Initial commit - existing project files

application/app/admin.py

@@ -0,0 +1,138 @@
+#
+
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin
+from django.views.decorators.cache import never_cache
+
+from .models import User
+from .models import Drink
+from .models import Order
+from .models import Global
+from .models import RegisterTransaction as Register
+
+from .forms import CustomUserChangeForm
+from .forms import CustomDrinkForm
+from .forms import CustomGlobalForm
+from .forms import CustomRegisterTransactionForm
+
+# Admin Site
+
+class CustomAdminSite(admin.AdminSite):
+
+    site_header = "Drinks Administration"
+    site_title = "Drinks Administration"
+    
+    @never_cache
+    def index(self, request, extra_context=None):
+
+        return super().index(request, extra_context={
+            "registerBalance": "{:10.2f}".format(
+                Global.objects.get(name="register_balance").value_float
+            ),
+            "admin_info": Global.objects.get(name="admin_info").value_string,
+            **(extra_context or {})
+        })
+
+adminSite = CustomAdminSite()
+
+
+# Register your models here.
+
+class CustomUserAdmin(UserAdmin):
+
+    model = User
+    form = CustomUserChangeForm
+
+    fieldsets_ = list((*UserAdmin.fieldsets,))
+    fieldsets_.insert(1, (
+            "Balance",
+            {"fields": ("balance", "allow_order_with_negative_balance")},
+        )
+    )
+    fieldsets = tuple(fieldsets_)
+
+    list_display = ["username", "balance", "is_active", "allow_order_with_negative_balance"]
+
+    def get_actions(self, request): # remove the "delete_selected" action because it breaks some functionality
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+
+adminSite.register(User, CustomUserAdmin)
+
+
+class CustomDrinkAdmin(admin.ModelAdmin):
+
+    model = Drink
+    form = CustomDrinkForm
+    list_display = ["product_name", "content_litres", "price", "available", "binary_availability", "deleted"]
+
+adminSite.register(Drink, CustomDrinkAdmin)
+
+
+class CustomRegisterAdmin(admin.ModelAdmin):
+
+    model = Register
+    form = CustomRegisterTransactionForm
+    site_title = "Register"
+    list_display = ["datetime", "transaction_sum", "user", "comment"]
+    actions = ["delete_selected_new"]
+
+    def get_actions(self, request): # remove the "delete_selected" action because it breaks some functionality
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+    
+    def delete_selected_new(self, request, queryset):
+        #print(queryset)
+        for supply in queryset:
+            #print(order)
+            supply.delete()
+        if queryset.count() < 2:
+            self.message_user(request, f"Revoked {queryset.count()} supply.")
+        else:
+            self.message_user(request, f"Revoked {queryset.count()} supplies.")
+    delete_selected_new.short_description = "Revoke selected transactions"
+
+
+adminSite.register(Register, CustomRegisterAdmin)
+
+
+class CustomOrderAdmin(admin.ModelAdmin):
+
+    model = Order
+    list_display = ["product_name", "amount", "price_sum", "user", "datetime"]
+    actions = ["delete_selected_new"]
+
+    def get_actions(self, request): # remove the "delete_selected" action because it breaks some functionality
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+
+    def delete_selected_new(self, request, queryset):
+        #print(queryset)
+        for order in queryset:
+            #print(order)
+            order.delete()
+        self.message_user(request, f"Revoked {queryset.count()} order(s).")
+    delete_selected_new.short_description = "Revoke selected orders"
+            
+adminSite.register(Order, CustomOrderAdmin)
+
+
+class CustomGlobalAdmin(admin.ModelAdmin):
+
+    model = Global
+    form = CustomGlobalForm
+    list_display = ["name", "value_float", "value_string"]
+
+    def get_actions(self, request): # remove the "delete_selected" action because it breaks some functionality
+        actions = super().get_actions(request)
+        if 'delete_selected' in actions:
+            del actions['delete_selected']
+        return actions
+
+adminSite.register(Global, CustomGlobalAdmin)

application/app/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+from django.contrib.admin.apps import AdminConfig
+
+
+class DAppConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'app'

application/app/context_processors.py

@@ -0,0 +1,16 @@
+from django.conf import settings
+
+from .models import Global
+
+def app_version(request):
+
+    try:
+        global_message = Global.objects.get(pk="global_message").value_string
+    except Global.DoesNotExist:
+        global_message = ""
+    
+    return {
+        "app_version": settings.APP_VERSION,
+        "currency_suffix": settings.CURRENCY_SUFFIX,
+        "global_message": global_message
+    }

application/app/forms.py

@@ -0,0 +1,47 @@
+
+from django import forms
+from django.conf import settings
+from django.contrib.auth.forms import UserChangeForm
+
+from .models import User
+from .models import Drink
+from .models import RegisterTransaction
+from .models import Global
+
+
+class CustomUserChangeForm(UserChangeForm):
+
+    balance = forms.DecimalField(max_digits=8, decimal_places=2, initial=0.00, label=f"Balance {settings.CURRENCY_SUFFIX}")
+
+    class Meta:
+        model = User
+        fields = ("username", "balance")
+
+
+class CustomDrinkForm(forms.ModelForm):
+
+    product_name = forms.CharField(max_length=64, label="Product Name")
+    content_litres = forms.DecimalField(max_digits=6, decimal_places=3, initial=0.5, label="Content (l)")
+    price = forms.DecimalField(max_digits=6, decimal_places=2, label=f"Price {settings.CURRENCY_SUFFIX}")
+
+    class Meta:
+        model = Drink
+        fields = ("product_name", "content_litres", "price", "binary_availability", "available", "deleted")
+
+
+class CustomRegisterTransactionForm(forms.ModelForm):
+
+    class Meta:
+        model = RegisterTransaction
+        fields = ("transaction_sum", "datetime", "is_user_deposit", "comment", "user")
+
+
+class CustomGlobalForm(forms.ModelForm):
+
+    comment = forms.CharField(widget=forms.Textarea, required=False)
+    value_float = forms.FloatField(initial=0.00)
+    value_string = forms.CharField(widget=forms.Textarea, required=False)
+
+    class Meta:
+        model = Global
+        fields = ("name", "comment", "value_float", "value_string")

application/app/models.py

@@ -0,0 +1,160 @@
+
+from django.db import models
+from django.conf import settings
+from django.contrib.auth.models import AbstractUser
+from django_currentuser.db.models import CurrentUserField
+from django.forms import ValidationError
+from django.utils import timezone
+
+
+# helper 
+
+def make_register_transaction(transaction_sum:float):
+    regbalance = Global.objects.get(name="register_balance")
+    regbalance.value_float += float(round(float(transaction_sum), 2))
+    regbalance.save()
+
+
+# Custom user model
+class User(AbstractUser):
+
+    balance = models.DecimalField(max_digits=8, decimal_places=2, default=0.00)
+    allow_order_with_negative_balance = models.BooleanField(default=False)
+
+    def delete(self, *args, **kwargs):
+        self.balance = 0
+        self.is_active = False
+        self.username = f"<deleted user #{self.pk}>"
+        self.last_name = ""
+        self.first_name = ""
+        self.email = ""
+        super().save()
+
+#
+
+
+class Drink(models.Model):
+
+    product_name = models.CharField(max_length=64)
+    content_litres = models.DecimalField(max_digits=6, decimal_places=3, default=0.5)
+    price = models.DecimalField(max_digits=6, decimal_places=2, default=0.00)
+    available = models.PositiveIntegerField(default=0)
+    deleted = models.BooleanField(default=False)
+
+    # when the following field is true:
+    # available > 0 -> there is a indefinetly amount of drinks left
+    # available < 1 -> there are no drinks left
+    binary_availability = models.BooleanField(default=False)
+
+    def delete(self, *args, **kwargs):
+        self.deleted = True
+        super().save()
+
+    def __str__(self): return f"{self.product_name} ({str(self.content_litres).rstrip('0')}l) - {self.price}{settings.CURRENCY_SUFFIX}"
+
+
+class RegisterTransaction(models.Model):
+
+    class Meta:
+        verbose_name = "register transaction"
+        verbose_name_plural = "register"
+    
+    transaction_sum = models.DecimalField(max_digits=6, decimal_places=2, default=0.00)
+    # the following original_transaction_sum is needed when need to be
+    # updated, but the old value needs to be known (field is hidden)
+    old_transaction_sum = models.DecimalField(max_digits=6, decimal_places=2, default=0.00)
+    datetime = models.DateTimeField(default=timezone.now)
+    is_user_deposit = models.BooleanField(default=False)
+    comment = models.TextField(default=" ")
+    user = CurrentUserField()
+
+    def save(self, *args, **kwargs):
+        if self._state.adding:
+            make_register_transaction(self.transaction_sum)
+            if self.is_user_deposit == True: # update user balance
+                self.user.balance += self.transaction_sum
+                self.user.save()
+            self.old_transaction_sum = self.transaction_sum
+            super().save(*args, **kwargs)
+        else:
+            # update register transaction
+            sum_diff = self.transaction_sum - self.old_transaction_sum
+            make_register_transaction(sum_diff)
+            # update user balance
+            if self.is_user_deposit == True:
+                ub_sum_diff = self.transaction_sum - self.old_transaction_sum
+                self.user.balance += ub_sum_diff
+                self.user.save()
+            self.old_transaction_sum = self.transaction_sum
+            super().save(*args, **kwargs)
+    
+    def delete(self, *args, **kwargs):
+        make_register_transaction(-self.transaction_sum)
+        # update user deposit
+        if self.is_user_deposit:
+            self.user.balance -= self.transaction_sum
+            self.user.save()
+        super().delete(*args, kwargs)
+
+    def __str__(self): return f"{self.transaction_sum}{settings.CURRENCY_SUFFIX} by {self.user}"
+
+
+class Order(models.Model):
+
+    drink = models.ForeignKey(
+        "Drink",
+        on_delete=models.SET_NULL,
+        null=True,
+        limit_choices_to=models.Q(available__gt=0) # Query only those drinks with a availability greater than (gt) 0
+    )
+    user = CurrentUserField()
+    datetime = models.DateTimeField(default=timezone.now)
+    amount = models.PositiveIntegerField(default=1, editable=False)
+
+    # the following fields will be set automatically
+    # won't use foreign key, because the values of the foreign objects may change over time.
+    product_name = models.CharField(max_length=64, editable=False)
+    price_sum = models.DecimalField(max_digits=6, decimal_places=2, default=0, editable=False)
+    content_litres = models.DecimalField(max_digits=6, decimal_places=3, default=0, editable=False)
+
+    # TODO: Add more comments on how and why the save & delete functions are implemented
+    # address this in a refactoring issue.
+
+    def save(self, *args, **kwargs):
+        drink = Drink.objects.get(pk=self.drink.pk)
+        if self._state.adding and drink.available > 0:
+            if not drink.binary_availability:
+                drink.available -= self.amount
+                drink.save()
+            self.product_name = drink.product_name
+            self.price_sum = drink.price * self.amount
+            self.content_litres = drink.content_litres
+            self.user.balance -= self.price_sum
+            self.user.save()
+            super().save(*args, **kwargs)
+        else:
+            raise ValidationError("This entry can't be changed.")
+    
+    def delete(self, *args, **kwargs):
+        self.user.balance += self.price_sum
+        self.user.save()
+        drink = Drink.objects.get(pk=self.drink.pk)
+        if not drink.binary_availability:
+            drink.available += self.amount
+            drink.save()
+        super().delete(*args, **kwargs)
+
+    def __str__(self): return f"{self.drink.product_name} ({str(self.drink.content_litres).rstrip('0')}l) x {self.amount} - {self.price_sum}{settings.CURRENCY_SUFFIX}"
+
+
+class Global(models.Model):
+
+    # this contains global values that are generated/calculated by code
+    # e.g. the current balance of the register, ...
+
+    name = models.CharField(max_length=42, unique=True, primary_key=True)
+    comment = models.TextField()
+    value_float = models.FloatField(default=0.00)
+    value_string = models.TextField()
+
+    def __str__(self): return self.name

application/app/sql_queries.py

@@ -0,0 +1,137 @@
+#from datetime import datetime
+
+from django.conf import settings
+from django.db import connection
+
+
+def _select_from_db(sql_select:str):
+    result = None
+    with connection.cursor() as cursor:
+        cursor.execute(sql_select)
+        result = cursor.fetchall()
+    return result
+
+
+def select_history(user, language_code="en") -> list:
+    # select order history and deposits
+    user_id = user.pk
+    result = _select_from_db(f"""
+    select
+        concat(
+        product_name, ' (',
+        content_litres::real, -- converting to real removes trailing zeros
+        'l) x ', amount, ' - ', price_sum, '{settings.CURRENCY_SUFFIX}') as "text",
+        datetime
+    from app_order
+    where user_id = {user_id}
+
+    union 
+
+    select
+        concat('Deposit: +', transaction_sum, '{settings.CURRENCY_SUFFIX}') as "text",
+        datetime
+    from app_userdeposits_view
+    where user_id = {user_id}
+
+    order by datetime desc
+    fetch first 30 rows only;
+    """)
+    result = [list(row) for row in result]
+    if language_code == "de": # reformat for german translation
+        for row in result:
+            row[0] = row[0].replace(".", ",")
+    return result
+
+
+def select_yopml12m(user) -> list:
+    # number of orders per month (last 12 months)
+    # only for the specified user
+    user_id = user.pk
+    result = _select_from_db(f"""
+        -- select the count of the orders per month (last 12 days)
+        select
+            to_char(date_trunc('month', datetime), 'YYYY-MM') as "month",
+            sum(amount) as "count"
+        from app_order
+            where user_id = {user_id}
+            and date_trunc('month', datetime) > date_trunc('month', now() - '12 months'::interval)
+        group by "month"
+        order by "month" desc;
+    """)
+    return [list(row) for row in result]
+
+def select_aopml12m() -> list:
+    # number of orders per month (last 12 months)
+    result = _select_from_db(f"""
+        -- select the count of the orders per month (last 12 days)
+        select
+            to_char(date_trunc('month', datetime), 'YYYY-MM') as "month",
+            sum(amount) as "count"
+        from app_order
+            where date_trunc('month', datetime) > date_trunc('month', now() - '12 months'::interval)
+        group by "month"
+        order by "month" desc;
+    """)
+    return [list(row) for row in result]
+
+
+def select_yopwd(user) -> list:
+    # number of orders per weekday (all time)
+    # only for the specified user
+    user_id = user.pk
+    result = _select_from_db(f"""
+        -- select the count of the orders per weekday (all time)
+        select
+            to_char(datetime, 'Day') as "day",
+            sum(amount) as "count"
+        from app_order
+            where user_id = {user_id}
+        group by "day"
+        order by "count" desc;
+    """)
+    return [list(row) for row in result]
+    return []
+
+def select_aopwd() -> list:
+    # number of orders per weekday (all time)
+    result = _select_from_db(f"""
+        -- select the count of the orders per weekday (all time)
+        select
+            to_char(datetime, 'Day') as "day",
+            sum(amount) as "count"
+        from app_order
+        group by "day"
+        order by "count" desc;
+    """)
+    return [list(row) for row in result]
+    return []
+
+
+def select_noyopd(user) -> list:
+    # number of orders per drink (all time)
+    # only for specified user
+    user_id = user.pk
+    result = _select_from_db(f"""
+        select
+            d.product_name as "label",
+            sum(o.amount) as "data"
+        from app_drink d
+            join app_order o on (d.id = o.drink_id)
+        where o.user_id = {user_id}
+        group by d.product_name
+        order by "data" desc;
+    """)
+    return [list(row) for row in result]
+
+def select_noaopd() -> list:
+    # number of orders per drink (all time)
+    result = _select_from_db(f"""
+        select
+            d.product_name as "label",
+            sum(o.amount) as "data"
+        from app_drink d
+            join app_order o on (d.id = o.drink_id)
+        group by d.product_name
+        order by "data" desc;
+    """)
+    return [list(row) for row in result]

application/app/templates/admin/base_site.html

@@ -0,0 +1,18 @@
+{% extends "admin/base.html" %}
+
+{% block title %}
+{% if subtitle %}
+{{ subtitle }} | 
+{% endif %}
+{{ title }} | {{ site_title|default:_('Django site admin') }}
+{% endblock %}
+
+{% block extrahead %}
+    <link rel="shortcut icon" href="/static/favicon.png" sizes="480x480" />
+{% endblock %}
+
+{% block branding %}
+<h1 id="site-name"><a href="{% url 'admin:index' %}">{{ site_header|default:_('Django administration') }}</a></h1>
+{% endblock %}
+
+{% block nav-global %}{% endblock %}

application/app/templates/admin/index.html

@@ -0,0 +1,19 @@
+{% extends "admin/index.html" %}
+
+{% block sidebar %}
+
+    {{ block.super }}
+
+    <div>
+        <div>
+            <p>Current Register Balance: {{ registerBalance }}{{ currency_suffix }}</p>
+            {% if global_message != "" %}
+                <p>Global Message: {{ global_message }}</p>
+            {% endif %}
+            {% if admin_info != "" %}
+                <p>Admin Info: {{ admin_info }}</p>
+            {% endif %}
+        </div>
+    </div>
+
+{% endblock %}

application/app/templates/baseLayout.html

@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+
+{% load i18n %}
+
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=0.95">
+    <link rel="stylesheet" href="/static/css/main.css">
+    <link rel="shortcut icon" href="/static/favicon.png" sizes="480x480" />
+    <title>{% block title %}{% endblock %}</title>
+    {% block headAdditional %}{% endblock %}
+</head>
+
+<body>
+
+    <div class="baseLayout">
+
+        {% include "globalMessage.html" %}
+
+        {% if user.is_authenticated %}
+
+        <div class="userPanel">
+            {% include "userPanel.html" %}
+        </div>
+
+        {% endif %}
+
+        <main>
+
+            {% if user.is_authenticated or "accounts/login/" in request.path or "accounts/logout/" in request.path %}
+
+                <h1>{% block heading %}{% endblock %}</h1>
+                <div class="content">
+                    {% block content %}{% endblock %}
+                </div>
+
+            {% else %}
+
+                <div class="centeringFlex">
+                    {% translate "An error occured. Please log out and log in again." %}
+                    <br>
+                    <a href="/accounts/logout">log out</a>
+                </div>
+
+            {% endif %}
+
+        </main>
+
+        {% include "footer.html" %}
+
+    </div>
+
+    <script src="/static/js/main.js"></script>
+
+</body>
+</html>

application/app/templates/deposit.html

@@ -0,0 +1,39 @@
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - Deposit" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/deposit.css">
+{% endblock %}
+
+{% block heading %}
+    {% translate "Deposit" %}
+{% endblock %}
+
+{% block content %}
+
+    <form id="depositForm">
+        {% csrf_token %}
+
+        <div class="row">
+            <div class="column">{% translate "Amount" %} {{ currency_suffix }}:</div>
+            <div class="column"><input type="number" name="depositAmount" id="depositAmount" max="9999.99" min="1.00"
+                 step="0.01" autofocus></div>
+        </div>
+
+        <div id="statusInfo"></div>
+
+        <div class="horizontalButtonList">
+            <a href="/" class="button">{% translate "cancel" %}</a>
+            <input type="submit" id="depositSubmitBtn" class="button" value='{% translate "confirm" %}'>
+        </div>
+
+    </form>
+
+    <script src="/static/js/deposit.js"></script>
+   
+{% endblock %}

application/app/templates/footer.html

@@ -0,0 +1,6 @@
+{% load i18n %}
+
+<div class="footer">
+    <div>Version {{ app_version }}</div>
+    <div>Copyright (C) 2021, <a href="https://gitlab.com/W13R">Julian Müller (W13R)</a></div>
+</div>

application/app/templates/globalMessage.html

@@ -0,0 +1,5 @@
+{% if global_message != "" %}
+<div class="globalMessage">
+    <div>{{ global_message }}</div>
+</div>
+{% endif %}

application/app/templates/history.html

@@ -0,0 +1,36 @@
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - History" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/history.css">
+{% endblock %}
+
+{% block heading %}
+    {% translate "History" %}
+{% endblock %}
+
+{% block content %}
+
+    {% if history %}
+        <table class="history">
+            <tr>
+                <th>{% translate "last 30 actions" %}</th>
+                <th></th>
+            </tr>
+            {% for h in history %}
+                <tr>
+                    <td>{{ h.0 }}</td>
+                    <td class="historyDate">{{ h.1 }}</td>
+                </tr>
+            {% endfor %}
+        </table>
+    {% else %}
+        {% translate "No history." %}
+    {% endif %}
+        
+{% endblock %}

application/app/templates/index.html

@@ -0,0 +1,47 @@
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - Home" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/index.css">
+{% endblock %}
+
+{% block heading %}
+    {% translate "Available Drinks" %}
+{% endblock %}
+
+{% block content %}
+
+    {% if available_drinks %}
+
+        <ul class="availableDrinksList">
+            {% for drink in available_drinks %}
+                {% if drink.binary_availability %}
+                    <li>
+                        <a class="button" href="/order/{{ drink.id }}">
+                            <span>{{ drink }}</span>
+                            <span>{% translate "available" %}</span>
+                        </a>
+                    </li>
+                {% else %}
+                    <li>
+                        <a class="button" href="/order/{{ drink.id }}">
+                            <span>{{ drink }}</span>
+                            <span>{{ drink.available }} {% translate "available" %}</span>
+                        </a>
+                    </li>
+                {% endif %}
+            {% endfor %}
+        </ul>
+    
+    {% else %}
+
+        {% translate "No drinks available." %}
+            
+    {% endif %}
+
+{% endblock %}

application/app/templates/order.html

@@ -0,0 +1,99 @@
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+{% translate "Drinks - Order" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/order.css">
+    <link rel="stylesheet" href="/static/css/customNumberInput.css">
+{% endblock %}
+
+{% block heading %}
+    {% translate "Order" %}
+{% endblock %}
+    
+{% block content %}
+
+    {% if drink and drink.available > 0 and not drink.deleted %}
+    
+        {% if user.balance > 0 or user.allow_order_with_negative_balance %}
+
+            <form id="orderForm">
+                {% csrf_token %}
+
+                <div class="row">
+                    <div class="column">{% translate "Drink" %}:</div>
+                    <div class="column">{{ drink.product_name }}</div>
+                </div>
+
+                <div class="row">
+                    <div class="column">{% translate "Price per Item" %} ({{ currency_suffix }}):</div>
+                    <div class="column" id="pricePerDrink" data-drink-price="{{ drink.price }}">{{ drink.price }}</div>
+                </div>
+
+                {% if not drink.binary_availability %}
+                <div class="row">
+                    <div class="column">{% translate "Available" %}:</div>
+                    <div class="column">{{ drink.available }}</div>
+                </div>
+                {% endif %}
+
+                <div class="row">
+                    <div class="column">{% translate "Count" %}:</div>
+                    <div class="column">
+                        <span class="customNumberInput">
+                            <button type="button" class="customNumberInput-minus" id="numberOfDrinksBtnA">-</button>
+                            {% if drink.binary_availability %}
+                            <input type="number" class="customNumberInputField" name="numberOfDrinks" id="numberOfDrinks"
+                                min="1" max="100" value="1">
+                            {% else %}
+                            <input type="number" class="customNumberInputField" name="numberOfDrinks" id="numberOfDrinks"
+                                max="{{ drink.available }}" min="1" max="100" value="1">
+                            {% endif %}
+                            <button type="button" class="customNumberInput-plus" id="numberOfDrinksBtnB">+</button>
+                        </span>
+                    </div>
+                </div>
+
+                <div class="row">
+                    <div class="column">{% translate "Sum" %} ({{ currency_suffix }}):</div>
+                    <div class="column" id="orderCalculatedSum">{{ drink.price }}</div>
+                </div>
+                    
+                <div id="statusInfo"></div>
+
+                <input type="hidden" name="drinkID" id="drinkID" value="{{ drink.id }}">
+
+                <div class="horizontalButtonList">
+                    <a href="/" class="button">{% translate "cancel" %}</a>
+                    <input type="submit" id="orderSubmitBtn" class="button" value='{% translate "order" %}'>
+                </div>
+
+            </form>
+
+
+            <script src="/static/js/order.js"></script>
+            <script src="/static/js/customNumberInput.js"></script>
+
+        {% else %}
+
+            <div class="centeringFlex">
+                <p>{% translate "You can't order this, because you have a negative balance." %}</p>
+                <a href="/">{% translate "back" %}</a>
+            </div>
+
+        {% endif %}            
+
+    {% else %}
+
+    <div class="centeringFlex">
+        <p>{% translate "This drink is not available." %}</p>
+        <a href="/">{% translate "back" %}</a>
+    </div>
+
+    {% endif %}
+
+{% endblock %}

application/app/templates/registration/logged_out.html

@@ -0,0 +1,24 @@
+
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - Logged Out" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/login.css">
+{% endblock %}
+
+{% block content %}
+
+    <div class="centeringFlex">
+        {% translate "Logged out! You will be redirected shortly." %}
+        <br><br>
+        <a href="/">{% translate "Click here if automatic redirection does not work." %}</a>
+    </div>
+
+    <script src="/static/js/logged_out.js"></script>
+
+{% endblock %}

application/app/templates/registration/login.html

@@ -0,0 +1,91 @@
+
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - Login" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/login.css">
+{% endblock %}
+
+{% block content %}
+
+    {% if error_message %}
+        <p class="errorText">{{ error_message }}</p>
+    {% endif %}
+
+    <div class="passwordOverlayContainer nodisplay" id="passwordOverlayContainer">
+            
+        <div class="passwordOverlay">
+
+            <form method="post" action="{% url 'login' %}">
+                {% csrf_token %}
+                <h1>{% translate "Log in" %}</h1>
+                <input type="text" name="username" autofocus="" autocapitalize="none" autocomplete="username" maxlength="150" required="" id="id_username">
+                <input type="password" name="password" autocomplete="current-password" required="" id="id_password" placeholder='{% translate "Password/PIN" %}'>
+
+                <div class="pinpad">
+                    <table>
+                        <tr>
+                            <td><button type="button" class="pinpadBtn" data-btn="1">1</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="2">2</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="3">3</button></td>
+                        </tr>
+                        <tr>
+                            <td><button type="button" class="pinpadBtn" data-btn="4">4</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="5">5</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="6">6</button></td>
+                        </tr>
+                        <tr>
+                            <td><button type="button" class="pinpadBtn" data-btn="7">7</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="8">8</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="9">9</button></td>
+                        </tr>
+                        <tr>
+                            <td><button type="button" class="pinpadBtn" data-btn="0">0</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="x">x</button></td>
+                            <td><button type="button" class="pinpadBtn" data-btn="enter">&#9166;</button></td>
+                        </tr>
+                    </table>
+                </div>
+
+                <div class="horizontalButtonList">
+                    <button type="button" id="pwoCancel">{% translate "cancel" %}</button>
+                    <input class="button" id="submit_login" type="submit" value='{% translate "login" %}' />
+                </div>
+            
+            </form>
+
+        </div>
+    </div>
+
+    <h1>{% translate "Choose your account" %}</h1>
+
+    <div class="userlistContainer">
+        <ul class="userlist">
+            {% for user_ in user_list %}
+                <li class="userlistButton button" data-username="{{ user_.username }}">
+                        
+                    {% if user_.first_name %}
+
+                        {{ user_.first_name }}
+
+                        {% if user_.last_name %}
+                            {{ user_.last_name }}
+                        {% endif %}
+
+                    {% else %}
+                        {{ user_.username }}
+                    {% endif %}
+
+                </li>
+            {% endfor %}
+        </ul>
+    </div>
+
+    <script src="/static/js/login.js"></script>
+
+{% endblock %}

application/app/templates/statistics.html

@@ -0,0 +1,179 @@
+{% extends "baseLayout.html" %}
+
+{% load i18n %}
+
+{% block title %}
+    {% translate "Drinks - Statistics" %}
+{% endblock %}
+
+{% block headAdditional %}
+    <link rel="stylesheet" href="/static/css/statistics.css">
+{% endblock %}
+
+
+{% block heading %}
+    {% translate "Statistics" %}
+{% endblock %}
+
+
+{% block content %}
+
+    <div class="mainContainer">
+
+        <div class="dropDownMenu" id="statisticsDropDownMenu">
+            <button class="dropDownButton" id="statisticsDropDownMenuButton">
+                <div>
+                    {% translate "Choose" %}
+                </div>
+            </button>
+            <div class="dropDownList">
+                <button class="sChoice dropDownChoice" data-statistics_div="noyopd">
+                    {% translate "Your orders per drink" %}
+                </button>
+                <button class="sChoice dropDownChoice" data-statistics_div="yopwd">
+                    {% translate "Your orders per weekday" %}
+                </button>
+                <button class="sChoice dropDownChoice" data-statistics_div="yopml12m">
+                    {% translate "Your orders per month (last 12 months)" %}
+                </button>
+                <button class="sChoice dropDownChoice" data-statistics_div="noaopd">
+                    {% translate "All orders per drink" %}
+                </button>
+                <button class="sChoice dropDownChoice" data-statistics_div="aopwd">
+                    {% translate "All orders per weekday" %}
+                </button>
+                <button class="sChoice dropDownChoice" data-statistics_div="aopml12m">
+                    {% translate "All orders per month (last 12 months)" %}
+                </button>
+            </div>
+        </div>
+
+        <div class="tablesContainer">
+
+            <div id="noyopd" class="statisticsTable nodisplay">
+                <h1>{% translate "Your orders per drink" %}</h1>
+                {% if noyopd %}
+                <table>
+                    <tr>
+                        <th>{% translate "drink" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in noyopd %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+
+            <div id="noaopd" class="statisticsTable nodisplay">
+                <h1>{% translate "All orders per drink" %}</h1>
+                {% if noaopd %}
+                <table>
+                    <tr>
+                        <th>{% translate "drink" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in noaopd %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+    
+            <div id="yopml12m" class="statisticsTable nodisplay">
+                <h1>{% translate "Your orders per month (last 12 months)" %}</h1>
+                {% if yopml12m %}
+                <table>
+                    <tr>
+                        <th>{% translate "month" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in yopml12m %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+
+            <div id="aopml12m" class="statisticsTable nodisplay">
+                <h1>{% translate "All orders per month (last 12 months)" %}</h1>
+                {% if aopml12m %}
+                <table>
+                    <tr>
+                        <th>{% translate "month" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in aopml12m %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+
+            <div id="yopwd" class="statisticsTable nodisplay">
+                <h1>{% translate "Your orders per weekday" %}</h1>
+                {% if yopwd %}
+                <table>
+                    <tr>
+                        <th>{% translate "day" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in yopwd %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+
+            <div id="aopwd" class="statisticsTable nodisplay">
+                <h1>{% translate "All orders per weekday" %}</h1>
+                {% if aopwd %}
+                <table>
+                    <tr>
+                        <th>{% translate "day" %}</th>
+                        <th>{% translate "count" %}</th>
+                    </tr>
+                    {% for row in aopwd %}
+                    <tr>
+                        <td>{{ row.0 }}</td>
+                        <td>{{ row.1 }}</td>
+                    </tr>
+                    {% endfor %}
+                </table>
+                {% else %}
+                <div>{% translate "No history." %}</div>
+                {% endif %}
+            </div>
+
+        </div>
+
+    </div>
+
+    <script src="/static/js/statistics.js"></script>
+
+{% endblock %}

application/app/templates/userPanel.html

@@ -0,0 +1,31 @@
+{% load i18n %}
+
+<div class="dropDownMenu" id="dropDownMenu">
+    <button class="dropDownButton" id="dropDownMenuButton">
+        <div>
+            {% if user.first_name != "" %}
+                {% translate "User" %}: {{ user.first_name }} {{ user.last_name }} ({{ user.username }})
+            {% else %}
+                {% translate "User" %}: {{ user.username }}
+            {% endif %}
+            &nbsp;-&nbsp;
+            {% if user.balance < 0.01 %}
+                <span class="userBalanceWarn">{% translate "Balance" %}: {{ user.balance }}{{ currency_suffix }}</span>
+            {% else %}
+                <span>{% translate "Balance" %}: {{ user.balance }}{{ currency_suffix }}</span>
+            {% endif %}
+        </div>
+    </button>
+    <div class="dropDownList">
+        <a class="button dropDownChoice" id="navBarBtnHome" href="/">Home</a>
+        <a class="button dropDownChoice" id="navBarBtnHistory" href="/history">{% translate "History" %}</a>
+        <a class="button dropDownChoice" id="navBarBtnStatistics" href="/statistics">{% translate "Statistics" %}</a>
+        <a class="button dropDownChoice" id="navBarBtnDeposit" href="/deposit">{% translate "Deposit" %}</a>
+        {% if user.is_superuser %}
+            <a class="button dropDownChoice" href="/admin/">Admin Panel</a>
+        {% else %}
+        <a class="button dropDownChoice" href="/accounts/password_change/">{% translate "Change Password" %}</a>
+        {% endif %}
+        <a class="button dropDownChoice" href="/accounts/logout">{% translate "Logout" %}</a>
+    </div>
+</div>

application/app/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

application/app/urls.py

@@ -0,0 +1,22 @@
+from django.urls import path, include
+from django.contrib.auth import views as auth_views
+
+from . import views
+from .admin import adminSite
+
+urlpatterns = [
+    path('', views.index),
+    path('order/<drinkID>/', views.order),
+    path('history/', views.history),
+    path('deposit/', views.deposit),
+    path('statistics/', views.statistics),
+    path('accounts/login/', views.login_page, name="login"),
+    path('accounts/logout/', auth_views.LogoutView.as_view(), name='logout'),
+    path('accounts/password_change/', auth_views.PasswordChangeView.as_view(), name='password_change'),
+    path('accounts/password_change_done/', views.redirect_home, name='password_change_done'),
+    path('admin/', adminSite.urls),
+    # API #
+    path('api/order-drink', views.api_order_drink),
+    path('api/deposit', views.api_deposit),
+    #path('api/get-statistics', views.api_get_statistics)
+]

application/app/views.py

@@ -0,0 +1,167 @@
+import json
+import sys
+
+from django.contrib.auth import authenticate
+from django.contrib.auth import get_user_model
+from django.contrib.auth import login
+from django.contrib.auth.decorators import login_required
+from django.contrib.auth.forms import AuthenticationForm
+from django.http.response import HttpResponseRedirect
+from django.http.response import HttpResponse
+from django.shortcuts import render
+
+from django.utils.translation import gettext as _
+
+from django.utils.formats import decimal
+
+from . import sql_queries
+
+from .models import Drink
+from .models import Order
+from .models import RegisterTransaction
+
+
+# login view
+
+
+def login_page(request):
+
+    userlist = get_user_model().objects.filter(is_superuser=False).filter(is_active=True).order_by("username")
+
+    if request.method == "POST":
+
+        form = AuthenticationForm(request.POST)
+        username = request.POST['username']
+        password = request.POST['password']
+
+        user = authenticate(username=username,password=password)
+
+        if user:
+            if user.is_active:
+                login(request, user)
+                return HttpResponseRedirect("/")
+        else:
+            return render(request,'registration/login.html', {
+                "form": form,
+                "user_list": userlist,
+                "error_message": _("Invalid username or password.")
+            })
+         
+    else:
+        
+        if request.user.is_authenticated:
+            return HttpResponseRedirect("/")
+        
+        form = AuthenticationForm()
+
+    return render(request,'registration/login.html', {
+        "form": form,
+        "user_list": userlist
+    })
+
+
+# actual application
+
+@login_required
+def index(request):
+    context = {
+        "available_drinks": Drink.objects.filter(available__gt=0).filter(deleted=False),
+    }
+    return render(request, "index.html", context)
+
+@login_required
+def history(request):
+    context = {
+        "history": sql_queries.select_history(request.user, language_code=request.LANGUAGE_CODE),
+    }
+    return render(request, "history.html", context)
+
+@login_required
+def order(request, drinkID):
+    try:
+        drink_ = Drink.objects.get(pk=drinkID)
+        context = {
+            "drink": drink_
+        }
+        return render(request, "order.html", context)
+    except Drink.DoesNotExist:
+        return HttpResponseRedirect("/")
+
+@login_required
+def deposit(request):
+    return render(request, "deposit.html", {})
+
+@login_required
+def statistics(request):
+    context = {
+        "yopml12m": sql_queries.select_yopml12m(request.user),
+        "aopml12m": sql_queries.select_aopml12m(),
+        "yopwd": sql_queries.select_yopwd(request.user),
+        "aopwd": sql_queries.select_aopwd(),
+        "noyopd": sql_queries.select_noyopd(request.user),
+        "noaopd": sql_queries.select_noaopd()
+    }
+    return render(request, "statistics.html", context)
+
+@login_required
+def redirect_home(request):
+    return HttpResponseRedirect("/")
+
+
+# API for XHR requests #
+
+@login_required
+def api_order_drink(request):
+
+    # check request -> make order
+
+    user = request.user
+
+    try:
+
+        if user.allow_order_with_negative_balance or user.balance > 0:
+
+            drinkID = int(request.POST["drinkID"])
+            amount = int(request.POST["numberOfDrinks"])
+
+            drink = Drink.objects.get(pk=drinkID)
+
+            if ((drink.binary_availability and drink.available > 0) or (drink.available >= amount)) and not drink.deleted:
+                Order.objects.create(drink=drink, user=user, amount=amount)
+                return HttpResponse("success", status=200)
+            else:
+                return HttpResponse("notAvailable", status=400)
+        
+        else: raise Exception("Balance below zero.")
+
+    except Exception as e:
+        print(f"An exception occured while processing an order: User: {user.username} - Exception: {e}", file=sys.stderr)
+        return HttpResponse(b"", status=500)
+
+
+@login_required
+def api_deposit(request):
+
+    # check request -> deposit
+
+    user = request.user
+
+    try:
+
+        amount = decimal.Decimal(request.POST["depositAmount"])
+
+        if 0.00 < amount < 9999.99:
+            # create transaction
+            RegisterTransaction.objects.create(
+                transaction_sum=amount,
+                comment=f"User deposit by user {user.username}",
+                is_user_deposit=True,
+                user=user
+            )
+            #
+            return HttpResponse("success", status=200)
+        else: raise Exception("Deposit amount too big or small.")
+    
+    except Exception as e:
+        print(f"An exception occured while processing an transaction: User: {user.username} - Exception: {e}", file=sys.stderr)
+        return HttpResponse(b"", status=500)

application/drinks_manager/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for drinks_manager project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.2/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drinks_manager.settings')
+
+application = get_asgi_application()

application/drinks_manager/settings.py

@@ -0,0 +1,183 @@
+"""
+Django settings for drinks_manager project.
+
+Generated by 'django-admin startproject' using Django 3.2.5.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/3.2/ref/settings/
+"""
+
+import os
+
+from pathlib import Path
+
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key secret!
+django_secret_key_absolute_fp = os.environ["DJANGO_SK_ABS_FP"]
+with open(django_secret_key_absolute_fp) as secret_key_file:
+    SECRET_KEY = secret_key_file.read().strip()
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = (os.environ["DJANGO_DEBUG"].lower() == "true")
+
+
+ALLOWED_HOSTS = [
+    "*"
+]
+
+
+### CSP Configuration ###
+
+
+CSP_DEFAULT_SRC = ("'self'", )
+
+
+### ----------------- ###
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    "app.apps.DAppConfig",
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    "django.middleware.locale.LocaleMiddleware",
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    "django_currentuser.middleware.ThreadLocalUserMiddleware",
+    "csp.middleware.CSPMiddleware"
+]
+
+ROOT_URLCONF = 'drinks_manager.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+                "app.context_processors.app_version"
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'drinks_manager.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/3.2/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql_psycopg2',
+        'NAME': os.environ["PGDB_DB"],
+        'USER': os.environ["PGDB_USER"],
+        'PASSWORD': os.environ["PGDB_PASSWORD"],
+        'HOST': os.environ["PGDB_HOST"],
+        'PORT': str(os.environ["PGDB_PORT"])
+    }
+}
+
+CONN_MAX_AGE = 20 # keep database connections alive for n seconds
+
+
+# Password validation
+# https://docs.djangoproject.com/en/3.2/ref/settings/#auth-password-validators
+
+if os.environ["DJANGO_ENABLE_PASSWORD_VALIDATION"].lower() == "true":
+    AUTH_PASSWORD_VALIDATORS = [
+        {
+            'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+        },
+        {
+            'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+        },
+        {
+            'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+        },
+        {
+            'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+        },
+    ]
+else:
+    AUTH_PASSWORD_VALIDATORS = []
+
+
+AUTH_USER_MODEL = "app.User"
+
+# user will be logged out after x seconds
+SESSION_COOKIE_AGE = int(os.environ["DJANGO_SESSION_COOKIE_AGE"])
+
+
+# more security settings
+
+CSRF_COOKIE_SECURE = True
+SESSION_COOKIE_SECURE = True
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/3.2/topics/i18n/
+
+LANGUAGE_CODE = os.environ["DJANGO_LANGUAGE_CODE"] # this is the default and fallback language (currently only de-de and en-us supported)
+
+TIME_ZONE = os.environ["DJANGO_TIME_ZONE"]
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+LOCALE_PATHS = [
+    BASE_DIR / "locale"
+]
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/3.2/howto/static-files/
+
+STATIC_URL = '/static/'
+STATIC_ROOT = os.environ["STATIC_FILES"]
+
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+#
+
+APP_VERSION = os.environ["APP_VERSION"]
+
+try:
+    CURRENCY_SUFFIX = os.environ["CURRENCY_SUFFIX"]
+except KeyError:
+    CURRENCY_SUFFIX = "$"

application/drinks_manager/urls.py

@@ -0,0 +1,21 @@
+"""drinks_manager URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/3.2/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+
+from django.urls import path, include
+
+urlpatterns = [
+    path('', include("app.urls"))
+]

application/drinks_manager/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for drinks_manager project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drinks_manager.settings')
+
+application = get_wsgi_application()

application/locale/de/LC_MESSAGES/django.po

@@ -0,0 +1,241 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2021-12-22 11:07+0100\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+#: app/templates/admin/base_site.html:7
+msgid "Django site admin"
+msgstr "Django Administrator"
+
+#: app/templates/admin/base_site.html:15
+msgid "Django administration"
+msgstr "Django Administration"
+
+#: app/templates/baseLayout.html:43
+msgid "An error occured. Please log out and log in again."
+msgstr "Ein Fehler ist aufgetreten. Bitte ab- und wieder anmelden."
+
+#: app/templates/deposit.html:6
+msgid "Drinks - Deposit"
+msgstr "Getränke - Einzahlen"
+
+#: app/templates/deposit.html:14 app/templates/userPanel.html:23
+msgid "Deposit"
+msgstr "Einzahlen"
+
+#: app/templates/deposit.html:23
+msgid "Amount"
+msgstr "Summe"
+
+#: app/templates/deposit.html:31 app/templates/order.html:71
+#: app/templates/registration/login.html:56
+msgid "cancel"
+msgstr "Abbrechen"
+
+#: app/templates/deposit.html:32
+msgid "confirm"
+msgstr "Bestätigen"
+
+#: app/templates/history.html:6
+msgid "Drinks - History"
+msgstr "Getränke - Verlauf"
+
+#: app/templates/history.html:14 app/templates/userPanel.html:21
+msgid "History"
+msgstr "Verlauf"
+
+#: app/templates/history.html:22
+msgid "last 30 actions"
+msgstr "letzte 30 Vorgänge"
+
+#: app/templates/history.html:33 app/templates/statistics.html:69
+#: app/templates/statistics.html:89 app/templates/statistics.html:109
+#: app/templates/statistics.html:129 app/templates/statistics.html:149
+#: app/templates/statistics.html:169
+msgid "No history."
+msgstr "Kein Verlauf verfügbar."
+
+#: app/templates/index.html:6
+msgid "Drinks - Home"
+msgstr "Getränke - Home"
+
+#: app/templates/index.html:14
+msgid "Available Drinks"
+msgstr "Verfügbare Getränke"
+
+#: app/templates/index.html:27 app/templates/index.html:34
+msgid "available"
+msgstr "verfügbar"
+
+#: app/templates/index.html:43
+msgid "No drinks available."
+msgstr "Es sind gerade keine Getränke verfügbar."
+
+#: app/templates/order.html:6
+msgid "Drinks - Order"
+msgstr "Getränke - Bestellen"
+
+#: app/templates/order.html:15
+msgid "Order"
+msgstr "Bestellung"
+
+#: app/templates/order.html:28
+msgid "Drink"
+msgstr "Getränk"
+
+#: app/templates/order.html:33
+msgid "Price per Item"
+msgstr "Preis pro Getränk"
+
+#: app/templates/order.html:39
+msgid "Available"
+msgstr "Verfügbar"
+
+#: app/templates/order.html:45
+msgid "Count"
+msgstr "Anzahl"
+
+#: app/templates/order.html:62
+msgid "Sum"
+msgstr "Summe"
+
+#: app/templates/order.html:72
+msgid "order"
+msgstr "Bestellen"
+
+#: app/templates/order.html:84
+msgid "You can't order this, because you have a negative balance."
+msgstr ""
+"Sie können momentan keine Bestellungen aufgeben, da Sie einen negativen "
+"Saldo haben."
+
+#: app/templates/order.html:85 app/templates/order.html:94
+msgid "back"
+msgstr "zurück"
+
+#: app/templates/order.html:93
+msgid "This drink is not available."
+msgstr "Dieses Getränk ist gerade nicht verfügbar."
+
+#: app/templates/registration/logged_out.html:7
+msgid "Drinks - Logged Out"
+msgstr "Getränke - Abgemeldet"
+
+#: app/templates/registration/logged_out.html:17
+msgid "Logged out! You will be redirected shortly."
+msgstr "Sie wurden abgemeldet und werden in Kürze weitergeleitet."
+
+#: app/templates/registration/logged_out.html:19
+msgid "Click here if automatic redirection does not work."
+msgstr ""
+"Bitte klicken Sie hier, wenn die automatische Weiterleitung nicht "
+"funktionieren sollte."
+
+#: app/templates/registration/login.html:7
+msgid "Drinks - Login"
+msgstr "Getränke - Anmeldung"
+
+#: app/templates/registration/login.html:26
+msgid "Log in"
+msgstr "Anmelden"
+
+#: app/templates/registration/login.html:28
+msgid "Password/PIN"
+msgstr "Passwort/PIN"
+
+#: app/templates/registration/login.html:57
+msgid "login"
+msgstr "Anmelden"
+
+#: app/templates/registration/login.html:65
+msgid "Choose your account"
+msgstr "Bitte wählen Sie Ihren Account"
+
+#: app/templates/statistics.html:6
+msgid "Drinks - Statistics"
+msgstr "Getränke - Statistiken"
+
+#: app/templates/statistics.html:15 app/templates/userPanel.html:22
+msgid "Statistics"
+msgstr "Statistiken"
+
+#: app/templates/statistics.html:26
+msgid "Choose"
+msgstr "Auswählen"
+
+#: app/templates/statistics.html:31 app/templates/statistics.html:54
+msgid "Your orders per drink"
+msgstr "Deine Bestellungen pro Getränk"
+
+#: app/templates/statistics.html:34 app/templates/statistics.html:134
+msgid "Your orders per weekday"
+msgstr "Deine Bestellungen pro Wochentag"
+
+#: app/templates/statistics.html:37 app/templates/statistics.html:94
+msgid "Your orders per month (last 12 months)"
+msgstr "Deine Bestellungen pro Monat (letzte 12 Monate)"
+
+#: app/templates/statistics.html:40 app/templates/statistics.html:74
+msgid "All orders per drink"
+msgstr "Alle Bestellungen pro Getränk"
+
+#: app/templates/statistics.html:43 app/templates/statistics.html:154
+msgid "All orders per weekday"
+msgstr "Alle Bestellungen pro Wochentag"
+
+#: app/templates/statistics.html:46 app/templates/statistics.html:114
+msgid "All orders per month (last 12 months)"
+msgstr "Alle Bestellungen pro Monat (letzte 12 Monate)"
+
+#: app/templates/statistics.html:58 app/templates/statistics.html:78
+msgid "drink"
+msgstr "Getränk"
+
+#: app/templates/statistics.html:59 app/templates/statistics.html:79
+#: app/templates/statistics.html:99 app/templates/statistics.html:119
+#: app/templates/statistics.html:139 app/templates/statistics.html:159
+msgid "count"
+msgstr "Anzahl"
+
+#: app/templates/statistics.html:98 app/templates/statistics.html:118
+msgid "month"
+msgstr "Monat"
+
+#: app/templates/statistics.html:138 app/templates/statistics.html:158
+msgid "day"
+msgstr "Tag"
+
+#: app/templates/userPanel.html:7 app/templates/userPanel.html:9
+msgid "User"
+msgstr "Benutzer"
+
+#: app/templates/userPanel.html:13 app/templates/userPanel.html:15
+msgid "Balance"
+msgstr "Saldo"
+
+#: app/templates/userPanel.html:27
+msgid "Change Password"
+msgstr "Passwort ändern"
+
+#: app/templates/userPanel.html:29
+msgid "Logout"
+msgstr "Abmelden"
+
+#: app/views.py:47
+msgid "Invalid username or password."
+msgstr "Benutzername oder Passwort ungültig."

application/manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drinks_manager.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()