More defensive handling of empty $contexts['layout_builder.entity'] and broken blocks
>>> [!note] Migrated issue
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<!-- Migrated from issue #3119208. -->
Reported by: [anybody](https://www.drupal.org/user/291091)
Related to !36
>>>
<p>Using page_manager with <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-7"><a href="https://www.drupal.org/project/page_manager/issues/2960739" title="Status: Closed (fixed)">#2960739: Create a layout builder variant</a></span> led us into some edge case situations which should perhaps be handled more defensive in onBuildRender(). Just wanted to let you know to decide how to handle these cases:</p>
<p>Current function looks like this:<br>
Drupal\layout_builder_st\EventSubscriber\ComponentPluginTranslate->onBuildRender():</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br></span><span style="color: #FF8000">/**<br> * Translates the plugin configuration if needed.<br> *<br> * @param \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent $event<br> * The section component render event.<br> */<br> </span><span style="color: #007700">public function </span><span style="color: #0000BB">onBuildRender</span><span style="color: #007700">(</span><span style="color: #0000BB">SectionComponentBuildRenderArrayEvent $event</span><span style="color: #007700">) {<br> if (!</span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">languageManager</span><span style="color: #007700">-></span><span style="color: #0000BB">isMultilingual</span><span style="color: #007700">()) {<br> return;<br> }<br> </span><span style="color: #0000BB">$plugin </span><span style="color: #007700">= </span><span style="color: #0000BB">$event</span><span style="color: #007700">-></span><span style="color: #0000BB">getPlugin</span><span style="color: #007700">();<br> </span><span style="color: #0000BB">$contexts </span><span style="color: #007700">= </span><span style="color: #0000BB">$event</span><span style="color: #007700">-></span><span style="color: #0000BB">getContexts</span><span style="color: #007700">();<br> </span><span style="color: #0000BB">$component </span><span style="color: #007700">= </span><span style="color: #0000BB">$event</span><span style="color: #007700">-></span><span style="color: #0000BB">getComponent</span><span style="color: #007700">();<br> if (!</span><span style="color: #0000BB">$plugin </span><span style="color: #007700">instanceof </span><span style="color: #0000BB">ConfigurableInterface </span><span style="color: #007700">&& !isset(</span><span style="color: #0000BB">$contexts</span><span style="color: #007700">[</span><span style="color: #DD0000">'layout_builder.entity'</span><span style="color: #007700">])) {<br> return;<br> }<br><br> </span><span style="color: #FF8000">// @todo Change to 'entity' in https://www.drupal.org/node/3018782.<br> </span><span style="color: #0000BB">$entity </span><span style="color: #007700">= </span><span style="color: #0000BB">$contexts</span><span style="color: #007700">[</span><span style="color: #DD0000">'layout_builder.entity'</span><span style="color: #007700">]-></span><span style="color: #0000BB">getContextValue</span><span style="color: #007700">();<br> </span><span style="color: #0000BB">$configuration </span><span style="color: #007700">= </span><span style="color: #0000BB">$plugin</span><span style="color: #007700">-></span><span style="color: #0000BB">getConfiguration</span><span style="color: #007700">();<br> if (</span><span style="color: #0000BB">$event</span><span style="color: #007700">-></span><span style="color: #0000BB">inPreview</span><span style="color: #007700">()) {<br> </span><span style="color: #0000BB">$section_storage </span><span style="color: #007700">= </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">routeMatch</span><span style="color: #007700">-></span><span style="color: #0000BB">getParameter</span><span style="color: #007700">(</span><span style="color: #DD0000">'section_storage'</span><span style="color: #007700">);<br> }<br> else {<br> </span><span style="color: #0000BB">$section_storage </span><span style="color: #007700">= </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">getSectionStorageForEntity</span><span style="color: #007700">(</span><span style="color: #0000BB">$entity</span><span style="color: #007700">);<br> }<br><br> if (static::</span><span style="color: #0000BB">isTranslation</span><span style="color: #007700">(</span><span style="color: #0000BB">$section_storage</span><span style="color: #007700">)) {<br> if (</span><span style="color: #0000BB">$translated_plugin_configuration </span><span style="color: #007700">= </span><span style="color: #0000BB">$section_storage</span><span style="color: #007700">-></span><span style="color: #0000BB">getTranslatedComponentConfiguration</span><span style="color: #007700">(</span><span style="color: #0000BB">$component</span><span style="color: #007700">-></span><span style="color: #0000BB">getUuid</span><span style="color: #007700">())) {<br> </span><span style="color: #0000BB">$translated_plugin_configuration </span><span style="color: #007700">+= </span><span style="color: #0000BB">$configuration</span><span style="color: #007700">;<br> </span><span style="color: #0000BB">$plugin</span><span style="color: #007700">-></span><span style="color: #0000BB">setConfiguration</span><span style="color: #007700">(</span><span style="color: #0000BB">$translated_plugin_configuration</span><span style="color: #007700">);<br> }<br> }<br> }<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>1. In a situation with a broken block (missing view) the variable</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br>$plugin<br>?></span></span></pre></div>
<p>was instanceof Drupal\Core\Block\Plugin\Block\Broken which resulted in a PHP error.</p>
<p>2. $contexts['layout_builder.entity'] is NULL in layout_builder which leads to null pointer in</p>
<div class="codeblock">
<pre><span style="color: #000000"><span style="color: #0000BB"><?php<br>$entity </span><span style="color: #007700">= </span><span style="color: #0000BB">$contexts</span><span style="color: #007700">[</span><span style="color: #DD0000">'layout_builder.entity'</span><span style="color: #007700">]-></span><span style="color: #0000BB">getContextValue</span><span style="color: #007700">();<br></span><span style="color: #0000BB">?></span></span></pre></div>
<p>I have no deeper understanding of the code in this area so I hope my bug report is helpful for this module and / or the core patch.</p>
<p>Thank you very much again.</p>
issue
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