Allow images to be added via the web

This adds a new divelist context menu entry which asks for a URL. The file
is retrieved and if it is an image it is added to the cache and the url
is associated to dives as with local files.

NB this currently only works with URLs pointing directly to images. But it
should not be too hard to add the possibility to add a direction via an html
file and its image tags.

To test: open dives/test43.xml and delete the image and then add the URL
http://euve10195.vserver.de/~robert/wreck.jpg

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 65 insertions, 2 deletions

diff --git a/qt-ui/divelistview.cpp b/qt-ui/divelistview.cpp
index 92ae60b5d..fda170c56 100644
--- a/qt-ui/divelistview.cpp
+++ b/qt-ui/divelistview.cpp
@@ -4,17 +4,21 @@
  * classes for the divelist of Subsurface
  *
  */
-#include "divelistview.h"
 #include "filtermodels.h"
 #include "modeldelegates.h"
 #include "mainwindow.h"
 #include "divepicturewidget.h"
 #include "display.h"
+#include <unistd.h>
 #include <QSettings>
 #include <QKeyEvent>
 #include <QFileDialog>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QStandardPaths>
 #include "qthelper.h"
 #include "undocommands.h"
+#include "divelistview.h"
 
 //                                #  Date  Rtg Dpth  Dur  Tmp Wght Suit  Cyl  Gas  SAC  OTU  CNS  Loc
 static int defaultWidth[] =    {  70, 140, 90,  50,  50,  50,  50,  70,  50,  50,  70,  50,  50, 500};
@@ -834,6 +838,7 @@ void DiveListView::contextMenuEvent(QContextMenuEvent *event)
 		popup.addAction(tr("Renumber dive(s)"), this, SLOT(renumberDives()));
 		popup.addAction(tr("Shift times"), this, SLOT(shiftTimes()));
 		popup.addAction(tr("Load images"), this, SLOT(loadImages()));
+		popup.addAction(tr("Load image(s) from web"), this, SLOT(loadWebImages()));
 	}
 
 	// "collapse all" really closes all trips,
@@ -859,8 +864,12 @@ void DiveListView::loadImages()
 	QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("Open image files"), lastUsedImageDir(), tr("Image files (*.jpg *.jpeg *.pnm *.tif *.tiff)"));
 	if (fileNames.isEmpty())
 		return;
-
 	updateLastUsedImageDir(QFileInfo(fileNames[0]).dir().path());
+	matchImagesToDives(fileNames);
+}
+
+void DiveListView::matchImagesToDives(QStringList fileNames)
+{
 	ShiftImageTimesDialog shiftDialog(this, fileNames);
 	shiftDialog.setOffset(lastImageTimeOffset());
 	if (!shiftDialog.exec())
@@ -882,6 +891,60 @@ void DiveListView::loadImages()
 	DivePictureModel::instance()->updateDivePictures();
 }
 
+void DiveListView::loadWebImages()
+{
+	URLDialog urlDialog(this);
+	if (!urlDialog.exec())
+		return;
+	loadImageFromURL(QUrl::fromUserInput(urlDialog.url()));
+
+}
+
+void DiveListView::loadImageFromURL(QUrl url)
+{
+	if (url.isValid()) {
+		QEventLoop loop;
+		QNetworkRequest request(url);
+		QNetworkReply *reply = manager.get(request);
+		while (reply->isRunning()) {
+			loop.processEvents();
+			sleep(1);
+		}
+		QByteArray imageData = reply->readAll();
+
+		QImage image = QImage();
+		image.loadFromData(imageData);
+		if (image.isNull())
+			// If this is not an image, maybe it's an html file and Miika can provide some xslr magic to extract images.
+			// In this case we would call the function recursively on the list of image source urls;
+			return;
+
+		// Since we already downloaded the image we can cache it as well.
+		QCryptographicHash hash(QCryptographicHash::Sha1);
+		hash.addData(imageData);
+		QString path = QStandardPaths::standardLocations(QStandardPaths::CacheLocation).first();
+		QDir dir(path);
+		if (!dir.exists())
+			dir.mkpath(path);
+		QFile imageFile(path.append("/").append(hash.result().toHex()));
+		if (imageFile.open(QIODevice::WriteOnly)) {
+			QDataStream stream(&imageFile);
+			stream.writeRawData(imageData.data(), imageData.length());
+			imageFile.waitForBytesWritten(-1);
+			imageFile.close();
+			add_hash(imageFile.fileName(), hash.result());
+			struct picture picture;
+			picture.hash = NULL;
+			picture.filename = strdup(url.toString().toUtf8().data());
+			learnHash(&picture, hash.result());
+			matchImagesToDives(QStringList(url.toString()));
+		}
+	}
+
+
+}
+
+
 QString DiveListView::lastUsedImageDir()
 {
 	QSettings settings;