1 files changed, 19 insertions, 0 deletions
diff --git a/src/callnotifier/Logger/CallBase.php b/src/callnotifier/Logger/CallBase.php
new file mode 100644
index 0000000..8bd143c
--- /dev/null
+++ b/src/callnotifier/Logger/CallBase.php
@@ -0,0 +1,19 @@
+<?php
+namespace callnotifier;
+
+abstract class Logger_CallBase implements Logger
+{
+    protected function addUnsetVars($call)
+    {
+        static $expectedVars = array(
+            'toName', 'fromName', 'toLocation', 'fromLocation'
+        );
+        foreach ($expectedVars as $varName) {
+            if (!isset($call->$varName)) {
+                $call->$varName = null;
+            }
+        }
+    }
+}
+
+?>