breaking: remove the config option to automatically close tabs after ean purchase

fix: improve error handling on database consistency errors (e.g. non-unique ean codes) in the settings
feat: handle ean codes in the already open tab via a websocket connection
feat: populate ean code input field when a barcode is scanned while in the product settings

.forgejo/workflows/package.yml

@@ -0,0 +1,52 @@
+---
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+
+  build_wheel:
+    runs-on: docker
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - name: Build Python wheel
+        run: |
+          apt update; apt install -y python3-pip
+          pip3 install --break-system-packages -e .[test]
+          python3 setup.py egg_info bdist_wheel
+      - uses: https://git.kabelsalat.ch/s3lph/forgejo-action-wheel-package-upload@v3
+        with:
+          username: ${{ secrets.API_USERNAME }}
+          password: ${{ secrets.API_PASSWORD }}
+
+  build_debian:
+    runs-on: docker
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - name: Prepare package
+        run: |
+          # The Python package name provided by the python3-magic Debian package is "python-magic" rather than "file-magic".
+          sed -re 's/file-magic/python-magic/' -i setup.py
+          cp -r static/ package/debian/matemat/usr/lib/matemat/static/
+          cp -r templates/ package/debian/matemat/usr/lib/matemat/templates/
+          mkdir -p package/debian/matemat/var/lib/matemat/themes/
+          cp -r themes/ package/debian/matemat/usr/lib/matemat/themes/
+          
+      - uses: https://git.kabelsalat.ch/s3lph/forgejo-action-python-debian-package@v5
+        with:
+          python_module: matemat
+          package_name: matemat
+          package_root: package/debian/matemat
+          package_output_path: package/debian
+          pre_package_hook: |
+            mv matemat/usr/bin/matemat matemat/usr/lib/matemat/matemat
+            rm -rf matemat/usr/bin
+            chmod +x matemat/usr/lib/matemat/matemat
+
+      - uses: https://git.kabelsalat.ch/s3lph/forgejo-action-debian-package-upload@v2
+        with:
+          username: ${{ secrets.API_USERNAME }}
+          password: ${{ secrets.API_PASSWORD }}
+          deb: "package/debian/*.deb"

.forgejo/workflows/test.yml

@@ -0,0 +1,27 @@
+---
+
+on: push
+
+jobs:
+
+  test:
+    runs-on: docker
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - name: test
+        run: |
+          apt update; apt install --yes python3-pip
+          pip3 install --break-system-packages -e .[test]
+          python3 -m coverage run --rcfile=setup.cfg -m unittest discover matemat
+          python3 -m coverage combine
+          python3 -m coverage report --rcfile=setup.cfg
+
+  codestyle:
+    runs-on: docker
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - name: codestyle
+        run: |
+          apt update; apt install --yes python3-pip
+          pip3 install --break-system-packages -e .[test]
+          pycodestyle matemat

.woodpecker.yml

@@ -1,91 +0,0 @@
----
-
-steps:
-
-  test:
-    image: python:3.11-bookworm
-    group: test
-    commands:
-      - pip3 install -e .[test]
-      - python3 -m coverage run --rcfile=setup.cfg -m unittest discover matemat
-      - python3 -m coverage combine
-      - python3 -m coverage report --rcfile=setup.cfg
-
-  codestyle:
-    image: python:3.11-bookworm
-    group: test
-    commands:
-      - pip3 install -e .[test]
-      - pycodestyle matemat
-
-  build_wheel:
-    image: python:3.11-bookworm
-    group: package
-    when:
-      - event: tag
-    secrets:
-      - GITEA_API_REPOSITORY_PYPI
-      - GITEA_API_USERNAME
-      - GITEA_API_PASSWORD
-    commands:
-      - pip3 install -e .[test]
-      - python3 setup.py egg_info bdist_wheel
-      - |
-        cat > ~/.pypirc <<EOF
-        [distutils]
-        index-servers = gitea
-
-        [gitea]
-        repository = $${GITEA_API_REPOSITORY_PYPI}
-        username = $${GITEA_API_USERNAME}
-        password = $${GITEA_API_PASSWORD}
-        EOF
-      - python3 -m twine upload --repository gitea dist/*.whl
-      
-  build_debian:
-    image: python:3.11-bookworm
-    group: package
-    when:
-      - event: tag
-    secrets:
-      - GITEA_API_REPOSITORY_DEB
-      - GITEA_API_USERNAME
-      - GITEA_API_PASSWORD
-    commands:
-      - apt update; apt install -y lintian rsync sudo curl
-      - export MATEMAT_VERSION=$(python -c 'import matemat; print(matemat.__version__)')
-      # The Python package name provided by the python3-magic Debian package is "python-magic" rather than "file-magic".
-      - sed -re 's/file-magic/python-magic/' -i setup.py
-      - |
-        (for version in "$(cat CHANGELOG.md | grep '<!-- BEGIN CHANGES' | cut -d ' ' -f 4)"; do
-          echo "matemat ($${version}-1) stable; urgency=medium\n"
-          cat CHANGELOG.md | grep -A 1000 "<"'!'"-- BEGIN CHANGES $${version} -->" | grep -B 1000 "<"'!'"-- END CHANGES $${version} -->" | tail -n +2 | head -n -1 | sed -re 's/^-/  */g'
-          echo "\n -- s3lph@kabelsalat.ch  $(date -R)\n"
-        done) > package/debian/matemat/usr/share/doc/matemat/changelog
-      - gzip -9n package/debian/matemat/usr/share/doc/matemat/changelog
-      - cp -r static/ package/debian/matemat/usr/lib/matemat/static/
-      - cp -r templates/ package/debian/matemat/usr/lib/matemat/templates/
-      - mkdir -p package/debian/matemat/var/lib/matemat/themes/
-      - cp -r themes/ package/debian/matemat/usr/lib/matemat/themes/
-      - python3 setup.py egg_info install --root=package/debian/matemat/ --prefix=/usr --optimize=1
-      - cd package/debian
-      - mkdir -p matemat/usr/lib/python3/dist-packages/
-      - rsync -a matemat/usr/lib/python3.11/site-packages/ matemat/usr/lib/python3/dist-packages/
-      - rm -rf matemat/usr/lib/python3.11/
-      - find matemat/usr/lib/python3/dist-packages -name __pycache__ -exec rm -r {} \; 2>/dev/null || true
-      - find matemat/usr/lib/python3/dist-packages -name '*.pyc' -exec rm {} \;
-      - mv matemat/usr/bin/matemat matemat/usr/lib/matemat/matemat
-      - rm -rf matemat/usr/bin
-      - sed -re 's$#!/usr/local/bin/python3$#!/usr/bin/python3$' -i matemat/usr/lib/matemat/matemat
-      - find matemat -type f -exec chmod 0644 {} \;
-      - find matemat -type d -exec chmod 755 {} \;
-      - chmod +x matemat/usr/lib/matemat/matemat matemat/DEBIAN/postinst matemat/DEBIAN/prerm matemat/DEBIAN/postrm
-      - sed -re "s/__VERSION__/$${MATEMAT_VERSION}-1/g" -i matemat/DEBIAN/control
-      - dpkg-deb --build matemat
-      - mv matemat.deb "matemat_$${MATEMAT_VERSION}-1_all.deb"
-      - sudo -u nobody lintian "matemat_$${MATEMAT_VERSION}-1_all.deb" || true
-      - >-
-        curl
-        --user "$${GITEA_API_USERNAME}:$${GITEA_API_PASSWORD}"
-        --upload-file "matemat_$${EXPORTER_VERSION}-1_all.deb"
-        $${GITEA_API_REPOSITORY_DEB}

CHANGELOG.md

@@ -1,5 +1,117 @@
 # Matemat Changelog
 
+<!-- BEGIN RELEASE v0.3.15 -->
+## Version 0.3.15
+
+Websocket-based EAN code handling
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.15 -->
+- breaking: remove the config option to automatically close tabs after ean purchase
+- fix: improve error handling on database consistency errors (e.g. non-unique ean codes) in the settings
+- feat: handle ean codes in the already open tab via a websocket connection
+- feat: populate ean code input field when a barcode is scanned while in the product settings
+<!-- END CHANGES 0.3.15 -->
+
+<!-- END RELEASE v0.3.15 -->
+
+<!-- BEGIN RELEASE v0.3.14 -->
+## Version 0.3.14
+
+Improvement of quick-purchase via EAN codes
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.14 -->
+- fix: show the purchase warning banner also on the touchkey login
+- feat: replace overlay system with a generic notification banner system
+- feat: add a config option to automatically close tabs after ean purchase
+<!-- END CHANGES 0.3.14 -->
+
+<!-- END RELEASE v0.3.14 -->
+
+<!-- BEGIN RELEASE v0.3.13 -->
+## Version 0.3.13
+
+Quick-purchase via EAN codes
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.13 -->
+- feat: Immediately purchase a product by calling `/?ean=...`
+- chore: Replace datetime.utcnow with datetime.now(UTC)
+- chore: Replace sqlite3 qmark-bindings with named bindings
+<!-- END CHANGES 0.3.13 -->
+
+<!-- END RELEASE v0.3.13 -->
+
+<!-- BEGIN RELEASE v0.3.12 -->
+## Version 0.3.12
+
+Sort products
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.12 -->
+- Sort products in the list
+<!-- END CHANGES 0.3.12 -->
+
+<!-- END RELEASE v0.3.12 -->
+
+<!-- BEGIN RELEASE v0.3.11 -->
+## Version 0.3.11
+
+Improve auto-logout
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.11 -->
+- Show purchase overlay after logout
+- Fix state of auto-logout checkbox after changing user settings
+<!-- END CHANGES 0.3.11 -->
+
+<!-- END RELEASE v0.3.11 -->
+
+<!-- BEGIN RELEASE v0.3.10 -->
+## Version 0.3.10
+
+Add option to log out users automatically after completing a purchase
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.10 -->
+- Add option to log out users automatically after completing a purchase
+<!-- END CHANGES 0.3.10 -->
+
+<!-- END RELEASE v0.3.10 -->
+
+<!-- BEGIN RELEASE v0.3.9 -->
+## Version 0.3.9
+
+Improve UX on small touchscreens
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.9 -->
+- Improve link sizes for touchscreens
+<!-- END CHANGES 0.3.9 -->
+
+<!-- END RELEASE v0.3.9 -->
+
+<!-- BEGIN RELEASE v0.3.8 -->
+## Version 0.3.8
+
+Migrate from Woodpecker CI to Forgejo Actions
+
+### Changes
+
+<!-- BEGIN CHANGES 0.3.8 -->
+- Migrate from Woodpecker CI to Forgejo Actions
+<!-- END CHANGES 0.3.8 -->
+
+<!-- END RELEASE v0.3.8 -->
+
 <!-- BEGIN RELEASE v0.3.7 -->
 ## Version 0.3.7
 

README.md

@@ -1,7 +1,5 @@
 # Matemat
 
-[![status-badge](https://woodpecker.kabelsalat.ch/api/badges/80/status.svg)](https://woodpecker.kabelsalat.ch/repos/80)
-
 A web service for automated stock-keeping of a soda machine written in Python.
 It provides a touch-input-friendly user interface (as most input happens through the
 soda machine's touch screen).

matemat/__init__.py

@@ -1,2 +1,2 @@
 
-__version__ = '0.3.7'
+__version__ = '0.3.15'

matemat/db/facade.py

@@ -3,7 +3,7 @@ from typing import Any, Dict, List, Optional, Tuple, Type
 
 import crypt
 from hmac import compare_digest
-from datetime import datetime
+from datetime import datetime, UTC
 
 from matemat.db.primitives import User, Product, ReceiptPreference, Receipt, \
     Transaction, Consumption, Deposit, Modification
@@ -84,7 +84,7 @@ class MatematDatabase(object):
         users: List[User] = []
         with self.db.transaction(exclusive=False) as c:
             for row in c.execute('''
-                SELECT user_id, username, email, is_admin, is_member, balance, receipt_pref
+                SELECT user_id, username, email, is_admin, is_member, balance, receipt_pref, logout_after_purchase
                 FROM users
                 WHERE touchkey IS NOT NULL OR NOT :must_have_touchkey
                 ORDER BY username COLLATE NOCASE ASC
@@ -92,12 +92,13 @@ class MatematDatabase(object):
                 'must_have_touchkey': with_touchkey
             }):
                 # Decompose each row and put the values into a User object
-                user_id, username, email, is_admin, is_member, balance, receipt_p = row
+                user_id, username, email, is_admin, is_member, balance, receipt_p, logout_after_purchase = row
                 try:
                     receipt_pref: ReceiptPreference = ReceiptPreference(receipt_p)
                 except ValueError:
                     raise DatabaseConsistencyError(f'{receipt_p} is not a valid ReceiptPreference')
-                users.append(User(user_id, username, balance, email, is_admin, is_member, receipt_pref))
+                users.append(User(user_id, username, balance, email, is_admin, is_member, receipt_pref,
+                                  logout_after_purchase))
         return users
 
     def get_user(self, uid: int) -> User:
@@ -108,28 +109,28 @@ class MatematDatabase(object):
         with self.db.transaction(exclusive=False) as c:
             # Fetch all values to construct the user
             c.execute('''
-                SELECT user_id, username, email, is_admin, is_member, balance, receipt_pref
+                SELECT user_id, username, email, is_admin, is_member, balance, receipt_pref, logout_after_purchase
                 FROM users
-                WHERE user_id = ?
-                ''',
-                      [uid])
+                WHERE user_id = :user_id
+                ''', {'user_id': uid})
             row = c.fetchone()
             if row is None:
                 raise ValueError(f'No user with user ID {uid} exists.')
             # Unpack the row and construct the user
-            user_id, username, email, is_admin, is_member, balance, receipt_p = row
+            user_id, username, email, is_admin, is_member, balance, receipt_p, logout_after_purchase = row
             try:
                 receipt_pref: ReceiptPreference = ReceiptPreference(receipt_p)
             except ValueError:
                 raise DatabaseConsistencyError(f'{receipt_p} is not a valid ReceiptPreference')
-            return User(user_id, username, balance, email, is_admin, is_member, receipt_pref)
+            return User(user_id, username, balance, email, is_admin, is_member, receipt_pref, logout_after_purchase)
 
     def create_user(self,
                     username: str,
                     password: str,
                     email: Optional[str] = None,
                     admin: bool = False,
-                    member: bool = True) -> User:
+                    member: bool = True,
+                    logout_after_purchase: bool = False) -> User:
         """
         Create a new user.
         :param username: The name of the new user.
@@ -137,6 +138,7 @@ class MatematDatabase(object):
         :param email: The user's email address, defaults to None.
         :param admin: Whether the user is an administrator, defaults to False.
         :param member: Whether the user is a member, defaults to True.
+        :param logout_after_purchase: Whether the user should be logged out after completing a purchase.
         :return: A User object representing the created user.
         :raises ValueError: If a user with the same name already exists.
         """
@@ -145,19 +147,22 @@ class MatematDatabase(object):
         user_id: int = -1
         with self.db.transaction() as c:
             # Look up whether a user with the same name already exists.
-            c.execute('SELECT user_id FROM users WHERE username = ?', [username])
+            c.execute('SELECT user_id FROM users WHERE username = :username', {'username': username})
             if c.fetchone() is not None:
                 raise ValueError(f'A user with the name \'{username}\' already exists.')
             # Insert the user into the database.
             c.execute('''
-              INSERT INTO users (username, email, password, balance, is_admin, is_member, lastchange, created)
-              VALUES (:username, :email, :pwhash, 0, :admin, :member, STRFTIME('%s', 'now'), STRFTIME('%s', 'now'))
+              INSERT INTO users (username, email, password, balance, is_admin, is_member, lastchange, created,
+                  logout_after_purchase)
+              VALUES (:username, :email, :pwhash, 0, :admin, :member, STRFTIME('%s', 'now'), STRFTIME('%s', 'now'),
+                  :logout_after_purchase)
             ''', {
                 'username': username,
                 'email': email,
                 'pwhash': pwhash,
                 'admin': admin,
-                'member': member
+                'member': member,
+                'logout_after_purchase': logout_after_purchase
             })
             # Fetch the new user's rowid.
             c.execute('SELECT last_insert_rowid()')
@@ -179,14 +184,15 @@ class MatematDatabase(object):
             raise ValueError('Exactly one of password and touchkey must be provided')
         with self.db.transaction(exclusive=False) as c:
             c.execute('''
-              SELECT user_id, username, email, password, touchkey, is_admin, is_member, balance, receipt_pref
+              SELECT user_id, username, email, password, touchkey, is_admin, is_member, balance, receipt_pref,
+                logout_after_purchase
               FROM users
-              WHERE username = ?
-              ''', [username])
+              WHERE username = :username
+              ''', {'username': username})
             row = c.fetchone()
             if row is None:
                 raise AuthenticationError('User does not exist')
-            user_id, username, email, pwhash, tkhash, admin, member, balance, receipt_p = row
+            user_id, username, email, pwhash, tkhash, admin, member, balance, receipt_p, logout_after_purchase = row
             if password is not None and not compare_digest(crypt.crypt(password, pwhash), pwhash):
                 raise AuthenticationError('Password mismatch')
             elif touchkey is not None \
@@ -199,7 +205,7 @@ class MatematDatabase(object):
                 receipt_pref: ReceiptPreference = ReceiptPreference(receipt_p)
             except ValueError:
                 raise DatabaseConsistencyError(f'{receipt_p} is not a valid ReceiptPreference')
-            return User(user_id, username, balance, email, admin, member, receipt_pref)
+            return User(user_id, username, balance, email, admin, member, receipt_pref, logout_after_purchase)
 
     def change_password(self, user: User, oldpass: str, newpass: str, verify_password: bool = True) -> None:
         """
@@ -214,8 +220,8 @@ class MatematDatabase(object):
         with self.db.transaction() as c:
             # Fetch the old password.
             c.execute('''
-            SELECT password FROM users WHERE user_id = ?
-            ''', [user.id])
+            SELECT password FROM users WHERE user_id = :user_id
+            ''', {'user_id': user.id})
             row = c.fetchone()
             if row is None:
                 raise AuthenticationError('User does not exist in database.')
@@ -244,8 +250,8 @@ class MatematDatabase(object):
         with self.db.transaction() as c:
             # Fetch the password.
             c.execute('''
-            SELECT password FROM users WHERE user_id = ?
-            ''', [user.id])
+            SELECT password FROM users WHERE user_id = :user_id
+            ''', {'user_id': user.id})
             row = c.fetchone()
             if row is None:
                 raise AuthenticationError('User does not exist in database.')
@@ -280,6 +286,8 @@ class MatematDatabase(object):
         balance: int = kwargs['balance'] if 'balance' in kwargs else user.balance
         balance_reason: Optional[str] = kwargs['balance_reason'] if 'balance_reason' in kwargs else None
         receipt_pref: ReceiptPreference = kwargs['receipt_pref'] if 'receipt_pref' in kwargs else user.receipt_pref
+        logout_after_purchase: bool = \
+            kwargs['logout_after_purchase'] if 'logout_after_purchase' in kwargs else user.logout_after_purchase
         with self.db.transaction() as c:
             c.execute('SELECT balance FROM users WHERE user_id = :user_id', {'user_id': user.id})
             row = c.fetchone()
@@ -312,7 +320,8 @@ class MatematDatabase(object):
               is_admin = :is_admin,
               is_member = :is_member,
               receipt_pref = :receipt_pref,
-              lastchange = STRFTIME('%s', 'now')
+              lastchange = STRFTIME('%s', 'now'),
+              logout_after_purchase = :logout_after_purchase
             WHERE user_id = :user_id
             ''', {
                 'user_id': user.id,
@@ -321,7 +330,8 @@ class MatematDatabase(object):
                 'balance': balance,
                 'is_admin': is_admin,
                 'is_member': is_member,
-                'receipt_pref': receipt_pref.value
+                'receipt_pref': receipt_pref.value,
+                'logout_after_purchase': logout_after_purchase
             })
         # Only update the actual user object after the changes in the database succeeded
         user.name = name
@@ -329,6 +339,7 @@ class MatematDatabase(object):
         user.balance = balance
         user.is_admin = is_admin
         user.is_member = is_member
+        user.logout_after_purchase = logout_after_purchase
         user.receipt_pref = receipt_pref
 
     def delete_user(self, user: User) -> None:
@@ -340,8 +351,8 @@ class MatematDatabase(object):
         with self.db.transaction() as c:
             c.execute('''
             DELETE FROM users
-            WHERE user_id = ?
-            ''', [user.id])
+            WHERE user_id = :user_id
+            ''', {'user_id': user.id})
             affected = c.execute('SELECT changes()').fetchone()[0]
             if affected != 1:
                 raise DatabaseConsistencyError(
@@ -355,34 +366,52 @@ class MatematDatabase(object):
         products: List[Product] = []
         with self.db.transaction(exclusive=False) as c:
             for row in c.execute('''
-                SELECT product_id, name, price_member, price_non_member, custom_price, stock, stockable
-                FROM products
+                SELECT product_id, name, price_member, price_non_member, custom_price, stock, stockable, ean
+                FROM products ORDER BY name
               '''):
-                product_id, name, price_member, price_external, custom_price, stock, stockable = row
-                products.append(Product(product_id, name, price_member, price_external, custom_price, stockable, stock))
+                product_id, name, price_member, price_external, custom_price, stock, stockable, ean = row
+                products.append(
+                    Product(product_id, name, price_member, price_external, custom_price, stockable, stock, ean))
         return products
 
     def get_product(self, pid: int) -> Product:
         """
         Return a product identified by its product ID.
-        :param pid: The products's ID.
+        :param pid: The product's ID.
         """
         with self.db.transaction(exclusive=False) as c:
             # Fetch all values to construct the product
             c.execute('''
-                SELECT product_id, name, price_member, price_non_member, custom_price, stock, stockable
+                SELECT product_id, name, price_member, price_non_member, custom_price, stock, stockable, ean
                 FROM products
-                WHERE product_id = ?''',
-                      [pid])
+                WHERE product_id = :product_id''', {'product_id': pid})
             row = c.fetchone()
             if row is None:
                 raise ValueError(f'No product with product ID {pid} exists.')
             # Unpack the row and construct the product
-            product_id, name, price_member, price_non_member, custom_price, stock, stockable = row
-            return Product(product_id, name, price_member, price_non_member, custom_price, stockable, stock)
+            product_id, name, price_member, price_non_member, custom_price, stock, stockable, ean = row
+            return Product(product_id, name, price_member, price_non_member, custom_price, stockable, stock, ean)
+
+    def get_product_by_ean(self, ean: str) -> Product:
+        """
+        Return a product identified by its EAN code.
+        :param ean: The product's EAN code.
+        """
+        with self.db.transaction(exclusive=False) as c:
+            # Fetch all values to construct the product
+            c.execute('''
+                SELECT product_id, name, price_member, price_non_member, custom_price, stock, stockable, ean
+                FROM products
+                WHERE ean = :ean''', {'ean': ean})
+            row = c.fetchone()
+            if row is None:
+                raise ValueError(f'No product with EAN code {ean} exists.')
+            # Unpack the row and construct the product
+            product_id, name, price_member, price_non_member, custom_price, stock, stockable, ean = row
+            return Product(product_id, name, price_member, price_non_member, custom_price, stockable, stock, ean)
 
     def create_product(self, name: str, price_member: int, price_non_member: int, custom_price:
-                       bool, stockable: bool) -> Product:
+                       bool, stockable: bool, ean: str) -> Product:
         """
         Creates a new product.
         :param name: Name of the product.
@@ -395,22 +424,23 @@ class MatematDatabase(object):
         """
         product_id: int = -1
         with self.db.transaction() as c:
-            c.execute('SELECT product_id FROM products WHERE name = ?', [name])
+            c.execute('SELECT product_id FROM products WHERE name = :name', {'name': name})
             if c.fetchone() is not None:
                 raise ValueError(f'A product with the name \'{name}\' already exists.')
             c.execute('''
-              INSERT INTO products (name, price_member, price_non_member, custom_price, stock, stockable)
-              VALUES (:name, :price_member, :price_non_member, :custom_price, 0, :stockable)
+              INSERT INTO products (name, price_member, price_non_member, custom_price, stock, stockable, ean)
+              VALUES (:name, :price_member, :price_non_member, :custom_price, 0, :stockable, :ean)
             ''', {
                 'name': name,
                 'price_member': price_member,
                 'price_non_member': price_non_member,
                 'custom_price': custom_price,
-                'stockable': stockable
+                'stockable': stockable,
+                'ean': ean,
             })
             c.execute('SELECT last_insert_rowid()')
             product_id = int(c.fetchone()[0])
-        return Product(product_id, name, price_member, price_non_member, custom_price, stockable, 0)
+        return Product(product_id, name, price_member, price_non_member, custom_price, stockable, 0, ean)
 
     def change_product(self, product: Product, **kwargs) -> None:
         """
@@ -429,6 +459,7 @@ class MatematDatabase(object):
         custom_price: int = kwargs['custom_price'] if 'custom_price' in kwargs else product.custom_price
         stock: int = kwargs['stock'] if 'stock' in kwargs else product.stock
         stockable: bool = kwargs['stockable'] if 'stockable' in kwargs else product.stockable
+        ean: str = kwargs['ean'] if 'ean' in kwargs else product.ean
         with self.db.transaction() as c:
             c.execute('''
             UPDATE products
@@ -438,7 +469,8 @@ class MatematDatabase(object):
               price_non_member = :price_non_member,
               custom_price = :custom_price,
               stock = :stock,
-              stockable = :stockable
+              stockable = :stockable,
+              ean = :ean
             WHERE product_id = :product_id
             ''', {
                 'product_id': product.id,
@@ -447,7 +479,8 @@ class MatematDatabase(object):
                 'price_non_member': price_non_member,
                 'custom_price': custom_price,
                 'stock': stock,
-                'stockable': stockable
+                'stockable': stockable,
+                'ean': ean
             })
             affected = c.execute('SELECT changes()').fetchone()[0]
             if affected != 1:
@@ -460,6 +493,7 @@ class MatematDatabase(object):
         product.custom_price = custom_price
         product.stock = stock
         product.stockable = stockable
+        product.ean = ean
 
     def delete_product(self, product: Product) -> None:
         """
@@ -470,8 +504,8 @@ class MatematDatabase(object):
         with self.db.transaction() as c:
             c.execute('''
             DELETE FROM products
-            WHERE product_id = ?
-            ''', [product.id])
+            WHERE product_id = :product_id
+            ''', {'product_id': product.id})
             affected = c.execute('SELECT changes()').fetchone()[0]
             if affected != 1:
                 raise DatabaseConsistencyError(
@@ -531,8 +565,7 @@ class MatematDatabase(object):
         if amount < 0:
             raise ValueError('Cannot deposit a negative value')
         with self.db.transaction() as c:
-            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''',
-                      [user.id])
+            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''', {'user_id': user.id})
             row = c.fetchone()
             if row is None:
                 raise DatabaseConsistencyError(f'No such user: {user.id}')
@@ -576,8 +609,7 @@ class MatematDatabase(object):
             raise ValueError('Cannot transfer a negative value')
         with self.db.transaction() as c:
             # First, remove amount from the source user's account
-            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''',
-                      [source.id])
+            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''', {'user_id': source.id})
             row = c.fetchone()
             if row is None:
                 raise DatabaseConsistencyError(f'No such user: {source.id}')
@@ -609,8 +641,7 @@ class MatematDatabase(object):
             if affected != 1:
                 raise DatabaseConsistencyError(f'transfer should affect 1 users row, but affected {affected}')
             # Then, add the amount to the destination user's account
-            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''',
-                      [dest.id])
+            c.execute('''SELECT balance FROM users WHERE user_id = :user_id''', {'user_id': dest.id})
             row = c.fetchone()
             if row is None:
                 raise DatabaseConsistencyError(f'No such user: {dest.id}')
@@ -657,11 +688,11 @@ class MatematDatabase(object):
             LEFT JOIN receipts AS r
               ON r.user_id = u.user_id
             WHERE u.user_id = :user_id
-            ''', [user.id])
+            ''', {'user_id': user.id})
 
-        last_receipt: datetime = datetime.fromtimestamp(c.fetchone()[0])
+        last_receipt: datetime = datetime.fromtimestamp(c.fetchone()[0], UTC)
         next_receipt_due: datetime = user.receipt_pref.next_receipt_due(last_receipt)
-        return datetime.utcnow() > next_receipt_due
+        return datetime.now(UTC) > next_receipt_due
 
     def create_receipt(self, user: User, write: bool = False) -> Receipt:
         transactions: List[Transaction] = []
@@ -672,12 +703,12 @@ class MatematDatabase(object):
             LEFT JOIN receipts AS r
               ON r.user_id = u.user_id
             WHERE u.user_id = :user_id
-            ''', [user.id])
+            ''', {'user_id': user.id})
             row = cursor.fetchone()
             if row is None:
                 raise DatabaseConsistencyError(f'No such user: {user.id}')
             fromdate, min_id = row
-            created: datetime = datetime.fromtimestamp(fromdate)
+            created: datetime = datetime.fromtimestamp(fromdate, UTC)
             cursor.execute('''
             SELECT
               t.ta_id, t.value, t.old_balance, COALESCE(t.date, 0),
@@ -700,13 +731,15 @@ class MatematDatabase(object):
             for row in rows:
                 ta_id, value, old_balance, date, c, d, m, c_prod, m_agent, m_reason = row
                 if c == ta_id:
-                    t: Transaction = Consumption(ta_id, user, value, old_balance, datetime.fromtimestamp(date), c_prod)
+                    t: Transaction = Consumption(ta_id, user, value, old_balance,
+                                                 datetime.fromtimestamp(date, UTC), c_prod)
                 elif d == ta_id:
-                    t = Deposit(ta_id, user, value, old_balance, datetime.fromtimestamp(date))
+                    t = Deposit(ta_id, user, value, old_balance, datetime.fromtimestamp(date, UTC))
                 elif m == ta_id:
-                    t = Modification(ta_id, user, value, old_balance, datetime.fromtimestamp(date), m_agent, m_reason)
+                    t = Modification(ta_id, user, value, old_balance,
+                                     datetime.fromtimestamp(date, UTC), m_agent, m_reason)
                 else:
-                    t = Transaction(ta_id, user, value, old_balance, datetime.fromtimestamp(date))
+                    t = Transaction(ta_id, user, value, old_balance, datetime.fromtimestamp(date, UTC))
                 transactions.append(t)
             if write:
                 cursor.execute('''
@@ -721,7 +754,7 @@ class MatematDatabase(object):
                 receipt_id: int = int(cursor.fetchone()[0])
             else:
                 receipt_id = -1
-        receipt = Receipt(receipt_id, transactions, user, created, datetime.utcnow())
+        receipt = Receipt(receipt_id, transactions, user, created, datetime.now(UTC))
         return receipt
 
     def generate_sales_statistics(self, from_date: datetime, to_date: datetime) -> Dict[str, Any]:
@@ -763,7 +796,7 @@ class MatematDatabase(object):
                     LIMIT 1
                   ), u.balance)
                 FROM users AS u
-            ''', [to_date.timestamp()])
+            ''', {'to_date': to_date.timestamp()})
             for balance, in c.fetchall():
                 if balance > 0:
                     positive_balance += balance

matemat/db/migrations.py

@@ -276,3 +276,22 @@ def migrate_schema_5_to_6(c: sqlite3.Cursor):
     ALTER TABLE products ADD COLUMN
     custom_price INTEGER(1) DEFAULT 0;
     ''')
+
+
+def migrate_schema_6_to_7(c: sqlite3.Cursor):
+    # Add custom_price column
+    c.execute('''
+    ALTER TABLE users ADD COLUMN
+    logout_after_purchase INTEGER(1) DEFAULT 0;
+    ''')
+
+
+def migrate_schema_7_to_8(c: sqlite3.Cursor):
+    # Add ean column
+    c.execute('''
+    ALTER TABLE products ADD COLUMN ean TEXT DEFAULT NULL
+    ''')
+    # Make ean column unique
+    c.execute('''
+    CREATE UNIQUE INDEX _matemat_products_ean_unique ON products(ean)
+    ''')

matemat/db/primitives/Product.py

@@ -11,11 +11,12 @@ class Product:
     :param custom_price: If true, the user can choose the price to pay, but at least the regular price.
     :param stock: The number of items of this product currently in stock, or None if not stockable.
     :param stockable: Whether this product is stockable.
+    :param ean: The product's EAN code.  May be None.
     """
 
     def __init__(self, _id: int, name: str,
                  price_member: int, price_non_member: int, custom_price: bool,
-                 stockable: bool, stock: int) -> None:
+                 stockable: bool, stock: int, ean: str) -> None:
         self.id: int = _id
         self.name: str = name
         self.price_member: int = price_member
@@ -23,6 +24,7 @@ class Product:
         self.custom_price: bool = custom_price
         self.stock: int = stock
         self.stockable: bool = stockable
+        self.ean: str = ean
 
     def __eq__(self, other) -> bool:
         if not isinstance(other, Product):
@@ -33,8 +35,9 @@ class Product:
             self.price_non_member == other.price_non_member and \
             self.custom_price == other.custom_price and \
             self.stock == other.stock and \
-            self.stockable == other.stockable
+            self.stockable == other.stockable and \
+            self.ean == other.ean
 
     def __hash__(self) -> int:
         return hash((self.id, self.name, self.price_member, self.price_non_member, self.custom_price,
-                     self.stock, self.stockable))
+                     self.stock, self.stockable, self.ean))

matemat/db/primitives/Transaction.py

@@ -27,7 +27,7 @@ class Transaction:
 
     @property
     def receipt_date(self) -> str:
-        if self.date == datetime.fromtimestamp(0):
+        if self.date == datetime.fromtimestamp(0, UTC):
             return '<unknown>        '
         date: str = self.date.strftime('%d.%m.%Y, %H:%M')
         return date

matemat/db/primitives/User.py

@@ -26,7 +26,8 @@ class User:
                  email: Optional[str] = None,
                  is_admin: bool = False,
                  is_member: bool = False,
-                 receipt_pref: ReceiptPreference = ReceiptPreference.NONE) -> None:
+                 receipt_pref: ReceiptPreference = ReceiptPreference.NONE,
+                 logout_after_purchase: bool = False) -> None:
         self.id: int = _id
         self.name: str = name
         self.balance: int = balance
@@ -34,6 +35,7 @@ class User:
         self.is_admin: bool = is_admin
         self.is_member: bool = is_member
         self.receipt_pref: ReceiptPreference = receipt_pref
+        self.logout_after_purchase: bool = logout_after_purchase
 
     def __eq__(self, other) -> bool:
         if not isinstance(other, User):
@@ -44,7 +46,9 @@ class User:
             self.email == other.email and \
             self.is_admin == other.is_admin and \
             self.is_member == other.is_member and \
-            self.receipt_pref == other.receipt_pref
+            self.receipt_pref == other.receipt_pref and \
+            self.logout_after_purchase == other.logout_after_purchase
 
     def __hash__(self) -> int:
-        return hash((self.id, self.name, self.balance, self.email, self.is_admin, self.is_member, self.receipt_pref))
+        return hash((self.id, self.name, self.balance, self.email, self.is_admin, self.is_member, self.receipt_pref,
+                     self.logout_after_purchase))

matemat/db/schemas.py

@@ -413,3 +413,166 @@ SCHEMAS[6] = [
         ON DELETE SET NULL ON UPDATE CASCADE
     );
     ''']
+
+
+SCHEMAS[7] = [
+    '''
+    CREATE TABLE users (
+      user_id INTEGER PRIMARY KEY,
+      username TEXT UNIQUE NOT NULL,
+      email TEXT DEFAULT NULL,
+      password TEXT NOT NULL,
+      touchkey TEXT DEFAULT NULL,
+      is_admin INTEGER(1) NOT NULL DEFAULT 0,
+      is_member INTEGER(1) NOT NULL DEFAULT 1,
+      balance INTEGER(8) NOT NULL DEFAULT 0,
+      lastchange INTEGER(8) NOT NULL DEFAULT 0,
+      receipt_pref INTEGER(1) NOT NULL DEFAULT 0,
+      created INTEGER(8) NOT NULL DEFAULT 0,
+      logout_after_purchase INTEGER(1) DEFAULT 0
+    );
+    ''',
+    '''
+    CREATE TABLE products (
+      product_id INTEGER PRIMARY KEY,
+      name TEXT UNIQUE NOT NULL,
+      stock INTEGER(8) DEFAULT 0,
+      stockable INTEGER(1) DEFAULT 1,
+      price_member INTEGER(8) NOT NULL,
+      price_non_member INTEGER(8) NOT NULL,
+      custom_price INTEGER(1) DEFAULT 0
+    );
+    ''',
+    '''
+    CREATE TABLE transactions (  -- "superclass" of the following 3 tables
+      ta_id INTEGER PRIMARY KEY,
+      user_id INTEGER DEFAULT NULL,
+      value INTEGER(8) NOT NULL,
+      old_balance INTEGER(8) NOT NULL,
+      date INTEGER(8) DEFAULT (STRFTIME('%s', 'now')),
+      FOREIGN KEY (user_id) REFERENCES users(user_id)
+        ON DELETE SET NULL ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE consumptions (  -- transactions involving buying a product
+      ta_id INTEGER PRIMARY KEY,
+      product TEXT NOT NULL,
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE deposits (  -- transactions involving depositing cash
+      ta_id INTEGER PRIMARY KEY,
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE modifications (  -- transactions involving balance modification by an admin
+      ta_id INTEGER NOT NULL,
+      agent TEXT NOT NULL,
+      reason TEXT DEFAULT NULL,
+      PRIMARY KEY (ta_id),
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE receipts (  -- receipts sent to the users
+      receipt_id INTEGER PRIMARY KEY,
+      user_id INTEGER NOT NULL,
+      first_ta_id INTEGER DEFAULT NULL,
+      last_ta_id INTEGER DEFAULT NULL,
+      date INTEGER(8) DEFAULT (STRFTIME('%s', 'now')),
+      FOREIGN KEY (user_id) REFERENCES users(user_id)
+        ON DELETE CASCADE ON UPDATE CASCADE,
+      FOREIGN KEY (first_ta_id) REFERENCES transactions(ta_id)
+        ON DELETE SET NULL ON UPDATE CASCADE,
+      FOREIGN KEY (last_ta_id) REFERENCES transactions(ta_id)
+        ON DELETE SET NULL ON UPDATE CASCADE
+    );
+    ''']
+
+
+SCHEMAS[8] = [
+    '''
+    CREATE TABLE users (
+      user_id INTEGER PRIMARY KEY,
+      username TEXT UNIQUE NOT NULL,
+      email TEXT DEFAULT NULL,
+      password TEXT NOT NULL,
+      touchkey TEXT DEFAULT NULL,
+      is_admin INTEGER(1) NOT NULL DEFAULT 0,
+      is_member INTEGER(1) NOT NULL DEFAULT 1,
+      balance INTEGER(8) NOT NULL DEFAULT 0,
+      lastchange INTEGER(8) NOT NULL DEFAULT 0,
+      receipt_pref INTEGER(1) NOT NULL DEFAULT 0,
+      created INTEGER(8) NOT NULL DEFAULT 0,
+      logout_after_purchase INTEGER(1) DEFAULT 0
+    );
+    ''',
+    '''
+    CREATE TABLE products (
+      product_id INTEGER PRIMARY KEY,
+      name TEXT UNIQUE NOT NULL,
+      stock INTEGER(8) DEFAULT 0,
+      stockable INTEGER(1) DEFAULT 1,
+      price_member INTEGER(8) NOT NULL,
+      price_non_member INTEGER(8) NOT NULL,
+      custom_price INTEGER(1) DEFAULT 0,
+      ean TEXT UNIQUE DEFAULT NULL
+    );
+    ''',
+    '''
+    CREATE TABLE transactions (  -- "superclass" of the following 3 tables
+      ta_id INTEGER PRIMARY KEY,
+      user_id INTEGER DEFAULT NULL,
+      value INTEGER(8) NOT NULL,
+      old_balance INTEGER(8) NOT NULL,
+      date INTEGER(8) DEFAULT (STRFTIME('%s', 'now')),
+      FOREIGN KEY (user_id) REFERENCES users(user_id)
+        ON DELETE SET NULL ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE consumptions (  -- transactions involving buying a product
+      ta_id INTEGER PRIMARY KEY,
+      product TEXT NOT NULL,
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE deposits (  -- transactions involving depositing cash
+      ta_id INTEGER PRIMARY KEY,
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE modifications (  -- transactions involving balance modification by an admin
+      ta_id INTEGER NOT NULL,
+      agent TEXT NOT NULL,
+      reason TEXT DEFAULT NULL,
+      PRIMARY KEY (ta_id),
+      FOREIGN KEY (ta_id) REFERENCES transactions(ta_id)
+        ON DELETE CASCADE ON UPDATE CASCADE
+    );
+    ''',
+    '''
+    CREATE TABLE receipts (  -- receipts sent to the users
+      receipt_id INTEGER PRIMARY KEY,
+      user_id INTEGER NOT NULL,
+      first_ta_id INTEGER DEFAULT NULL,
+      last_ta_id INTEGER DEFAULT NULL,
+      date INTEGER(8) DEFAULT (STRFTIME('%s', 'now')),
+      FOREIGN KEY (user_id) REFERENCES users(user_id)
+        ON DELETE CASCADE ON UPDATE CASCADE,
+      FOREIGN KEY (first_ta_id) REFERENCES transactions(ta_id)
+        ON DELETE SET NULL ON UPDATE CASCADE,
+      FOREIGN KEY (last_ta_id) REFERENCES transactions(ta_id)
+        ON DELETE SET NULL ON UPDATE CASCADE
+    );
+    ''']

matemat/db/test/test_facade.py

@@ -2,7 +2,7 @@
 import unittest
 
 import crypt
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, UTC
 
 from matemat.db import MatematDatabase
 from matemat.db.primitives import User, Product, ReceiptPreference, Receipt, \
@@ -220,7 +220,7 @@ class DatabaseTest(unittest.TestCase):
     def test_create_product(self) -> None:
         with self.db as db:
             with db.transaction() as c:
-                db.create_product('Club Mate', 200, 200, True, True)
+                db.create_product('Club Mate', 200, 200, True, True, '4029764001807')
                 c.execute("SELECT * FROM products")
                 row = c.fetchone()
                 self.assertEqual('Club Mate', row[1])
@@ -229,18 +229,20 @@ class DatabaseTest(unittest.TestCase):
                 self.assertEqual(200, row[4])
                 self.assertEqual(200, row[5])
                 self.assertEqual(1, row[6])
+                self.assertEqual('4029764001807', row[7])
             with self.assertRaises(ValueError):
-                db.create_product('Club Mate', 250, 250, False, False)
+                db.create_product('Club Mate', 250, 250, False, False, '4029764001807')
 
     def test_get_product(self) -> None:
         with self.db as db:
             with db.transaction(exclusive=False):
-                created = db.create_product('Club Mate', 150, 250, False, False)
+                created = db.create_product('Club Mate', 150, 250, False, False, '4029764001807')
                 product = db.get_product(created.id)
                 self.assertEqual('Club Mate', product.name)
                 self.assertEqual(150, product.price_member)
                 self.assertEqual(250, product.price_non_member)
                 self.assertEqual(False, product.stockable)
+                self.assertEqual('4029764001807', product.ean)
                 with self.assertRaises(ValueError):
                     db.get_product(-1)
 
@@ -249,9 +251,9 @@ class DatabaseTest(unittest.TestCase):
             # Test empty list
             products = db.list_products()
             self.assertEqual(0, len(products))
-            db.create_product('Club Mate', 200, 200, False, True)
-            db.create_product('Flora Power Mate', 200, 200, False, False)
-            db.create_product('Fritz Mate', 200, 250, False, True)
+            db.create_product('Club Mate', 200, 200, False, True, '4029764001807')
+            db.create_product('Flora Power Mate', 200, 200, False, False, None)
+            db.create_product('Fritz Mate', 200, 250, False, True, '4260107223177')
             products = db.list_products()
             self.assertEqual(3, len(products))
         productcheck = {}
@@ -260,22 +262,25 @@ class DatabaseTest(unittest.TestCase):
                 self.assertEqual(200, product.price_member)
                 self.assertEqual(200, product.price_non_member)
                 self.assertTrue(product.stockable)
+                self.assertEqual('4029764001807', product.ean)
             elif product.name == 'Flora Power Mate':
                 self.assertEqual(200, product.price_member)
                 self.assertEqual(200, product.price_non_member)
                 self.assertFalse(product.stockable)
+                self.assertEqual(None, product.ean)
             elif product.name == 'Fritz Mate':
                 self.assertEqual(200, product.price_member)
                 self.assertEqual(250, product.price_non_member)
                 self.assertTrue(product.stockable)
+                self.assertEqual('4260107223177', product.ean)
             productcheck[product.id] = 1
         self.assertEqual(3, len(productcheck))
 
     def test_change_product(self) -> None:
         with self.db as db:
-            product = db.create_product('Club Mate', 200, 200, False, True)
+            product = db.create_product('Club Mate', 200, 200, False, True, '4029764001807')
             db.change_product(product, name='Flora Power Mate', price_member=150, price_non_member=250,
-                              custom_price=True, stock=None, stockable=False)
+                              custom_price=True, stock=None, stockable=False, ean=None)
             # Changes must be reflected in the passed object
             self.assertEqual('Flora Power Mate', product.name)
             self.assertEqual(150, product.price_member)
@@ -283,6 +288,7 @@ class DatabaseTest(unittest.TestCase):
             self.assertEqual(True, product.custom_price)
             self.assertEqual(None, product.stock)
             self.assertEqual(False, product.stockable)
+            self.assertEqual(None, product.ean)
             # Changes must be reflected in the database
             checkproduct = db.get_product(product.id)
             self.assertEqual('Flora Power Mate', checkproduct.name)
@@ -294,7 +300,7 @@ class DatabaseTest(unittest.TestCase):
             product.id = -1
             with self.assertRaises(DatabaseConsistencyError):
                 db.change_product(product)
-            product2 = db.create_product('Club Mate', 200, 200, False, True)
+            product2 = db.create_product('Club Mate', 200, 200, False, True, '4029764001807')
             product2.name = 'Flora Power Mate'
             with self.assertRaises(DatabaseConsistencyError):
                 # Should fail, as a product with the same name already exists.
@@ -302,8 +308,8 @@ class DatabaseTest(unittest.TestCase):
 
     def test_delete_product(self) -> None:
         with self.db as db:
-            product = db.create_product('Club Mate', 200, 200, False, True)
-            product2 = db.create_product('Flora Power Mate', 200, 200, False, False)
+            product = db.create_product('Club Mate', 200, 200, False, True, '4029764001807')
+            product2 = db.create_product('Flora Power Mate', 200, 200, False, False, None)
 
             self.assertEqual(2, len(db.list_products()))
             db.delete_product(product)
@@ -342,9 +348,9 @@ class DatabaseTest(unittest.TestCase):
     def test_transfer(self) -> None:
         with self.db as db:
             with db.transaction() as c:
-                user = db.create_user('testuser', 'supersecurepassword', 'testuser@example.com', True, True)
-                user2 = db.create_user('testuser2', 'supersecurepassword', 'testuser@example.com', True, True)
-                user3 = db.create_user('testuser3', 'supersecurepassword', 'testuser@example.com', True, True)
+                user = db.create_user('testuser', 'supersecurepassword', 'testuser@example.com', True, True, False)
+                user2 = db.create_user('testuser2', 'supersecurepassword', 'testuser@example.com', True, True, False)
+                user3 = db.create_user('testuser3', 'supersecurepassword', 'testuser@example.com', True, True, True)
                 c.execute('''SELECT balance FROM users WHERE user_id = ?''', [user.id])
                 self.assertEqual(0, c.fetchone()[0])
                 c.execute('''SELECT balance FROM users WHERE user_id = ?''', [user2.id])
@@ -378,9 +384,9 @@ class DatabaseTest(unittest.TestCase):
             db.deposit(user1, 1337)
             db.deposit(user2, 4242)
             db.deposit(user3, 1234)
-            clubmate = db.create_product('Club Mate', 200, 200, False, True)
-            florapowermate = db.create_product('Flora Power Mate', 150, 250, False, True)
-            fritzmate = db.create_product('Fritz Mate', 200, 200, False, True)
+            clubmate = db.create_product('Club Mate', 200, 200, False, True, '4029764001807')
+            florapowermate = db.create_product('Flora Power Mate', 150, 250, False, True, None)
+            fritzmate = db.create_product('Fritz Mate', 200, 200, False, True, '4260107223177')
 
             # user1 is somewhat addicted to caffeine
             for _ in range(3):
@@ -430,10 +436,10 @@ class DatabaseTest(unittest.TestCase):
             user7 = db.create_user('user7', 'supersecurepassword', 'user7@example.com', True, True)
             user7.receipt_pref = 42
 
-            twoyears: int = int((datetime.utcnow() - timedelta(days=730)).timestamp())
-            halfyear: int = int((datetime.utcnow() - timedelta(days=183)).timestamp())
-            twomonths: int = int((datetime.utcnow() - timedelta(days=61)).timestamp())
-            halfmonth: int = int((datetime.utcnow() - timedelta(days=15)).timestamp())
+            twoyears: int = int((datetime.now(UTC) - timedelta(days=730)).timestamp())
+            halfyear: int = int((datetime.now(UTC) - timedelta(days=183)).timestamp())
+            twomonths: int = int((datetime.now(UTC) - timedelta(days=61)).timestamp())
+            halfmonth: int = int((datetime.now(UTC) - timedelta(days=15)).timestamp())
 
             with db.transaction() as c:
                 # Fix creation date for user2
@@ -506,7 +512,7 @@ class DatabaseTest(unittest.TestCase):
 
             admin: User = db.create_user('admin', 'supersecurepassword', 'admin@example.com', True, True)
             user: User = db.create_user('user', 'supersecurepassword', 'user@example.com', True, True)
-            product: Product = db.create_product('Flora Power Mate', 200, 200, False, True)
+            product: Product = db.create_product('Flora Power Mate', 200, 200, False, True, None)
 
             # Create some transactions
             db.change_user(user, agent=admin,
@@ -533,7 +539,7 @@ class DatabaseTest(unittest.TestCase):
                 SELECT user_id, 500, balance
                 FROM users
                 WHERE user_id = :id
-                ''', [user.id])
+                ''', {'id': user.id})
             receipt3: Receipt = db.create_receipt(user, write=False)
 
             with db.transaction() as c:
@@ -595,8 +601,8 @@ class DatabaseTest(unittest.TestCase):
             user2: User = db.create_user('user2', 'supersecurepassword', 'user2@example.com', True, False)
             user3: User = db.create_user('user3', 'supersecurepassword', 'user3@example.com', True, False)
             user4: User = db.create_user('user4', 'supersecurepassword', 'user4@example.com', True, False)
-            flora: Product = db.create_product('Flora Power Mate', 200, 200, False, True)
-            club: Product = db.create_product('Club Mate', 200, 200, False, False)
+            flora: Product = db.create_product('Flora Power Mate', 200, 200, False, True, None)
+            club: Product = db.create_product('Club Mate', 200, 200, False, False, '4029764001807')
 
             # Create some transactions
             db.deposit(user1, 1337)
@@ -610,7 +616,7 @@ class DatabaseTest(unittest.TestCase):
                 db.increment_consumption(user4, club)
 
             # Generate statistics
-            now = datetime.utcnow()
+            now = datetime.now(UTC)
             stats = db.generate_sales_statistics(now - timedelta(days=1), now + timedelta(days=1))
 
             self.assertEqual(7, len(stats))

matemat/db/test/test_wrapper.py

@@ -53,12 +53,12 @@ class DatabaseTest(unittest.TestCase):
         with self.db as db:
             with db.transaction() as c:
                 c.execute('''
-                INSERT INTO users VALUES (1, 'testuser', NULL, 'supersecurepassword', NULL, 1, 1, 0, 42, 0, 0)
+                INSERT INTO users VALUES (1, 'testuser', NULL, 'supersecurepassword', NULL, 1, 1, 0, 42, 0, 0, 0)
                 ''')
             c = db._sqlite_db.cursor()
             c.execute("SELECT * FROM users")
             user = c.fetchone()
-            self.assertEqual((1, 'testuser', None, 'supersecurepassword', None, 1, 1, 0, 42, 0, 0), user)
+            self.assertEqual((1, 'testuser', None, 'supersecurepassword', None, 1, 1, 0, 42, 0, 0, 0), user)
 
     def test_transaction_rollback(self) -> None:
         """
@@ -68,7 +68,7 @@ class DatabaseTest(unittest.TestCase):
             try:
                 with db.transaction() as c:
                     c.execute('''
-                      INSERT INTO users VALUES (1, 'testuser', NULL, 'supersecurepassword', NULL, 1, 1, 0, 42, 0, 0)
+                      INSERT INTO users VALUES (1, 'testuser', NULL, 'supersecurepassword', NULL, 1, 1, 0, 42, 0, 0, 0)
                     ''')
                     raise ValueError('This should trigger a rollback')
             except ValueError as e:

matemat/db/wrapper.py

@@ -40,7 +40,7 @@ class DatabaseTransaction(object):
 
 class DatabaseWrapper(object):
 
-    SCHEMA_VERSION = 6
+    SCHEMA_VERSION = 8
 
     def __init__(self, filename: str) -> None:
         self._filename: str = filename
@@ -89,6 +89,10 @@ class DatabaseWrapper(object):
                 migrate_schema_4_to_5(c)
             if from_version <= 5 and to_version >= 6:
                 migrate_schema_5_to_6(c)
+            if from_version <= 6 and to_version >= 7:
+                migrate_schema_6_to_7(c)
+            if from_version <= 7 and to_version >= 8:
+                migrate_schema_7_to_8(c)
 
     def connect(self) -> None:
         if self.is_connected():

matemat/exceptions/DatabaseConsistencyError.py

@@ -2,7 +2,7 @@
 from typing import Optional
 
 
-class DatabaseConsistencyError(BaseException):
+class DatabaseConsistencyError(Exception):
 
     def __init__(self, msg: Optional[str] = None) -> None:
         self._msg: Optional[str] = msg

matemat/util/monthdelta.py

@@ -28,5 +28,5 @@ def add_months(d: datetime, months: int) -> datetime:
     # Set the day of month temporarily to 1, then add the day offset to reach the 1st of the target month
     newdate: datetime = d.replace(day=1) + timedelta(days=days)
     # Re-set the day of month to the intended value, but capped by the max. day in the target month
-    newdate = newdate.replace(day=min(d.day, calendar.monthrange(newdate.year, newdate.month)[1]))
+    newdate = newdate.replace(day=min(d.day, calendar.monthrange(newdate.year, newdate.month)[1]), tzinfo=d.tzinfo)
     return newdate

matemat/webserver/pagelets/admin.py

@@ -1,5 +1,5 @@
 import os
-from datetime import datetime
+from datetime import datetime, UTC
 from io import BytesIO
 from shutil import copyfile
 
@@ -13,6 +13,7 @@ from matemat.exceptions import AuthenticationError, DatabaseConsistencyError
 from matemat.util.currency_format import parse_chf
 from matemat.webserver import session, template
 from matemat.webserver.config import get_app_config, get_stock_provider
+from matemat.webserver.template import Notification
 
 
 @get('/admin')
@@ -48,7 +49,7 @@ def admin():
         users = db.list_users()
         products = db.list_products()
         # Render the "Admin/Settings" page
-        now = str(int(datetime.utcnow().timestamp()))
+        now = str(int(datetime.now(UTC).timestamp()))
         return template.render('admin.html',
                                authuser=user, authlevel=authlevel, users=users, products=products,
                                receipt_preference_class=ReceiptPreference, now=now,
@@ -75,6 +76,7 @@ def handle_change(args: FormsDict, files: FormsDict, user: User, db: MatematData
                 return
             username = str(args.username)
             email = str(args.email)
+            logout_after_purchase = 'logout_after_purchase' in args
             # An empty e-mail field should be interpreted as NULL
             if len(email) == 0:
                 email = None
@@ -84,7 +86,8 @@ def handle_change(args: FormsDict, files: FormsDict, user: User, db: MatematData
                 return
             # Attempt to update username, e-mail and receipt preference
             try:
-                db.change_user(user, agent=None, name=username, email=email, receipt_pref=receipt_pref)
+                db.change_user(user, agent=None, name=username, email=email, receipt_pref=receipt_pref,
+                               logout_after_purchase=logout_after_purchase)
             except DatabaseConsistencyError:
                 return
 
@@ -176,8 +179,10 @@ def handle_admin_change(args: FormsDict, files: FormsDict, db: MatematDatabase):
             password = str(args.password)
             is_member = 'ismember' in args
             is_admin = 'isadmin' in args
+            logout_after_purchase = 'logout_after_purchase' in args
             # Create the user in the database
-            newuser: User = db.create_user(username, password, email, member=is_member, admin=is_admin)
+            newuser: User = db.create_user(username, password, email, member=is_member, admin=is_admin,
+                                           logout_after_purchase=logout_after_purchase)
 
             # If a default avatar is set, copy it to the user's avatar path
 
@@ -202,8 +207,9 @@ def handle_admin_change(args: FormsDict, files: FormsDict, db: MatematDatabase):
             price_non_member = parse_chf(str(args.pricenonmember))
             custom_price = 'custom_price' in args
             stockable = 'stockable' in args
-            # Create the user in the database
-            newproduct = db.create_product(name, price_member, price_non_member, custom_price, stockable)
+            ean = str(args.ean) or None
+            # Create the product in the database
+            newproduct = db.create_product(name, price_member, price_non_member, custom_price, stockable, ean)
             # If a new product image was uploaded, process it
             image = files.image.file.read() if 'image' in files else None
             if image is not None and len(image) > 0:
@@ -221,7 +227,8 @@ def handle_admin_change(args: FormsDict, files: FormsDict, db: MatematDatabase):
                     image.thumbnail((150, 150), Image.LANCZOS)
                     # Write the image to the file
                     image.save(os.path.join(abspath, f'{newproduct.id}.png'), 'PNG')
-                except OSError:
+                except OSError as e:
+                    Notification.error(str(e), decay=True)
                     return
             else:
                 # If no image was uploaded and a default avatar is set, copy it to the product's avatar path
@@ -277,8 +284,10 @@ def handle_admin_change(args: FormsDict, files: FormsDict, db: MatematDatabase):
                     image.thumbnail((150, 150), Image.LANCZOS)
                     # Write the image to the file
                     image.save(os.path.join(abspath, f'default.png'), 'PNG')
-                except OSError:
+                except OSError as e:
+                    Notification.error(str(e), decay=True)
                     return
 
-    except UnicodeDecodeError:
-        raise ValueError('an argument not a string')
+    except Exception as e:
+        Notification.error(str(e), decay=True)
+        return

matemat/webserver/pagelets/buy.py

@@ -16,6 +16,7 @@ def buy():
     # If no user is logged in, redirect to the main page, as a purchase must always be bound to a user
     if not session.has(session_id, 'authenticated_user'):
         redirect('/')
+    authlevel: int = session.get(session_id, 'authentication_level')
     # Connect to the database
     with MatematDatabase(config['DatabaseFile']) as db:
         # Fetch the authenticated user from the database
@@ -34,6 +35,9 @@ def buy():
                 stock_provider = c.get_stock_provider()
                 if stock_provider.needs_update():
                     stock_provider.update_stock(product, -1)
+                # Logout user if configured, logged in via touchkey and no price entry input was shown
+                if user.logout_after_purchase and authlevel < 2 and not product.custom_price:
+                    redirect(f'/logout?lastaction=buy&lastproduct={pid}&lastprice={price}')
                 # Redirect to the main page (where this request should have come from)
                 redirect(f'/?lastaction=buy&lastproduct={pid}&lastprice={price}')
     redirect('/')

matemat/webserver/pagelets/logout.py

@@ -1,4 +1,6 @@
-from bottle import get, post, redirect
+import urllib.parse
+
+from bottle import get, post, redirect, request
 
 from matemat.webserver import session
 
@@ -16,4 +18,4 @@ def logout():
     # Reset the authlevel session variable (0 = none, 1 = touchkey, 2 = password login)
     session.put(session_id, 'authentication_level', 0)
     # Redirect to the main page, showing the user list
-    redirect('/')
+    redirect(f'/?{urllib.parse.urlencode(request.query)}')

matemat/webserver/pagelets/main.py

@@ -1,10 +1,12 @@
-from datetime import datetime
+from datetime import datetime, UTC
 
 from bottle import route, redirect, request
 
 from matemat.db import MatematDatabase
 from matemat.webserver import template, session
+from matemat.webserver.template import Notification
 from matemat.webserver.config import get_app_config, get_stock_provider
+from matemat.util.currency_format import format_chf
 
 
 @route('/')
@@ -14,27 +16,40 @@ def main_page():
     """
     config = get_app_config()
     session_id: str = session.start()
-    now = str(int(datetime.utcnow().timestamp()))
+    now = str(int(datetime.now(UTC).timestamp()))
     with MatematDatabase(config['DatabaseFile']) as db:
+        # Fetch the list of products to display
+        products = db.list_products()
+        lastprice = int(request.params.lastprice) if request.params.lastprice else None
+        if request.params.lastaction == 'deposit' and lastprice:
+            Notification.success(f'Deposited {format_chf(lastprice)}', decay=True)
+        elif request.params.lastaction == 'buy' and lastprice and request.params.lastproduct:
+            lastproduct = db.get_product(request.params.lastproduct)
+            Notification.success(f'Purchased {lastproduct.name} for {format_chf(lastprice)}', decay=True)
+        buyproduct = None
+
+        if request.params.ean:
+            try:
+                buyproduct = db.get_product_by_ean(request.params.ean)
+                Notification.success(
+                    f'Login will purchase <strong>{buyproduct.name}</strong>. Click <a href="/">here</a> to abort.')
+            except ValueError:
+                Notification.error(f'EAN code {request.params.ean} is not associated with any product.', decay=True)
+
         # Check whether a user is logged in
         if session.has(session_id, 'authenticated_user'):
             # Fetch the user id and authentication level (touchkey vs password) from the session storage
             uid: int = session.get(session_id, 'authenticated_user')
             authlevel: int = session.get(session_id, 'authentication_level')
+            # If an EAN code was scanned, directly trigger the purchase
+            if buyproduct:
+                redirect(f'/buy?pid={buyproduct.id}')
             # Fetch the user object from the database (for name display, price calculation and admin check)
             users = db.list_users()
             user = db.get_user(uid)
-            # Fetch the list of products to display
-            products = db.list_products()
-            if request.params.lastproduct:
-                lastproduct = db.get_product(request.params.lastproduct)
-            else:
-                lastproduct = None
-            lastprice = int(request.params.lastprice) if request.params.lastprice else None
             # Prepare a response with a jinja2 template
             return template.render('productlist.html',
                                    authuser=user, users=users, products=products, authlevel=authlevel,
-                                   lastaction=request.params.lastaction, lastprice=lastprice, lastproduct=lastproduct,
                                    stock=get_stock_provider(), setupname=config['InstanceName'], now=now)
         else:
             # If there are no admin users registered, jump to the admin creation procedure
@@ -44,4 +59,5 @@ def main_page():
             users = db.list_users(with_touchkey=True)
             return template.render('userlist.html',
                                    users=users, setupname=config['InstanceName'], now=now,
-                                   signup=(config.get('SignupEnabled', '0') == '1'))
+                                   signup=(config.get('SignupEnabled', '0') == '1'),
+                                   buyproduct=buyproduct)

matemat/webserver/pagelets/modproduct.py

@@ -1,6 +1,6 @@
 import os
 from io import BytesIO
-from datetime import datetime
+from datetime import datetime, UTC
 from typing import Dict
 
 import magic
@@ -56,7 +56,7 @@ def modproduct():
                 redirect('/admin')
 
         # Render the "Modify Product" page
-        now = str(int(datetime.utcnow().timestamp()))
+        now = str(int(datetime.now(UTC).timestamp()))
         return template.render('modproduct.html',
                                authuser=authuser, product=product, authlevel=authlevel,
                                setupname=config['InstanceName'], now=now)
@@ -98,11 +98,12 @@ def handle_change(args: FormsDict, files: FormsDict, product: Product, db: Matem
         custom_price = 'custom_price' in args
         stock = int(str(args.stock))
         stockable = 'stockable' in args
+        ean = str(args.ean) or None
         # Attempt to write the changes to the database
         try:
             db.change_product(product,
                               name=name, price_member=price_member, price_non_member=price_non_member,
-                              custom_price=custom_price, stock=stock, stockable=stockable)
+                              custom_price=custom_price, stock=stock, stockable=stockable, ean=ean)
             stock_provider = get_stock_provider()
             if stock_provider.needs_update() and product.stockable:
                 stock_provider.set_stock(product, stock)

matemat/webserver/pagelets/moduser.py

@@ -1,5 +1,5 @@
 import os
-from datetime import datetime
+from datetime import datetime, UTC
 from io import BytesIO
 from typing import Dict, Optional
 
@@ -56,7 +56,7 @@ def moduser():
                 redirect('/admin')
 
         # Render the "Modify User" page
-        now = str(int(datetime.utcnow().timestamp()))
+        now = str(int(datetime.now(UTC).timestamp()))
         return template.render('moduser.html',
                                authuser=authuser, user=user, authlevel=authlevel, now=now,
                                receipt_preference_class=ReceiptPreference,
@@ -111,6 +111,7 @@ def handle_change(args: FormsDict, files: FormsDict, user: User, authuser: User,
             balance_reason = None
         is_member = 'ismember' in args
         is_admin = 'isadmin' in args
+        logout_after_purchase = 'logout_after_purchase' in args
         # An empty e-mail field should be interpreted as NULL
         if len(email) == 0:
             email = None
@@ -121,7 +122,8 @@ def handle_change(args: FormsDict, files: FormsDict, user: User, authuser: User,
                 db.change_password(user, '', password, verify_password=False)
             # Write the user detail changes
             db.change_user(user, agent=authuser, name=username, email=email, is_member=is_member, is_admin=is_admin,
-                           balance=balance, balance_reason=balance_reason, receipt_pref=receipt_pref)
+                           balance=balance, balance_reason=balance_reason, receipt_pref=receipt_pref,
+                           logout_after_purchase=logout_after_purchase)
         except DatabaseConsistencyError:
             return
         # If a new avatar was uploaded, process it

matemat/webserver/pagelets/statistics.py

@@ -1,4 +1,4 @@
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, UTC
 from math import pi, sin, cos
 from typing import Any, Dict, List, Tuple
 
@@ -34,7 +34,7 @@ def statistics():
             # Show a 403 Forbidden error page if the user is not an admin
             abort(403)
 
-        todate: datetime = datetime.utcnow()
+        todate: datetime = datetime.now(UTC)
         fromdate: datetime = (todate - timedelta(days=365)).replace(hour=0, minute=0, second=0, microsecond=0)
         if 'fromdate' in request.params:
             fdarg: str = str(request.params.fromdate)

matemat/webserver/pagelets/touchkey.py

@@ -4,6 +4,7 @@ from matemat.db import MatematDatabase
 from matemat.db.primitives import User
 from matemat.exceptions import AuthenticationError
 from matemat.webserver import template, session
+from matemat.webserver.template import Notification
 from matemat.webserver.config import get_app_config
 
 
@@ -16,14 +17,24 @@ def touchkey_page():
     """
     config = get_app_config()
     session_id: str = session.start()
+    with MatematDatabase(config['DatabaseFile']) as db:
         # 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 GET, render the login page showing the touchkey UI
         if request.method == 'GET':
+            buypid = None
+            if request.params.buypid:
+                buypid = str(request.params.buypid)
+                try:
+                    buyproduct = db.get_product(int(buypid))
+                    Notification.success(
+                        f'Login will purchase <strong>{buyproduct.name}</strong>. Click <a href="/">here</a> to abort.')
+                except ValueError:
+                    Notification.error(f'No product with id {buypid}', decay=True)
             return template.render('touchkey.html',
                                    username=str(request.params.username), uid=int(str(request.params.uid)),
-                               setupname=config['InstanceName'])
+                                   setupname=config['InstanceName'], buypid=buypid)
         # If requested via HTTP POST, read the request arguments and attempt to log in with the provided credentials
         elif request.method == 'POST':
             # Connect to the database
@@ -38,6 +49,9 @@ def touchkey_page():
             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', 1)
+            if request.params.buypid:
+                buypid = str(request.params.buypid)
+                redirect(f'/buy?pid={buypid}')
             # Redirect to the main page, showing the product list
             redirect('/')
         # If neither GET nor POST was used, show a 405 Method Not Allowed error page

matemat/webserver/session/sessions.py

@@ -3,7 +3,7 @@ from typing import Any, Dict, Tuple, Optional
 from bottle import request, response
 from secrets import token_bytes
 from uuid import uuid4
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, UTC
 
 __key: Optional[str] = token_bytes(32)
 
@@ -21,7 +21,7 @@ def start() -> str:
     :return: The session ID.
     """
     # Reference date for session timeout
-    now = datetime.utcnow()
+    now = datetime.now(UTC)
     # Read the client's session ID, if any
     session_id = request.get_cookie(_COOKIE_NAME, secret=__key)
     # If there is no active session, create a new session ID

matemat/webserver/template/__init__.py

@@ -1,2 +1,3 @@
 
+from .notification import Notification
 from .template import init, render

matemat/webserver/template/notification.py

@@ -0,0 +1,25 @@
+
+
+class Notification:
+    notifications = []
+
+    def __init__(self, msg: str, classes=None, decay: bool = False):
+        self.msg = msg
+        self.classes = []
+        self.classes.extend(classes)
+        if decay:
+            self.classes.append('decay')
+
+    @classmethod
+    def render(cls):
+        n = list(cls.notifications)
+        cls.notifications.clear()
+        return n
+
+    @classmethod
+    def success(cls, msg: str, decay: bool = False):
+        cls.notifications.append(cls(msg, classes=['success'], decay=decay))
+
+    @classmethod
+    def error(cls, msg: str, decay: bool = False):
+        cls.notifications.append(cls(msg, classes=['error'], decay=decay))

matemat/webserver/template/template.py

@@ -2,9 +2,15 @@ from typing import Any, Dict
 
 import os.path
 import jinja2
+import netaddr
+
+from bottle import request
 
 from matemat import __version__
 from matemat.util.currency_format import format_chf
+from matemat.webserver.template import Notification
+from matemat.webserver.config import get_app_config
+
 
 __jinja_env: jinja2.Environment = None
 
@@ -21,5 +27,16 @@ def init(config: Dict[str, Any]) -> None:
 
 def render(name: str, **kwargs):
     global __jinja_env
+    config = get_app_config()
     template: jinja2.Template = __jinja_env.get_template(name)
-    return template.render(__version__=__version__, **kwargs).encode('utf-8')
+    wsacl = netaddr.IPSet([addr.strip() for addr in config.get('EanWebsocketAcl', '').split(',')])
+    if config.get('EanWebsocketUrl', '') and request.remote_addr in wsacl:
+        eanwebsocket = config.get('EanWebsocketUrl')
+    else:
+        eanwebsocket = None
+    return template.render(
+        __version__=__version__,
+        notifications=Notification.render(),
+        eanwebsocket=eanwebsocket,
+        **kwargs
+    ).encode('utf-8')

package/debian/matemat/etc/matemat.conf

@@ -37,6 +37,13 @@ InstanceName=Matemat
 #SignupEnabled=1
 #SignupKioskMode= ::1, ::ffff:127.0.0.0/8, 127.0.0.0/8
 
+#
+# Open a websocket connection on which to listen for scanned barcodes.
+# Can be restricted so that e.g. the connection is only attempted when the client is localhost.
+#
+#EanWebsocketUrl=ws://localhost:47808/ws
+#EanWebsocketAcl=::1,::ffff:127.0.0.0/104,127.0.0.0/8
+
 
 # Add static HTTP headers in this section
 # [HttpHeaders]

static/css/matemat.css

@@ -13,8 +13,8 @@ nav div {
 
 .thumblist-item {
     display: inline-block;
-    margin: 5px;
-    padding: 5px;
+    margin: 5px 5px 10px 10px;
+    padding: 15px;
     background: #f0f0f0;
     text-decoration: none;
 }
@@ -52,6 +52,25 @@ nav div {
     padding: 10px;
 }
 
+.notification {
+    display: block;
+    width: calc(100% - 36px);
+    margin: 10px;
+    padding: 10px;
+}
+.notification.success {
+    background-color: #c0ffc0;
+}
+.notification.error {
+    background-color: #ffc0c0;
+}
+.notification.decay {
+    animation: notificationdecay 0s 7s forwards;
+}
+@keyframes notificationdecay {
+    to { display: none; }
+}
+
 @media print {
     footer {
         position: fixed;
@@ -298,37 +317,3 @@ div.osk-button.osk-button-space {
     flex: 5 0 1px;
     color: #606060;
 }
-
-aside#overlay {
-    position: absolute;
-    top: 0;
-    right: 0;
-    bottom: 0;
-    left: 0;
-    background: #88ff88;
-    text-align: center;
-    z-index: 1000;
-    padding: 5%;
-    font-family: sans-serif;
-    display: none;
-    transition: opacity 700ms;
-    opacity: 0;
-}
-
-aside#overlay.fade {
-    opacity: 100%;
-}
-
-aside#overlay > h2 {
-    font-size: 3em;
-}
-
-aside#overlay > img {
-    width: 30%;
-    height: auto;
-}
-
-aside#overlay > div.price {
-    padding-top: 30px;
-    font-size: 2em;
-}

static/js/overlay.js

@@ -1,18 +0,0 @@
-
-setTimeout(() => {
-    let overlay = document.getElementById('overlay');
-    if (overlay !== null) {
-        overlay.style.display = 'block';
-        setTimeout(() => {
-            overlay.classList.add('fade');
-            setTimeout(() => {
-                setTimeout(() => {
-                    overlay.classList.remove('fade');
-                    setTimeout(() => {
-                        overlay.style.display = 'none';
-                    }, 700);
-                }, 700);
-            }, 700);
-        }, 10);
-    }
-}, 0);

templates/admin.html

@@ -23,3 +23,12 @@
     {{ super() }}
 
 {% endblock %}
+
+{% block eanwebsocket %}
+  function (e) {
+  let eaninput = document.getElementById("admin-newproduct-ean");
+  eaninput.value = e.data;
+  eaninput.select();
+  eaninput.scrollIntoView();
+  }
+{% endblock %}

templates/admin_all.html

@@ -23,6 +23,9 @@
         <label for="admin-myaccount-isadmin">Admin: </label>
         <input id="admin-myaccount-isadmin" type="checkbox" disabled="disabled" {% if authuser.is_admin %} checked="checked" {% endif %}/><br/>
 
+        <label for="admin-myaccount-logout-after-purchase">Logout after purchase: </label>
+        <input id="admin-myaccount-logout-after-purchase" type="checkbox" name="logout_after_purchase" {% if authuser.logout_after_purchase %} checked="checked" {% endif %}/><br/>
+
         <input type="submit" value="Save changes" />
     </form>
 </section>

templates/admin_restricted.html

@@ -17,6 +17,9 @@
         <label for="admin-newuser-isadmin">Admin: </label>
         <input id="admin-newuser-isadmin" type="checkbox" name="isadmin" /><br/>
 
+        <label for="admin-newuser-logout-after-purchase">Logout after purchase: </label>
+        <input id="admin-newuser-logout-after-purchase" type="checkbox" name="logout_after_purchase" /><br/>
+
         <input type="submit" value="Create User" />
     </form>
 </section>
@@ -43,6 +46,9 @@
         <label for="admin-newproduct-name">Name: </label>
         <input id="admin-newproduct-name" type="text" name="name" /><br/>
 
+        <label for="admin-newproduct-ean">EAN code: </label>
+        <input id="admin-newproduct-ean" type="text" name="ean" /><br/>
+
         <label for="admin-newproduct-price-member">Member price: </label>
         CHF <input id="admin-newproduct-price-member" type="number" step="0.01" name="pricemember" value="0" /><br/>
 

templates/base.html

@@ -12,18 +12,14 @@
 
 <body>
 
-{% block overlay %}
-{% endblock %}
-
 <header>
     {% block header %}
 
-        {# Always show a link to the home page, either a list of users or of products. #}
         <nav class="navbarbutton">
-            <div class="selected"><a href="/">Home</a></div>
         {# Show a link to the settings, if a user logged in via password (authlevel 2). #}
         {% if authlevel|default(0) > 1 %}
             {% if authuser is defined %}
+                <a href="/">Home</a>
                 {# If a user is an admin, call the link "Administration".  Otherwise, call it "Settings". #}
                 {% if authuser.is_admin %}
                     <a href="/admin">Administration</a>
@@ -38,6 +34,11 @@
 </header>
 
 <main>
+    {% block notifications %}
+    {% for n in notifications | default([]) %}
+    <div class="notification {{ n.classes | join(' ') }}">{{ n.msg|safe }}</div>
+    {% endfor %}
+    {% endblock %}
     {% block main %}
         {# Here be content. #}
     {% endblock %}
@@ -55,6 +56,15 @@
     {% endblock %}
 </footer>
 
-<script src="/static/js/overlay.js"></script>
+{% if eanwebsocket %}
+<script>
+ function connect() {
+     let socket = new WebSocket("{{ eanwebsocket }}");
+     socket.onclose = () => { setTimeout(connect, 1000); };
+     socket.onmessage = {% block eanwebsocket %}() => {}{% endblock %};
+ }
+ window.addEventListener("load", () => { connect(); });
+</script>
+{% endif %}
 </body>
 </html>

templates/modproduct.html

@@ -14,6 +14,9 @@
         <label for="modproduct-name">Name: </label>
         <input id="modproduct-name" type="text" name="name" value="{{ product.name }}" /><br/>
 
+        <label for="modproduct-ean">EAN code: </label>
+        <input id="modproduct-ean" type="text" name="ean" value="{{ product.ean or '' }}" /><br/>
+
         <label for="modproduct-price-member">Member price: </label>
         CHF <input id="modproduct-price-member" type="number" step="0.01" name="pricemember" value="{{ product.price_member|chf(False) }}" /><br/>
 
@@ -49,3 +52,12 @@
 {{ super() }}
 
 {% endblock %}
+
+{% block eanwebsocket %}
+  function (e) {
+  let eaninput = document.getElementById("modproduct-ean");
+  eaninput.value = e.data;
+  eaninput.select();
+  eaninput.scrollIntoView();
+  }
+{% endblock %}

templates/moduser.html

@@ -35,6 +35,9 @@
         <label for="moduser-account-isadmin">Admin: </label>
         <input id="moduser-account-isadmin" name="isadmin" type="checkbox" {% if user.is_admin %} checked="checked" {% endif %}/><br/>
 
+        <label for="admin-myaccount-logout-after-purchase">Logout after purchase: </label>
+        <input id="admin-myaccount-logout-after-purchase" type="checkbox" name="logout_after_purchase" {% if user.logout_after_purchase %} checked="checked" {% endif %}/><br/>
+
         <label for="moduser-account-balance">Balance: </label>
         CHF <input id="moduser-account-balance" name="balance" type="number" step="0.01" value="{{ user.balance|chf(False) }}" /><br/>
 

templates/productlist.html

@@ -6,27 +6,6 @@
     {{ super() }}
 {% endblock %}
 
-{% block overlay %}
-{% if lastaction is not none %}
-{% if lastaction == 'buy' %}
-<aside id="overlay">
-    <h2>{{ lastproduct.name }}</h2>
-    <img src="/static/upload/thumbnails/products/{{ lastproduct.id }}.png?cacheBuster={{ now }}" alt="Picture of {{ lastproduct.name }}" draggable="false"/>
-{% if lastprice is not none %}
-    <div class="price">{{ lastprice|chf }}</div>
-{% endif %}
-</aside>
-{% elif lastaction == 'deposit' %}
-<aside id="overlay">
-    <h2>Deposit</h2>
-{% if lastprice is not none %}
-    <div class="price">{{ lastprice|chf }}</div>
-{% endif %}
-</aside>
-{% endif %}
-{% endif %}
-{% endblock %}
-
 {% block main %}
 
     {# Show the users current balance #}
@@ -74,7 +53,7 @@
             {% if product.custom_price %}
 	    <a onclick="setup_custom_price({{ product.id }}, '{{ product.name}}');">
 	    {% else %}
-            <a href="/buy?pid={{ product.id }}">
+            <a {% if product.ean %}id="a-buy-ean{{ product.ean }}"{% endif %} href="/buy?pid={{ product.id }}">
 	    {% endif %}
                 <span class="thumblist-title">{{ product.name }}</span>
 		{% if product.custom_price %}
@@ -103,3 +82,14 @@
     {{ super() }}
 
 {% endblock %}
+
+{% block eanwebsocket %}
+  function (e) {
+    let eaninput = document.getElementById("a-buy-ean" + e.data);
+    if (eaninput === null) {
+      document.location = "?ean=" + e.data;
+    } else {
+      eaninput.click();
+    }
+  }
+{% endblock %}

templates/touchkey.html

@@ -23,6 +23,9 @@
     <input type="hidden" name="uid" value="{{ uid }}" />
     <input type="hidden" name="username" value="{{ username }}" />
     <input type="hidden" name="touchkey" value="" id="loginform-touchkey-value" />
+    {% if buypid %}
+    <input type="hidden" name="buypid" value="{{ buypid }}" />
+    {% endif %}
 </form>
 <a href="/">Cancel</a>
 

templates/userlist.html

@@ -11,7 +11,7 @@
     {% for user in users %}
         {# Show an item per user, consisting of the username, and the avatar, linking to the touchkey login #}
         <div class="thumblist-item">
-            <a href="/touchkey?uid={{ user.id }}&username={{ user.name }}">
+            <a href="/touchkey?uid={{ user.id }}&username={{ user.name }}{% if buyproduct %}&buypid={{ buyproduct.id }}{% endif %}">
                 <span class="thumblist-title">{{ user.name }}</span><br/>
                 <div class="imgcontainer">
                     <img src="/static/upload/thumbnails/users/{{ user.id }}.png?cacheBuster={{ now }}" alt="Avatar of {{ user.name }}" draggable="false"/>
@@ -22,11 +22,21 @@
 
     <br/>
     {# Link to the password login #}
+    <div class="thumblist-item">
 	<a href="/login">Password login</a>
+    </div>
     {% if signup %}
+    <div class="thumblist-item">
 	<a href="/signup">Create account</a>
+    </div>
     {% endif %}
 
     {{ super() }}
 
 {% endblock %}
+
+{% block eanwebsocket %}
+  function (e) {
+  document.location = "?ean=" + e.data;
+  }
+{% endblock %}