Handle transfer job being canceled

Set KilledJobError to indicate it was canceled by the user
to avoid a bogus "finished" notification.

Sadly, fileTransferCanceled has been removed from libQuotient
so this lambda botch checking transfer status needs to be done.

src/filetransferpseudojob.cpp

@@ -41,6 +41,15 @@ void FileTransferPseudoJob::fileTransferFailed(const QString &id, const QString
     emitResult();
 }
 
+void FileTransferPseudoJob::fileTransferCanceled(const QString &id)
+{
+    if (id != m_eventId) {
+        return;
+    }
+    setError(KJob::KilledJobError);
+    emitResult();
+}
+
 void FileTransferPseudoJob::start()
 {
     setTotalAmount(Unit::Files, 1);

src/filetransferpseudojob.h

@@ -38,6 +38,11 @@ public:
      */
     void fileTransferFailed(const QString &id, const QString &errorMessage = {});
 
+    /**
+     * @brief Set the file transfer as canceled.
+     */
+    void fileTransferCanceled(const QString &id);
+
     /**
      * @brief Start the file transfer.
      */

src/neochatroom.cpp

@@ -256,7 +256,14 @@ QCoro::Task<void> NeoChatRoom::doUploadFile(QUrl url, QString body)
     auto job = new FileTransferPseudoJob(FileTransferPseudoJob::Upload, url.toLocalFile(), txnId);
     connect(this, &Room::fileTransferProgress, job, &FileTransferPseudoJob::fileTransferProgress);
     connect(this, &Room::fileTransferCompleted, job, &FileTransferPseudoJob::fileTransferCompleted);
-    connect(this, &Room::fileTransferFailed, job, &FileTransferPseudoJob::fileTransferFailed);
+    connect(this, &Room::fileTransferFailed, job, [this, job, txnId] {
+        auto info = fileTransferInfo(txnId);
+        if (info.status == FileTransferInfo::Cancelled) {
+            job->fileTransferCanceled(txnId);
+        } else {
+            job->fileTransferFailed(txnId);
+        }
+    });
     KIO::getJobTracker()->registerJob(job);
     job->start();
 #endif
@@ -1511,7 +1518,14 @@ void NeoChatRoom::download(const QString &eventId, const QUrl &localFilename)
     auto job = new FileTransferPseudoJob(FileTransferPseudoJob::Download, localFilename.toLocalFile(), eventId);
     connect(this, &Room::fileTransferProgress, job, &FileTransferPseudoJob::fileTransferProgress);
     connect(this, &Room::fileTransferCompleted, job, &FileTransferPseudoJob::fileTransferCompleted);
-    connect(this, &Room::fileTransferFailed, job, &FileTransferPseudoJob::fileTransferFailed);
+    connect(this, &Room::fileTransferFailed, job, [this, job, eventId] {
+        auto info = fileTransferInfo(eventId);
+        if (info.status == FileTransferInfo::Cancelled) {
+            job->fileTransferCanceled(eventId);
+        } else {
+            job->fileTransferFailed(eventId);
+        }
+    });
     KIO::getJobTracker()->registerJob(job);
     job->start();
 #endif