Added check for Duplicate UUIDs (see https://keepass2android.codeplex.com/workitem/46)

src/Kp2aBusinessLogic/UiStringKey.cs

@@ -54,6 +54,7 @@ namespace keepass2android
 		ClickOkToSelectLocation,
 		FileIsReadOnly,
 		FileIsReadOnlyOnKitkat,
-		CopyFileRequiredForEditing
+		CopyFileRequiredForEditing,
+		DuplicateUuidsError
     }
 }

src/Kp2aBusinessLogic/database/Database.cs

@@ -181,10 +181,20 @@ namespace keepass2android
 			var childGroups = currentGroup.Groups;
 			var childEntries = currentGroup.Entries;
 
-			foreach (PwEntry e in childEntries) {
+			foreach (PwEntry e in childEntries) 
+			{
+				if (Entries.ContainsKey(e.Uuid))
+				{
+					throw new DuplicateUuidsException();
+				}
 				Entries [e.Uuid] = e;
 			}
-			foreach (PwGroup g in childGroups) {
+			foreach (PwGroup g in childGroups) 
+			{
+				if (Groups.ContainsKey(g.Uuid))
+				{
+					throw new DuplicateUuidsException();
+				}
 				Groups[g.Uuid] = g;
 				PopulateGlobals(g);
 			}
@@ -215,6 +225,8 @@ namespace keepass2android
 		
 	}
 
-
+	internal class DuplicateUuidsException : Exception
+	{
+	}
 }
 

src/Kp2aBusinessLogic/database/edit/LoadDB.cs

@@ -54,7 +54,7 @@ namespace keepass2android
 				StatusLogger.UpdateMessage(UiStringKey.loading_database);
 				//get the stream data into a single stream variable (databaseStream) regardless whether its preloaded or not:
 				MemoryStream preloadedMemoryStream = _databaseData == null ? null : _databaseData.Result;
-				MemoryStream databaseStream; 
+				MemoryStream databaseStream;
 				if (preloadedMemoryStream != null)
 					databaseStream = preloadedMemoryStream;
 				else
@@ -83,12 +83,18 @@ namespace keepass2android
 				foreach (var innerException in e.InnerExceptions)
 				{
 					message = innerException.Message;
-						// Override the message shown with the last (hopefully most recent) inner exception
+					// Override the message shown with the last (hopefully most recent) inner exception
 					Kp2aLog.Log("Exception: " + innerException);
 				}
 				Finish(false, _app.GetResourceString(UiStringKey.ErrorOcurred) + " " + message);
 				return;
 			}
+			catch (DuplicateUuidsException e)
+			{
+				Kp2aLog.Log("Exception: " + e);
+				Finish(false, _app.GetResourceString(UiStringKey.DuplicateUuidsError));
+				return;
+			}
 			catch (Exception e)
 			{
 				Kp2aLog.Log("Exception: " + e);