Refactor Zasilkovna client, update imports and cleanup

Refactored the Zasilkovna SOAP client to use a singleton pattern with caching and lazy loading, improving reliability and startup performance. Updated invoice PDF generation to import WeasyPrint lazily, preventing startup failures on systems missing dependencies. Cleaned up unused imports and code in several frontend components, removed unused state and variables, and adjusted Docker frontend port mapping. Also updated Django migration files to reflect a new generation timestamp.

backend/account/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 import account.models
 import django.contrib.auth.validators

backend/commerce/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 import django.core.validators
 import django.db.models.deletion

backend/commerce/models.py

@@ -7,9 +7,9 @@ from django.template.loader import render_to_string
 from django.core.files.base import ContentFile
 from django.core.validators import MaxValueValidator, MinValueValidator
 
-from weasyprint import HTML
 import os
 
+
 from configuration.models import SiteConfiguration
 
 from thirdparty.zasilkovna.models import ZasilkovnaPacket
@@ -582,6 +582,16 @@ class Invoice(models.Model):
         order = Order.objects.get(invoice=self)
         # Render HTML
         html_string = render_to_string("invoice/invoice.html", {"invoice": self})
+        # Import WeasyPrint lazily to avoid startup failures when system
+        # libraries (Pango/GObject) are not present on Windows.
+        try:
+
+            from weasyprint import HTML
+        except Exception as e:
+            raise RuntimeError(
+                "WeasyPrint is not available. Install its system dependencies (Pango/GTK) or run the backend in Docker."
+            ) from e
+
         pdf_bytes = HTML(string=html_string).write_pdf()
 
         # Save directly to FileField

backend/commerce/tasks.py

@@ -5,6 +5,10 @@ from django.apps import apps
 from django.utils import timezone
 
 
+# -- CLEANUP TASKS --
+
+# Delete expired/cancelled orders (older than 24 hours)
+@shared_task
 def delete_expired_orders():
     Order = apps.get_model('commerce', 'Order')
 

backend/configuration/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 from django.db import migrations, models
 

backend/thirdparty/downloader/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 from django.db import migrations, models
 

backend/thirdparty/gopay/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 import django.db.models.deletion
 import django.utils.timezone

backend/thirdparty/stripe/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 from django.db import migrations, models
 

backend/thirdparty/zasilkovna/client.py

@@ -1,28 +1,49 @@
 from zeep import Client
 from zeep.exceptions import Fault
+from zeep.transports import Transport
+from zeep.cache import SqliteCache
 
+import tempfile
 import base64
 import logging
 import os
 
+from functools import lru_cache
+
 logger = logging.getLogger(__name__)
 
 WSDL_URL = os.getenv("PACKETA_WSDL_URL", "https://www.zasilkovna.cz/api/soap.wsdl")
 PACKETA_API_PASSWORD = os.getenv("PACKETA_API_PASSWORD")
 
 
-zeepZasClient = Client(wsdl=WSDL_URL)
+
+
+# --- 1. Singleton pro klienta (aby se WSDL stáhlo jen jednou pro celý proces) ---
+@lru_cache(maxsize=1)
+def get_shared_client():
+    """
+    Tato funkce vrátí instanci klienta a drží ji v tempfile na jednu hodinu.
+    """
+    if not PACKETA_API_PASSWORD:
+        raise ValueError("Packeta API password is not set.")
+    
+    
+    tempFpath = os.path.join(tempfile.gettempdir(), 'zeep_packeta_cache.db')
+    transport = Transport(cache=SqliteCache(path=tempFpath, timeout=3600))
+    
+    return Client(wsdl=WSDL_URL, transport=transport)
 
 
 class PacketaAPI:
-    #TODO: zeptat se jestli nepřidat další checkovací parametry ohledně zásilkovny např: blokování podle configurace webu
+    # --- 2. Property pro lazy loading ---
-    # popřemýšlet, jestli api klíče nenastavit přes configurator webu
+    @property
-    def __getattribute__(self):
+    def client(self):
-        if PACKETA_API_PASSWORD in [None, ""]:
+        """
-            raise Exception("Packeta API password is not set in environment variables.")
+        Při zavolání self.client se zavolá tento kód.
+        Vrátí již existujícího klienta z cache.
+        """
+        return get_shared_client()
         
-        elif zeepZasClient is None:
-            raise Exception("Packeta SOAP client is not initialized.")
     
     # ---------- CREATE PACKET METHODS ----------
 
@@ -68,7 +89,7 @@ class PacketaAPI:
 
         try:
             # Použijeme createPacketClaimWithPassword, protože umožňuje ukládat email a telefon
-            result = zeepZasClient.service.createPacketClaimWithPassword(PACKETA_API_PASSWORD, attributes)
+            result = self.client.service.createPacketClaimWithPassword(PACKETA_API_PASSWORD, attributes)
             return result
 
         except Fault as e:
@@ -83,7 +104,7 @@ class PacketaAPI:
         packet_id = 1234567890
         """
         try:
-            zeepZasClient.service.cancelPacket(PACKETA_API_PASSWORD, packet_id)
+            self.client.service.cancelPacket(PACKETA_API_PASSWORD, packet_id)
 
             return {"status": "ok", "message": f"Zásilka {packet_id} byla zrušena."}
         
@@ -99,7 +120,7 @@ class PacketaAPI:
         Vrací datum do kdy je uložená zásilka.
         """
         try:
-            request = zeepZasClient.service.packetGetStoredUntil(PACKETA_API_PASSWORD, packet_id)
+            request = self.client.service.packetGetStoredUntil(PACKETA_API_PASSWORD, packet_id)
             if request is None:
                 raise Exception(f"Zásilka {packet_id} nebyla ještě doručena.")
             
@@ -128,7 +149,7 @@ class PacketaAPI:
             bytes: PDF soubor (base64 dekódovaný)
         """
         try:
-            pdf_base64 = zeepZasClient.service.packetLabelPdf(
+            pdf_base64 = self.client.service.packetLabelPdf(
                 PACKETA_API_PASSWORD, packet_id, format, offset
             )
 
@@ -163,7 +184,7 @@ class PacketaAPI:
         packet_ids = ["1234567890", "1234567891", "1234567892"]
         """
         try:
-            result = zeepZasClient.service.createShipment(PACKETA_API_PASSWORD, packet_ids)
+            result = self.client.service.createShipment(PACKETA_API_PASSWORD, packet_ids)
 
             return result
         
@@ -176,7 +197,7 @@ class PacketaAPI:
         Získá seznam balíků ve shipmentu podle jeho shipmentId.
         """
         try:
-            result = zeepZasClient.service.shipmentPackets(PACKETA_API_PASSWORD, shipment_id)
+            result = self.client.service.shipmentPackets(PACKETA_API_PASSWORD, shipment_id)
             return result
         except Fault as e:
             logger.error(f"Packeta shipmentPackets error: {e}")

backend/thirdparty/zasilkovna/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 5.2.9 on 2025-12-14 02:23
+# Generated by Django 5.2.7 on 2025-12-18 15:11
 
 import django.core.validators
 from django.db import migrations, models

docker-compose.yml

@@ -93,8 +93,8 @@ services:
     env_file:
       - ./frontend/.env
     ports:
-     - 80:80
+     # - 80:80
-      # - 9000:80
+     - 9000:80
     depends_on:
       - backend
     networks:

frontend/src/components/hero/HeroCarousel.tsx

@@ -0,0 +1,6 @@
+export default function HeroCarousel() {
+  return (
+    <>
+    </>
+  );
+}

frontend/src/components/navbar/SiteNav.tsx

@@ -12,7 +12,6 @@ import {
   FaPlayCircle,
   FaUsers,
   FaHandsHelping,
-  FaProjectDiagram,
 } from "react-icons/fa";
 import {FaClapperboard, FaCubes} from "react-icons/fa6";
 import styles from "./navbar.module.css";

frontend/src/context/AuthContext.tsx

@@ -1,4 +1,5 @@
-import { createContext, useContext, useState, useEffect, ReactNode } from "react";
+// import type { ReactNode } from "react";
+// import { createContext, useContext, useState, useEffect } from "react";
 
 //TODO: připraveno pro použití jenom linknout funkce z vygenerovaného api klientan a logout() a currentUser()
 

frontend/src/layouts/Default.tsx

@@ -1,17 +1,17 @@
 import Footer from "../components/Footer/footer";
 import ContactMeForm from "../components/Forms/ContactMe/ContactMeForm";
-import HomeNav from "../components/navbar/HomeNav";
 import Drone from "../components/ads/Drone/Drone";
 import Portfolio from "../components/ads/Portfolio/Portfolio";
 import Home from "../pages/home/home";
 import { Outlet } from "react-router";
+import Navbar from "../components/navbar/SiteNav";
 
 export default function HomeLayout(){
     return(
         <>
             {/* Example usage of imported components, adjust as needed */}
             
-            <HomeNav />
+            <Navbar user={null} onLogin={() => {}} onLogout={() => {}} />
             
             <Home /> {/*page*/}
             <div style={{margin: "10em 0"}}>

frontend/src/pages/downloader/Downloader.tsx

@@ -1,5 +1,3 @@
-import { useEffect, useMemo, useState } from "react";
-
 export default function Downloader() {
 
   return (

frontend/src/pages/home/components/Services/Services.tsx

@@ -1,13 +1,8 @@
-import { useState } from "react";
-
 import KinematografieSection from "./kinematografie";
 import DroneServisSection from "./droneServis";
 import WebsiteServiceSection from "./webs";
 
-import styles from "./Services.module.css";
-
 export default function Services() {
-  const [active, setActive] = useState<Project | null>(null);
   return (
     <article id="services" className="section">
       <WebsiteServiceSection />

frontend/src/pages/home/components/Services/TradingGraph.tsx

@@ -37,7 +37,6 @@ export default function TradingGraph() {
     const colorOther = styles.getPropertyValue("--c-other").trim();
     const colorLines = styles.getPropertyValue("--c-lines").trim();
     const colorBoxes = styles.getPropertyValue("--c-boxes").trim();
-    const colorBg = styles.getPropertyValue("--c-background").trim();
 
     // Set canvas size
     const rect = canvas.getBoundingClientRect();

frontend/src/pages/home/components/Services/droneServis.tsx

@@ -1,6 +1,3 @@
-import styles from "./Services.module.css";
-
-
 export default function DroneServisSection() {
     return (
         <article id="drone-servis" className="section">

frontend/src/pages/home/components/Services/kinematografie.tsx

@@ -1,5 +1,3 @@
-import styles from "./Services.module.css";
-
 export default function KinematografieSection() {
   return (
     <article id="kinematografie" className="section">

frontend/src/pages/home/components/Services/webs.tsx

@@ -1,6 +1,3 @@
-import styles from "./Services.module.css";
-import TradingGraph from "./TradingGraph";
-
 export default function WebsiteServiceSection() {
     return (
         <article id="web-services" className="section">