look ahead

lib/services/storage_service.dart

@@ -3,6 +3,7 @@ library;
 
 import 'dart:convert';
 
+import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import '../models/bank.dart';
@@ -16,6 +17,7 @@ class TxMetaStoreData {
     this.labelsByMerchant = const {},
     this.notesByMerchant = const {},
     this.exactTemplates = const {},
+    this.recurringTemplates = const {},
     this.customLabels = const [],
     this.labelParents = const {},
   });
@@ -24,6 +26,7 @@ class TxMetaStoreData {
   final Map<String, List<String>> labelsByMerchant;
   final Map<String, String> notesByMerchant;
   final Map<String, TxExactTemplate> exactTemplates;
+  final Map<String, RecurringTemplate> recurringTemplates;
   final List<TxLabel> customLabels;
 
   /// childLabelId → parentLabelId (roots omitted).
@@ -147,8 +150,9 @@ class StorageService {
     }
   }
 
-  Future<void> saveBankCache(BankCache cache) {
-    return _prefs.setString(StorageKeys.bankCache, jsonEncode(cache.toJson()));
+  Future<void> saveBankCache(BankCache cache) async {
+    final json = await compute(jsonEncode, cache.toJson());
+    await _prefs.setString(StorageKeys.bankCache, json);
   }
 
   Future<void> clearBankCache() {
@@ -170,7 +174,7 @@ class StorageService {
     }
   }
 
-  Future<void> saveImportedTransactions(List<BankTransaction> txs) {
+  Future<void> saveImportedTransactions(List<BankTransaction> txs) async {
     final encoded = [
       for (final tx in txs)
         {
@@ -181,10 +185,8 @@ class StorageService {
           'pending': tx.pending,
         },
     ];
-    return _prefs.setString(
-      StorageKeys.importedTransactions,
-      jsonEncode(encoded),
-    );
+    final json = await compute(jsonEncode, encoded);
+    await _prefs.setString(StorageKeys.importedTransactions, json);
   }
 
   Future<void> clearImportedTransactions() {
@@ -225,7 +227,7 @@ class StorageService {
     }
   }
 
-  Future<void> saveTxMetaStore(TxMetaStoreData store) {
+  Future<void> saveTxMetaStore(TxMetaStoreData store) async {
     final encoded = {
       'byId': {
         for (final e in store.byId.entries) e.key: e.value.toJson(),
@@ -247,12 +249,18 @@ class StorageService {
       'exactTemplates': {
         for (final e in store.exactTemplates.entries) e.key: e.value.toJson(),
       },
+      'recurringTemplates': {
+        for (final e in store.recurringTemplates.entries)
+          e.key: e.value.toJson(),
+      },
       'customLabels': [
         for (final label in store.customLabels) label.toJson(),
       ],
       'labelParents': store.labelParents,
     };
-    return _prefs.setString(StorageKeys.txMeta, jsonEncode(encoded));
+    // jsonEncode of large annotation maps is CPU-heavy — keep it off the UI isolate.
+    final json = await compute(jsonEncode, encoded);
+    await _prefs.setString(StorageKeys.txMeta, json);
   }
 
   TxMetaStoreData _decodeStore(String raw) {
@@ -326,6 +334,19 @@ class StorageService {
         });
       }
 
+      final recurringTemplates = <String, RecurringTemplate>{};
+      final recurringRaw = root['recurringTemplates'];
+      if (recurringRaw is Map) {
+        recurringRaw.forEach((key, value) {
+          if (key is String && value is Map) {
+            final tpl =
+                RecurringTemplate.fromJson(Map<String, dynamic>.from(value));
+            if (tpl.id.isEmpty) return;
+            recurringTemplates[tpl.id.isNotEmpty ? tpl.id : key] = tpl;
+          }
+        });
+      }
+
       final customLabels = <TxLabel>[];
       final customs = root['customLabels'];
       if (customs is List) {
@@ -365,6 +386,7 @@ class StorageService {
         labelsByMerchant: labelsByMerchant,
         notesByMerchant: notesByMerchant,
         exactTemplates: exactTemplates,
+        recurringTemplates: recurringTemplates,
         customLabels: customLabels,
         labelParents: labelParents,
       );