From 2e78f34388960cb03300f0447ac226c04f2673be Mon Sep 17 00:00:00 2001
From: Tomas Dvorak <contact.dvorak@gmail.com>
Date: Wed, 11 Jun 2025 23:01:25 +0200
Subject: [PATCH] d

---
 admin-dashboard.html | 105 +++++++++++++++++++++----------------------
 1 file changed, 50 insertions(+), 55 deletions(-)

diff --git a/admin-dashboard.html b/admin-dashboard.html
index 0d213ea..882c97c 100644
--- a/admin-dashboard.html
+++ b/admin-dashboard.html
@@ -4382,7 +4382,7 @@ function filterReservations() {
     displayReservations(filtered);
 }
 
-// Function to export reservations to Excel
+// Function to export reservations to CSV
 function exportReservations() {
     if (!window.allReservations || !window.allReservations.length) {
         showNotification('Žádné rezervace k exportu', 'warning');
@@ -4390,93 +4390,88 @@ function exportReservations() {
     }
 
     // Get filtered reservations
-    const vehicleFilter = document.getElementById('vehicleFilter').value;
-    const dateFilter = document.getElementById('dateFilter').value;
+    const vehicleFilter = document.getElementById('vehicleFilter')?.value || '';
+    const dateFilter = document.getElementById('dateFilter')?.value || '';
     
     let dataToExport = [...window.allReservations];
     
     // Apply filters if set
     if (vehicleFilter) {
-        dataToExport = dataToExport.filter(res => res.vehicle === vehicleFilter);
+        dataToExport = dataToExport.filter(res => res.vehicle && res.vehicle.trim() === vehicleFilter);
     }
     if (dateFilter) {
         dataToExport = dataToExport.filter(res => {
-            const resDate = new Date(res.start).toISOString().split('T')[0];
-            return resDate === dateFilter;
+            if (!res.start) return false;
+            const reservationDate = new Date(res.start);
+            const filterDate = new Date(dateFilter);
+            
+            return reservationDate.getFullYear() === filterDate.getFullYear() &&
+                   reservationDate.getMonth() === filterDate.getMonth() &&
+                   reservationDate.getDate() === filterDate.getDate();
         });
     }
 
+    if (!dataToExport.length) {
+        showNotification('Žádná data k exportu po aplikování filtrů', 'warning');
+        return;
+    }
+
     // Sort by start date
     dataToExport.sort((a, b) => new Date(a.start) - new Date(b.start));
 
-    // Format date as DD.MM.YYYY
-    const formatDate = (dateString) => {
+    // Format date and time as DD.MM.YYYY HH:MM
+    const formatDateTime = (dateString) => {
         const date = new Date(dateString);
         const day = String(date.getDate()).padStart(2, '0');
         const month = String(date.getMonth() + 1).padStart(2, '0');
         const year = date.getFullYear();
-        return `${day}.${month}.${year}`;
-    };
-    
-    // Format time as HH:MM
-    const formatTime = (dateString) => {
-        const date = new Date(dateString);
         const hours = String(date.getHours()).padStart(2, '0');
         const minutes = String(date.getMinutes()).padStart(2, '0');
-        return `${hours}:${minutes}`;
+        return `${day}.${month}.${year} ${hours}:${minutes}`;
     };
 
-    // Format date and time for Excel (YYYY-MM-DD HH:MM)
-    const excelDateTime = (dateString) => {
-        const date = new Date(dateString);
-        const year = date.getFullYear();
-        const month = String(date.getMonth() + 1).padStart(2, '0');
-        const day = String(date.getDate()).padStart(2, '0');
-        const hours = String(date.getHours()).padStart(2, '0');
-        const minutes = String(date.getMinutes()).padStart(2, '0');
-        return `${year}-${month}-${day} ${hours}:${minutes}`;
+    // Escape CSV values (handles quotes and special characters)
+    const escapeCsv = (value) => {
+        if (value === null || value === undefined) return '';
+        const stringValue = String(value);
+        // Escape double quotes by doubling them
+        const escaped = stringValue.replace(/"/g, '""');
+        // Wrap in quotes if contains comma, newline, or quote
+        if (escaped.includes(',') || escaped.includes('\n') || escaped.includes('"')) {
+            return `"${escaped}"`;
+        }
+        return escaped;
     };
 
-    // Create CSV content with semicolon as delimiter for better Excel compatibility
-    const headers = [
-        'Řidič', 
-        'Vozidlo', 
-        'Začátek rezervace', 
-        'Konec rezervace', 
-        'Doba trvání',
-        'Účel cesty'
-    ];
+    // Create CSV content
+    const headers = ['Řidič', 'Vozidlo', 'Od', 'Do', 'Účel'];
     
-    const csvContent = [
-        headers.join(';'),
+    const csvRows = [
+        headers.join(';'), // Header row
         ...dataToExport.map(res => {
-            const start = new Date(res.start);
-            const end = new Date(res.end);
-            
-            return [
-                `"${res.driverName || 'Neznámý řidič'}"`,
-                `"${res.vehicle || 'Neznámé vozidlo'}"`,
-                `"${excelDateTime(start)}"`,
-                `"${excelDateTime(end)}"`,
-                `"${calculateDuration(res)}"`,
-                `"${res.purpose || 'Nespecifikováno'}"`
-            ].join(';');
+            const row = [
+                escapeCsv(res.driverName || ''),
+                escapeCsv(res.vehicle || ''),
+                escapeCsv(formatDateTime(res.start)),
+                escapeCsv(formatDateTime(res.end)),
+                escapeCsv(res.purpose || '')
+            ];
+            return row.join(';');
         })
-    ].join('\r\n');
+    ];
 
-    // Create and trigger download with proper encoding for Excel
-    const blob = new Blob([
-        '\ufeff', // UTF-8 BOM for Excel
-        csvContent
-    ], { 
-        type: 'text/csv;charset=utf-8;' 
-    });
+    // Create CSV string with BOM for Excel
+    const csvString = '\uFEFF' + csvRows.join('\r\n');
     
+    // Create and trigger download
+    const blob = new Blob([csvString], { type: 'text/csv;charset=utf-8;' });
     const link = document.createElement('a');
-    const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
+    const timestamp = new Date().toISOString().split('T')[0];
+    
     link.href = URL.createObjectURL(blob);
     link.download = `rezervace_${timestamp}.csv`;
     link.style.display = 'none';
+    
     document.body.appendChild(link);
     link.click();