when local sync folder is overriden, respect this choice

may lead to inadvertant data loss, not sure if that could be an issue

Signed-off-by: Matthieu Gallien <matthieu.gallien@nextcloud.com>

src/gui/folderman.cpp

@@ -1751,7 +1751,7 @@ QPair<FolderMan::PathValidityResult, QString> FolderMan::checkPathValidityForNew
     return result;
 }
 
-QString FolderMan::findGoodPathForNewSyncFolder(const QString &basePath, const QUrl &serverUrl) const
+QString FolderMan::findGoodPathForNewSyncFolder(const QString &basePath, const QUrl &serverUrl, GoodPathStrategy allowExisting) const
 {
     QString folder = basePath;
 
@@ -1768,9 +1768,8 @@ QString FolderMan::findGoodPathForNewSyncFolder(const QString &basePath, const Q
 
     int attempt = 1;
     forever {
-        const bool isGood =
-            !QFileInfo(folder).exists()
-            && FolderMan::instance()->checkPathValidityForNewFolder(folder, serverUrl).second.isEmpty();
+        const auto isGood = FolderMan::instance()->checkPathValidityForNewFolder(folder, serverUrl).second.isEmpty() &&
+            (allowExisting == GoodPathStrategy::AllowOverrideExistingPath || !QFileInfo::exists(folder));
         if (isGood) {
             break;
         }

src/gui/folderman.h

@@ -74,6 +74,11 @@ public:
         ErrorNonEmptyFolder
     };
 
+    enum class GoodPathStrategy {
+        AllowOnlyNewPath,
+        AllowOverrideExistingPath,
+    };
+
     ~FolderMan() override;
     static FolderMan *instance();
 
@@ -158,7 +163,7 @@ public:
      * subfolder of ~ would be a good candidate. When that happens \a basePath
      * is returned.
      */
-    [[nodiscard]] QString findGoodPathForNewSyncFolder(const QString &basePath, const QUrl &serverUrl) const;
+    [[nodiscard]] QString findGoodPathForNewSyncFolder(const QString &basePath, const QUrl &serverUrl, GoodPathStrategy allowExisting) const;
 
     /**
      * While ignoring hidden files can theoretically be switched per folder,

src/gui/folderwizard.cpp

@@ -71,7 +71,7 @@ FolderWizardLocalPath::FolderWizardLocalPath(const AccountPtr &account)
     QUrl serverUrl = _account->url();
     serverUrl.setUserName(_account->credentials()->user());
     QString defaultPath = QDir::homePath() + QLatin1Char('/') + Theme::instance()->appName();
-    defaultPath = FolderMan::instance()->findGoodPathForNewSyncFolder(defaultPath, serverUrl);
+    defaultPath = FolderMan::instance()->findGoodPathForNewSyncFolder(defaultPath, serverUrl, FolderMan::GoodPathStrategy::AllowOnlyNewPath);
     _ui.localFolderLineEdit->setText(QDir::toNativeSeparators(defaultPath));
     _ui.localFolderLineEdit->setToolTip(tr("Enter the path to the local folder."));
 

src/gui/wizard/owncloudadvancedsetuppage.cpp

@@ -155,7 +155,14 @@ void OwncloudAdvancedSetupPage::initializePage()
     _ui.lSyncEverythingSizeLabel->clear();
 
     // Update the local folder - this is not guaranteed to find a good one
-    QString goodLocalFolder = FolderMan::instance()->findGoodPathForNewSyncFolder(localFolder(), serverUrl());
+    ConfigFile cfg;
+    const auto overrideLocalDir = !cfg.overrideLocalDir().isEmpty();
+
+    auto goodLocalFolder = FolderMan::instance()->findGoodPathForNewSyncFolder(localFolder(), serverUrl(), FolderMan::GoodPathStrategy::AllowOnlyNewPath);
+    if (overrideLocalDir) {
+        ConfigFile cfg;
+        goodLocalFolder = FolderMan::instance()->findGoodPathForNewSyncFolder(cfg.overrideLocalDir(), serverUrl(), FolderMan::GoodPathStrategy::AllowOverrideExistingPath);
+    }
     wizard()->setProperty("localFolder", goodLocalFolder);
 
     // call to init label

test/testfolderman.cpp

@@ -404,25 +404,25 @@ private slots:
 
         // TEST
 
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/oc", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/oc", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/oc"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/ownCloud3"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/ownCloud22"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2/foo", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2/foo", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/ownCloud2/foo"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2/bar", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2/bar", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/ownCloud2/bar"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/sub", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/sub", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
                  QString(dirPath + "/sub2"));
 
         // REMOVE ownCloud2 from the filesystem, but keep a folder sync'ed to it.
         // We should still not suggest this folder as a new folder.
         QDir(dirPath + "/ownCloud2/").removeRecursively();
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
             QString(dirPath + "/ownCloud3"));
-        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2", url),
+        QCOMPARE(folderman->findGoodPathForNewSyncFolder(dirPath + "/ownCloud2", url, FolderMan::GoodPathStrategy::AllowOnlyNewPath),
             QString(dirPath + "/ownCloud22"));
     }
 };