Update project 11 FRONT MVP phase 2 complete

backend/core/pdf_generator.py

@@ -0,0 +1,53 @@
+import io
+import qrcode
+from reportlab.lib.pagesizes import landscape, A5
+from reportlab.pdfgen import canvas
+from reportlab.lib import colors
+from reportlab.lib.utils import ImageReader
+
+def generate_qr_ticket(ticket_id: int, user_id: int, seat_id: int = 0) -> bytes:
+    buffer = io.BytesIO()
+    width, height = landscape(A5)
+    c = canvas.Canvas(buffer, pagesize=(width, height))
+
+    # Темный фон (под дизайн фронтенда)
+    c.setFillColor(colors.HexColor("#121212"))
+    c.rect(0, 0, width, height, fill=1, stroke=0)
+
+    # Белая карточка билета
+    margin = 20
+    c.setFillColor(colors.white)
+    c.roundRect(margin, margin, width - 2*margin, height - 2*margin, 10, fill=1, stroke=0)
+
+    # Текст
+    c.setFillColor(colors.black)
+    c.setFont("Helvetica-Bold", 28)
+    c.drawString(margin + 30, height - margin - 50, "EVENT TICKET")
+
+    c.setFont("Helvetica", 14)
+    c.drawString(margin + 30, height - margin - 100, f"Ticket ID: {ticket_id}")
+    c.drawString(margin + 30, height - margin - 130, f"User ID: {user_id}")
+    if seat_id:
+        c.drawString(margin + 30, height - margin - 160, f"Seat ID: {seat_id}")
+
+    c.setFont("Helvetica-Oblique", 10)
+    c.setFillColor(colors.gray)
+    c.drawString(margin + 30, margin + 30, "Scan this QR code at the entrance.")
+
+    # QR-код
+    qr = qrcode.QRCode(box_size=5, border=1)
+    qr.add_data(f"TICKET:{ticket_id}|USER:{user_id}|SEAT:{seat_id}")
+    qr.make(fit=True)
+    img = qr.make_image(fill_color="black", back_color="white")
+    
+    # Буферизация картинки для ReportLab
+    img_buffer = io.BytesIO()
+    img.save(img_buffer, format="PNG")
+    img_buffer.seek(0)
+    
+    c.drawImage(ImageReader(img_buffer), width - margin - 160, margin + 30, width=130, height=130)
+
+    c.showPage()
+    c.save()
+    buffer.seek(0)
+    return buffer.read()

backend/requirements.txt

@@ -12,3 +12,4 @@ aio-pika
 reportlab
 aioboto3
 pydantic[email]>=2.5.0
+qrcode[pil]==7.4.2

backend/worker.py

@@ -1,22 +1,20 @@
 """
 Standalone worker: слушает очередь RabbitMQ 'ticket_events',
-генерирует PDF-билет через reportlab, загружает в MinIO,
+генерирует PDF-билет через core.pdf_generator, загружает в MinIO,
 сохраняет pdf_url в PostgreSQL.
 """
 import asyncio
-import io
 import json
 import logging
 import os
 from typing import Any
 
 import aio_pika
-from reportlab.lib.pagesizes import A4
-from reportlab.pdfgen import canvas
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 
 from core.minio import ensure_bucket_exists, upload_pdf
+from core.pdf_generator import generate_qr_ticket
 from database.models import Ticket
 
 logging.basicConfig(
@@ -33,27 +31,6 @@ DATABASE_URL: str = os.getenv(
 QUEUE_NAME: str = "ticket_events"
 
 
-def _build_pdf(ticket_id: int, seat_id: int, user_id: int) -> bytes:
-    """Генерирует PDF-билет в памяти и возвращает байты."""
-    buffer = io.BytesIO()
-    pdf = canvas.Canvas(buffer, pagesize=A4)
-    width, height = A4
-
-    pdf.setFont("Helvetica-Bold", 24)
-    pdf.drawCentredString(width / 2, height - 80, "TICKET")
-
-    pdf.setFont("Helvetica", 14)
-    pdf.drawCentredString(width / 2, height - 130, f"Ticket ID: {ticket_id}")
-    pdf.drawCentredString(width / 2, height - 160, f"Seat ID:   {seat_id}")
-    pdf.drawCentredString(width / 2, height - 190, f"User ID:   {user_id}")
-
-    pdf.setFont("Helvetica-Oblique", 10)
-    pdf.drawCentredString(width / 2, 40, "Thank you for your purchase!")
-
-    pdf.save()
-    return buffer.getvalue()
-
-
 async def _handle_ticket_paid(
     payload: dict[str, Any],
     db_session: AsyncSession,
@@ -75,10 +52,10 @@ async def _handle_ticket_paid(
         return
 
     log.info("Generating PDF for ticket %s …", ticket_id)
-    pdf_bytes = _build_pdf(
+    pdf_bytes = generate_qr_ticket(
         ticket_id=ticket.id,
-        seat_id=ticket.seat_id,
         user_id=ticket.user_id or 0,
+        seat_id=ticket.seat_id,
     )
 
     object_name = f"tickets/ticket_{ticket_id}.pdf"