Added option to bulk create vouchers via the WebUI.

Closes #9

community_backup/webui/admin.py

@@ -1,7 +1,50 @@
 from django.contrib import admin
+from django.urls import path, reverse_lazy
+from django.views.generic import FormView
+from django import forms
 
 from .models import BorgRepository, Voucher
 
+
+class VoucherBulkCreateForm(forms.Form):
+    prefix = forms.CharField(label="Voucher prefix")
+    amount = forms.IntegerField(label="Amount")
+
+
+class VoucherBulkCreateView(FormView):
+    form_class = VoucherBulkCreateForm
+    template_name = "admin/bulk_generate.html"
+    admin_site_context = None
+    success_url = reverse_lazy("admin:webui_voucher_changelist")
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        # inject the admin site context so that the navbar and other things work as intended
+        context.update(self.admin_site_context.each_context(self.request))
+        return context
+
+    def form_valid(self, form):
+        Voucher.bulk_generate(form.cleaned_data["prefix"], form.cleaned_data["amount"])
+        return super().form_valid(form)
+
+
+@admin.register(Voucher)
+class VoucherAdmin(admin.ModelAdmin):
+    change_list_template = "admin/voucher_change_list.html"
+
+    def get_urls(self):
+        urls = super().get_urls()
+        my_urls = [
+            path(
+                "bulk_generate/",
+                self.admin_site.admin_view(
+                    VoucherBulkCreateView.as_view(admin_site_context=self.admin_site)
+                ),
+                name="voucher_bulk_generate",
+            )
+        ]
+        return my_urls + urls
+
+
 # Register your models here.
 admin.site.register(BorgRepository)
-admin.site.register(Voucher)

community_backup/webui/management/commands/add_vouchers.py

@@ -11,14 +11,7 @@ class Command(BaseCommand):
         parser.add_argument("amount", type=int)
 
     def handle(self, *args, **options):
-        unabmigous_characters = "abcdefghijkmnopqrstuvwxyzACDEFHJKLMNPQRTUVWXY1234679"
-
-        vouchers = set()
-        while len(vouchers) < options["amount"]:
-            random_part = "".join(choices(unabmigous_characters, k=5))
-            vouchers.add(f"{options['prefix']}-{random_part}")
-
-        Voucher.objects.bulk_create(Voucher(code=v) for v in vouchers)
+        vouchers = Voucher.bulk_generate(options["prefix"], options["amount"])
 
         header = r"""\begin{document}
 \begin{center}

community_backup/webui/models.py

@@ -1,11 +1,12 @@
+from random import choices
+from pathlib import Path
+
 from django.db import models
 from django.contrib.auth.models import User
 from django.core.validators import RegexValidator
 from django.conf import settings
-from pathlib import Path
 import msgpack
 
-
 from .tasks import update_user
 
 
@@ -121,3 +122,20 @@ class Voucher(models.Model):
 
     def __str__(self):
         return f"Voucher '{self.code}'"
+
+    @classmethod
+    def bulk_generate(cls, prefix: str, amount: int) -> set[str]:
+        """
+        Create `amount` vouchers starting with `prefix`.
+
+        Returns a set of the voucher codes as strings.
+        """
+        unabmigous_characters = "abcdefghijkmnopqrstuvwxyzACDEFHJKLMNPQRTUVWXY1234679"
+
+        vouchers = set()
+        while len(vouchers) < amount:
+            random_part = "".join(choices(unabmigous_characters, k=5))
+            vouchers.add(f"{prefix}-{random_part}")
+
+        Voucher.objects.bulk_create(Voucher(code=v) for v in vouchers)
+        return vouchers

community_backup/webui/templates/admin/bulk_generate.html

@@ -0,0 +1,8 @@
+{% extends "admin/base_site.html" %}
+{% block content %}
+  <form method="post">
+    {% csrf_token %}
+  {{ form }}
+    <input type="submit" value="submit">
+  </form>
+{% endblock %}

community_backup/webui/templates/admin/voucher_change_list.html

@@ -0,0 +1,6 @@
+{% extends "admin/change_list.html" %}
+
+{% block object-tools-items %}
+  {{ block.super }}
+<li><a href="{% url 'admin:voucher_bulk_generate' %}" class="addlink">Bulk Generate Vouchers</a></li>
+{% endblock %}