feat: Implement PDF receipt generation and email sending for purchases

tienda/pdf.py

@@ -0,0 +1,39 @@
+from fpdf import FPDF
+import string, random
+class Recibo(FPDF):
+    def header(self):
+        self.set_font('Arial', 'B', 15)
+        self.cell(0, 10, 'RECIBO DE PAGO', ln=True, align='C')
+        self.ln(10)
+
+    def footer(self):
+        self.set_y(-15)
+        self.set_font('Arial', 'I', 8)
+        self.cell(0, 10, f'Pagina {self.page_no()}', align='C')
+
+def generar_recibo(cliente: str, total: float, objetos: list, metodo_pago: str):
+    pdf = Recibo()
+    pdf.add_page()
+    pdf.set_font("Arial", size=12)
+
+    pdf.cell(0, 10, f"Cliente: {cliente}", ln=True)
+    pdf.cell(0, 10, f"")
+
+    DATA = []
+    DATA.append(
+        ("Cant.", "Nombre", "Precio Unit.", "Subtotal")
+    )
+
+    pdf.cell(0, 10, "DETALLE DEL COBRO", ln=True, align='C')
+    pdf.ln(5)
+
+    with pdf.table() as table:
+        for data_row in DATA:
+            row = table.row()
+            for datum in data_row:
+                row.cell(datum)
+    pdf.ln(5)
+    pdf.set_font("Arial", "B", 12)
+    pdf.cell(0, 10, f'TOTAL A PAGAR: {total} €', align="R")
+    return pdf.output(dest="S")
+    

tienda/tasks.py

@@ -1,9 +1,11 @@
 from celery import shared_task
 from django.conf import settings
 from django.template.loader import render_to_string
+from django.core.mail import EmailMessage
 from .utilities import send_email, send_hemail
 from .vars import login_message, verify_message
 import random, string
+from . import pdf
 
 from .models import User, VerificationCode
 @shared_task
@@ -51,3 +53,24 @@ def enviar_correo_recuperacion(email: str):
         )
 
         send_hemail(email, "Reset de Contraseña", html_content, "Estas reseteando la contraseña...")
+
+
+# Purchased items should be a list of dictionary, the dictionary must follow this tags: amount, product name, price (each)
+@shared_task
+def process_purchase(user_id: int, purchased_items: list, payment_method: str):
+    user = User.objects.get(id=user_id)
+    total = 0
+    for i in purchased_items:
+        total += i["price"]*i["amount"]
+    pdf_data = pdf.generar_recibo(user.get_full_name(), total, purchased_items, payment_method)
+    
+    email = EmailMessage(
+        subject="Tu recibo de compra",
+        body = "Hola, adjunto encontrarás el recibo de tu reciente transacción",
+        from_email = settings.DEFAULT_FROM_EMAIL,
+        to = [user.email]
+    )
+
+    email.attach("recibo.pdf", pdf_data, "application/pdf")
+
+    email.send()

tienda/views.py

@@ -328,6 +328,7 @@ def create_order_from_cart(request, payment_method, payment_reference="", shippi
 
     order_total = Decimal("0.00")
     items_with_totals = []
+    purchased_items = []
 
     for item in cart_items:
         product = item.product
@@ -338,6 +339,13 @@ def create_order_from_cart(request, payment_method, payment_reference="", shippi
         )
         order_total += line_total_with_vat
         items_with_totals.append((item, unit_price_with_vat, line_total_with_vat))
+        purchased_items.append(
+            {
+                "amount": item.quantity,
+                "product_name": product.name,
+                "price": float(unit_price_with_vat),
+            }
+        )
 
     with transaction.atomic():
         order = Order.objects.create(
@@ -364,6 +372,9 @@ def create_order_from_cart(request, payment_method, payment_reference="", shippi
 
         cart.items.all().delete()
 
+    if request.user.is_authenticated and purchased_items:
+        tasks.process_purchase.delay(request.user.id, purchased_items, payment_method)
+
     return order