From 5dfc6c0c97686ff01539fdf9548678fa507c5167 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?=
 =?UTF-8?q?=EA=A6=BF=EA=A6=A7=EA=A6=AE=EA=A6=91=EA=A6=A9=EA=A6=AD=EA=A7=80?=
 <erik@darapsa.co.id>
Date: Thu, 10 Jun 2021 18:34:21 +0800
Subject: Anticipate asynchronous data fetch

---
 client.cxx           | 21 +++++++++++++++++----
 qicclient/client.hxx |  2 ++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/client.cxx b/client.cxx
index ff28eaa..6e4a3f4 100644
--- a/client.cxx
+++ b/client.cxx
@@ -2,6 +2,7 @@
 #include <memory>
 #include <QObject>
 #include <icclient/typedefs.h>
+#include <icclient/catalog.h>
 #include <icclient/client.h>
 #include "qicclient/catalog.hxx"
 #ifndef __EMSCRIPTEN__
@@ -9,10 +10,19 @@
 #endif
 #include "qicclient/client.hxx"
 
+static QICClient::Client *client;
+
+static void callback(icclient_catalog* catalog)
+{
+	client->emitCatalog(catalog);
+	icclient_catalog_free(catalog);
+}
+
 namespace QICClient {
 
 	Client::Client(char const* url, char const* certificate)
 	{
+		client = this;
 		icclient_init(url, certificate);
 	}
 
@@ -24,15 +34,18 @@ namespace QICClient {
 	void Client::results(QString const& prodGroup, icclient_handler handler)
 	{
 		icclient_catalog* catalog = nullptr;
-		icclient_results(prodGroup.toLatin1().constData(), handler, &catalog);
-		if (catalog) emit gotResults(new Catalog{catalog});
+		icclient_results(prodGroup.toLatin1().constData(), callback, &catalog, handler);
 	}
 
 	void Client::allProducts(icclient_handler handler)
 	{
 		icclient_catalog* catalog = nullptr;
-		icclient_allproducts(handler, &catalog);
-		if (catalog) emit gotResults(new Catalog{catalog});
+		icclient_allproducts(callback, &catalog, handler);
+	}
+
+	void Client::emitCatalog(icclient_catalog* catalog)
+	{
+		emit gotResults(new Catalog{catalog});
 	}
 
 	void Client::flyPage(QString const& sku,icclient_handler handler)
diff --git a/qicclient/client.hxx b/qicclient/client.hxx
index dfe1888..d508b16 100644
--- a/qicclient/client.hxx
+++ b/qicclient/client.hxx
@@ -38,6 +38,8 @@ namespace QICClient {
 			 */
 			void allProducts(icclient_handler handler);
 
+			void emitCatalog(icclient_catalog *catalog);
+
 			/*!
 			 * \brief For fetching data about a specific product.
 			 * \param sku The SKU of the item to order.
-- 
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