1 files changed, 58 insertions, 0 deletions
diff --git a/apps/files_sharing/src/utils/NodeShareUtils.ts b/apps/files_sharing/src/utils/NodeShareUtils.ts
new file mode 100644
index 00000000000..f14f981e2ad
--- /dev/null
+++ b/apps/files_sharing/src/utils/NodeShareUtils.ts
@@ -0,0 +1,58 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { getCurrentUser } from '@nextcloud/auth'
+import type { Node } from '@nextcloud/files'
+import { ShareType } from '@nextcloud/sharing'
+
+type Share = {
+	/** The recipient display name */
+	'display-name': string
+	/** The recipient user id */
+	id: string
+	/** The share type */
+	type: ShareType
+}
+
+const getSharesAttribute = function(node: Node) {
+	return Object.values(node.attributes.sharees).flat() as Share[]
+}
+
+export const isNodeSharedWithMe = function(node: Node) {
+	const uid = getCurrentUser()?.uid
+	const shares = getSharesAttribute(node)
+
+	// If you're the owner, you can't share with yourself
+	if (node.owner === uid) {
+		return false
+	}
+
+	return shares.length > 0 && (
+		// If some shares are shared with you as a direct user share
+		shares.some(share => share.id === uid && share.type === ShareType.User)
+		// Or of the file is shared with a group you're in
+		// (if it's returned by the backend, we assume you're in it)
+		|| shares.some(share => share.type === ShareType.Group)
+	)
+}
+
+export const isNodeSharedWithOthers = function(node: Node) {
+	const uid = getCurrentUser()?.uid
+	const shares = getSharesAttribute(node)
+
+	// If you're NOT the owner, you can't share with yourself
+	if (node.owner === uid) {
+		return false
+	}
+
+	return shares.length > 0
+		// If some shares are shared with you as a direct user share
+		&& shares.some(share => share.id !== uid && share.type !== ShareType.Group)
+}
+
+export const isNodeShared = function(node: Node) {
+	const shares = getSharesAttribute(node)
+	return shares.length > 0
+}