E-Channel charging (for Mandiri)

3 files changed, 107 insertions, 1 deletions

diff --git a/midtrans.c b/midtrans.c
index 8138a4a..ff79861 100644
--- a/midtrans.c
+++ b/midtrans.c
@@ -86,6 +86,12 @@ struct midtrans_banktransfer midtrans_banktransfer_new(char *bank)
 	return (struct midtrans_banktransfer){ bank, NULL, NULL, NULL };
 }
 
+struct midtrans_echannel midtrans_echannel_new(char *bill_info1,
+		char *bill_info2)
+{
+	return (struct midtrans_echannel){ bill_info1, bill_info2 };
+}
+
 struct midtrans_transaction midtrans_transaction_new(char *order_id,
 		long gross_amount)
 {
@@ -188,6 +194,64 @@ char *midtrans_charge_banktransfer(struct midtrans_banktransfer banktransfer,
 	return virtualaccount_number;
 }
 
+char *midtrans_charge_echannel(struct midtrans_echannel echannel,
+		struct midtrans_transaction transaction)
+{
+	static const char *url_tmpl = "%scharge";
+	char url[strlen(url_tmpl) - strlen("%s") + strlen(base_url) + 1];
+	sprintf(url, url_tmpl, base_url);
+	curl_easy_setopt(curl, CURLOPT_URL, url);
+
+	static const char *payment_tmpl = "echannel\",\n"
+		"\t\"echannel\": {\n"
+		"\t\t\"bill_info1\": \"%s\"%s,"
+		"\t\t\"bill_info2\": \"%s\"%s";
+	const size_t payment_len = strlen(payment_tmpl) - strlen("%s") * 4
+		+ strlen(echannel.bill_info1) + strlen(echannel.bill_info2);
+	char *payment = malloc(payment_len + 1);
+	sprintf(payment, payment_tmpl, echannel.bill_info1,
+			echannel.bill_info2);
+
+	static const char *post_tmpl =
+		"{\n"
+		"\t\"payment_type\": \"%s\n"
+		"\t},\n"
+		"\t\"transaction_details\": {\n"
+		"\t\t\"order_id\": \"%s\",\n"
+		"\t\t\"gross_amount\": %ld\n"
+		"\t}\n"
+		"}";
+	long gross_amount = transaction.gross_amount;
+	size_t gross_amount_len = 1;
+	while ((gross_amount /= 10))
+		gross_amount_len++;
+	char post[strlen(post_tmpl) - strlen("%s") * 3 - strlen("%ld")
+		+ payment_len + strlen(transaction.order_id) + gross_amount_len
+		+ 1];
+	sprintf(post, post_tmpl, payment, transaction.order_id,
+			transaction.gross_amount);
+	free(payment);
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post);
+
+	struct response res = { 0, NULL };
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &res);
+	curl_easy_perform(curl);
+
+	json_tokener *tokener = json_tokener_new();
+	json_object *status = json_tokener_parse_ex(tokener, res.data,
+			res.size);
+	free(res.data);
+
+	json_object *bill_key = NULL;
+	json_object_object_get_ex(status, "bill_key", &bill_key);
+	const char *string = json_object_get_string(bill_key);
+	char *key = malloc(strlen(string) + 1);
+	strcpy(key, string);
+	json_tokener_free(tokener);
+
+	return key;
+}
+
 char *midtrans_status(const char *order_id)
 {
 	static const char *tmpl = "%s%s/status";
diff --git a/midtrans.dart b/midtrans.dart
index 4c220d4..9b388d9 100644
--- a/midtrans.dart
+++ b/midtrans.dart
@@ -16,10 +16,19 @@ class MidtransBanktransfer extends Struct {
 	Pointer<Utf8> permata;
 }
 
+class MidtransEchannel extends Struct {
+	Pointer<Utf8> bill_info1;
+	Pointer<Utf8> bill_info2;
+}
+
 typedef MidtransStatus = Pointer<Utf8> Function(Pointer<Utf8>);
 typedef MidtransBanktransferNew = MidtransBanktransfer Function(Pointer<Utf8>);
+typedef MidtransEchannelNew = MidtransEchannel Function(Pointer<Utf8>,
+		Pointer<Utf8>);
 typedef MidtransChargeBanktransfer
 = Pointer<Utf8> Function(MidtransBanktransfer, MidtransTransaction);
+typedef MidtransChargeEchannel = Pointer<Utf8> Function(MidtransEchannel,
+		MidtransTransaction);
 
 class Midtrans {
 	final dylib = Platform.isAndroid ? DynamicLibrary.open('libmidtrans.so')
@@ -56,6 +65,28 @@ class Midtrans {
 		return vaNumber;
 	}
 
+	String chargeEchannel(String billInfo1, String billInfo2,
+			String orderID, int grossAmount) {
+		final bill_info1 = billInfo1.toNativeUtf8();
+		final bill_info2 = billInfo2.toNativeUtf8();
+		final order_id = orderID.toNativeUtf8();
+		final billKey = dylib.lookupFunction
+			<MidtransChargeEchannel, MidtransChargeEchannel>
+			('midtrans_charge_echannel')
+			(dylib.lookupFunction
+			 <MidtransEchannelNew, MidtransEchannelNew>
+			 ('midtrans_echannel_new')(bill_info1, bill_info2),
+			 dylib.lookupFunction
+			 <MidtransTransaction Function (Pointer<Utf8>, Long),
+			 MidtransTransaction Function (Pointer<Utf8>, int)>
+			 ('midtrans_transaction_new')(order_id, grossAmount))
+			.toDartString();
+		calloc.free(bill_info1);
+		calloc.free(bill_info2);
+		calloc.free(order_id);
+		return billKey;
+	}
+
 	String status(String orderID) {
 		final order_id = orderID.toNativeUtf8();
 		final status = dylib.lookupFunction
diff --git a/midtrans.h b/midtrans.h
index 37c35c2..d791045 100644
--- a/midtrans.h
+++ b/midtrans.h
@@ -13,9 +13,16 @@ struct midtrans_banktransfer {
 	char *permata;
 };
 
+struct midtrans_echannel {
+	char *bill_info1;
+	char *bill_info2;
+};
+
 #define midtrans_charge(x, y) _Generic((x),\
 		struct midtrans_banktransfer:\
-		midtrans_charge_banktransfer(x, y)\
+		midtrans_charge_banktransfer(x, y),\
+		struct midtrans_echannel:\
+		midtrans_charge_echannel(x, y)\
 		)
 
 #ifdef __cplusplus
@@ -24,11 +31,15 @@ extern "C" {
 
 void midtrans_init(const char *api_key, char *pem);
 struct midtrans_banktransfer midtrans_banktransfer_new(char *bank);
+struct midtrans_echannel midtrans_echannel_new(char *bill_info1,
+		char *bill_info2);
 struct midtrans_transaction midtrans_transaction_new(char *order_id,
 		long gross_amount);
 char *midtrans_charge_banktransfer(struct midtrans_banktransfer banktransfer,
 		struct midtrans_transaction transaction
 		/*, char *custom_fields[]*/);
+char *midtrans_charge_echannel(struct midtrans_echannel echannel,
+		struct midtrans_transaction transaction);
 char *midtrans_status(const char *order_id);
 void midtrans_cleanup();