Create `ChangeMonitor` property delegate helper

1 files changed, 18 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt
new file mode 100644
index 0000000000..398177db99
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/util/ChangeMonitor.kt
@@ -0,0 +1,18 @@
+package net.mullvad.mullvadvpn.util
+
+import kotlin.properties.Delegates.observable
+
+class ChangeMonitor {
+    var changed = false
+        private set
+
+    fun <T> monitor(initialValue: T) = observable(initialValue) { _, oldValue, newValue ->
+        if (oldValue != newValue) {
+            changed = true
+        }
+    }
+
+    fun reset() {
+        changed = false
+    }
+}