feat(files): add mime icon endpoint

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

Author: skjnldsv

apps/files/openapi.json

@@ -2330,11 +2330,16 @@
                                                 "data": {
                                                     "type": "object",
                                                     "required": [
-                                                        "path"
+                                                        "path",
+                                                        "fileId"
                                                     ],
                                                     "properties": {
                                                         "path": {
                                                             "type": "string"
+                                                        },
+                                                        "fileId": {
+                                                            "type": "integer",
+                                                            "format": "int64"
                                                         }
                                                     }
                                                 }

core/Controller/PreviewController.php

@@ -14,6 +14,7 @@
 use OCP\AppFramework\Http\Attribute\NoAdminRequired;
 use OCP\AppFramework\Http\Attribute\NoCSRFRequired;
 use OCP\AppFramework\Http\Attribute\OpenAPI;
+use OCP\AppFramework\Http\Attribute\PublicPage;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\AppFramework\Http\FileDisplayResponse;
 use OCP\AppFramework\Http\RedirectResponse;
@@ -183,4 +184,25 @@ private function fetchPreview(
 			return new DataResponse([], Http::STATUS_BAD_REQUEST);
 		}
 	}
+
+	/**
+	 * Get a preview by mime
+	 *
+	 * @param string $mime Mime type
+	 * @return RedirectResponse<Http::STATUS_SEE_OTHER, array{}>
+	 *
+	 * 303: The mime icon url
+	 */
+	#[NoCSRFRequired]
+	#[PublicPage]
+	#[FrontpageRoute(verb: 'GET', url: '/core/mimeicon')]
+	#[OpenAPI(scope: OpenAPI::SCOPE_DEFAULT)]
+	public function getMimeIconUrl(string $mime = 'application/octet-stream') {
+		$url = $this->mimeIconProvider->getMimeIconUrl($mime);
+		if ($url === null) {
+			$url = $this->mimeIconProvider->getMimeIconUrl('application/octet-stream');
+		}
+
+		return new RedirectResponse($url);
+	}
 }