From 7dde870afb115824e7bfa88f1711b95e1363a559 Mon Sep 17 00:00:00 2001
From: Joshua Ramon Enslin <joshua@museum-digital.de>
Date: Wed, 13 Apr 2022 00:16:05 +0200
Subject: [PATCH] Improve type-safety of wikidata fetcher

---
 src/NodaWikidataFetcher.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/NodaWikidataFetcher.php b/src/NodaWikidataFetcher.php
index 7bdec52..98d9bc7 100644
--- a/src/NodaWikidataFetcher.php
+++ b/src/NodaWikidataFetcher.php
@@ -343,30 +343,34 @@ final class NodaWikidataFetcher {
             $list = $doc->getElementsByTagName("style");
             while ($list->length > 0) {
                 $p = $list->item(0);
+                if ($p === null || $p->parentNode === null) break;
                 $p->parentNode->removeChild($p);
             }
 
             $list = $doc->getElementsByTagName("table");
             while ($list->length > 0) {
                 $p = $list->item(0);
+                if ($p === null || $p->parentNode === null) break;
                 $p->parentNode->removeChild($p);
             }
 
             $list = $doc->getElementsByTagName("div");
             while ($list->length > 1) {
                 $p = $list->item(1);
+                if ($p === null || $p->parentNode === null) break;
                 $p->parentNode->removeChild($p);
             }
 
             $list = $doc->getElementsByTagName("ol");
             while ($list->length > 0) {
                 $p = $list->item(0);
+                if ($p === null || $p->parentNode === null) break;
                 $p->parentNode->removeChild($p);
             }
 
             $firstP = $doc->getElementsByTagName("p")->item(0);
             if (strpos($doc->saveHTML($firstP), 'geohack') !== false) {
-                $firstP->parentNode->removeChild($firstP);
+                if ($firstP !== null && $firstP->parentNode !== null) $firstP->parentNode->removeChild($firstP);
             }
 
             /*