feat: add persistent conversation feature with cross-platform file restoration

electron/main.cjs

@@ -182,7 +182,11 @@ ipcMain.handle('dialog:openFile', async () => {
 	return {
 		path: filePath,
 		name: fileName,
-		buffer: fileContent.buffer,
+		// Slice the buffer to avoid sending the entire Node.js Buffer pool
+		buffer: fileContent.buffer.slice(
+			fileContent.byteOffset,
+			fileContent.byteOffset + fileContent.byteLength,
+		),
 	};
 });
 
@@ -227,6 +231,57 @@ ipcMain.handle('fs:fileExists', async (_event, filePath) => {
 	return fs.existsSync(filePath);
 });
 
+// Read file from absolute path (for persistence)
+ipcMain.handle('file:readFromPath', async (_event, filePath) => {
+	try {
+		if (typeof filePath !== 'string') {
+			return { success: false, error: 'Invalid file path' };
+		}
+		const normalized = path.resolve(filePath);
+		// Require absolute path and reject path traversal segments
+		if (!path.isAbsolute(filePath)) {
+			return { success: false, error: 'Invalid file path' };
+		}
+		if (filePath.split(/[/\\]+/).includes('..')) {
+			return { success: false, error: 'Invalid file path' };
+		}
+		if (path.extname(normalized).toLowerCase() !== '.zip') {
+			return { success: false, error: 'Only .zip files are allowed' };
+		}
+
+		// Pre-check with lstat to reject symlinks (works cross-platform including Windows)
+		const lst = await fs.promises.lstat(normalized);
+		if (!lst.isFile() || lst.isSymbolicLink()) {
+			return { success: false, error: 'Path is not a regular file' };
+		}
+
+		// Use O_NOFOLLOW when available to reject symlinks atomically (not supported on Windows)
+		const openFlags =
+			typeof fs.constants.O_NOFOLLOW === 'number'
+				? fs.constants.O_RDONLY | fs.constants.O_NOFOLLOW
+				: fs.constants.O_RDONLY;
+		const fd = await fs.promises.open(normalized, openFlags);
+		try {
+			const content = await fd.readFile();
+			return {
+				success: true,
+				buffer: content.buffer.slice(
+					content.byteOffset,
+					content.byteOffset + content.byteLength,
+				),
+				name: path.basename(normalized),
+			};
+		} finally {
+			await fd.close();
+		}
+	} catch (error) {
+		return {
+			success: false,
+			error: error instanceof Error ? error.message : String(error),
+		};
+	}
+});
+
 ipcMain.handle('shell:openExternal', async (_event, url) => {
 	// Validate URL before opening
 	if (!url.startsWith('https://github.com/rodrigogs/whats-reader')) {

electron/preload.cjs

@@ -12,6 +12,10 @@ contextBridge.exposeInMainWorld('electronAPI', {
 	readDir: (dirPath) => ipcRenderer.invoke('fs:readDir', dirPath),
 	fileExists: (filePath) => ipcRenderer.invoke('fs:fileExists', filePath),
 
+	// Persistence file operations
+	readFileFromPath: (filePath) =>
+		ipcRenderer.invoke('file:readFromPath', filePath),
+
 	// External links
 	openExternal: (url) => ipcRenderer.invoke('shell:openExternal', url),
 

messages/de.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Nie Update-Benachrichtigungen anzeigen",
   "version_view_releases": "Versionen auf GitHub anzeigen",
   "close": "Schließen",
+  "close_modal": "Modal schließen",
   "update_ready": "Update bereit",
   "update_downloading": "Update wird heruntergeladen",
   "update_close": "Aktualisierungsbenachrichtigung schließen",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Andere",
   "media_gallery_clear_filter": "Filter löschen",
   "media_gallery_participant_search_placeholder": "Suche nach Name oder Nummer...",
-  "media_gallery_participant_no_match": "Kein Teilnehmer entspricht \"{query}\""
-}
+  "persistence_remember_conversation": "Unterhaltung Merken",
+  "persistence_conversation_saved": "Die Unterhaltung wird gespeichert",
+  "persistence_conversation_removed": "Unterhaltung aus gespeicherten Sitzungen entfernt",
+  "persistence_restore_title": "Gespeicherte Unterhaltungen Wiederherstellen",
+  "persistence_restore_description": "Sie haben gespeicherte Unterhaltungen aus früheren Sitzungen:",
+  "persistence_restore_button": "Ausgewählte Wiederherstellen ({count})",
+  "persistence_start_fresh": "Neu Beginnen",
+  "persistence_dont_show_again": "Nicht mehr anzeigen",
+  "persistence_last_opened": "Zuletzt geöffnet: {date}",
+  "persistence_message_count": "{count} Nachrichten",
+  "persistence_reselect_title": "Bitte Datei Erneut Auswählen",
+  "persistence_reselect_description": "Um \"{chatTitle}\" wiederherzustellen, wählen Sie bitte die Originaldatei aus:",
+  "persistence_skip": "Überspringen",
+  "persistence_select_all": "Alle auswählen",
+  "persistence_deselect_all": "Alle abwählen",
+  "persistence_drop_zip": "WhatsApp-ZIP-Datei hier ablegen",
+  "persistence_or_browse": "oder klicken Sie unten zum Durchsuchen",
+  "persistence_browse_files": "Dateien durchsuchen",
+  "persistence_save_failed": "Fehler beim Speichern der Unterhaltung",
+  "persistence_restore_failed": "Fehler beim Wiederherstellen der Unterhaltung",
+  "persistence_remove_failed": "Fehler beim Entfernen der Unterhaltung",
+  "close_notification": "Benachrichtigung schließen"
+}

messages/en.json

@@ -231,6 +231,7 @@
   "calendar_weekday_fri": "Fr",
   "calendar_weekday_sat": "Sa",
   "close": "Close",
+  "close_modal": "Close modal",
   "media_gallery_options": "Options",
   "media_gallery_filter_by_participant": "Filter by participant",
   "media_gallery_filter_by_type": "Filter by type",
@@ -241,5 +242,27 @@
   "media_gallery_type_other": "Other",
   "media_gallery_clear_filter": "Clear filter",
   "media_gallery_participant_search_placeholder": "Search by name or number...",
-  "media_gallery_participant_no_match": "No participant matches \"{query}\""
+  "media_gallery_participant_no_match": "No participant matches \"{query}\"",
+  "persistence_remember_conversation": "Remember Conversation",
+  "persistence_conversation_saved": "Conversation will be remembered",
+  "persistence_conversation_removed": "Conversation removed from saved sessions",
+  "persistence_restore_title": "Restore Saved Conversations",
+  "persistence_restore_description": "You have saved conversations from previous sessions:",
+  "persistence_restore_button": "Restore Selected ({count})",
+  "persistence_start_fresh": "Start Fresh",
+  "persistence_dont_show_again": "Don't show this again",
+  "persistence_last_opened": "Last opened: {date}",
+  "persistence_message_count": "{count} messages",
+  "persistence_reselect_title": "Please Re-select File",
+  "persistence_reselect_description": "To restore \"{chatTitle}\", please select the original file:",
+  "persistence_skip": "Skip",
+  "persistence_select_all": "Select All",
+  "persistence_deselect_all": "Deselect All",
+  "persistence_drop_zip": "Drop WhatsApp ZIP file here",
+  "persistence_or_browse": "or click below to browse",
+  "persistence_browse_files": "Browse Files",
+  "persistence_save_failed": "Failed to save conversation",
+  "persistence_restore_failed": "Failed to restore conversation",
+  "persistence_remove_failed": "Failed to remove conversation",
+  "close_notification": "Close notification"
 }

messages/es.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Nunca mostrar notificaciones de actualización",
   "version_view_releases": "Ver versiones en GitHub",
   "close": "Cerrar",
+  "close_modal": "Cerrar modal",
   "update_ready": "Actualización lista",
   "update_downloading": "Descargando actualización",
   "update_close": "Cerrar notificación de actualización",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Otro",
   "media_gallery_clear_filter": "Limpiar filtro",
   "media_gallery_participant_search_placeholder": "Buscar por nombre o número...",
-  "media_gallery_participant_no_match": "Ningún participante coincide con \"{query}\""
-}
+  "persistence_remember_conversation": "Recordar Conversación",
+  "persistence_conversation_saved": "La conversación será recordada",
+  "persistence_conversation_removed": "Conversación eliminada de las sesiones guardadas",
+  "persistence_restore_title": "Restaurar Conversaciones Guardadas",
+  "persistence_restore_description": "Tienes conversaciones guardadas de sesiones anteriores:",
+  "persistence_restore_button": "Restaurar Seleccionadas ({count})",
+  "persistence_start_fresh": "Empezar de Nuevo",
+  "persistence_dont_show_again": "No mostrar de nuevo",
+  "persistence_last_opened": "Última apertura: {date}",
+  "persistence_message_count": "{count} mensajes",
+  "persistence_reselect_title": "Por Favor, Selecciona el Archivo de Nuevo",
+  "persistence_reselect_description": "Para restaurar \"{chatTitle}\", selecciona el archivo original:",
+  "persistence_skip": "Omitir",
+  "persistence_select_all": "Seleccionar Todo",
+  "persistence_deselect_all": "Deseleccionar Todo",
+  "persistence_drop_zip": "Suelta el archivo ZIP de WhatsApp aquí",
+  "persistence_or_browse": "o haz clic abajo para buscar",
+  "persistence_browse_files": "Buscar Archivos",
+  "persistence_save_failed": "Error al guardar la conversación",
+  "persistence_restore_failed": "Error al restaurar la conversación",
+  "persistence_remove_failed": "Error al eliminar la conversación",
+  "close_notification": "Cerrar notificación"
+}

messages/fr.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Ne jamais afficher les notifications de mise à jour",
   "version_view_releases": "Voir les versions sur GitHub",
   "close": "Fermer",
+  "close_modal": "Fermer la boîte de dialogue",
   "update_ready": "Prêt pour la mise à jour",
   "update_downloading": "Téléchargement de la mise à jour",
   "update_close": "Fermer la notification de mise à jour",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Autre",
   "media_gallery_clear_filter": "Effacer le filtre",
   "media_gallery_participant_search_placeholder": "Recherche par nom ou numéro...",
-  "media_gallery_participant_no_match": "Aucun participant ne correspond à \"{query}\""
-}
+  "persistence_remember_conversation": "Mémoriser la Conversation",
+  "persistence_conversation_saved": "La conversation sera mémorisée",
+  "persistence_conversation_removed": "Conversation supprimée des sessions enregistrées",
+  "persistence_restore_title": "Restaurer les Conversations Sauvegardées",
+  "persistence_restore_description": "Vous avez des conversations sauvegardées de sessions précédentes :",
+  "persistence_restore_button": "Restaurer la Sélection ({count})",
+  "persistence_start_fresh": "Repartir à Zéro",
+  "persistence_dont_show_again": "Ne plus afficher",
+  "persistence_last_opened": "Dernière ouverture : {date}",
+  "persistence_message_count": "{count} messages",
+  "persistence_reselect_title": "Veuillez Resélectionner le Fichier",
+  "persistence_reselect_description": "Pour restaurer \"{chatTitle}\", veuillez sélectionner le fichier original :",
+  "persistence_skip": "Ignorer",
+  "persistence_select_all": "Tout sélectionner",
+  "persistence_deselect_all": "Tout désélectionner",
+  "persistence_drop_zip": "Déposez le fichier ZIP WhatsApp ici",
+  "persistence_or_browse": "ou cliquez ci-dessous pour parcourir",
+  "persistence_browse_files": "Parcourir les fichiers",
+  "persistence_save_failed": "Échec de l'enregistrement de la conversation",
+  "persistence_restore_failed": "Échec de la restauration de la conversation",
+  "persistence_remove_failed": "Échec de la suppression de la conversation",
+  "close_notification": "Fermer la notification"
+}

messages/it.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Non mostrare mai notifiche di aggiornamento",
   "version_view_releases": "Visualizza le versioni su GitHub",
   "close": "Chiudi",
+  "close_modal": "Chiudi finestra modale",
   "update_ready": "Aggiornamento pronto",
   "update_downloading": "Download dell'aggiornamento",
   "update_close": "Chiudi notifica di aggiornamento",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Altro",
   "media_gallery_clear_filter": "Cancella filtro",
   "media_gallery_participant_search_placeholder": "Cerca per nome o numero...",
-  "media_gallery_participant_no_match": "Nessun partecipante corrisponde a \"{query}\""
-}
+  "persistence_remember_conversation": "Ricorda Conversazione",
+  "persistence_conversation_saved": "La conversazione verrà ricordata",
+  "persistence_conversation_removed": "Conversazione rimossa dalle sessioni salvate",
+  "persistence_restore_title": "Ripristina Conversazioni Salvate",
+  "persistence_restore_description": "Hai conversazioni salvate da sessioni precedenti:",
+  "persistence_restore_button": "Ripristina Selezionate ({count})",
+  "persistence_start_fresh": "Ricomincia da Zero",
+  "persistence_dont_show_again": "Non mostrare più",
+  "persistence_last_opened": "Ultima apertura: {date}",
+  "persistence_message_count": "{count} messaggi",
+  "persistence_reselect_title": "Seleziona Nuovamente il File",
+  "persistence_reselect_description": "Per ripristinare \"{chatTitle}\", seleziona il file originale:",
+  "persistence_skip": "Salta",
+  "persistence_select_all": "Seleziona tutto",
+  "persistence_deselect_all": "Deseleziona tutto",
+  "persistence_drop_zip": "Trascina qui il file ZIP di WhatsApp",
+  "persistence_or_browse": "o clicca sotto per sfogliare",
+  "persistence_browse_files": "Sfoglia file",
+  "persistence_save_failed": "Impossibile salvare la conversazione",
+  "persistence_restore_failed": "Impossibile ripristinare la conversazione",
+  "persistence_remove_failed": "Impossibile rimuovere la conversazione",
+  "close_notification": "Chiudi notifica"
+}

messages/ja.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "アップデート通知を表示しない",
   "version_view_releases": "GitHubでリリースを見る",
   "close": "閉じる",
+  "close_modal": "モーダルを閉じる",
   "update_ready": "アップデート準備完了",
   "update_downloading": "アップデートをダウンロード中",
   "update_close": "更新通知を閉じる",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "他の",
   "media_gallery_clear_filter": "フィルターをクリア",
   "media_gallery_participant_search_placeholder": "名前または番号で検索...",
-  "media_gallery_participant_no_match": "「{query}」に一致する参加者はいません"
-}
+  "persistence_remember_conversation": "会話を記憶",
+  "persistence_conversation_saved": "会話が記憶されます",
+  "persistence_conversation_removed": "保存済みセッションから会話が削除されました",
+  "persistence_restore_title": "保存済みの会話を復元",
+  "persistence_restore_description": "以前のセッションから保存された会話があります：",
+  "persistence_restore_button": "選択した会話を復元 ({count})",
+  "persistence_start_fresh": "新しく始める",
+  "persistence_dont_show_again": "今後表示しない",
+  "persistence_last_opened": "最終オープン: {date}",
+  "persistence_message_count": "{count} 件のメッセージ",
+  "persistence_reselect_title": "ファイルを再選択してください",
+  "persistence_reselect_description": "\"{chatTitle}\" を復元するには、元のファイルを選択してください：",
+  "persistence_skip": "スキップ",
+  "persistence_select_all": "すべて選択",
+  "persistence_deselect_all": "すべて解除",
+  "persistence_drop_zip": "WhatsAppのZIPファイルをここにドロップ",
+  "persistence_or_browse": "または下をクリックして参照",
+  "persistence_browse_files": "ファイルを参照",
+  "persistence_save_failed": "会話の保存に失敗しました",
+  "persistence_restore_failed": "会話の復元に失敗しました",
+  "persistence_remove_failed": "会話の削除に失敗しました",
+  "close_notification": "通知を閉じる"
+}

messages/nl.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Nooit updatemeldingen tonen",
   "version_view_releases": "Bekijk releases op GitHub",
   "close": "Sluiten",
+  "close_modal": "Venster sluiten",
   "update_ready": "Update gereed",
   "update_downloading": "Update downloaden",
   "update_close": "Sluit de updatemelding",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Ander",
   "media_gallery_clear_filter": "Filter wissen",
   "media_gallery_participant_search_placeholder": "Zoeken op naam of nummer...",
-  "media_gallery_participant_no_match": "Geen deelnemer komt overeen met \"{query}\""
-}
+  "persistence_remember_conversation": "Gesprek Onthouden",
+  "persistence_conversation_saved": "Het gesprek wordt onthouden",
+  "persistence_conversation_removed": "Gesprek verwijderd uit opgeslagen sessies",
+  "persistence_restore_title": "Opgeslagen Gesprekken Herstellen",
+  "persistence_restore_description": "U heeft opgeslagen gesprekken van eerdere sessies:",
+  "persistence_restore_button": "Geselecteerde Herstellen ({count})",
+  "persistence_start_fresh": "Opnieuw Beginnen",
+  "persistence_dont_show_again": "Niet meer tonen",
+  "persistence_last_opened": "Laatst geopend: {date}",
+  "persistence_message_count": "{count} berichten",
+  "persistence_reselect_title": "Selecteer het Bestand Opnieuw",
+  "persistence_reselect_description": "Om \"{chatTitle}\" te herstellen, selecteer het originele bestand:",
+  "persistence_skip": "Overslaan",
+  "persistence_select_all": "Alles selecteren",
+  "persistence_deselect_all": "Alles deselecteren",
+  "persistence_drop_zip": "WhatsApp ZIP-bestand hier neerzetten",
+  "persistence_or_browse": "of klik hieronder om te bladeren",
+  "persistence_browse_files": "Bestanden bladeren",
+  "persistence_save_failed": "Gesprek opslaan mislukt",
+  "persistence_restore_failed": "Gesprek herstellen mislukt",
+  "persistence_remove_failed": "Gesprek verwijderen mislukt",
+  "close_notification": "Melding sluiten"
+}

messages/pt.json

@@ -181,6 +181,7 @@
   "update_never_tooltip": "Nunca mostrar notificações de atualização",
   "version_view_releases": "Ver versões no GitHub",
   "close": "Fechar",
+  "close_modal": "Fechar modal",
   "update_ready": "Atualização pronta",
   "update_downloading": "Baixando atualização",
   "update_close": "Fechar notificação de atualização",
@@ -241,5 +242,26 @@
   "media_gallery_type_other": "Outro",
   "media_gallery_clear_filter": "Limpar filtro",
   "media_gallery_participant_search_placeholder": "Pesquisar por nome ou número...",
-  "media_gallery_participant_no_match": "Nenhum participante corresponde a \"{query}\""
-}
+  "persistence_remember_conversation": "Lembrar Conversa",
+  "persistence_conversation_saved": "A conversa será lembrada",
+  "persistence_conversation_removed": "Conversa removida das sessões salvas",
+  "persistence_restore_title": "Restaurar Conversas Salvas",
+  "persistence_restore_description": "Você tem conversas salvas de sessões anteriores:",
+  "persistence_restore_button": "Restaurar Selecionadas ({count})",
+  "persistence_start_fresh": "Começar do Zero",
+  "persistence_dont_show_again": "Não mostrar novamente",
+  "persistence_last_opened": "Última abertura: {date}",
+  "persistence_message_count": "{count} mensagens",
+  "persistence_reselect_title": "Por Favor, Selecione o Arquivo Novamente",
+  "persistence_reselect_description": "Para restaurar \"{chatTitle}\", selecione o arquivo original:",
+  "persistence_skip": "Pular",
+  "persistence_select_all": "Selecionar Tudo",
+  "persistence_deselect_all": "Desmarcar Tudo",
+  "persistence_drop_zip": "Solte o arquivo ZIP do WhatsApp aqui",
+  "persistence_or_browse": "ou clique abaixo para procurar",
+  "persistence_browse_files": "Procurar Arquivos",
+  "persistence_save_failed": "Falha ao salvar conversa",
+  "persistence_restore_failed": "Falha ao restaurar conversa",
+  "persistence_remove_failed": "Falha ao remover conversa",
+  "close_notification": "Fechar notificação"
+}