first implementation finished

app/lib/utils/uri_parser.dart

@@ -0,0 +1,12 @@
+Uri? tryParseUrl(String? input) {
+  if (input != null) {
+    final uri = Uri.tryParse(input);
+    if (uri != null &&
+        uri.hasAuthority &&
+        (uri.isScheme('http') || uri.isScheme('https') || !uri.hasScheme)) {
+      return uri;
+    }
+  }
+
+  return null;
+}