Implement PDF generator

Improve mail view
Implement voucher generation

debian_setup.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-apt install libpq-dev build-essential libpython3-dev postgis python3-pip python3-venv libgdal-dev -y
+apt install libpq-dev build-essential libpython3-dev postgis python3-pip python3-venv libgdal-dev wkhtmltopdf -y
 python3 -m venv venv
 source venv/bin/activate
 pip install -Ur requirements.txt

localauth/views.py

@@ -51,6 +51,6 @@ class VerificationView(SuperUserRequiredMixin, FormView):
 
         return HttpResponseRedirect(resolve_url("localauth:verify"))
 
-class EmailVerificationHTMLMailView(MailView):
+class EmailVerificationMailView(MailView):
     template_name = "localauth/mail/verify.html"
     

mail/views.py

@@ -9,29 +9,42 @@ from html.parser import HTMLParser
 from bs4 import BeautifulSoup
 
 class MailView(ContextMixin):
-    def __init__(self, template_name=None, html_template_name=None, text_template_name=None):
-        self.html_template_name = html_template_name
-        self.text_template_name = text_template_name
+    template_name = None
 
-        if template_name:
-            self._template_name = template_name
-
-            if len(template_name.split("/")[-1].split(".")[-1] in ("html", "txt")):
+    @property
+    def html_template_name(self):
+        if self.template_name:
+            if self.template_name.split("/")[-1].split(".")[-1] in ("html", "txt"):
                 basename = template_name.rsplit(".", 1)[0]
             else:
                 basename = template_name
 
-            for ext in ("html", "txt"):
             try:
-                    path = f"{basename}.{ext}"
+                path = f"{basename}.html"
                 render_to_string(path)
-                    if ext == "html":
-                        self.html_template_name = self.html_template_name or path
-                    else:
-                        self.text_template_name = self.text_template_name or path
+                return path
             except TemplateDoesNotExist:
                 pass
 
+        return False
+
+    @property
+    def text_template_name(self):
+        if self.template_name:
+            if self.template_name.split("/")[-1].split(".")[-1] in ("html", "txt"):
+                basename = template_name.rsplit(".", 1)[0]
+            else:
+                basename = template_name
+
+            try:
+                path = f"{basename}.txt"
+                render_to_string(path)
+                return path
+            except TemplateDoesNotExist:
+                pass
+
+        return False
+
     def render_to_html(self, **kwargs):
         if self.html_template_name:
             context = self.get_context_data(**kwargs)

payment/urls.py

@@ -7,5 +7,6 @@ app_name = "payment"
 urlpatterns = [
     path('gateways/paypal/', include("payment.paypal.urls"), name="paypal"),
     path('gateways/sepa/', include("payment.sepa.urls"), name="sepa"),
+    path('gateways/voucher/', include("payment.voucher.urls"), name="voucher"),
     path('status/<slug:uuid>/', PaymentStatusView.as_view(), name="status"),
 ]

payment/voucher/models.py

@@ -1,13 +1,21 @@
 from django.db import models
 from django.contrib.auth import get_user_model
+from django.urls import reverse_lazy
 
 from .helpers import generate_voucher_code
+from ..const import PAYMENT_STATUS_SUCCESS, PAYMENT_STATUS_FAILED, PAYMENT_STATUS_REFUNDED
+from ..models import InvoicePayment
 
-from payment.const import PAYMENT_STATUS_SUCCESS, PAYMENT_STATUS_FAILED, PAYMENT_STATUS_REFUNDED
 from clients.models import ClientProfile
 
+from dbsettings.functions import getValue
+
+from datetime import timedelta
+
+import uuid
+
 class Voucher(models.Model):
-    code = models.IntegerField(default=generate_voucher_code)
+    code = models.BigIntegerField(default=generate_voucher_code, unique=True)
     value = models.DecimalField(max_digits=10, decimal_places=2)
     created_at = models.DateTimeField(auto_now_add=True)
 
@@ -19,6 +27,21 @@ class Voucher(models.Model):
         except VoucherActivation.DoesNotExist:
             return False
 
+    def get_absolute_url(self):
+        return VoucherDownloadURL.objects.create(voucher=self).get_absolute_url()
+
+class VoucherDownloadURL(models.Model):
+    uuid = models.UUIDField(default=uuid.uuid4, primary_key=True)
+    voucher = models.ForeignKey(Voucher, models.CASCADE)
+    created = models.DateTimeField(auto_now_add=True)
+
+    @property
+    def expiry(self):
+        return self.created + timedelta(seconds=getValue("payment.voucher.urlvalidity", 300))
+
+    def get_absolute_url(self):
+        return reverse_lazy("payment:voucher:download")
+
 class VoucherActivation(models.Model):
     voucher = models.OneToOneField(Voucher, models.PROTECT)
     user = models.ForeignKey(get_user_model(), models.PROTECT)

payment/voucher/urls.py

@@ -0,0 +1,10 @@
+from django.urls import path
+
+from .views import AdminGenerateVoucherView, DownloadVoucherView
+
+app_name = "voucher"
+
+urlpatterns = [
+    path('generate/', AdminGenerateVoucherView.as_view(), name="generate"),
+    path('download/<slug:pk>/', DownloadVoucherView.as_view(), name="download"),
+]

payment/voucher/views.py

@@ -0,0 +1,38 @@
+from django.views.generic import CreateView, DetailView
+from django.shortcuts import redirect
+from django.utils import timezone
+from django.http import Http404, HttpResponse
+
+from localauth.mixins import SuperUserRequiredMixin
+from pdf.views import PDFView
+
+from .models import VoucherDownloadURL
+
+class AdminGenerateVoucherView(SuperUserRequiredMixin, CreateView):
+    pass
+
+class VoucherPDFView(PDFView):
+    template_name = "payment/voucher/pdfvoucher.html"
+    voucher = None
+
+    def get_context_data(self, **kwargs):
+        return super().get_context_data(voucher=self.voucher, **kwargs)
+
+class DownloadVoucherView(DetailView):
+    model = VoucherDownloadURL
+
+    def get(self, request, *args, **kwargs):
+        obj = self.get_object()
+        
+        if (not obj) or obj.expiry < timezone.now():
+            raise Http404()
+
+        pdfview = VoucherPDFView()
+        pdfview.voucher = obj.voucher
+        pdf = pdfview.render()
+
+        response = HttpResponse(pdf, content_type="application/pdf")
+
+        response['Content-Disposition'] = 'inline; filename=voucher.pdf'
+
+        return response

pdf/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

pdf/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class PdfConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'pdf'

pdf/models.py

@@ -0,0 +1,3 @@
+from django.db import models
+
+# Create your models here.

pdf/tests.py

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

pdf/views.py

@@ -0,0 +1,23 @@
+from django.views.generic.base import ContextMixin
+from django.template.loader import render_to_string
+from django.template.exceptions import TemplateDoesNotExist
+from django.core.mail import EmailMultiAlternatives
+from django.conf import settings
+
+from html.parser import HTMLParser
+
+from bs4 import BeautifulSoup
+
+import pdfkit
+
+class PDFView(ContextMixin):
+    template_name = None
+
+    def render_to_html(self, **kwargs):
+        context = self.get_context_data(**kwargs)
+        return render_to_string(self.template_name, context)
+
+    def render(self, **kwargs):
+        html = self.render_to_html(**kwargs)
+        pdf = pdfkit.from_string(html, False)
+        return pdf

requirements.txt

@@ -23,4 +23,5 @@ django-filtersignals
 python-magic
 bs4
 django-starfield
+pdfkit
 git+https://kumig.it/kumisystems/PyInvoice

templates/payment/voucher/pdfvoucher.html

@@ -0,0 +1,102 @@
+{% load static %}
+<html>
+<head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
+    <style>
+        html {
+            margin-top: 0in !important;
+            margin-left: 0in !important;
+        }
+
+        @page {
+            margin: 0px;
+        }
+
+        body {
+            font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+            font-size: 13px;
+            line-height: 1.4em;
+            margin: 0px;
+        }
+
+        .voucher {
+            width: 8in;
+            height: 3.77in;
+            position: relative;
+        }
+
+
+        .voucher-img {
+            max-width: 100%;
+            height: auto;
+            position: relative;
+        }
+
+        .field-amount {
+            position: absolute;
+            top: 236px;
+            right: 353px;
+            color: #fff;
+            font-size: 57px;
+            line-height: 40px;
+            font-weight: 500;
+        }
+
+        .field-content {
+            position: absolute;
+            width: 40%;
+            right: 10px;
+            top: 48px;
+            text-align: center;
+        }
+
+        .demo-title {
+            font-size: 35px;
+            font-weight: 300;
+            line-height: 1;
+        }
+
+        .demo-p {
+            font-size: 16px;
+            font-weight: 400;
+            margin-top: 10px;
+        }
+
+        .field-code {
+            padding: 15px;
+            border: 1px dotted;
+            margin: 35px 0 15px;
+            font-size: 20px;
+            font-weight: 600;
+        }
+
+        .field-expiry {
+            padding: 8px 13px;
+            background: #eee;
+        }
+
+        .field-customer {
+            margin-top: 20px;
+        }
+    </style>
+</head>
+
+<body>
+
+<div class="voucher">
+    <img class="voucher-img" src="{% static "payment/voucher/gift-card-img.jpg" %}" />
+
+    <span class="field-amount">{{ voucher.value }}</span>
+
+    <div class="field-content">
+        <div class="demo-title">JourneyJoker-Gutschein</div>
+        <div class="demo-p">Buche noch heute deinen nächsten Traumurlaub.</div>
+
+        <div class="field-code">{{ voucher.code }}</div>
+        <div class="field-expiry">Gutschein erstellt am {{ voucher.created_at }}</div>
+        <div class="field-customer" style="display:none;">Gekauft von {{ voucher.customer.user.name }}</div>
+    </div>
+</div>
+
+</body>
+</html>