feat: add preview provider for emf files based on office

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

5 files changed, 47 insertions, 0 deletions

diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index cb94551e35e..a9af6f4ef98 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -1534,6 +1534,7 @@ return array(
     'OC\\Preview\\BackgroundCleanupJob' => $baseDir . '/lib/private/Preview/BackgroundCleanupJob.php',
     'OC\\Preview\\Bitmap' => $baseDir . '/lib/private/Preview/Bitmap.php',
     'OC\\Preview\\Bundled' => $baseDir . '/lib/private/Preview/Bundled.php',
+    'OC\\Preview\\EMF' => $baseDir . '/lib/private/Preview/EMF.php',
     'OC\\Preview\\Font' => $baseDir . '/lib/private/Preview/Font.php',
     'OC\\Preview\\GIF' => $baseDir . '/lib/private/Preview/GIF.php',
     'OC\\Preview\\Generator' => $baseDir . '/lib/private/Preview/Generator.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index b19f568ac1f..89bab8addb9 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -1567,6 +1567,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Preview\\BackgroundCleanupJob' => __DIR__ . '/../../..' . '/lib/private/Preview/BackgroundCleanupJob.php',
         'OC\\Preview\\Bitmap' => __DIR__ . '/../../..' . '/lib/private/Preview/Bitmap.php',
         'OC\\Preview\\Bundled' => __DIR__ . '/../../..' . '/lib/private/Preview/Bundled.php',
+        'OC\\Preview\\EMF' => __DIR__ . '/../../..' . '/lib/private/Preview/EMF.php',
         'OC\\Preview\\Font' => __DIR__ . '/../../..' . '/lib/private/Preview/Font.php',
         'OC\\Preview\\GIF' => __DIR__ . '/../../..' . '/lib/private/Preview/GIF.php',
         'OC\\Preview\\Generator' => __DIR__ . '/../../..' . '/lib/private/Preview/Generator.php',
diff --git a/lib/private/Preview/EMF.php b/lib/private/Preview/EMF.php
new file mode 100644
index 00000000000..2b5f40e66af
--- /dev/null
+++ b/lib/private/Preview/EMF.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2023 Daniel Kesselberg <mail@danielkesselberg.de>
+ *
+ * @author Daniel Kesselberg <mail@danielkesselberg.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\Preview;
+
+class EMF extends Office {
+	public function getMimeType(): string {
+		return '/image\/emf/';
+	}
+}
diff --git a/lib/private/PreviewManager.php b/lib/private/PreviewManager.php
index 3af6848686e..8e41662262d 100644
--- a/lib/private/PreviewManager.php
+++ b/lib/private/PreviewManager.php
@@ -408,6 +408,7 @@ class PreviewManager implements IPreview {
 					$this->registerCoreProvider(Preview\MSOffice2007::class, '/application\/vnd.openxmlformats-officedocument.*/', ["officeBinary" => $officeBinary]);
 					$this->registerCoreProvider(Preview\OpenDocument::class, '/application\/vnd.oasis.opendocument.*/', ["officeBinary" => $officeBinary]);
 					$this->registerCoreProvider(Preview\StarOffice::class, '/application\/vnd.sun.xml.*/', ["officeBinary" => $officeBinary]);
+					$this->registerCoreProvider(Preview\EMF::class, '/image\/emf/', ['officeBinary' => $officeBinary]);
 				}
 			}
 		}
diff --git a/lib/private/Repair/RepairMimeTypes.php b/lib/private/Repair/RepairMimeTypes.php
index ee5a84ad65c..cab8d8ca02a 100644
--- a/lib/private/Repair/RepairMimeTypes.php
+++ b/lib/private/Repair/RepairMimeTypes.php
@@ -229,6 +229,13 @@ class RepairMimeTypes implements IRepairStep {
 		return $this->updateMimetypes($updatedMimetypes);
 	}
 
+	private function introduceEnhancedMetafileFormatType() {
+		$updatedMimetypes = [
+			'emf' => 'image/emf',
+		];
+
+		return $this->updateMimetypes($updatedMimetypes);
+	}
 
 	/**
 	 * Fix mime types
@@ -286,5 +293,9 @@ class RepairMimeTypes implements IRepairStep {
 		if (version_compare($ocVersionFromBeforeUpdate, '26.0.0.1', '<') && $this->introduceAsciidocType()) {
 			$out->info('Fixed AsciiDoc mime types');
 		}
+
+		if (version_compare($ocVersionFromBeforeUpdate, '28.0.0.5', '<') && $this->introduceEnhancedMetafileFormatType()) {
+			$out->info('Fixed Enhanced Metafile Format mime types');
+		}
 	}
 }