fix: deduplicate UIDs during iCal import to prevent mass failures #113

components/calendar/ical-import-modal.tsx

@@ -18,7 +18,7 @@ interface ICalImportModalProps {
   onClose: () => void;
 }
 
-const MAX_FILE_SIZE = 5 * 1024 * 1024; // 5MB
+const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
 const ACCEPTED_EXTENSIONS = [".ics", ".ical"];
 
 type ImportStep = "select" | "preview" | "importing";

locales/de/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Termine werden importiert...",
       "success": "{count} Termine erfolgreich importiert",
       "error": "Kalender konnte nicht importiert werden",
-      "file_too_large": "Datei überschreitet das 5-MB-Limit",
+      "file_too_large": "Datei überschreitet das 10-MB-Limit",
       "invalid_format": "Ungültiges Kalenderdateiformat"
     },
     "management": {

locales/en/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Importing events...",
       "success": "{count} events imported successfully",
       "error": "Failed to import calendar",
-      "file_too_large": "File exceeds 5MB limit",
+      "file_too_large": "File exceeds 10MB limit",
       "invalid_format": "Invalid calendar file format"
     },
     "management": {

locales/es/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Importando eventos...",
       "success": "{count} eventos importados correctamente",
       "error": "Error al importar el calendario",
-      "file_too_large": "El archivo supera el límite de 5 MB",
+      "file_too_large": "El archivo supera el límite de 10 MB",
       "invalid_format": "Formato de archivo de calendario no válido"
     },
     "management": {

locales/fr/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Importation en cours...",
       "success": "{count} événements importés avec succès",
       "error": "Échec de l'importation du calendrier",
-      "file_too_large": "Le fichier dépasse la limite de 5 Mo",
+      "file_too_large": "Le fichier dépasse la limite de 10 Mo",
       "invalid_format": "Format de fichier calendrier invalide"
     },
     "management": {

locales/it/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Importazione eventi...",
       "success": "{count} eventi importati con successo",
       "error": "Importazione del calendario fallita",
-      "file_too_large": "Il file supera il limite di 5 MB",
+      "file_too_large": "Il file supera il limite di 10 MB",
       "invalid_format": "Formato del file calendario non valido"
     },
     "management": {

locales/ja/common.json

@@ -2057,7 +2057,7 @@
       "importing": "イベントをインポート中...",
       "success": "{count}件のイベントをインポートしました",
       "error": "カレンダーのインポートに失敗しました",
-      "file_too_large": "ファイルサイズが5MBを超えています",
+      "file_too_large": "ファイルサイズが10MBを超えています",
       "invalid_format": "無効なカレンダーファイル形式"
     },
     "management": {

locales/nl/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Evenementen importeren...",
       "success": "{count} evenementen succesvol geïmporteerd",
       "error": "Agenda importeren mislukt",
-      "file_too_large": "Bestand overschrijdt de limiet van 5 MB",
+      "file_too_large": "Bestand overschrijdt de limiet van 10 MB",
       "invalid_format": "Ongeldig agendabestandsformaat"
     },
     "management": {

locales/pt/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Importando eventos...",
       "success": "{count} eventos importados com sucesso",
       "error": "Falha ao importar calendário",
-      "file_too_large": "Arquivo excede o limite de 5 MB",
+      "file_too_large": "Arquivo excede o limite de 10 MB",
       "invalid_format": "Formato de arquivo de calendário inválido"
     },
     "management": {

locales/ru/common.json

@@ -2057,7 +2057,7 @@
       "importing": "Импортирование событий...",
       "success": "{count} событий успешно импортировано",
       "error": "Не удалось импортировать календарь",
-      "file_too_large": "Файл превышает лимит 5 МБ",
+      "file_too_large": "Файл превышает лимит 10 МБ",
       "invalid_format": "Неверный формат файла календаря"
     },
     "management": {

stores/calendar-store.ts

@@ -383,9 +383,28 @@ export const useCalendarStore = create<CalendarStore>()(
         const realCalendarId = cal?.originalId || calendarId;
         const targetAccountId = cal?.accountId;
 
+        // Deduplicate: skip events whose UIDs already exist on the server
+        // (Stalwart enforces UID uniqueness across all calendars)
+        let eventsToProcess = events;
+        try {
+          const allServerEvents = await client.getCalendarEvents(undefined, targetAccountId);
+          const existingUids = new Set<string>();
+          for (const e of allServerEvents) {
+            if (e.uid) existingUids.add(e.uid);
+          }
+          const before = eventsToProcess.length;
+          eventsToProcess = eventsToProcess.filter(e => !e.uid || !existingUids.has(e.uid));
+          const skipped = before - eventsToProcess.length;
+          if (skipped > 0) {
+            debug.log(`Import: skipped ${skipped} events with duplicate UIDs (already on server)`);
+          }
+        } catch (error) {
+          debug.warn('Could not fetch existing events for deduplication, proceeding without:', error);
+        }
+
         // Prepare all events for batch creation
         const prepared: Partial<CalendarEvent>[] = [];
-        for (const event of events) {
+        for (const event of eventsToProcess) {
           const src = sanitizeOutgoingCalendarEventData(event as Partial<CalendarEvent>);
           let cleanParticipants: Record<string, CalendarParticipant> | null = null;
           if (src.participants) {