From 7b999cef50edb79129c98531e79cf64d32536511 Mon Sep 17 00:00:00 2001
From: Eric Espie <eric.espie@combodo.com>
Date: Tue, 26 Mar 2024 09:52:20 +0100
Subject: [PATCH] Compilation issue

---
 core/designdocument.class.inc.php | 53 +++++++++++++++++++++++++++++--
 setup/modelfactory.class.inc.php  | 12 +++----
 2 files changed, 56 insertions(+), 9 deletions(-)

diff --git a/core/designdocument.class.inc.php b/core/designdocument.class.inc.php
index 6137f7fd1..b36bd10d1 100644
--- a/core/designdocument.class.inc.php
+++ b/core/designdocument.class.inc.php
@@ -26,7 +26,6 @@
 
 namespace Combodo\iTop;
 
-use DOMComment;
 use DOMDocument;
 use DOMFormatException;
 use DOMNode;
@@ -35,9 +34,7 @@ use DOMXPath;
 use Exception;
 use IssueLog;
 use LogAPI;
-use MFDocument;
 use MFElement;
-use ModelFactory;
 use utils;
 
 /**
@@ -242,6 +239,56 @@ class DesignElement extends \DOMElement
 
 		return '';
 	}
+
+	/**
+	 * Compatibility with PHP8.0
+	 *
+	 * @return \DOMElement|null
+	 *
+	 * @since 3.1.2
+	 */
+	public function GetFirstElementChild()
+	{
+		if (property_exists($this, 'firstElementChild')) {
+			return $this->firstElementChild;
+		}
+
+		$oChildNode = $this->firstChild;
+		while (!is_null($oChildNode)) {
+			if ($oChildNode instanceof \DOMElement) {
+				return $oChildNode;
+			}
+			$oChildNode = $oChildNode->nextSibling;
+		}
+
+		return null;
+	}
+
+	/**
+	 * Compatibility with PHP8.0
+	 *
+	 * @return \DOMElement|null
+	 *
+	 * @since 3.1.2
+	 */
+	public function GetNextElementSibling()
+	{
+		if (property_exists($this, 'nextElementSibling')) {
+			return $this->nextElementSibling;
+		}
+
+		$oSibling = $this->nextSibling;
+		while (!is_null($oSibling)) {
+			if ($oSibling instanceof \DOMElement) {
+				return $oSibling;
+			}
+			$oSibling = $oSibling->nextSibling;
+		}
+
+		return null;
+
+	}
+
 	/**
 	 * Returns the node directly under the given node
 	 * @param $sTagName
diff --git a/setup/modelfactory.class.inc.php b/setup/modelfactory.class.inc.php
index 945f3c703..4009a5afe 100644
--- a/setup/modelfactory.class.inc.php
+++ b/setup/modelfactory.class.inc.php
@@ -848,7 +848,7 @@ class ModelFactory
 						// Do not continue deeper
 						$oTargetNode = null;
 					} else {
-						if (!$bSpecifiedMerge && $sMode === self::LOAD_DELTA_MODE_STRICT && ($sSearchId !== '' || is_null($oSourceNode->firstElementChild))) {
+						if (!$bSpecifiedMerge && $sMode === self::LOAD_DELTA_MODE_STRICT && ($sSearchId !== '' || is_null($oSourceNode->GetFirstElementChild()))) {
 							$iLine = ModelFactory::GetXMLLineNumber($oSourceNode);
 							$sItopNodePath = DesignDocument::GetItopNodePath($oSourceNode);
 							throw new MFException($sItopNodePath.' at line '.$iLine.': could not be found or marked as removed (strict mode)',
@@ -889,7 +889,7 @@ class ModelFactory
 								$oTargetParentNode->insertBefore($oCommentNode, $oTargetNode);
 							}
 							// Continue deeper
-							for ($oSourceChild = $oSourceNode->firstElementChild; !is_null($oSourceChild); $oSourceChild = $oSourceChild->nextElementSibling) {
+							for ($oSourceChild = $oSourceNode->GetFirstElementChild(); !is_null($oSourceChild); $oSourceChild = $oSourceChild->GetNextElementSibling()) {
 								$this->LoadFlattenDelta($oSourceChild, $oTargetDocument, $oTargetNode, $sMode);
 							}
 							$oTargetNode = null;
@@ -898,7 +898,7 @@ class ModelFactory
 				}
 
 				if ($oTargetNode) {
-					if (is_null($oSourceNode->firstElementChild) && $oTargetParentNode instanceof MFElement) {
+					if (is_null($oSourceNode->GetFirstElementChild()) && $oTargetParentNode instanceof MFElement) {
 						// Leaf node
 						if ($sMode === self::LOAD_DELTA_MODE_STRICT && !$oSourceNode->hasAttribute('_rename_from') && trim($oSourceNode->GetText('')) !== '') {
 							$iLine = ModelFactory::GetXMLLineNumber($oSourceNode);
@@ -916,7 +916,7 @@ class ModelFactory
 							}
 						}
 					} else {
-						for ($oSourceChild = $oSourceNode->firstElementChild; !is_null($oSourceChild); $oSourceChild = $oSourceChild->nextElementSibling) {
+						for ($oSourceChild = $oSourceNode->GetFirstElementChild(); !is_null($oSourceChild); $oSourceChild = $oSourceChild->GetNextElementSibling()) {
 							// Continue deeper
 							$this->LoadFlattenDelta($oSourceChild, $oTargetDocument, $oTargetNode, $sMode);
 						}
@@ -1042,7 +1042,7 @@ class ModelFactory
 		}
 		if (!$bIsRoot) {
 			// Hard deletion is necessary
-			$oClassNode->remove();
+			$oClassNode->parentNode->removeChild($oClassNode);
 		}
 	}
 
@@ -1574,7 +1574,7 @@ EOF
 	public function GetClass($sClassName, $bIncludeMetas = false)
 	{
 		// Check if class among XML classes
-		/** @var \MFElemen|null $oClassNode */
+		/** @var \MFElement|null $oClassNode */
 		$oClassNode = $this->GetNodes("/itop_design/classes/class[@id='$sClassName']")->item(0);
 
 		// If not, check if class among exposed meta classes (PHP classes)