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()