Make Stripe configurable

app/local_settings.py

@@ -38,3 +38,5 @@ if DEBUG:
         "127.0.0.1",
         "10.0.2.2",
     ]
+
+SETTINGS_EXPORT = ["STRIPE_ENABLED"]

app/settings.py

@@ -72,6 +72,7 @@ TEMPLATES = [
                 "django.template.context_processors.request",
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
+                "core.util.django_settings_export.settings_export",
             ],
         },
     },

core/models.py

@@ -1,9 +1,10 @@
 import logging
 
 import stripe
+from django.conf import settings
 from django.contrib.auth.models import AbstractUser
 from django.db import models
-from django.conf import settings
+
 from core.lib.customers import get_or_create, update_customer_fields
 
 logger = logging.getLogger(__name__)
@@ -37,7 +38,9 @@ class User(AbstractUser):
         """
         if settings.STRIPE_ENABLED:
             if not self.stripe_id:  # stripe ID not stored
-                self.stripe_id = get_or_create(self.email, self.first_name, self.last_name)
+                self.stripe_id = get_or_create(
+                    self.email, self.first_name, self.last_name
+                )
 
             to_update = {}
             if self.email != self._original.email:

core/templates/base.html

@@ -201,10 +201,12 @@
           <a class="navbar-item" href="{% url 'home' %}">
             Home
           </a>
-          {% if user.is_authenticated %}
-            <a class="navbar-item" href="{% url 'billing' %}">
-              Billing
-            </a>
+          {% if settings.STRIPE_ENABLED %}
+            {% if user.is_authenticated %}
+              <a class="navbar-item" href="{% url 'billing' %}">
+                Billing
+              </a>
+            {% endif %}
           {% endif %}
           {% if user.is_superuser %}
             <div class="navbar-item has-dropdown is-hoverable">

core/util/django_settings_export.py

@@ -0,0 +1,78 @@
+"""
+Export Django settings to templates
+
+https://github.com/jakubroztocil/django-settings-export
+
+"""
+from django.conf import settings as django_settings
+from django.core.exceptions import ImproperlyConfigured
+
+
+__version__ = '1.2.1'
+
+
+VARIABLE_NAME = getattr(django_settings,
+                        'SETTINGS_EXPORT_VARIABLE_NAME',
+                        'settings')
+
+
+class SettingsExportError(ImproperlyConfigured):
+    """Base error indicating misconfiguration."""
+
+
+class UndefinedSettingError(SettingsExportError):
+    """An undefined setting name included in SETTINGS_EXPORT."""
+
+
+class UnexportedSettingError(SettingsExportError):
+    """An unexported setting has been accessed from a template."""
+
+
+def settings_export(request):
+    """
+    The template context processor that adds settings defined in
+    `SETTINGS_EXPORT` to the context. If SETTINGS_EXPORT_VARIABLE_NAME is not
+    set, the context variable will be `settings`.
+
+    """
+    variable_name = getattr(django_settings,
+                            'SETTINGS_EXPORT_VARIABLE_NAME',
+                            'settings')
+    return {
+        variable_name: _get_exported_settings()
+    }
+
+
+class ExportedSettings(dict):
+
+    def __getitem__(self, item):
+        """Fail loudly if accessing a setting that is not exported."""
+        try:
+            return super(ExportedSettings, self).__getitem__(item)
+        except KeyError:
+            if hasattr(self, item):
+                # Let the KeyError propagate so that Django templates
+                # can access the existing attribute (e.g. `items()`).
+                raise
+            raise UnexportedSettingError(
+                'The `{key}` setting key is not accessible'
+                ' from templates: add "{key}" to'
+                ' `settings.SETTINGS_EXPORT` to change that.'
+                .format(key=item)
+            )
+
+
+def _get_exported_settings():
+    exported_settings = ExportedSettings()
+    for key in getattr(django_settings, 'SETTINGS_EXPORT', []):
+        try:
+            value = getattr(django_settings, key)
+        except AttributeError:
+            raise UndefinedSettingError(
+                '"settings.%s" is included in settings.SETTINGS_EXPORT '
+                'but it does not exist. '
+                % key
+            )
+        exported_settings[key] = value
+    return exported_settings
+

core/views/base.py

@@ -30,6 +30,8 @@ class Billing(LoginRequiredMixin, View):
     template_name = "billing.html"
 
     async def get(self, request):
+        if not settings.STRIPE_ENABLED:
+            return redirect(reverse("home"))
         plans = await sync_to_async(list)(Plan.objects.all())
         user_plans = await sync_to_async(list)(request.user.plans.all())
         context = {"plans": plans, "user_plans": user_plans}
@@ -38,6 +40,8 @@ class Billing(LoginRequiredMixin, View):
 
 class Order(LoginRequiredMixin, View):
     async def get(self, request, plan_name):
+        if not settings.STRIPE_ENABLED:
+            return redirect(reverse("home"))
         plan = Plan.objects.get(name=plan_name)
         try:
             cast = {
@@ -63,6 +67,8 @@ class Order(LoginRequiredMixin, View):
 
 class Cancel(LoginRequiredMixin, View):
     async def get(self, request, plan_name):
+        if not settings.STRIPE_ENABLED:
+            return redirect(reverse("home"))
         plan = Plan.objects.get(name=plan_name)
         try:
             subscriptions = stripe.Subscription.list(
@@ -88,6 +94,8 @@ class Signup(CreateView):
 
 class Portal(LoginRequiredMixin, View):
     async def get(self, request):
+        if not settings.STRIPE_ENABLED:
+            return redirect(reverse("home"))
         session = stripe.billing_portal.Session.create(
             customer=request.user.stripe_id,
             return_url=request.build_absolute_uri(reverse("billing")),