Propagate download: Fix restoring files for which the conflict file exists

For issue #3106

1) Always use the actual timestamp from the file in the file system
to create the conflict file.  This is important because if one edit a
file several time, they should have different name. Also it makes more
sens to have the mtime of the modified file.

2) Give the correct size to the job so we know when the temporary file
is complete in case of resuming.

2 files changed, 3 insertions, 2 deletions

diff --git a/src/libsync/propagator_legacy.cpp b/src/libsync/propagator_legacy.cpp
index dc714b607..b9dc7e8cd 100644
--- a/src/libsync/propagator_legacy.cpp
+++ b/src/libsync/propagator_legacy.cpp
@@ -695,7 +695,8 @@ void PropagateDownloadFileLegacy::start()
         && !FileSystem::fileEquals(fn, tmpFile.fileName()); // compare the files to see if there was an actual conflict.
     //In case of conflict, make a backup of the old file
     if (isConflict) {
-        QString conflictFileName = makeConflictFileName(fn, Utility::qDateTimeFromTime_t(_item._modtime));
+        auto conflictDate = FileSystem::fileExists(fn) ? FileSystem::getModTime(fn) : _item._modtime;
+        QString conflictFileName = makeConflictFileName(fn, Utility::qDateTimeFromTime_t(conflictDate));
         QString renameError;
         if (!FileSystem::rename(fn, conflictFileName, &renameError)) {
             //If the rename fails, don't replace it.
diff --git a/src/libsync/syncengine.cpp b/src/libsync/syncengine.cpp
index d8fa74a89..81d087297 100644
--- a/src/libsync/syncengine.cpp
+++ b/src/libsync/syncengine.cpp
@@ -999,8 +999,8 @@ void SyncEngine::checkForPermission()
                     it->_direction = SyncFileItem::Down;
                     it->_isRestoration = true;
                     // take the things to write to the db from the "other" node (i.e: info from server)
-                    // ^^ FIXME This might not be needed anymore since we merge the info in treewalkFile
                     it->_modtime = it->log._other_modtime;
+                    it->_size = it->log._other_size;
                     it->_fileId = it->log._other_fileId;
                     it->_etag = it->log._other_etag;
                     it->_errorString = tr("Not allowed to upload this file because it is read-only on the server, restoring");