Fix "Default sharing permissions are ignored"

Fixes: #7412

src/gui/owncloudgui.cpp

@@ -1118,10 +1118,7 @@ void ownCloudGui::slotShowShareDialog(const QString &sharePath, const QString &l
     //
     // The correct value will be found with a propfind from ShareDialog.
     // (we want to show the dialog directly, not wait for the propfind first)
-    SharePermissions maxSharingPermissions =
-        SharePermissionRead
-        | SharePermissionUpdate | SharePermissionCreate | SharePermissionDelete
-        | SharePermissionShare;
+    SharePermissions maxSharingPermissions = static_cast<SharePermissions>(accountState->account()->capabilities().defaultPermissions());
     if (!resharingAllowed) {
         maxSharingPermissions = SharePermission(0);
     }

src/libsync/capabilities.cpp

@@ -17,6 +17,13 @@
 #include <QVariantMap>
 #include <QDebug>
 
+namespace  {
+    QString FileSharingKey()
+    {
+        return QStringLiteral("files_sharing");
+    }
+}
+
 namespace OCC {
 
 
@@ -85,6 +92,11 @@ bool Capabilities::shareResharing() const
     return _capabilities["files_sharing"].toMap()["resharing"].toBool();
 }
 
+int Capabilities::defaultPermissions() const
+{
+    return _capabilities.value(FileSharingKey()).toMap().value("default_permissions", 1).toInt();
+}
+
 bool Capabilities::notificationsAvailable() const
 {
     // We require the OCS style API in 9.x, can't deal with the REST one only found in 8.2

src/libsync/capabilities.h

@@ -43,6 +43,10 @@ public:
     bool sharePublicLinkEnforceExpireDate() const;
     bool sharePublicLinkMultiple() const;
     bool shareResharing() const;
+
+    // TODO: return SharePermission
+    int defaultPermissions() const;
+
     bool chunkingNg() const;
     QString zsyncSupportedVersion() const;