Set files_sharing:hide_disabled_user_shares to 'yes' to hide shares from disabled users

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

lib/private/Share20/Manager.php

@@ -1318,7 +1318,7 @@ class Manager implements IManager {
 			$added = 0;
 			foreach ($shares as $share) {
 				try {
-					$this->checkExpireDate($share);
+					$this->checkShare($share);
 				} catch (ShareNotFound $e) {
 					//Ignore since this basically means the share is deleted
 					continue;
@@ -1377,7 +1377,7 @@ class Manager implements IManager {
 		// remove all shares which are already expired
 		foreach ($shares as $key => $share) {
 			try {
-				$this->checkExpireDate($share);
+				$this->checkShare($share);
 			} catch (ShareNotFound $e) {
 				unset($shares[$key]);
 			}
@@ -1423,7 +1423,7 @@ class Manager implements IManager {
 
 		$share = $provider->getShareById($id, $recipient);
 
-		$this->checkExpireDate($share);
+		$this->checkShare($share);
 
 		return $share;
 	}
@@ -1507,7 +1507,7 @@ class Manager implements IManager {
 			throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
 		}
 
-		$this->checkExpireDate($share);
+		$this->checkShare($share);
 
 		/*
 		 * Reduce the permissions for link or email shares if public upload is not enabled
@@ -1520,11 +1520,25 @@ class Manager implements IManager {
 		return $share;
 	}
 
-	protected function checkExpireDate($share) {
+	/**
+	 * Check expire date and disabled owner
+	 *
+	 * @throws ShareNotFound
+	 */
+	protected function checkShare(IShare $share): void {
 		if ($share->isExpired()) {
 			$this->deleteShare($share);
 			throw new ShareNotFound($this->l->t('The requested share does not exist anymore'));
 		}
+		if ($this->config->getAppValue('files_sharing', 'hide_disabled_user_shares', 'no') === 'yes') {
+			$uids = array_unique([$share->getShareOwner(),$share->getSharedBy()]);
+			foreach ($uids as $uid) {
+				$user = $this->userManager->get($uid);
+				if (($user !== null) && !$user->isEnabled()) {
+					throw new ShareNotFound($this->l->t('The requested share comes from a disabled user'));
+				}
+			}
+		}
 	}
 
 	/**