Allow deleting templates

lib/database/collections/recurrent.dart

@@ -15,4 +15,18 @@ class RecurringTransaction {
   final template = IsarLink<TransactionTemplate>();
 
   final account = IsarLink<Account>();
+
+  bool isDue(DateTime now) {
+    if (lastExecution == null) {
+      return true;
+    }
+
+    final expectedNextExecution = lastExecution!.add(Duration(days: days));
+    if (now.isAfter(expectedNextExecution)) {
+      return true;
+    }
+
+    return now.difference(expectedNextExecution).inDays.abs() <=
+        (days * 0.5).toInt();
+  }
 }

lib/database/database.dart

@@ -83,9 +83,7 @@ Stream<void> watchRecurringTransactions(Account account) {
 Future<void> upsertAccount(Account account) async {
   final db = GetIt.I.get<Isar>();
   return db.writeTxn(() async {
-    print("Before account insert");
-    final id = await db.accounts.put(account);
-    print("After account insert: $id");
+    await db.accounts.put(account);
   });
 }
 
@@ -116,6 +114,14 @@ Future<void> upsertTransactionTemplate(TransactionTemplate template) async {
   });
 }
 
+Future<void> deleteRecurringTransactionTemplate(RecurringTransaction template) {
+  final db = GetIt.I.get<Isar>();
+  return db.writeTxn(() async {
+    await db.transactionTemplates.delete(template.template.value!.id);
+    await db.recurringTransactions.delete(template.id);
+  });
+}
+
 Future<void> upsertRecurringTransaction(RecurringTransaction template) async {
   final db = GetIt.I.get<Isar>();
   return db.writeTxn(() async {
@@ -148,22 +154,24 @@ Stream<void> watchTransactionTemplates(Account account) {
       .watchLazy(fireImmediately: true);
 }
 
-Future<List<TransactionTemplate>> getTransactionTemplates(
-  Account? account,
-) async {
+Future<void> deleteTransactionTemplate(TransactionTemplate template) {
+  final db = GetIt.I.get<Isar>();
+  return db.writeTxn(() async {
+    await db.transactionTemplates.delete(template.id);
+  });
+}
+
+Future<List<TransactionTemplate>> getTransactionTemplates(Account? account) {
   if (account == null) {
     return Future.value([]);
   }
 
-  final a =
-      await GetIt.I
-          .get<Isar>()
-          .transactionTemplates
-          .filter()
-          .account((q) => q.idEqualTo(account.id))
-          .findAll();
-
-  return a;
+  return GetIt.I
+      .get<Isar>()
+      .transactionTemplates
+      .filter()
+      .account((q) => q.idEqualTo(account.id))
+      .findAll();
 }
 
 Stream<void> watchTransactions(Account account) {