From f31cf101872420a14995f2b24d21377a65adc9dd Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Fri, 23 Mar 2018 12:00:13 +0900
Subject: Room::downloadFile(): don't start another job if the transfer is
 ongoing

---
 room.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/room.cpp b/room.cpp
index 6be00721..3ea6c323 100644
--- a/room.cpp
+++ b/room.cpp
@@ -1094,6 +1094,15 @@ void Room::uploadFile(const QString& id, const QUrl& localFilename,
 
 void Room::downloadFile(const QString& eventId, const QUrl& localFilename)
 {
+    auto ongoingTransfer = d->fileTransfers.find(eventId);
+    if (ongoingTransfer != d->fileTransfers.end() &&
+            ongoingTransfer->status == FileTransferInfo::Started)
+    {
+        qCWarning(MAIN) << "Download for" << eventId
+                        << "already started; to restart, cancel it first";
+        return;
+    }
+
     Q_ASSERT_X(localFilename.isEmpty() || localFilename.isLocalFile(),
                __FUNCTION__, "localFilename should point at a local file");
     auto* event = d->getEventWithFile(eventId);
-- 
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