From 865deaf4017c11ac3061704172f1b7d235003e31 Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Tue, 30 Apr 2019 09:50:24 -0400
Subject: [PATCH] null converters

---
 src/App/Utilities/IsNotNullConverter.cs | 24 ++++++++++++++++++++++++
 src/App/Utilities/IsNullConverter.cs    | 24 ++++++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 src/App/Utilities/IsNotNullConverter.cs
 create mode 100644 src/App/Utilities/IsNullConverter.cs

diff --git a/src/App/Utilities/IsNotNullConverter.cs b/src/App/Utilities/IsNotNullConverter.cs
new file mode 100644
index 000000000..d692e813c
--- /dev/null
+++ b/src/App/Utilities/IsNotNullConverter.cs
@@ -0,0 +1,24 @@
+using System;
+using Xamarin.Forms;
+
+namespace Bit.App.Utilities
+{
+    public class IsNotNullConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter,
+            System.Globalization.CultureInfo culture)
+        {
+            if(targetType == typeof(bool))
+            {
+                return value != null;
+            }
+            throw new InvalidOperationException("The target must be a boolean.");
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter,
+            System.Globalization.CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+    }
+}
diff --git a/src/App/Utilities/IsNullConverter.cs b/src/App/Utilities/IsNullConverter.cs
new file mode 100644
index 000000000..99ac14d1c
--- /dev/null
+++ b/src/App/Utilities/IsNullConverter.cs
@@ -0,0 +1,24 @@
+using System;
+using Xamarin.Forms;
+
+namespace Bit.App.Utilities
+{
+    public class IsNullConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter,
+            System.Globalization.CultureInfo culture)
+        {
+            if(targetType == typeof(bool))
+            {
+                return value == null;
+            }
+            throw new InvalidOperationException("The target must be a boolean.");
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter,
+            System.Globalization.CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+    }
+}