ENH PHP 8.1 compatibility

src/Controllers/ElementSiteTreeFilterSearch.php

@@ -49,7 +49,7 @@ protected function applyDefaultFilters($query)
 
             // Check whether the search term exists in the nested page content
             $pageContent = $siteTree->getElementsForSearch();
-            return stripos($pageContent, $this->params['Term']) !== false;
+            return stripos($pageContent ?? '', $this->params['Term'] ?? '') !== false;
         });
 
         if ($siteTrees->count()) {

src/Controllers/ElementalAreaController.php

@@ -48,7 +48,7 @@ public function getClientConfig()
             'saveUrl' => $this->Link('api/saveForm'),
             'saveMethod' => 'post',
             'payloadFormat' => 'json',
-            'formNameTemplate' => sprintf(static::FORM_NAME_TEMPLATE, '{id}'),
+            'formNameTemplate' => sprintf(static::FORM_NAME_TEMPLATE ?? '', '{id}'),
         ];
 
         // Configuration that is available per element type
@@ -93,7 +93,7 @@ public function getElementForm($elementID)
         /** @var Form $form */
         $form = $scaffolder->getForm(
             $this,
-            sprintf(static::FORM_NAME_TEMPLATE, $elementID),
+            sprintf(static::FORM_NAME_TEMPLATE ?? '', $elementID),
             ['Record' => $element]
         );
 
@@ -186,7 +186,7 @@ public function formAction(HTTPRequest $request)
         $formName = $request->param('FormName');
 
         // Get the element ID from the form name
-        $id = substr($formName, strlen(sprintf(self::FORM_NAME_TEMPLATE, '')));
+        $id = substr($formName ?? '', strlen(sprintf(self::FORM_NAME_TEMPLATE ?? '', '')));
         $form = $this->getElementForm($id);
 
         $field = $form->getRequestHandler()->handleField($request);
@@ -204,14 +204,14 @@ public function formAction(HTTPRequest $request)
     public static function removeNamespacesFromFields(array $data, $elementID)
     {
         $output = [];
-        $template = sprintf(EditFormFactory::FIELD_NAMESPACE_TEMPLATE, $elementID, '');
+        $template = sprintf(EditFormFactory::FIELD_NAMESPACE_TEMPLATE ?? '', $elementID, '');
         foreach ($data as $key => $value) {
             // Only look at fields that match the namespace template
-            if (substr($key, 0, strlen($template)) !== $template) {
+            if (substr($key ?? '', 0, strlen($template ?? '')) !== $template) {
                 continue;
             }
 
-            $fieldName = substr($key, strlen($template));
+            $fieldName = substr($key ?? '', strlen($template ?? ''));
             $output[$fieldName] = $value;
         }
         return $output;

src/Extensions/ElementalAreasExtension.php

@@ -16,6 +16,7 @@
 use SilverStripe\ORM\DataExtension;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\Versioned\Versioned;
+use SilverStripe\View\ViewableData;
 
 /**
  * This extension handles most of the relationships between pages and element
@@ -114,7 +115,7 @@ public function getElementalTypes()
             /** @var BaseElement $inst */
             $inst = singleton($availableClass);
 
-            if (!in_array($availableClass, $disallowedElements) && $inst->canCreate()) {
+            if (!in_array($availableClass, $disallowedElements ?? []) && $inst->canCreate()) {
                 if ($inst->hasMethod('canCreateElement') && !$inst->canCreateElement()) {
                     continue;
                 }
@@ -260,7 +261,7 @@ public function supportsElemental()
             return false;
         } elseif ($ignored = Config::inst()->get(ElementalPageExtension::class, 'ignored_classes')) {
             foreach ($ignored as $check) {
-                if (is_a($this->owner, $check)) {
+                if (is_a($this->owner, $check ?? '')) {
                     return false;
                 }
             }
@@ -327,7 +328,7 @@ public function requireDefaultRecords()
                 }
             }
 
-            $needsPublishing = Extensible::has_extension($elementalObject, Versioned::class)
+            $needsPublishing = ViewableData::has_extension($elementalObject, Versioned::class)
                 && $elementalObject->isPublished();
 
             /** @var ElementalAreasExtension $elementalObject */

src/Extensions/ElementalPageExtension.php

@@ -70,7 +70,7 @@ public function getElementsForSearch()
             // CMS layout can break on the response. (SilverStripe 4.1.1)
             SSViewer::set_themes($oldThemes);
         }
-        return implode($this->owner->config()->get('search_index_element_delimiter'), $output);
+        return implode($this->owner->config()->get('search_index_element_delimiter') ?? '', $output);
     }
 
     public function MetaTags(&$tags)

src/Forms/EditFormFactory.php

@@ -66,7 +66,7 @@ protected function namespaceFields(FieldList $fields, array $context)
         $elementID = $context['Record']->ID;
 
         foreach ($fields->dataFields() as $field) {
-            $namespacedName = sprintf(self::FIELD_NAMESPACE_TEMPLATE, $elementID, $field->getName());
+            $namespacedName = sprintf(self::FIELD_NAMESPACE_TEMPLATE ?? '', $elementID, $field->getName());
             $field->setName($namespacedName);
         }
     }

src/Forms/ElementalAreaField.php

@@ -102,7 +102,7 @@ public function FieldHolder($properties = array())
     {
         $context = $this;
 
-        if (count($properties)) {
+        if (count($properties ?? [])) {
             $context = $this->customise($properties);
         }
 
@@ -119,7 +119,7 @@ public function getSchemaDataDefaults()
         $schemaData['elemental-area-id'] = $area ? (int) $area->ID : null;
 
         $allowedTypes = $this->getTypes();
-        $schemaData['allowed-elements'] = array_keys($allowedTypes);
+        $schemaData['allowed-elements'] = array_keys($allowedTypes ?? []);
 
         return $schemaData;
     }
@@ -189,7 +189,7 @@ public function performReadonlyTransformation()
         $readOnlyField = $this->castedCopy(CompositeField::class);
         $blockReducer = $this->getReadOnlyBlockReducer();
         $readOnlyField->setChildren(
-            FieldList::create(array_map($blockReducer, $this->getArea()->Elements()->toArray()))
+            FieldList::create(array_map($blockReducer, $this->getArea()->Elements()->toArray() ?? []))
         );
 
         $readOnlyField = $readOnlyField->performReadonlyTransformation();
@@ -213,23 +213,23 @@ public function performReadonlyTransformation()
     public function setSubmittedValue($value, $data = null)
     {
         // Content comes through as a JSON encoded list through a hidden field.
-        return $this->setValue(json_decode($value, true));
+        return $this->setValue(json_decode($value ?? '', true));
     }
 
     public function saveInto(DataObjectInterface $dataObject)
     {
         parent::saveInto($dataObject);
 
         $elementData = $this->Value();
-        $idPrefixLength = strlen(sprintf(ElementalAreaController::FORM_NAME_TEMPLATE, ''));
+        $idPrefixLength = strlen(sprintf(ElementalAreaController::FORM_NAME_TEMPLATE ?? '', ''));
 
         if (!$elementData) {
             return;
         }
 
         foreach ($elementData as $form => $data) {
             // Extract the ID
-            $elementId = (int) substr($form, $idPrefixLength);
+            $elementId = (int) substr($form ?? '', $idPrefixLength ?? 0);
 
             /** @var BaseElement $element */
             $element = $this->getArea()->Elements()->byID($elementId);

src/GraphQL/Resolvers/Resolver.php

@@ -157,14 +157,14 @@ public static function newTitle(string $title = ''): ?string
         $parts = [];
 
         // does $title end with 'copy' (ignoring numbers for now)?
-        if (preg_match($hasCopyPattern, $title, $parts)) {
+        if (preg_match($hasCopyPattern ?? '', $title ?? '', $parts)) {
             $copy = $parts[1];
             // does $title end with numbers?
-            if (preg_match($hasNumPattern, $copy, $parts)) {
-                $num = trim($parts[1]);
-                $len = strlen($num);
+            if (preg_match($hasNumPattern ?? '', $copy ?? '', $parts)) {
+                $num = trim($parts[1] ?? '');
+                $len = strlen($num ?? '');
                 $inc = (int)$num + 1;
-                return substr($title, 0, -$len) . "$inc";
+                return substr($title ?? '', 0, -$len) . "$inc";
             } else {
                 return $title . ' 2';
             }

src/Models/BaseElement.php

@@ -365,7 +365,7 @@ public function getCMSFields()
 
             $styles = $this->config()->get('styles');
 
-            if ($styles && count($styles) > 0) {
+            if ($styles && count($styles ?? []) > 0) {
                 $styleDropdown = DropdownField::create('Style', _t(__CLASS__.'.STYLE', 'Style variation'), $styles);
 
                 $fields->insertBefore($styleDropdown, 'ExtraClass');
@@ -454,7 +454,7 @@ public function getController()
 
         $controllerClass = self::config()->controller_class;
 
-        if (!class_exists($controllerClass)) {
+        if (!class_exists($controllerClass ?? '')) {
             throw new Exception(
                 'Could not find controller class ' . $controllerClass . ' as defined in ' . static::class
             );
@@ -506,7 +506,7 @@ public function getSearchIndexable(): bool
     public function getContentForSearchIndex(): string
     {
         // Strips tags but be sure there's a space between words.
-        $content = trim(strip_tags(str_replace('<', ' <', $this->forTemplate())));
+        $content = trim(strip_tags(str_replace('<', ' <', $this->forTemplate() ?? '') ?? ''));
         // Allow projects to update indexable content of third-party elements.
         $this->extend('updateContentForSearchIndex', $content);
         return $content;
@@ -539,7 +539,7 @@ public function getRenderTemplates($suffix = '')
     {
         $classes = ClassInfo::ancestry($this->ClassName);
         $classes[static::class] = static::class;
-        $classes = array_reverse($classes);
+        $classes = array_reverse($classes ?? []);
         $templates = [];
 
         foreach ($classes as $key => $class) {
@@ -599,7 +599,7 @@ public function updateFromFormData($data)
      */
     protected function stripNamespacing($classname)
     {
-        $classParts = explode('\\', $classname);
+        $classParts = explode('\\', $classname ?? '');
         return array_pop($classParts);
     }
 
@@ -608,7 +608,7 @@ protected function stripNamespacing($classname)
      */
     public function getSimpleClassName()
     {
-        return strtolower($this->sanitiseClassName($this->ClassName, '__'));
+        return strtolower($this->sanitiseClassName($this->ClassName, '__') ?? '');
     }
 
     /**
@@ -833,12 +833,12 @@ public function getAreaRelationName()
      */
     public function sanitiseClassName($class, $delimiter = '-')
     {
-        return str_replace('\\', $delimiter, $class);
+        return str_replace('\\', $delimiter ?? '', $class ?? '');
     }
 
     public function unsanitiseClassName($class, $delimiter = '-')
     {
-        return str_replace($delimiter, '\\', $class);
+        return str_replace($delimiter ?? '', '\\', $class ?? '');
     }
 
     /**
@@ -1041,7 +1041,7 @@ public function getStyleVariant()
         $styles = $this->config()->get('styles');
 
         if (isset($styles[$style])) {
-            $style = strtolower($style);
+            $style = strtolower($style ?? '');
         } else {
             $style = '';
         }

src/Models/ElementalArea.php

@@ -4,7 +4,6 @@
 
 use DNADesign\Elemental\Extensions\ElementalAreasExtension;
 use SilverStripe\Core\ClassInfo;
-use SilverStripe\Core\Extensible;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\TestOnly;
 use SilverStripe\ORM\ArrayList;
@@ -14,6 +13,7 @@
 use SilverStripe\ORM\HasManyList;
 use SilverStripe\ORM\UnsavedRelationList;
 use SilverStripe\Versioned\Versioned;
+use SilverStripe\View\ViewableData;
 
 /**
  * Class ElementalArea
@@ -79,7 +79,7 @@ public function supportedPageTypes()
         $elementalClasses = [];
 
         foreach (ClassInfo::getValidSubClasses(DataObject::class) as $class) {
-            if (Extensible::has_extension($class, ElementalAreasExtension::class)) {
+            if (ViewableData::has_extension($class, ElementalAreasExtension::class)) {
                 $elementalClasses[] = $class;
             }
         }

src/Reports/ElementsInUseReport.php

@@ -166,6 +166,6 @@ public function getBreadcrumbs()
      */
     protected function unsanitiseClassName($class)
     {
-        return str_replace('-', '\\', $class);
+        return str_replace('-', '\\', $class ?? '');
     }
 }

src/Services/ElementTabProvider.php

@@ -140,6 +140,6 @@ protected function generateTabsForElement($elementClass)
      */
     protected function getCacheKey($className)
     {
-        return 'Tabs.' . str_replace(['\\'], '-', $className);
+        return 'Tabs.' . str_replace(['\\'], '-', $className ?? '');
     }
 }

src/Tasks/MigrateContentToElement.php

@@ -139,7 +139,7 @@ public function run($request)
     protected function isMigratable($pageType)
     {
         $migratable = SiteTree::has_extension($pageType, ElementalPageExtension::class);
-        if (in_array($pageType, Config::inst()->get(ElementalPageExtension::class, 'ignored_classes'))) {
+        if (in_array($pageType, Config::inst()->get(ElementalPageExtension::class, 'ignored_classes') ?? [])) {
             $migratable = false;
         }
 

src/TopPage/DataExtension.php

@@ -6,12 +6,12 @@
 use DNADesign\Elemental\Models\ElementalArea;
 use Page;
 use SilverStripe\Core\ClassInfo;
-use SilverStripe\Core\Extensible;
 use SilverStripe\ORM\DataExtension as BaseDataExtension;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\Queries\SQLUpdate;
 use SilverStripe\ORM\ValidationException;
 use SilverStripe\Versioned\Versioned;
+use SilverStripe\View\ViewableData;
 
 /**
  * Class DataExtension
@@ -96,7 +96,7 @@ public function getTopPage(): ?Page
     {
         $list = [$this->owner];
 
-        while (count($list) > 0) {
+        while (count($list ?? []) > 0) {
             /** @var DataObject|DataExtension $item */
             $item = array_shift($list);
 
@@ -380,7 +380,7 @@ protected function getTopPageTable(): string
         // Find the first ancestor table which has the extension applied
         // Note that this extension is expected to be subclassed
         foreach ($classes as $class) {
-            if (!Extensible::has_extension($class, static::class)) {
+            if (!ViewableData::has_extension($class, static::class)) {
                 continue;
             }
 

src/TopPage/SiteTreeExtension.php

@@ -104,7 +104,7 @@ public function addDuplicatedObject(DataObject $object): void
             return;
         }
 
-        if (array_key_exists($key, $this->duplicatedObjects)) {
+        if (array_key_exists($key, $this->duplicatedObjects ?? [])) {
             array_unshift($this->duplicatedObjects[$key], $object);
 
             return;
@@ -123,7 +123,7 @@ protected function getDuplicatedPageKey(): ?string
     {
         $pages = $this->duplicatedPages;
 
-        if (count($pages) === 0) {
+        if (count($pages ?? []) === 0) {
             return null;
         }
 
@@ -148,7 +148,7 @@ protected function initDuplication(Page $original): void
             return;
         }
 
-        if (in_array($key, $this->duplicatedPages)) {
+        if (in_array($key, $this->duplicatedPages ?? [])) {
             // this should never happen as it would indicate a duplication loop
             return;
         }
@@ -228,7 +228,7 @@ protected function writeDuplication(Page $original): void
             return;
         }
 
-        if (array_key_exists($key, $this->duplicatedObjects)) {
+        if (array_key_exists($key, $this->duplicatedObjects ?? [])) {
             $objects = $this->duplicatedObjects[$key];
 
             /** @var DataObject|DataExtension $object */

tests/Behat/Context/FeatureContext.php

@@ -201,7 +201,7 @@ public function stepIPressTheButtonInTheAddBlockPopover($text)
     {
         $popover = $this->getSession()->getPage()->find('css', '.popover-option-set');
 
-        $blockType = strtolower($text);
+        $blockType = strtolower($text ?? '');
 
         // Selector preferable not font-icon, but other class shared among all buttons
         $button = $popover->find('css', '.font-icon-block-'. $blockType);

tests/Behat/Context/FixtureContext.php

@@ -68,7 +68,7 @@ public function contentBlocksAreNotInLineEditable()
 
         $file = 'content-blocks-not-inline-editable.yml';
         $path = $this->getDestinationConfigFolder($file);
-        file_put_contents($path, $config);
+        file_put_contents($path ?? '', $config);
 
         $this->activatedConfigFiles[] = $path;