Support canceling file transfer from pseudo job

Allows to click cancel on the job popup rather than only from
within NeoChat.

src/filetransferpseudojob.cpp

@@ -12,6 +12,7 @@ FileTransferPseudoJob::FileTransferPseudoJob(Operation operation, const QString
     , m_eventId(eventId)
     , m_operation(operation)
 {
+    setCapabilities(KJob::Killable);
 }
 
 void FileTransferPseudoJob::fileTransferProgress(const QString &id, qint64 progress, qint64 total)
@@ -58,3 +59,9 @@ void FileTransferPseudoJob::start()
                        {i18nc("The URL being downloaded/uploaded", "Source"), m_path},
                        {i18nc("The location being downloaded to", "Destination"), m_path});
 }
+
+bool FileTransferPseudoJob::doKill()
+{
+    Q_EMIT cancelRequested(m_eventId);
+    return true;
+}

src/filetransferpseudojob.h

@@ -15,6 +15,7 @@
  */
 class FileTransferPseudoJob : public KJob
 {
+    Q_OBJECT
 public:
     enum Operation {
         Download,
@@ -48,6 +49,12 @@ public:
      */
     void start() override;
 
+protected:
+    bool doKill() override;
+
+Q_SIGNALS:
+    void cancelRequested(const QString &id);
+
 private:
     QString m_path;
     QString m_eventId;

src/neochatroom.cpp

@@ -264,6 +264,7 @@ QCoro::Task<void> NeoChatRoom::doUploadFile(QUrl url, QString body)
             job->fileTransferFailed(txnId);
         }
     });
+    connect(job, &FileTransferPseudoJob::cancelRequested, this, &Room::cancelFileTransfer);
     KIO::getJobTracker()->registerJob(job);
     job->start();
 #endif
@@ -1526,6 +1527,7 @@ void NeoChatRoom::download(const QString &eventId, const QUrl &localFilename)
             job->fileTransferFailed(eventId);
         }
     });
+    connect(job, &FileTransferPseudoJob::cancelRequested, this, &Room::cancelFileTransfer);
     KIO::getJobTracker()->registerJob(job);
     job->start();
 #endif