Midtrans as a Dart class

1 files changed, 70 insertions, 10 deletions

diff --git a/midtrans.dart b/midtrans.dart
index 1133d78..c70c55e 100644
--- a/midtrans.dart
+++ b/midtrans.dart
@@ -1,3 +1,9 @@
+import 'dart:ffi';
+import 'dart:io';
+
+import 'package:ffi/ffi.dart';
+import 'package:path/path.dart' as path;
+
 class MidtransTransaction extends Struct {
 	external Pointer<Utf8> order_id;
 
@@ -5,17 +11,71 @@ class MidtransTransaction extends Struct {
 	external long gross_amount;
 }
 
-typedef MidtransInitNative = Void Function(Pointer<Utf8> apiKey,
-	Pointer<Utf8> caInfo)
-typedef MidtransInit = void Function(Pointer<Utf8> apiKey, Pointer<Utf8> caInfo)
+class MidtransBanktransfer extends Struct {
+	external Pointer<Utf8> bank;
+	external Pointer<Utf8> va_number;
+	external Pointer<Utf8> bca;
+	external Pointer<Utf8> permata;
+}
+
+class Midtrans {
+	final DynamicLibrary dylib;
+
+	Midtrans(String apiKey, String caInfo) {
+		dylib = Platform.isAndroid
+			? DynamicLibrary.open('libmidtrans.so')
+			: DynamicLibrary.process();
 
-typedef MidtransChargeNative = Void Function(Int32 type, Pointer<Void>,
-	Pointer<MidtransTransaction>, Array<Pointer<Utf8>>)
-typedef MidtransCharge = void Function(int type, Pointer<Void>,
-	Pointer<MidtransTransaction>, Array<Pointer<Utf8>>)
+		final apiKeyUtf8 = apiKey.toNativeUtf8();
+		final caInfoUtf8 = caInfo.toNativeUtf8();
+		final midtrans_init = dylib.lookupFunction
+			<Void Function(Pointer<Utf8>, Pointer<Utf8>),
+			void Function(Pointer<Utf8>, Pointer<Utf8>)>
+				('midtrans_init');
+		midtrans_init(apiKeyUtf8, caInfoUtf8);
+		calloc.free(apiKeyUtf8);
+		calloc.free(caInfoUtf8);
+	}
 
-typedef MidtransCleanupNative = Void Function()
-typedef MidtransCleanup = void Function()
+	void charge<T extends Struct>(Pointer<T> payment,
+			Pointer<MidtransTransaction> transaction,
+			Array<Pointer<Utf8>> customFields) {
+		if (payment is MidtransBanktransfer) {
+			final midtrans_charge = dylib.lookupFunction
+				<Void Function(Pointer<MidtransBanktransfer>,
+						Pointer<MidtransTransaction>,
+						Array<Pointer<Utf8>>),
+			void Function(Pointer<MidtransBanktransfer>,
+					Pointer<MidtransTransaction>,
+					Array<Pointer<Utf8>>)>
+				('midtrans_charge_banktransfer');
+			midtrans_charge(payment, transaction, customFields);
+			calloc.free((payment as MidtransBanktransfer).bank);
+			if ((payment as MidtransBanktransfer).va_number
+					!= null) {
+				calloc.free((payment as MidtransBanktransfer)
+						.va_number);
+			}
+			if ((payment as MidtransBanktransfer).bca != null) {
+				calloc.free((payment as MidtransBanktransfer)
+						.bca);
+			}
+			if ((payment as MidtransBanktransfer).permata != null) {
+				calloc.free((payment as MidtransBanktransfer)
+						.permata);
+			}
+		}
+		calloc.free(transaction.order_id);
+		for (var i = 0; i < 6; i++) {
+			if (customFields[i] != null) {
+				calloc.free(customFields[i]);
+			}
+		}
+	}
 
-void main() {
+	void cleanup() {
+		final midtrans_cleanup = dylib.lookupFunction<Void Function(),
+		      void Function()>('midtrans_cleanup');
+		midtrans_cleanup();
+	}
 }