Add support for PDF view

src/meal_manager/main.py

@@ -6,7 +6,7 @@ from functools import partial
 from typing import Annotated
 
 import starlette.status as status
-from fastapi import Depends, FastAPI, HTTPException, Request
+from fastapi import Depends, FastAPI, HTTPException, Request, Response
 from fastapi.responses import RedirectResponse
 from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
@@ -21,6 +21,7 @@ from meal_manager.models import (
     Subscription,
     TeamRegistration,
 )
+from meal_manager.pdf import build_dinner_overview_pdf
 
 sqlite_file_name = "database.db"
 sqlite_url = f"sqlite:///{sqlite_file_name}"
@@ -332,3 +333,21 @@ async def delete_team_registration(
     session.delete(session.scalars(statement).one())
     session.commit()
     return RedirectResponse(url=f"/event/{event_id}", status_code=status.HTTP_302_FOUND)
+
+@app.get("/event/{event_id}/pdf")
+def get_event_attendance_pdf(event_id: int, session: SessionDep):
+
+    statement = select(Event).where(Event.id == event_id)
+    event = session.scalars(statement).one()
+
+    pdf_buffer = build_dinner_overview_pdf(event)
+
+    headers = {
+        "Content-Disposition": f"inline; filename=attendance_event_{event_id}.pdf"
+    }
+
+    return Response(
+        content=pdf_buffer.getvalue(),
+        media_type="application/pdf",
+        headers=headers
+    )

src/meal_manager/pdf.py

@@ -0,0 +1,101 @@
+from io import BytesIO
+
+from reportlab.lib import colors
+from reportlab.lib.pagesizes import A4, portrait
+from reportlab.lib.styles import getSampleStyleSheet
+from reportlab.platypus import Paragraph, SimpleDocTemplate, Spacer, Table, TableStyle
+
+from meal_manager.models import Event
+
+
+def build_dinner_overview_pdf(event: Event) -> BytesIO:
+    """Build a PDF with an overview of the event's attendance."""
+    # Create an in-memory PDF
+    buffer = BytesIO()
+    doc = SimpleDocTemplate(buffer, pagesize=portrait(A4), topMargin=30, bottomMargin=30, leftMargin=40, rightMargin=40)
+    styles = getSampleStyleSheet()
+    elements = []
+
+    # Title
+    title_style = styles["Title"]
+    title_style.fontSize = 16
+    title_style.spaceAfter = 20
+    elements.append(Paragraph(f"Anwesenheitsliste – {event.title} ({event.event_time.date().strftime('%d.%m.%y')})",
+                              title_style))
+    elements.append(Spacer(1, 20))
+
+    # Team overview section
+    elements.append(Paragraph("Dienste", styles["Heading2"]))
+    elements.append(Spacer(1, 12))
+
+    team_data = [["Team", "Personen"]]
+    team_types = {
+        "Kochen": [r for r in event.team if r.work_type == "cooking"],
+        "Abwaschen": [r for r in event.team if r.work_type == "dishes"],
+        "Tische decken": [r for r in event.team if r.work_type == "tables"]
+    }
+
+    for team_name, registrations in team_types.items():
+        members = ", ".join(r.person_name for r in registrations)
+        team_data.append([team_name, members])
+
+    team_table = Table(team_data, repeatRows=1, colWidths=[100, '*'])
+    team_table.setStyle(TableStyle([
+        ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor('#E8E8E8')),
+        ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor('#A0A0A0')),
+        ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
+        ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
+        ("FONTSIZE", (0, 0), (-1, -1), 10),
+        ("BOTTOMPADDING", (0, 0), (-1, -1), 8),
+        ("TOPPADDING", (0, 0), (-1, -1), 8),
+    ]))
+
+    elements.append(team_table)
+    elements.append(Spacer(1, 25))
+
+    sum_adults = 0
+    sum_children = 0
+    sum_small_children = 0
+    for r in event.registrations:
+        sum_adults += r.num_adult_meals
+        sum_children += r.num_children_meals
+        sum_small_children += r.num_small_children_meals
+
+    # Attendance section
+    elements.append(Paragraph("Teilnehmende", styles["Heading2"]))
+    elements.append(Paragraph(f"Gesamt: {sum_adults} Erwachsene, {sum_children} Kinder, {sum_small_children} Kleinkinder"))
+    elements.append(Spacer(1, 12))
+
+    # Table header
+    data = [["Haushalt", "Erwachsene", "Kinder >7", "Kinder <7", "Kommentar", "Anwesend?"]]
+
+    # Table rows
+    for r in event.registrations:
+        data.append([
+            r.household.name,
+            r.num_adult_meals,
+            r.num_children_meals,
+            r.num_small_children_meals,
+            Paragraph(r.comment),
+            ""
+        ])
+    for _ in range(5):
+        data.append([""] * 6)
+
+    # Create table
+    table = Table(data, repeatRows=1, colWidths=[120, 70, 60, 60, '*', 65])
+    table.setStyle(TableStyle([
+        ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor('#E8E8E8')),
+        ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor('#A0A0A0')),
+        ("ALIGN", (1, 1), (-2, -1), "CENTER"),
+        ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
+        ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
+        ("FONTSIZE", (0, 0), (-1, -1), 10),
+        ("BOTTOMPADDING", (0, 0), (-1, -1), 8),
+        ("TOPPADDING", (0, 0), (-1, -1), 8),
+    ]))
+
+    elements.append(table)
+    doc.build(elements)
+    buffer.seek(0)
+    return buffer

src/meal_manager/templates/event.html

@@ -34,6 +34,9 @@
                 <i class="bi bi-book"></i> Original Rezept ansehen
             </a>
             {% endif %}
+            <a href="/event/{{event.id}}/pdf" class="btn btn-secondary mb-2 w-100" target="_blank">
+                <i class="bi bi-printer m-2"></i> Druckansicht
+            </a>
             {% if user and user.admin %}
             <button type="button" class="btn btn-danger mb-2 w-100" data-bs-toggle="modal" data-bs-target="#deleteEvent">
                 Event Löschen