From bade08910bd47e550d3b1ba7ca2a4bc4bba5806e Mon Sep 17 00:00:00 2001
From: "Robert C. Helling" <helling@atdotde.de>
Date: Sun, 1 May 2016 00:00:29 +0200
Subject: [PATCH] Only attempt to download each picture once
To: subsurface@subsurface-divelog.org

Otherwise we keep downloading the same image multiple times instead
of new images.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
---
 core/imagedownloader.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/core/imagedownloader.cpp b/core/imagedownloader.cpp
index dc74a1e..d4dd859 100644
--- a/core/imagedownloader.cpp
+++ b/core/imagedownloader.cpp
@@ -4,6 +4,7 @@
 #include "qthelper.h"
 #include "imagedownloader.h"
 #include <unistd.h>
+#include <QString>
 
 #include <QtConcurrent>
 
@@ -75,10 +76,17 @@ void ImageDownloader::saveImage(QNetworkReply *reply)
 
 }
 
+QSet<QString> queuedPictures;
+QMutex pictureQueueMutex;
+
 void loadPicture(struct picture *picture, bool fromHash)
 {
 	if (!picture)
 		return;
+	QMutexLocker locker(&pictureQueueMutex);
+	if (queuedPictures.contains(QString(picture->filename)))
+		return;
+	queuedPictures.insert(QString(picture->filename));
 	ImageDownloader download(picture);
 	download.load(fromHash);
 }
-- 
2.6.4 (Apple Git-63)