1 files changed, 73 insertions, 0 deletions
diff --git a/lib/private/Collaboration/Collaborators/RemoteGroupPlugin.php b/lib/private/Collaboration/Collaborators/RemoteGroupPlugin.php
new file mode 100644
index 00000000000..f4c1793ea0a
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+++ b/lib/private/Collaboration/Collaborators/RemoteGroupPlugin.php
@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\Collaboration\Collaborators;
+
+use OCP\Collaboration\Collaborators\ISearchPlugin;
+use OCP\Collaboration\Collaborators\ISearchResult;
+use OCP\Collaboration\Collaborators\SearchResultType;
+use OCP\Federation\ICloudFederationProviderManager;
+use OCP\Federation\ICloudIdManager;
+use OCP\Share;
+use OCP\Share\IShare;
+
+class RemoteGroupPlugin implements ISearchPlugin {
+	private bool $enabled = false;
+
+	public function __construct(
+		ICloudFederationProviderManager $cloudFederationProviderManager,
+		private ICloudIdManager $cloudIdManager,
+	) {
+		try {
+			$fileSharingProvider = $cloudFederationProviderManager->getCloudFederationProvider('file');
+			$supportedShareTypes = $fileSharingProvider->getSupportedShareTypes();
+			if (in_array('group', $supportedShareTypes)) {
+				$this->enabled = true;
+			}
+		} catch (\Exception $e) {
+			// do nothing, just don't enable federated group shares
+		}
+	}
+
+	public function search($search, $limit, $offset, ISearchResult $searchResult): bool {
+		$result = ['wide' => [], 'exact' => []];
+		$resultType = new SearchResultType('remote_groups');
+
+		if ($this->enabled && $this->cloudIdManager->isValidCloudId($search) && $offset === 0) {
+			[$remoteGroup, $serverUrl] = $this->splitGroupRemote($search);
+			$result['exact'][] = [
+				'label' => $remoteGroup . " ($serverUrl)",
+				'guid' => $remoteGroup,
+				'name' => $remoteGroup,
+				'value' => [
+					'shareType' => IShare::TYPE_REMOTE_GROUP,
+					'shareWith' => $search,
+					'server' => $serverUrl,
+				],
+			];
+		}
+
+		$searchResult->addResultSet($resultType, $result['wide'], $result['exact']);
+
+		return true;
+	}
+
+	/**
+	 * split group and remote from federated cloud id
+	 *
+	 * @param string $address federated share address
+	 * @return array [user, remoteURL]
+	 * @throws \InvalidArgumentException
+	 */
+	public function splitGroupRemote($address): array {
+		try {
+			$cloudId = $this->cloudIdManager->resolveCloudId($address);
+			return [$cloudId->getUser(), $cloudId->getRemote()];
+		} catch (\InvalidArgumentException $e) {
+			throw new \InvalidArgumentException('Invalid Federated Cloud ID', 0, $e);
+		}
+	}
+}