api work

veilid-flutter/lib/veilid_table_db.dart

@@ -0,0 +1,59 @@
+import 'dart:async';
+import 'dart:typed_data';
+import 'dart:convert';
+
+/////////////////////////////////////
+/// VeilidTableDB
+abstract class VeilidTableDBTransaction {
+  Future<void> commit();
+  Future<void> rollback();
+  Future<void> store(int col, Uint8List key, Uint8List value);
+  Future<bool> delete(int col, Uint8List key);
+
+  Future<void> storeJson(int col, Uint8List key, Object? object,
+      {Object? Function(Object? nonEncodable)? toEncodable}) async {
+    return store(col, key,
+        utf8.encoder.convert(jsonEncode(object, toEncodable: toEncodable)));
+  }
+
+  Future<void> storeStringJson(int col, String key, Object? object,
+      {Object? Function(Object? nonEncodable)? toEncodable}) {
+    return storeJson(col, utf8.encoder.convert(key), object,
+        toEncodable: toEncodable);
+  }
+}
+
+abstract class VeilidTableDB {
+  int getColumnCount();
+  List<Uint8List> getKeys(int col);
+  VeilidTableDBTransaction transact();
+  Future<void> store(int col, Uint8List key, Uint8List value);
+  Future<Uint8List?> load(int col, Uint8List key);
+  Future<bool> delete(int col, Uint8List key);
+
+  Future<void> storeJson(int col, Uint8List key, Object? object,
+      {Object? Function(Object? nonEncodable)? toEncodable}) {
+    return store(col, key,
+        utf8.encoder.convert(jsonEncode(object, toEncodable: toEncodable)));
+  }
+
+  Future<void> storeStringJson(int col, String key, Object? object,
+      {Object? Function(Object? nonEncodable)? toEncodable}) {
+    return storeJson(col, utf8.encoder.convert(key), object,
+        toEncodable: toEncodable);
+  }
+
+  Future<Object?> loadJson(int col, Uint8List key,
+      {Object? Function(Object? key, Object? value)? reviver}) async {
+    var s = await load(col, key);
+    if (s == null) {
+      return null;
+    }
+    return jsonDecode(utf8.decode(s, allowMalformed: false), reviver: reviver);
+  }
+
+  Future<Object?> loadStringJson(int col, String key,
+      {Object? Function(Object? key, Object? value)? reviver}) {
+    return loadJson(col, utf8.encoder.convert(key), reviver: reviver);
+  }
+}