feat: update ticket management and calendar functionality with improved data handling and local storage support

templates/admin-panel/calendar.php

@@ -35,6 +35,10 @@
 
 <script type="text/javascript">
   $(function() {
+    const storageKeys = {
+      selectedGroup: 'admin_calendar_selected_group',
+      visibleMonth: 'admin_calendar_visible_month'
+    };
     let enabledDatesSet = new Set();
 
     const calendarInstance = flatpickr("#admin-flatpickr", {
@@ -43,6 +47,12 @@
       dateFormat: "Y-m-d",
       disableMobile: true,
       locale: "pl",
+      onMonthChange: function() {
+        persistVisibleMonth();
+      },
+      onYearChange: function() {
+        persistVisibleMonth();
+      },
       onChange: function(selectedDates, dateStr, instance) {
         syncSetWithPicker(instance);
       }
@@ -62,7 +72,47 @@
     }
 
     function renderCurrentSetToPicker() {
+      const currentViewDate = new Date(calendarInstance.currentYear, calendarInstance.currentMonth, 1);
       calendarInstance.setDate(Array.from(enabledDatesSet), false, "Y-m-d");
+      calendarInstance.jumpToDate(currentViewDate, false);
+    }
+
+    function persistSelectedGroup() {
+      try {
+        localStorage.setItem(storageKeys.selectedGroup, getCurrentGroup());
+      } catch (error) {}
+    }
+
+    function restoreSelectedGroup() {
+      try {
+        const savedGroup = localStorage.getItem(storageKeys.selectedGroup);
+        if (!savedGroup) {
+          return;
+        }
+
+        if ($('#ticket_group option[value="' + savedGroup + '"]').length > 0) {
+          $('#ticket_group').val(savedGroup);
+        }
+      } catch (error) {}
+    }
+
+    function persistVisibleMonth() {
+      try {
+        const month = String(calendarInstance.currentMonth + 1).padStart(2, "0");
+        const year = String(calendarInstance.currentYear);
+        localStorage.setItem(storageKeys.visibleMonth, year + "-" + month);
+      } catch (error) {}
+    }
+
+    function restoreVisibleMonth() {
+      try {
+        const savedMonth = localStorage.getItem(storageKeys.visibleMonth);
+        if (!savedMonth || !/^\d{4}-\d{2}$/.test(savedMonth)) {
+          return;
+        }
+
+        calendarInstance.jumpToDate(savedMonth + "-01", false);
+      } catch (error) {}
     }
 
     function getCurrentGroup() {
@@ -77,16 +127,33 @@
       }
     }
 
+    function parseServerResponse(rawResponse) {
+      if (rawResponse && typeof rawResponse === 'object') {
+        return rawResponse;
+      }
+
+      try {
+        return JSON.parse(rawResponse);
+      } catch (error) {
+        return null;
+      }
+    }
+
     function fetchDatesForGroup() {
       $.ajax({
         type: 'POST',
         cache: false,
         url: '/apanel/calendar_dates/',
+        dataType: 'json',
         data: {
           ticket_group: getCurrentGroup()
         },
         success: function(rawResponse) {
-          const response = $.parseJSON(rawResponse);
+          const response = parseServerResponse(rawResponse);
+          if (!response) {
+            handleError('Nie udalo sie odczytac odpowiedzi serwera.');
+            return;
+          }
           if (response.status !== 'ok') {
             handleError(response.message || 'Nie udało się pobrać danych kalendarza.');
             return;
@@ -124,13 +191,18 @@
         type: 'POST',
         cache: false,
         url: '/apanel/calendar_save/',
+        dataType: 'json',
         data: {
           ticket_group: getCurrentGroup(),
           dates: Array.from(enabledDatesSet),
           csrf_token: $('#calendar_csrf_token').val()
         },
         success: function(rawResponse) {
-          const response = $.parseJSON(rawResponse);
+          const response = parseServerResponse(rawResponse);
+          if (!response) {
+            handleError('Nie udalo sie odczytac odpowiedzi serwera.');
+            return;
+          }
           if (response.status !== 'ok') {
             handleError(response.message || 'Nie udało się zapisać kalendarza.');
             return;
@@ -147,6 +219,7 @@
     }
 
     $('body').on('change', '#ticket_group', function() {
+      persistSelectedGroup();
       fetchDatesForGroup();
     });
 
@@ -162,6 +235,8 @@
       saveCalendar();
     });
 
+    restoreSelectedGroup();
+    restoreVisibleMonth();
     fetchDatesForGroup();
   });
 </script>