feat(capabilities): dynamic mimetype discovery from wopi xml

Signed-off-by: Florian Wagner <f.wagner81@gmail.com>

Author: multiphlow

lib/Capabilities.php

@@ -9,6 +9,7 @@
 namespace OCA\Richdocuments;
 
 use OCA\Richdocuments\Service\CapabilitiesService;
+use OCA\Richdocuments\Service\DiscoveryService;
 use OCP\App\IAppManager;
 use OCP\Capabilities\ICapability;
 use OCP\IURLGenerator;
@@ -96,6 +97,7 @@ public function __construct(
 		private IAppManager $appManager,
 		private ?string $userId,
 		private IURLGenerator $urlGenerator,
+        private DiscoveryService $discoveryService,
 	) {
 	}
 
@@ -140,7 +142,7 @@ public function getCapabilities() {
 	 * @return list<string>
 	 */
 	public function getDefaultMimetypes(): array {
-		$defaultMimetypes = self::MIMETYPES;
+		$defaultMimetypes = $this->discoveryService->getSupportedMimeTypes() ?: self::MIMETYPES;
 
 		if (!$this->capabilitiesService->hasOtherOOXMLApps()) {
 			array_push($defaultMimetypes, ...self::MIMETYPES_MSOFFICE);
@@ -150,7 +152,7 @@ public function getDefaultMimetypes(): array {
 			$defaultMimetypes[] = 'application/pdf';
 		}
 
-		return $defaultMimetypes;
+		return array_unique($defaultMimetypes);
 	}
 
 	/**

lib/Service/DiscoveryService.php

@@ -127,4 +127,35 @@ private function getParsed(): SimpleXMLElement {
 			throw new \Exception('Could not parse discovery XML');
 		}
 	}
+
+    /**
+     * Dynamically get all supported mime types out of the discovery XML
+     * @todo Currently no categories given from endpoint
+     *
+     * @return array
+     * @throws \Exception
+     */
+    public function getSupportedMimeTypes(): array
+    {
+        $mimeTypes = [];
+
+        try {
+            $parsed = $this->getParsed();
+        } catch (\Exception $e) {
+            // @todo fallback to a default set instead of empty array
+            return $mimeTypes;
+        }
+
+        foreach ($parsed->xpath('//net-zone/app') as $app) {
+            $mimeTypeName = (string)$app['name']; // (e.g. "application/pdf")
+
+            // Filter (Settings, Capabilities, etc.)
+            if (!str_contains($mimeTypeName, '/')) {
+                continue;
+            }
+            $mimeTypes[] = $mimeTypeName;
+        }
+
+        return array_unique($mimeTypes);
+    }
 }