stacked bar graph, edit / remove transaction & budget page base

lib/pages/transactions/widgets/transaction_add_dialog.dart

@@ -1,40 +1,60 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:tunas/domains/account/account_bloc.dart';
-import 'package:tunas/pages/transactions/widgets/transaction_add_form.dart';
+import 'package:tunas/pages/transactions/widgets/transaction_form.dart';
+import 'package:tunas/repositories/account/models/transaction.dart';
 
 class TransactionAddDialog extends StatelessWidget {
   const TransactionAddDialog({super.key});
 
-  static void show(BuildContext context) => showDialog(
-    context: context,
-    barrierDismissible: false,
-    useRootNavigator: false,
-    builder: (_) => BlocProvider.value(
-      value: BlocProvider.of<AccountBloc>(context),
-      child: const TransactionAddDialog()
-    )
-  );
+  static void show(BuildContext context, Transaction? transaction) {
+    context.read<AccountBloc>().add(TransactionSetCurrent(transaction));
+    showDialog(
+      context: context,
+      barrierDismissible: false,
+      useRootNavigator: false,
+      builder: (_) => BlocProvider.value(
+        value: BlocProvider.of<AccountBloc>(context),
+        child: const TransactionAddDialog()
+      )
+    );
+  }
 
   static void hide(BuildContext context) => Navigator.pop(context);
 
+  _computeActions(BuildContext context, Transaction? currentTransaction) {
+    final actions = [
+      IconButton(
+        onPressed: () => TransactionAddDialog.hide(context),
+        icon: const Icon(Icons.close)
+      ),
+      IconButton(
+        onPressed: () => context.read<AccountBloc>().add(const TransactionAdd()),
+        icon: const Icon(Icons.save)
+      ),
+    ];
+
+    if (currentTransaction != null) {
+      actions.add(IconButton(
+        onPressed: () => context.read<AccountBloc>().add(const TransactionDeleteCurrent()),
+        icon: const Icon(Icons.delete)
+      ));
+    }
+
+    return actions;
+  }
+
   @override
   Widget build(BuildContext context) {
-    return AlertDialog(
-      title: Text('Add transaction'),
-      actions: [
-        TextButton(
-          onPressed: () => TransactionAddDialog.hide(context),
-          child: Text('Close')
-        ),
-        TextButton(
-          onPressed: () => context.read<AccountBloc>().add(TransactionAdd()),
-          child: Text('Add')
-        ),
-      ],
-      content: SizedBox(
-        height: 400,
-        child: TransactionAddForm(),
+    return BlocBuilder<AccountBloc, AccountState>(
+      buildWhen: (previous, current) => previous.currentTransaction != current.currentTransaction,
+      builder: (context, state) => AlertDialog(
+        title: Text(state.currentTransaction == null ? 'Add Transaction' : 'Edit Transaction'),
+        actions: _computeActions(context, state.currentTransaction),
+        content: const SizedBox(
+          height: 400,
+          child: TransactionForm(),
+        )
       )
     );
   }