Initial project import

2026-07-24 23:11:20 +08:00
commit 6396eabb87
372 changed files with 49682 additions and 0 deletions
@@ -0,0 +1,130 @@
+import 'dart:convert';
+
+import 'package:archive/archive.dart';
+import 'package:miaoji_zhang/shared/services/local_database.dart';
+import 'package:miaoji_zhang/shared/services/session_store.dart';
+
+class LocalExportService {
+  const LocalExportService._();
+
+  static List<int> buildZip() {
+    final snapshot = LocalDatabase.instance.exportSnapshot();
+    final session = SessionStore.instance;
+    return buildZipFromSnapshot(
+      snapshot,
+      profile: {
+        'mode': session.isGuest ? 'guest' : 'account',
+        'userId': session.userId,
+        'username': session.username,
+        'nickname': session.nickname,
+      },
+    );
+  }
+
+  static List<int> buildZipFromSnapshot(
+    Map<String, dynamic> snapshot, {
+    Map<String, dynamic> profile = const {},
+  }) {
+    final document = <String, dynamic>{...snapshot, 'profile': profile};
+    final ledgers = _indexById(snapshot['ledgers'] as List<dynamic>);
+    final categories = _indexById(snapshot['categories'] as List<dynamic>);
+    final transactions = (snapshot['transactions'] as List<dynamic>)
+        .cast<Map<String, dynamic>>();
+    final budgets = (snapshot['budgets'] as List<dynamic>)
+        .cast<Map<String, dynamic>>();
+
+    final archive = Archive();
+    archive.addFile(
+      ArchiveFile.bytes(
+        'transactions.csv',
+        _utf8Bom(
+          _csv([
+            const [
+              'id',
+              'ledger',
+              'type',
+              'amount',
+              'category',
+              'note',
+              'payment_method',
+              'source',
+              'occurred_at',
+              'is_deleted',
+              'updated_at',
+            ],
+            for (final item in transactions)
+              [
+                item['id'],
+                ledgers[item['ledgerId']]?['name'],
+                item['type'],
+                (item['amount'] as num).toStringAsFixed(2),
+                item['categoryName'],
+                item['note'],
+                item['paymentMethod'],
+                item['source'],
+                item['occurredAt'],
+                item['isDeleted'],
+                item['updatedAt'],
+              ],
+          ]),
+        ),
+      ),
+    );
+    archive.addFile(
+      ArchiveFile.bytes(
+        'budgets.csv',
+        _utf8Bom(
+          _csv([
+            const [
+              'ledger',
+              'period',
+              'category',
+              'amount',
+              'recurring',
+              'updated_at',
+            ],
+            for (final item in budgets)
+              [
+                ledgers[item['ledgerId']]?['name'],
+                item['period'],
+                item['categoryId'] == null
+                    ? 'total'
+                    : categories[item['categoryId']]?['name'],
+                (item['amount'] as num).toStringAsFixed(2),
+                item['recurring'],
+                item['updatedAt'],
+              ],
+          ]),
+        ),
+      ),
+    );
+    archive.addFile(
+      ArchiveFile.string(
+        'jizhi-backup.json',
+        const JsonEncoder.withIndent('  ').convert(document),
+      ),
+    );
+    return ZipEncoder().encode(archive);
+  }
+
+  static Map<int, Map<String, dynamic>> _indexById(List<dynamic> items) => {
+    for (final item in items.cast<Map<String, dynamic>>())
+      item['id'] as int: item,
+  };
+
+  static List<int> _utf8Bom(String value) => [
+    0xef,
+    0xbb,
+    0xbf,
+    ...utf8.encode(value),
+  ];
+
+  static String _csv(List<List<Object?>> rows) =>
+      rows.map((row) => row.map(_csvCell).join(',')).join('\r\n');
+
+  static String _csvCell(Object? value) {
+    final text = value?.toString() ?? '';
+    if (!text.contains(RegExp('[,"\r\n]'))) return text;
+    return '"${text.replaceAll('"', '""')}"';
+  }
+}