remove journal when adding a new sync on an existing folder

src/mirall/application.cpp

@@ -698,6 +698,8 @@ void Application::slotAddFolder()
     _folderMan->setSyncEnabled(true); // do start sync again.
 
     if( goodData ) {
+        if (!FolderMan::ensureJournalGone( sourceFolder ))
+            return;
         _folderMan->addFolderDefinition( backend, alias, sourceFolder, targetPath, onlyThisLAN );
         Folder *f = _folderMan->setupFolderFromConfigFile( alias );
         if( f ) {

src/mirall/folderman.cpp

@@ -27,6 +27,7 @@
 #endif
 
 #include <QDesktopServices>
+#include <QMessageBox>
 #include <QtCore>
 
 namespace Mirall {
@@ -125,6 +126,24 @@ void FolderMan::wipeAllJournals()
     }
 }
 
+bool FolderMan::ensureJournalGone(const QString &localPath)
+{
+
+    // remove old .csync_journal file
+    QString stateDbFile = localPath+QLatin1String(".csync_journal.db");
+    while (!QFile::remove(stateDbFile)) {
+        int ret = QMessageBox::warning(0, tr("Could not reset folder state"),
+                                       tr("An old sync journal '%1' was found, "
+                                          "but could not be removed. Please make sure "
+                                          "that no application is currently using it.")
+                                       .arg(QDir::fromNativeSeparators(stateDbFile)),
+                                       QMessageBox::Retry|QMessageBox::Abort);
+        if (ret == QMessageBox::Abort) {
+            return 0;
+        }
+    }
+}
+
 void FolderMan::terminateCurrentSync()
 {
     if( !_currentSyncFolder.isEmpty() ) {
@@ -243,7 +262,7 @@ Folder* FolderMan::setupFolderFromConfigFile(const QString &file) {
             folder->setConfigFile(file);
         } else {
             qWarning() << "unknown backend" << backend;
-            return NULL;
+            return 0;
         }
     }
 

src/mirall/folderman.h

@@ -76,6 +76,13 @@ public:
      */
     void wipeAllJournals();
 
+    /**
+     * Ensures that a given directory does not contain a .csync_journal.
+     *
+     * @returns false if the journal could not be removed, false otherwise.
+     */
+    static bool ensureJournalGone(const QString &path);
+
     /**
      * Creates a new and empty local directory.
      */