added nullables

Author: pknotfound

OGParser/src/main/java/com/kedia/ogparser/OpenGraphParser.kt

@@ -102,7 +102,7 @@ class OpenGraphParser(
             return@withContext null
         }
 
-        if (openGraphResult!!.title.isEmpty() && openGraphResult!!.description.isEmpty() && showNullOnEmpty) {
+        if (openGraphResult!!.title?.isEmpty() == true && openGraphResult!!.description?.isEmpty() == true && showNullOnEmpty) {
             launch(Dispatchers.Main) {
                 listener.onError("Null or empty response from the server")
             }

OGParser/src/main/java/com/kedia/ogparser/OpenGraphResult.kt

@@ -1,10 +1,10 @@
 package com.kedia.ogparser
 
 data class OpenGraphResult(
-    var title: String = "",
-    var description: String = "",
-    var url: String = "",
-    var image: String = "",
-    var siteName: String = "",
-    var type: String = ""
+    var title: String? = null,
+    var description: String? = null,
+    var url: String? = null,
+    var image: String? = null,
+    var siteName: String? = null,
+    var type: String? = null
 )