Allow to control availability of folders in the settings dialog

It felt odd to be able to control the encryption status in the settings
dialog but not the availability. Also availability was controllable on
the root, so let's make it widely available.

Signed-off-by: Kevin Ottens <kevin.ottens@nextcloud.com>

src/gui/accountsettings.cpp

@@ -403,6 +403,39 @@ void AccountSettings::slotSubfolderContextMenuRequested(const QModelIndex& index
     ac = menu.addAction(tr("Edit Ignored Files"));
     connect(ac, &QAction::triggered, this, &AccountSettings::slotEditCurrentLocalIgnoredFiles);
 
+    const auto folder = info->_folder;
+    if (folder && folder->virtualFilesEnabled()) {
+        auto availabilityMenu = menu.addMenu(tr("Availability"));
+
+        // Has '/' suffix convention for paths here but VFS and
+        // sync engine expects no such suffix
+        Q_ASSERT(info->_path.endsWith('/'));
+        const auto remotePath = info->_path.chopped(1);
+
+        // It might be an E2EE mangled path, so let's try to demangle it
+        const auto journal = folder->journalDb();
+        SyncJournalFileRecord rec;
+        journal->getFileRecordByE2eMangledName(remotePath, &rec);
+
+        const auto path = rec.isValid() ? rec._path : remotePath;
+
+        auto availability = folder->vfs().availability(path);
+        if (availability) {
+            ac = availabilityMenu->addAction(Utility::vfsCurrentAvailabilityText(*availability));
+            ac->setEnabled(false);
+        }
+
+        ac = availabilityMenu->addAction(Utility::vfsPinActionText());
+        ac->setEnabled(!availability || *availability != VfsItemAvailability::AlwaysLocal);
+        connect(ac, &QAction::triggered, this, [this, folder, path] { slotSetSubFolderAvailability(folder, path, PinState::AlwaysLocal); });
+
+        ac = availabilityMenu->addAction(Utility::vfsFreeSpaceActionText());
+        ac->setEnabled(!availability
+                || !(*availability == VfsItemAvailability::OnlineOnly
+                    || *availability == VfsItemAvailability::AllDehydrated));
+        connect(ac, &QAction::triggered, this, [this, folder, path] { slotSetSubFolderAvailability(folder, path, PinState::OnlineOnly); });
+    }
+
     menu.exec(QCursor::pos());
 }
 
@@ -815,6 +848,19 @@ void AccountSettings::slotSetCurrentFolderAvailability(PinState state)
     folder->scheduleThisFolderSoon();
 }
 
+void AccountSettings::slotSetSubFolderAvailability(Folder *folder, const QString &path, PinState state)
+{
+    Q_ASSERT(folder && folder->virtualFilesEnabled());
+    Q_ASSERT(!path.endsWith('/'));
+
+    // Update the pin state on all items
+    folder->vfs().setPinState(path, state);
+
+    // Trigger sync
+    folder->schedulePathForLocalDiscovery(path);
+    folder->scheduleThisFolderSoon();
+}
+
 void AccountSettings::showConnectionLabel(const QString &message, QStringList errors)
 {
     const QString errStyle = QLatin1String("color:#ffffff; background-color:#bb4d4d;padding:5px;"

src/gui/accountsettings.h

@@ -89,6 +89,7 @@ protected slots:
     void slotEnableVfsCurrentFolder();
     void slotDisableVfsCurrentFolder();
     void slotSetCurrentFolderAvailability(PinState state);
+    void slotSetSubFolderAvailability(Folder *folder, const QString &path, PinState state);
     void slotFolderWizardAccepted();
     void slotFolderWizardRejected();
     void slotDeleteAccount();