prasule/lib/api/wallet_manager.dart

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import 'dart:convert';
import 'dart:io';
import 'package:path_provider/path_provider.dart';
import 'package:prasule/api/wallet.dart';
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import 'package:prasule/main.dart';
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/// Used for [Wallet]-managing operations
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class WalletManager {
/// Returns a list of all [Wallet]s
static Future<List<Wallet>> listWallets() async {
final path =
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Directory("${(await getApplicationDocumentsDirectory()).path}/wallets");
if (!path.existsSync()) {
path.createSync();
}
final wallets = <Wallet>[];
for (final w
in path.listSync().map((e) => e.path.split("/").last).toList()) {
try {
wallets.add(await loadWallet(w));
} catch (e) {
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logger.e(e);
// TODO: do something with unreadable wallets
}
}
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logger.i(wallets.length);
return wallets;
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}
/// Loads and returns a single [Wallet] by name
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static Future<Wallet> loadWallet(String name) async {
final path =
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Directory("${(await getApplicationDocumentsDirectory()).path}/wallets");
final wallet = File("${path.path}/$name");
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if (!path.existsSync()) {
path.createSync();
}
if (!wallet.existsSync()) {
return Future.error("Wallet does not exist");
}
return Wallet.fromJson(
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jsonDecode(wallet.readAsStringSync()) as Map<String, dynamic>,
);
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}
/// Converts [Wallet] to JSON and saves it to AppData
static Future<bool> saveWallet(Wallet w) async {
final path =
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Directory("${(await getApplicationDocumentsDirectory()).path}/wallets");
final wallet = File("${path.path}/${w.name}");
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if (!path.existsSync()) {
path.createSync();
}
// if (!wallet.existsSync()) return false;
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wallet.writeAsStringSync(jsonEncode(w.toJson()));
return true;
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}
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/// Deletes the corresponding [Wallet] file
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static Future<void> deleteWallet(Wallet w) async {
final path =
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Directory("${(await getApplicationDocumentsDirectory()).path}/wallets");
File("${path.path}/${w.name}").deleteSync();
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}
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}