Delete realm files if unsupportedFileFormatVersion exception occurs

godtools/App/Share/Data/RealmDatabase/RealmDatabase.swift

@@ -8,6 +8,7 @@
 
 import Foundation
 import RealmSwift
+import Realm
 import Combine
 
 class RealmDatabase {
@@ -20,8 +21,38 @@ class RealmDatabase {
 
         self.databaseConfiguration = databaseConfiguration
         config = databaseConfiguration.getRealmConfig()
+
+        _ = checkForUnsupportedFileFormatVersionAndDeleteRealmFilesIfNeeded(config: config)
     }
-
+
+    private func checkForUnsupportedFileFormatVersionAndDeleteRealmFilesIfNeeded(config: Realm.Configuration) -> Error? {
+
+        do {
+
+            _ = try Realm(configuration: config)
+
+        }
+        catch let realmConfigError as NSError {
+
+            if realmConfigError.code == Realm.Error.unsupportedFileFormatVersion.rawValue {
+
+                do {
+                    _ = try Realm.deleteFiles(for: config)
+                }
+                catch let deleteFilesError {
+
+                    return deleteFilesError
+                }
+            }
+            else {
+
+                return realmConfigError
+            }
+        }
+
+        return nil
+    }
+
     func openRealm() -> Realm {
         return try! Realm(configuration: config)
     }