feat: add the API key check and settings for the chatbot content feed

public/typo3conf/ext/ep_products/Classes/ContentFeed/ContentFeedConfiguration.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace EP\EpProducts\ContentFeed;
+
+use TYPO3\CMS\Core\Configuration\ExtensionConfiguration;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * The chatbot content feed's extension configuration.
+ *
+ * Missing keys fall back to "feed is on, but covers nothing": a key added to ext_conf_template.txt
+ * is absent until the extension configuration is saved in the backend, and an empty feed is
+ * refused by the consumer rather than read as "everything was deleted".
+ */
+class ContentFeedConfiguration
+{
+    /**
+     * @var array
+     */
+    private $configuration;
+
+    public function __construct(ExtensionConfiguration $extensionConfiguration)
+    {
+        $this->configuration = (array) $extensionConfiguration->get('ep_products');
+    }
+
+    public function isEnabled(): bool
+    {
+        return (bool) ($this->configuration['contentFeedEnabled'] ?? true);
+    }
+
+    /**
+     * @return string[] site identifiers
+     */
+    public function getSites(): array
+    {
+        return GeneralUtility::trimExplode(',', (string) ($this->configuration['contentFeedSites'] ?? ''), true);
+    }
+
+    /**
+     * @return int[] page uids whose whole subtree stays out of the feed
+     */
+    public function getExcludedPages(): array
+    {
+        return GeneralUtility::intExplode(',', (string) ($this->configuration['contentFeedExcludedPages'] ?? ''), true);
+    }
+
+    /**
+     * @return array<string, int> site identifier => news detail page uid
+     */
+    public function getNewsDetailPages(): array
+    {
+        $pages = [];
+
+        foreach (GeneralUtility::trimExplode(',', (string) ($this->configuration['contentFeedNewsDetailPages'] ?? ''), true) as $entry) {
+            $parts = GeneralUtility::trimExplode(':', $entry, true);
+
+            if (2 === count($parts) && (int) $parts[1] > 0) {
+                $pages[$parts[0]] = (int) $parts[1];
+            }
+        }
+
+        return $pages;
+    }
+}

public/typo3conf/ext/ep_products/Classes/Http/ApiKeyAuthenticator.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace EP\EpProducts\Http;
+
+use Psr\Http\Message\ServerRequestInterface;
+use TYPO3\CMS\Core\Configuration\ExtensionConfiguration;
+
+/**
+ * Checks the shared key of the CMS backchannel endpoints (content feed, CMS index).
+ *
+ * An empty or missing `cmsApiKey` denies every request. ExtensionConfiguration::get() returns the
+ * stored configuration verbatim, so a newly added key is absent until someone saves the extension
+ * configuration in the backend - defaulting to "allow" there would publish the whole catalogue.
+ */
+class ApiKeyAuthenticator
+{
+    /**
+     * @var ExtensionConfiguration
+     */
+    private $extensionConfiguration;
+
+    public function __construct(ExtensionConfiguration $extensionConfiguration)
+    {
+        $this->extensionConfiguration = $extensionConfiguration;
+    }
+
+    public function isAuthorized(ServerRequestInterface $request): bool
+    {
+        $configured = (string) ($this->extensionConfiguration->get('ep_products')['cmsApiKey'] ?? '');
+
+        if ('' === $configured) {
+            return false;
+        }
+
+        // Header first: query-string keys end up in access logs. `key` stays accepted for parity
+        // with the existing /api/hotel and /api/product calls.
+        $provided = $request->getHeaderLine('X-Api-Key');
+
+        if ('' === $provided) {
+            $provided = (string) ($request->getQueryParams()['key'] ?? '');
+        }
+
+        return hash_equals($configured, $provided);
+    }
+}

public/typo3conf/ext/ep_products/ext_conf_template.txt

@@ -75,3 +75,18 @@ productImportSftpHostKey =
 
 # cat=SftpImport; type=int+; label=SFTP connection timeout in seconds
 productImportSftpTimeout = 15
+
+# cat=ContentFeed; type=string; label=API key for the CMS backchannel endpoints (chatbot content feed, CMS index); sent as X-Api-Key. Empty denies every request.
+cmsApiKey =
+
+# cat=ContentFeed; type=boolean; label=Serve the chatbot content feed (off: all feed endpoints answer 503)
+contentFeedEnabled = 1
+
+# cat=ContentFeed; type=string; label=Site identifiers included in the chatbot content feed (comma-separated)
+contentFeedSites = ep-reisen,ser,ski-boarderweek,ski-wochenenden,snowzone
+
+# cat=ContentFeed; type=string; label=Page uids whose subtrees stay out of the chatbot content feed (comma-separated; 634 = group booking links)
+contentFeedExcludedPages = 634
+
+# cat=ContentFeed; type=string; label=News detail page per site for the chatbot content feed (identifier:pageUid, comma-separated)
+contentFeedNewsDetailPages = ep-reisen:1392