Feature - disable StaticFileCache by site configuration for TYPO3 V9

Classes/Cache/Rule/SiteCacheable.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * Check if the current site is static cacheable.
+ */
+
+declare(strict_types = 1);
+
+namespace SFC\Staticfilecache\Cache\Rule;
+
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+
+/**
+ * Check if the current site is static cacheable.
+ */
+class SiteCacheable extends AbstractRule
+{
+    /**
+     * Check if the current site is static cacheable.
+     *
+     * @param TypoScriptFrontendController $frontendController
+     * @param string                       $uri
+     * @param array                        $explanation
+     * @param bool                         $skipProcessing
+     */
+    public function checkRule(TypoScriptFrontendController $frontendController, string $uri, array &$explanation, bool &$skipProcessing)
+    {
+        if (!($GLOBALS['TYPO3_REQUEST'] instanceof \TYPO3\CMS\Core\Http\ServerRequest)) {
+            return;
+        }
+        $site = $GLOBALS['TYPO3_REQUEST']->getAttribute('site');
+        if (!($site instanceof \TYPO3\CMS\Core\Site\Entity\Site)) {
+            return;
+        }
+        $config = $site->getConfiguration();
+        if (isset($config['disableStaticFileCache']) && $config['disableStaticFileCache']) {
+            $explanation[__CLASS__] = 'static cache disabled on site configuration: ' . $site->getIdentifier();
+        }
+    }
+}

Classes/Configuration.php

@@ -20,6 +20,7 @@
 use SFC\Staticfilecache\Cache\Rule\NoUserOrGroupSet;
 use SFC\Staticfilecache\Cache\Rule\NoWorkspacePreview;
 use SFC\Staticfilecache\Cache\Rule\PageCacheable;
+use SFC\Staticfilecache\Cache\Rule\SiteCacheable;
 use SFC\Staticfilecache\Cache\Rule\StaticCacheable;
 use SFC\Staticfilecache\Cache\Rule\ValidDoktype;
 use SFC\Staticfilecache\Cache\Rule\ValidRequestMethod;
@@ -112,6 +113,7 @@ public static function registerSlots()
         $ruleClasses = [
             StaticCacheable::class,
             ValidUri::class,
+            SiteCacheable::class,
             ValidDoktype::class,
             NoWorkspacePreview::class,
             NoUserOrGroupSet::class,

Configuration/SiteConfiguration/Overrides/sites.php

@@ -0,0 +1,14 @@
+<?php
+
+$GLOBALS['SiteConfiguration']['site']['columns']['disableStaticFileCache'] = [
+    'label' => 'Disable StaticFileCache',
+    'config' => [
+        'type' => 'check',
+    ],
+];
+
+$GLOBALS['SiteConfiguration']['site']['types']['0']['showitem'] = str_replace(
+    'base,',
+    'base, disableStaticFileCache, ',
+    $GLOBALS['SiteConfiguration']['site']['types']['0']['showitem']
+);