From 8f002c08c6fb6938b9ebf8f037465e5061571bc2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=A6=8C=EA=A6=AB=EA=A6=B6=EA=A6=8F=EA=A7=80=EA=A6=A6?=
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 <erik@darapsa.co.id>
Date: Thu, 6 Oct 2022 20:00:58 +0800
Subject: Charge Transaction draft

---
 midtrans.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 midtrans.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)

diff --git a/midtrans.c b/midtrans.c
index e8472a9..9d171a0 100644
--- a/midtrans.c
+++ b/midtrans.c
@@ -105,6 +105,56 @@ void midtrans_status(const char *order_id)
 	pthread_create(&threads[num_threads - 1], NULL, request, NULL);
 }
 
+void midtrans_charge(enum midtrans_payment type, void *object,
+		struct midtrans_transaction *transaction,
+		char *custom_fields[])
+{
+	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);
+
+	size_t payment_len = 0;
+	char *payment = NULL;
+	switch (type) {
+		case MIDTRANS_BANKTRANSFER:
+		default:
+			;
+			char *payment_tmpl = "bank_transfer\","
+				"\t\"bank_transfer\": {"
+				"\t\t\"bank\": \"%s\"";
+			struct midtrans_banktransfer *banktransfer
+				= object;
+			payment_len = strlen(payment_tmpl) - strlen("%s")
+				+ strlen(banktransfer->bank);
+			payment = malloc(payment_len + 1);
+			sprintf(payment, payment_tmpl, banktransfer->bank);
+			break;
+	}
+	static const char *post_tmpl =
+		"{\n"
+		"\t\"payment_type\": \"%s"
+		"\t},"
+		"\t\"transaction_details\": {"
+		"\t\t\"order_id\": \"%s\","
+		"\t\t\"gross_amount\": %ld"
+		"}";
+	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") * 2 - 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);
+
+	threads = realloc(threads, ++num_threads * sizeof(pthread_t));
+	pthread_create(&threads[num_threads - 1], NULL, request, NULL);
+}
+
 void midtrans_cleanup()
 {
 	for (size_t i = 0; i < num_threads; i++)
diff --git a/midtrans.h b/midtrans.h
index 9afce42..3bb8174 100644
--- a/midtrans.h
+++ b/midtrans.h
@@ -1,12 +1,44 @@
 #ifndef MIDTRANS_H
 #define MIDTRANS_H
 
+struct midtrans_transaction {
+	char *order_id;
+	long gross_amount;
+};
+
+enum midtrans_payment {
+	MIDTRANS_CREDITCARD,
+	MIDTRANS_BANKTRANSFER,
+	MIDTRANS_BCA_KLIKBCA,
+	MIDTRANS_BCA_KLIKPAY,
+	MIDTRANS_BRI_EPAY,
+	MIDTRANS_CIMB_CLICKS,
+	MIDTRANS_DANAMON_ONLINE,
+	MIDTRANS_UOB_EZPAY,
+	MIDTRANS_QRIS,
+	MIDTRANS_GOPAY,
+	MIDTRANS_SHOPEEPAY,
+	MIDTRANS_CSTORE,
+	MIDTRANS_AKULAKU,
+	MIDTRANS_KREDIVO
+};
+
+struct midtrans_banktransfer {
+	char *bank;
+	char *va_number;
+	char *bca;
+	char *permata;
+};
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 void midtrans_init(const char *api_key, const char *cainfo);
 void midtrans_status(const char *order_id);
+void midtrans_charge(enum midtrans_payment payment, void *object,
+		struct midtrans_transaction *transaction,
+		char *custom_fields[]);
 void midtrans_cleanup();
 
 #ifdef __cplusplus
-- 
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