[InputRequired(), Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     email = StringField('Email Address', validators=[Optional(), Email(message='You must enter a valid email address.'), Length(max=50)])
-    password = PasswordField('Change Password', validators=[Optional(),Length(min=6, max=30, message='The password must be between 6 and 20 characters long.')])
+    password = PasswordField('Change Password', validators=[Optional(),Length(min=6, max=20, message='The password must be between 6 and 20 characters long.')])
     password_reenter = PasswordField('Re-Enter New Password', validators=[EqualTo('password', message='Passwords do not match.')])
 
 class CreateTest(FlaskForm):

ref-test/app/models/dataset.py

@@ -2,8 +2,8 @@ from ..extensions import db
 from ..tools.encryption import decrypt, encrypt
 from ..tools.logs import write
 
-from flask import flash
 from flask import current_app as app
+from flask.helpers import flash
 from flask_login import current_user
 from werkzeug.utils import secure_filename
 
@@ -42,10 +42,17 @@ class Dataset(db.Model):
     def get_name(self): return decrypt(self.name)
 
     def make_default(self):
-        for dataset in Dataset.query.all():
-            dataset.default = False
+        try:
+            for dataset in Dataset.query.all(): dataset.default = False
+        except Exception as exception:
+            write('system.log', f'Database error when setting default dataset {self.id}: {exception}')
+            return False, f'Database error {exception}.'
         self.default = True
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when setting default dataset {self.id}: {exception}')
+            return False, f'Database error {exception}.'
         write('system.log', f'Dataset {self.id} set as default by {current_user.get_username()}.')
         flash(message='Dataset set as default.', category='success')
         return True, f'Dataset set as default.'
@@ -55,17 +62,26 @@ class Dataset(db.Model):
             message = 'Cannot delete the default dataset.'
             flash(message, 'error')
             return False, message
-        if Dataset.query.count() == 1:
-            message = 'Cannot delete the only dataset.'
-            flash(message, 'error')
-            return False, message
+        try:
+            if Dataset.query.count() == 1:
+                message = 'Cannot delete the only dataset.'
+                flash(message, 'error')
+                return False, message
+        except Exception as exception:
+            write('system.log', f'Database error when setting default dataset {self.id}: {exception}')
+            return False, f'Database error {exception}.'
         write('system.log', f'Dataset {self.id} deleted by {current_user.get_username()}.')
         filename = secure_filename('.'.join([self.id,'json']))
         data = Path(app.config.get('DATA'))
         file_path = path.join(data, 'questions', filename)
+        try:
+            db.session.delete(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when trying to delete dataset {self.id}: {exception}')
+            return False, f'Database error: {exception}'
         remove(file_path)
-        db.session.delete(self)
-        db.session.commit()
         return True, 'Dataset deleted.'
     
     def create(self, data:list, default:bool=False):
@@ -78,8 +94,13 @@ class Dataset(db.Model):
         self.creator = current_user
         if default: self.make_default()
         write('system.log', f'New dataset {self.get_name()} added by {current_user.get_username()}.')
-        db.session.add(self)
-        db.session.commit()
+        try:
+            db.session.add(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when trying to crreate dataset {self.id}: {exception}')
+            return False, f'Database error: {exception}'
         return True, 'Dataset created.'
 
     def check_file(self):
@@ -103,6 +124,11 @@ class Dataset(db.Model):
             dump(data, file, indent=2)
         write('system.log', f'Dataset {self.id} edited by {current_user.get_username()}.')
         flash(f'Dataset {self.get_name()} successfully edited.', 'success')
-        db.session.add(self)
-        db.session.commit()
+        try:
+            db.session.add(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when trying to update dataset {self.id}: {exception}')
+            return False, f'Database error: {exception}'
         return True, 'Dataset successfully edited.'

ref-test/app/models/entry.py

@@ -1,12 +1,11 @@
 from ..extensions import db, mail
-from ..tools.forms import JsonEncodedDict
 from ..tools.encryption import decrypt, encrypt
 from ..tools.logs import write
 from .test import Test
 
 from flask_login import current_user
 from flask_mail import Message
-from smtplib import SMTPException
+from sqlalchemy_json import MutableJson
 
 from datetime import datetime, timedelta
 from uuid import uuid4
@@ -24,8 +23,8 @@ class Entry(db.Model):
     end_time = db.Column(db.DateTime, nullable=True)
     status = db.Column(db.String(16), nullable=True)
     valid = db.Column(db.Boolean, default=True, nullable=True)
-    answers = db.Column(JsonEncodedDict, nullable=True)
-    result = db.Column(JsonEncodedDict, nullable=True)
+    answers = db.Column(MutableJson, nullable=True)
+    result = db.Column(MutableJson, nullable=True)
     
     def __repr__(self):
         return f'<New entry by {self.first_name} {self.surname}> was added with <id {self.id}>.'
@@ -70,23 +69,31 @@ class Entry(db.Model):
 
     def ready(self):
         self.generate_id()
-        db.session.add(self)
-        db.session.commit()
-        write('tests.log', f'New test ready for {self.get_first_name()} {self.get_surname()}.')
+        try:
+            db.session.add(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when preparing new entry for {self.get_surname()}, {self.get_first_name()}: {exception}')
+            return False, f'Database error: {exception}'
+        write('tests.log', f'New test ready for {self.get_surname()}, {self.get_first_name()} with id {self.id}.')
         return True, f'Test ready.'
 
     def start(self):
         self.start_time = datetime.now()
         self.status = 'started'
-        write('tests.log', f'Test started by {self.get_first_name()} {self.get_surname()}.')
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when starting test for {self.get_surname()}, {self.get_first_name()}: {exception}')
+            return False, f'Database error: {exception}'
+        write('tests.log', f'Test started by {self.get_surname()}, {self.get_first_name()} with id {self.id}.')
         return True, f'New test started with id {self.id}.'
 
     def complete(self, answers:dict=None, result:dict=None):
         self.end_time = datetime.now()
         self.answers = answers
         self.result = result
-        write('tests.log', f'Test completed by {self.get_first_name()} {self.get_surname()}.')
         delta = timedelta(minutes=int(0 if self.test.time_limit is None else self.test.time_limit)+1)
         if not self.test.time_limit or self.end_time <= self.start_time + delta:
             self.status = 'completed'
@@ -94,7 +101,12 @@ class Entry(db.Model):
         else:
             self.status = 'late'
             self.valid = False
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when submitting entry for {self.get_surname()}, {self.get_first_name()}: {exception}')
+            return False, f'Database error: {exception}'
+        write('tests.log', f'Test completed by {self.get_surname()}, {self.get_first_name()} with id {self.id}.')
         return True, f'Test entry completed for id {self.id}.'
 
     def validate(self):
@@ -102,15 +114,24 @@ class Entry(db.Model):
         if self.status == 'started': return False, 'The entry is still pending.'
         self.valid = True
         self.status = 'completed'
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when validating entry {self.id}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'The entry {self.id} has been validated by {current_user.get_username()}.')
         return True, f'The entry {self.id} has been validated.'
 
     def delete(self):
         id = self.id
         name = f'{self.get_first_name()} {self.get_surname()}'
-        db.session.delete(self)
-        db.session.commit()
+        try:
+            db.session.delete(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when deleting entry {id}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'The entry {id} by {name} has been deleted by {current_user.get_username()}.')
         return True, 'Entry deleted.'
     
@@ -175,7 +196,5 @@ class Entry(db.Model):
             <p>Best wishes, <br/> SKA Refereeing</p>
             """
         )
-        try: 
-            mail.send(email)
-        except SMTPException as exception:
-            write('system.log', f'SMTP Error when trying to notify results to {self.get_surname()}, {self.get_first_name()} with error: {exception}')
+        try: mail.send(email)
+        except Exception as exception: write('system.log', f'SMTP Error when trying to notify results to {self.get_surname()}, {self.get_first_name()} with error: {exception}')

ref-test/app/models/test.py

@@ -1,8 +1,8 @@
 from ..extensions import db
-from ..tools.forms import JsonEncodedDict
 from ..tools.logs import write
 
 from flask_login import current_user
+from sqlalchemy_json import MutableJson
 
 from datetime import date, datetime
 import secrets
@@ -17,7 +17,7 @@ class Test(db.Model):
     time_limit = db.Column(db.Integer, nullable=True)
     creator_id = db.Column(db.String(36), db.ForeignKey('user.id'))
     dataset_id = db.Column(db.String(36), db.ForeignKey('dataset.id'))
-    adjustments = db.Column(JsonEncodedDict, nullable=True)
+    adjustments = db.Column(MutableJson, nullable=True)
     entries = db.relationship('Entry', backref='test')
 
     def __repr__(self):
@@ -52,16 +52,24 @@ class Test(db.Model):
             errors.append('The expiry date cannot be before the start date.')
         if errors:
             return False, errors
-        db.session.add(self)
-        db.session.commit()
+        try:
+            db.session.add(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when creating test {self.get_code()}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'Test with code {self.get_code()} created by {current_user.get_username()}.')
         return True, f'Test with code {self.get_code()} has been created.'
     
     def delete(self):
-        code = self.code
         if self.entries: return False, f'Cannot delete a test with submitted entries.'
         db.session.delete(self)
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when deleting test {self.get_code()}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'Test with code {self.get_code()} has been deleted by {current_user.get_username()}.')
         return True, f'Test with code {self.get_code()} has been deleted.'
     
@@ -69,7 +77,11 @@ class Test(db.Model):
         now = datetime.now()
         if self.start_date.date() > now.date():
             self.start_date = now
-            db.session.commit()
+            try: db.session.commit()
+            except Exception as exception:
+                db.session.rollback()
+                write('system.log', f'Database error when launching test {self.get_code()}: {exception}')
+                return False, f'Database error: {exception}'
             write('system.log', f'Test with code {self.get_code()} has been started by {current_user.get_username()}.')
             return True,  f'Test with code {self.get_code()} has been started.'
         return False, f'Test with code {self.get_code()} has already started.'
@@ -78,7 +90,11 @@ class Test(db.Model):
         now = datetime.now()
         if self.end_date >= now:
             self.end_date = now
-            db.session.commit()
+            try: db.session.commit()
+            except Exception as exception:
+                db.session.rollback()
+                write('system.log', f'Database error when closing test {self.get_code()}: {exception}')
+                return False, f'Database error: {exception}'
             write('system.log', f'Test with code {self.get_code()} ended by {current_user.get_username()}.')
             return True, f'Test with code {self.get_code()} has been ended.'
         return False, f'Test with code {self.get_code()} has already ended.'
@@ -88,7 +104,11 @@ class Test(db.Model):
         code = secrets.token_hex(3).lower()
         adjustments[code] = time
         self.adjustments = adjustments
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when adding adjustment to test {self.get_code()}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'Time adjustment for {time} minutes with code {code} added to test {self.get_code()} by {current_user.get_username()}.')
         return True, f'Time adjustment for {time} minutes added to test {self.get_code()}. This can be accessed using the user code {code.upper()}.'
 
@@ -96,7 +116,11 @@ class Test(db.Model):
         if not self.adjustments: return False, f'There are no adjustments configured for test {self.get_code()}.'
         self.adjustments.pop(code)
         if not self.adjustments: self.adjustments = None
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when deleting adjustment from test {self.get_code()}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'Time adjustment for with code {code} has been removed from test {self.get_code()} by {current_user.get_username()}.')
         return True, f'Time adjustment for with code {code} has been removed from test {self.get_code()}.'
 
@@ -105,6 +129,10 @@ class Test(db.Model):
         if start_date: self.start_date = start_date
         if end_date: self.end_date = end_date
         if time_limit is not None: self.time_limit = time_limit
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when updating test {self.get_code()}: {exception}')
+            return False, f'Database error: {exception}'
         write('system.log', f'Test with code {self.get_code()} has been updated by user {current_user.get_username()}.')
         return True, f'Test with code {self.get_code()} has been updated by.'

ref-test/app/models/user.py

@@ -2,11 +2,10 @@ from ..extensions import db, mail
 from ..tools.encryption import decrypt, encrypt
 from ..tools.logs import write
 
-from flask import flash, jsonify, session
-from flask.helpers import url_for
+from flask import jsonify, session
+from flask.helpers import flash, url_for
 from flask_login import current_user, login_user, logout_user, UserMixin
 from flask_mail import Message
-from smtplib import SMTPException
 from werkzeug.security import check_password_hash, generate_password_hash
 
 import secrets
@@ -56,13 +55,21 @@ class User(UserMixin, db.Model):
 
     def register(self, notify:bool=False, password:str=None):
         self.generate_id()
-        users = User.query.all()
+        try: users = User.query.all()
+        except Exception as exception:
+            write('system.log', f'Database error when setting default dataset {self.id}: {exception}')
+            return False, f'Database error {exception}.'
         for user in users:
             if user.get_username() == self.get_username(): return False, f'Username {self.get_username()} already in use.'
             if user.get_email() == self.get_email(): return False, f'Email address {self.get_email()} already in use.'
         self.set_password(password=password)
-        db.session.add(self)
-        db.session.commit()
+        try:
+            db.session.add(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when registering user {self.get_username()}: {exception}')
+            return False, f'Database error: {exception}'
         write('users.log', f'User \'{self.get_username()}\' was created with id \'{self.id}\'.')
         if notify:
             email = Message(
@@ -91,10 +98,8 @@ class User(UserMixin, db.Model):
                 <p>SKA Refereeing</p>
                 """
             )
-            try:
-                mail.send(email)
-            except SMTPException as exception:
-                write('system.log', f'SMTP Error while trying to notify new user account creation to {self.get_username()} with error: {exception}')
+            try: mail.send(email)
+            except Exception as exception: write('system.log', f'SMTP Error while trying to notify new user account creation to {self.get_username()} with error: {exception}')
         return True, f'User {self.get_username()} was created successfully.'
 
     def login(self, remember:bool=False):
@@ -145,23 +150,36 @@ class User(UserMixin, db.Model):
             <p>SKA Refereeing</p>
             """
         )
-        try:
-            mail.send(email)
-        except SMTPException as exception:
+        try: mail.send(email)
+        except Exception as exception:
             write('system.log', f'SMTP Error while trying to reset password for {self.get_username()} with error: {exception}')
+            db.session.rollback()
             return jsonify({'error': f'SMTP Error: {exception}'}), 500
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when resetting password for user {self.get_username()}: {exception}')
+            return False, f'Database error: {exception}'
         return jsonify({'success': 'Your password reset link has been generated.'}), 200
 
     def clear_reset_tokens(self):
         self.reset_token = self.verification_token = None
-        db.session.commit()
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when resetting clearing reset tokens for user {self.get_username()}: {exception}')
+            return False, f'Database error: {exception}'
     
     def delete(self, notify:bool=False):
         username = self.get_username()
         email_address = self.get_email()
-        db.session.delete(self)
-        db.session.commit()
+        try:
+            db.session.delete(self)
+            db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when deleting user {self.get_username()}: {exception}')
+            return False, f'Database error: {exception}'
         message = f'User \'{username}\' was deleted by \'{current_user.get_username()}\'.'
         write('users.log', message)
         if notify:
@@ -186,10 +204,8 @@ class User(UserMixin, db.Model):
                 <p>SKA Refereeing</p>
                 """
             )
-            try:
-                mail.send(email)
-            except SMTPException as exception:
-                write('system.log', f'SMTP Error when trying to delete account {username} with error: {exception}')
+            try: mail.send(email)
+            except Exception as exception: write('system.log', f'SMTP Error when trying to delete account {username} with error: {exception}')
         return True, message
 
     def update(self, password:str=None, email:str=None, notify:bool=False):
@@ -197,11 +213,19 @@ class User(UserMixin, db.Model):
         if password: self.set_password(password)
         old_email = self.get_email()
         if email:
-            for entry in User.query.all():
-                if entry.get_email() == email and not entry == self: return False, f'The email address {email} is already in use.'
+            try:
+                for entry in User.query.all():
+                    if entry.get_email() == email and not entry == self: return False, f'The email address {email} is already in use.'
+            except Exception as exception:
+                write('system.log', f'Database error when setting default dataset {self.id}: {exception}')
+                return False, f'Database error {exception}.'
             self.set_email(email)
-        db.session.commit()
-        _current_user = current_user.get_username() if current_user.is_authenticated else 'anonymous'
+        try: db.session.commit()
+        except Exception as exception:
+            db.session.rollback()
+            write('system.log', f'Database error when updating user {self.get_username()}: {exception}')
+            return False, f'Database error: {exception}'
+        _current_user = 'command line' if not current_user else 'anonymous' if not current_user.is_authenticated else current_user.get_username()
         write('system.log', f'Information for user {self.get_username()} has been updated by {_current_user}.')
         if notify:
             message = Message(
@@ -230,8 +254,6 @@ class User(UserMixin, db.Model):
                 <p>SKA Refereeing</p>
                 """
             )
-            try:
-                mail.send(message)
-            except SMTPException as exception:
-                write('system.log', f'SMTP Error when trying to update account {self.get_username()} with error: {exception}')
+            try: mail.send(message)
+            except Exception as exception: write('system.log', f'SMTP Error when trying to update account {self.get_username()} with error: {exception}')
         return True, f'Account {self.get_username()} has been updated.'

ref-test/app/quiz/views.py

@@ -1,10 +1,11 @@
 from ..forms.quiz import StartQuiz
 from ..models import Entry, Test
 from ..tools.forms import send_errors_to_client
+from ..tools.logs import write
 from ..tools.test import redirect_if_started
 
-from flask import abort, Blueprint, jsonify, redirect, render_template, request, session
-from flask.helpers import flash, url_for
+from flask import Blueprint, jsonify, render_template, request, session
+from flask.helpers import abort, flash, redirect, url_for
 
 from datetime import datetime
 
@@ -37,7 +38,10 @@ def _start():
             entry.set_club(request.form.get('club'))
             entry.set_email(request.form.get('email'))
             code = request.form.get('test_code').replace('—', '').lower()
-            test = Test.query.filter_by(code=code).first()
+            try: test = Test.query.filter_by(code=code).first()
+            except Exception as exception:
+                write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+                return abort(500)
             entry.test = test
             entry.user_code = request.form.get('user_code')
             entry.user_code = None if entry.user_code == '' else entry.user_code.lower()
@@ -59,16 +63,23 @@ def _start():
 @quiz.route('/quiz/')
 def _quiz():
     id = session.get('id')
-    if not id or not Entry.query.filter_by(id=id).first():
-        flash('Your session was not recognised. Please sign in to the quiz again.', 'error')
-        session.pop('id', None)
-        return redirect(url_for('quiz._start'))
+    try:
+        if not id or not Entry.query.filter_by(id=id).first():
+            flash('Your session was not recognised. Please sign in to the quiz again.', 'error')
+            session.pop('id', None)
+            return redirect(url_for('quiz._start'))
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     return render_template('/quiz/client.html')
 
 @quiz.route('/result/')
 def _result():
     id = session.get('id')
-    entry = Entry.query.filter_by(id=id).first()
+    try: entry = Entry.query.filter_by(id=id).first()
+    except Exception as exception:
+        write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+        return abort(500)
     if not entry: return abort(404)
     session.pop('id',None)
     score = round(100*entry.result['score']/entry.result['max'])

ref-test/app/tools/auth.py

@@ -1,8 +1,8 @@
 from .data import load
 from ..models import User
+from ..tools.logs import write
 
-from flask import abort, redirect
-from flask.helpers import flash, url_for
+from flask.helpers import abort, flash, redirect, url_for
 from flask_login import current_user
 
 from functools import wraps
@@ -10,9 +10,13 @@ from functools import wraps
 def require_account_creation(function):
     @wraps(function)
     def wrapper(*args, **kwargs):
-        if User.query.count() == 0:
-            flash('Please register a user account.', 'alert')
-            return redirect(url_for('admin._register'))
+        try:
+            if User.query.count() == 0:
+                flash('Please register a user account.', 'alert')
+                return redirect(url_for('admin._register'))
+        except Exception as exception:
+            write('system.log', f'Database error when checking for existing accounts: {exception}')
+            return abort(500)
         return function(*args, **kwargs)
     return wrapper
 

ref-test/app/tools/data.py

@@ -1,8 +1,8 @@
 from ..models import Dataset
+from ..tools.logs import write
 
 from flask import current_app as app
-from flask import flash, redirect
-from flask.helpers import url_for
+from flask.helpers import abort, flash, redirect, url_for
 
 import json
 from pathlib import Path
@@ -76,7 +76,10 @@ def get_tag_list(dataset:list):
 def check_dataset_exists(function):
     @wraps(function)
     def wrapper(*args, **kwargs):
-        datasets = Dataset.query.all()
+        try: datasets = Dataset.query.all()
+        except Exception as exception:
+            write('system.log', f'Database error when checking existing datasets: {exception}')
+            return abort(500)
         if not datasets:
             flash('There are no available question datasets. Please upload a question dataset first, or use the question editor to create a new dataset.', 'error')
             return redirect(url_for('admin._questions'))

ref-test/app/tools/forms.py

@@ -1,30 +1,10 @@
 
 from ..extensions import db
+from ..tools.logs import write
 
 from flask import jsonify
 from wtforms.validators import ValidationError
 
-import json
-from sqlalchemy.ext import mutable
-
-class JsonEncodedDict(db.TypeDecorator):
-    """Enables JSON storage by encoding and decoding on the fly."""
-    impl = db.Text
-
-    def process_bind_param(self, value, dialect):
-        if value is None:
-            return '{}'
-        else:
-            return json.dumps(value)
-
-    def process_result_value(self, value, dialect):
-        if value is None:
-            return {}
-        else:
-            return json.loads(value)
-
-mutable.MutableDict.associate_with(JsonEncodedDict)
-
 def value(min:int=0, max:int=None):
     if not max:
         message = f'Value must be greater than {min}.'
@@ -47,7 +27,10 @@ def get_time_options():
 
 def get_dataset_choices():
     from ..models import Dataset
-    datasets = Dataset.query.all()
+    try: datasets = Dataset.query.all()
+    except Exception as exception:
+        write('system.log', f'Database error when fetching dataset lists: {exception}')
+        return []
     dataset_choices = []
     for dataset in datasets:
         label = dataset.get_name()

ref-test/app/tools/test.py

@@ -1,8 +1,9 @@
 from .data import randomise_list
 from ..models import Entry
+from ..tools.logs import write
 
-from flask import redirect, request, session
-from flask.helpers import url_for
+from flask import request, session
+from flask.helpers import abort, redirect, url_for
 
 from functools import wraps
 
@@ -129,8 +130,11 @@ def redirect_if_started(function):
     @wraps(function)
     def wrapper(*args, **kwargs):
         id = session.get('id')
-        if request.method == 'GET' and id and Entry.query.filter_by(id=id).first():
-            return redirect(url_for('quiz._quiz'))
+        try:
+            if request.method == 'GET' and id and Entry.query.filter_by(id=id).first(): return redirect(url_for('quiz._quiz'))
+        except Exception as exception:
+            write('system.log', f'Database error when checking if test has been started: {exception}')
+            return abort(500)
         return function(*args, **kwargs)
     return wrapper
 

ref-test/app/view/views.py

@@ -2,9 +2,10 @@ from ..forms.admin import EditDataset
 from ..models import Dataset, User
 from ..tools.forms import get_dataset_choices, send_errors_to_client
 from ..tools.data import check_dataset_exists
+from ..tools.logs import write
 
-from flask import Blueprint, flash, jsonify, redirect, render_template, request
-from flask.helpers import url_for
+from flask import Blueprint, jsonify, render_template, request
+from flask.helpers import abort, flash, redirect, url_for
 from flask_login import login_required
 
 view = Blueprint(
@@ -32,9 +33,13 @@ def _view():
 @login_required
 @check_dataset_exists
 def _view_console(id:str=None):
-    dataset = Dataset.query.filter_by(id=id).first()
-    datasets = Dataset.query.count()
-    users = User.query.all()
+    try:
+        dataset = Dataset.query.filter_by(id=id).first()
+        datasets = Dataset.query.count()
+        users = User.query.all()
+    except Exception as exception:
+            write('system.log', f'Database error when processing request \'{request.url}\': {exception}')
+            return abort(500)
     if not dataset:
         flash('Invalid dataset ID.', 'error')
         return redirect(url_for('admin._questions'))

ref-test/install.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 from main import app
 from app.extensions import db
+from app.models import *
 from app.tools.data import save
 from app.tools.logs import write
 from sqlalchemy_utils import create_database, database_exists
@@ -21,14 +22,14 @@ with app.app_context():
     if not path.isfile(f'./{data}/logs/users.log'): write('users.log', 'Log file created.')
     if not path.isfile(f'./{data}/logs/system.log'): write('system.log', 'Log file created.')
     if not path.isfile(f'./{data}/logs/tests.log'): write('tests.log', 'Log file created.')
-    if not database_exists(database_uri):
-        create_database(database_uri)
-        write('system.log', 'No database found. Creating a new database.')
-        from app.models import *
-        db.create_all()
-        write('system.log', 'Creating database schema.')
     if not path.isfile(f'./{data}/.encryption.key'):
         write('system.log', 'No encryption key found. Generating new encryption key.')
         with open(f'./{data}/.encryption.key', 'wb') as key_file:
             key = Fernet.generate_key()
             key_file.write(key)
+
+    """Create File for SQLite Database"""
+    if database_uri[0:6].lower() == 'sqlite':
+        if not database_exists(database_uri):
+            create_database(database_uri)
+            write('system.log', 'No SQLite file found. Creating a new database.')

ref-test/requirements.txt

@@ -18,9 +18,11 @@ itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.1
 pycparser==2.21
+PyMySQL==1.0.2
 python-dotenv==0.20.0
 six==1.16.0
 SQLAlchemy==1.4.40
+sqlalchemy-json==0.5.0
 SQLAlchemy-Utils==0.38.3
 visitor==0.1.3
 Werkzeug==2.2.2

ref-test/reset.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+from main import app
+from app.models import User
+
+import sys
+from getpass import getpass
+
+with app.app_context():
+    try: users = User.query.all()
+    except Exception as exception: sys.exit('Database error:', exception)
+    print('')
+    print('This interface will allow you to override the password for an administrator account.')
+    print('To exit this interface, press Ctrl + C.')
+    print('')
+    while True:
+        username = input('Username: ')
+        user = None
+        for _user in users:
+            if _user.get_username() == username:
+                user = _user
+                break
+        if not user:
+            print(f'Error: User \'{username}\' does not exist.')
+            continue
+        else: break
+    while True:
+        email = input('Email address: ')
+        if not email == user.get_email():
+            print(f'Error: Incorrect email address for user \'{username}\'.')
+            continue
+        else: break
+    print('')
+    print('Authenticated using username and email address.')
+    print('Update the password for the account below.')
+    print('')
+    while True:
+        password = getpass('Enter password: ')
+        if len(password) < 6 or len(password) > 20:
+            print(f'Error: Password must be between 6 and 20 characters long.')
+        reenter_password = getpass('Reenter password: ')
+        if not password == reenter_password:
+            print(f'Error: Entered passwords do not match.')
+            continue
+        else: break
+    success, message = user.update(password=password)
+    if not success:
+        sys.exit(message)
+    print('')
+    print(f'Success: Password for user \'{username}\' has been updated.')