1 files changed, 138 insertions, 0 deletions
diff --git a/lib/private/Share/Helper.php b/lib/private/Share/Helper.php
new file mode 100644
index 00000000000..d53f9d6ed94
--- /dev/null
+++ b/lib/private/Share/Helper.php
@@ -0,0 +1,138 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OC\Share;
+
+class Helper extends \OC\Share\Constants {
+	/**
+	 * get default expire settings defined by the admin
+	 * @return array contains 'defaultExpireDateSet', 'enforceExpireDate', 'expireAfterDays'
+	 */
+	public static function getDefaultExpireSetting() {
+		$config = \OC::$server->getConfig();
+
+		$defaultExpireSettings = ['defaultExpireDateSet' => false];
+
+		// get default expire settings
+		$defaultExpireDate = $config->getAppValue('core', 'shareapi_default_expire_date', 'no');
+		if ($defaultExpireDate === 'yes') {
+			$enforceExpireDate = $config->getAppValue('core', 'shareapi_enforce_expire_date', 'no');
+			$defaultExpireSettings['defaultExpireDateSet'] = true;
+			$defaultExpireSettings['expireAfterDays'] = (int)$config->getAppValue('core', 'shareapi_expire_after_n_days', '7');
+			$defaultExpireSettings['enforceExpireDate'] = $enforceExpireDate === 'yes';
+		}
+
+		return $defaultExpireSettings;
+	}
+
+	public static function calcExpireDate() {
+		$expireAfter = \OC\Share\Share::getExpireInterval() * 24 * 60 * 60;
+		$expireAt = time() + $expireAfter;
+		$date = new \DateTime();
+		$date->setTimestamp($expireAt);
+		$date->setTime(0, 0, 0);
+		//$dateString = $date->format('Y-m-d') . ' 00:00:00';
+
+		return $date;
+	}
+
+	/**
+	 * calculate expire date
+	 * @param array $defaultExpireSettings contains 'defaultExpireDateSet', 'enforceExpireDate', 'expireAfterDays'
+	 * @param int $creationTime timestamp when the share was created
+	 * @param int $userExpireDate expire timestamp set by the user
+	 * @return mixed integer timestamp or False
+	 */
+	public static function calculateExpireDate($defaultExpireSettings, $creationTime, $userExpireDate = null) {
+		$expires = false;
+		$defaultExpires = null;
+
+		if (!empty($defaultExpireSettings['defaultExpireDateSet'])) {
+			$defaultExpires = $creationTime + $defaultExpireSettings['expireAfterDays'] * 86400;
+		}
+
+
+		if (isset($userExpireDate)) {
+			// if the admin decided to enforce the default expire date then we only take
+			// the user defined expire date of it is before the default expire date
+			if ($defaultExpires && !empty($defaultExpireSettings['enforceExpireDate'])) {
+				$expires = min($userExpireDate, $defaultExpires);
+			} else {
+				$expires = $userExpireDate;
+			}
+		} elseif ($defaultExpires && !empty($defaultExpireSettings['enforceExpireDate'])) {
+			$expires = $defaultExpires;
+		}
+
+		return $expires;
+	}
+
+	/**
+	 * Strips away a potential file names and trailing slashes:
+	 * - http://localhost
+	 * - http://localhost/
+	 * - http://localhost/index.php
+	 * - http://localhost/index.php/s/{shareToken}
+	 *
+	 * all return: http://localhost
+	 *
+	 * @param string $remote
+	 * @return string
+	 */
+	protected static function fixRemoteURL($remote) {
+		$remote = str_replace('\\', '/', $remote);
+		if ($fileNamePosition = strpos($remote, '/index.php')) {
+			$remote = substr($remote, 0, $fileNamePosition);
+		}
+		$remote = rtrim($remote, '/');
+
+		return $remote;
+	}
+
+	/**
+	 * check if two federated cloud IDs refer to the same user
+	 *
+	 * @param string $user1
+	 * @param string $server1
+	 * @param string $user2
+	 * @param string $server2
+	 * @return bool true if both users and servers are the same
+	 */
+	public static function isSameUserOnSameServer($user1, $server1, $user2, $server2) {
+		$normalizedServer1 = strtolower(\OC\Share\Share::removeProtocolFromUrl($server1));
+		$normalizedServer2 = strtolower(\OC\Share\Share::removeProtocolFromUrl($server2));
+
+		if (rtrim($normalizedServer1, '/') === rtrim($normalizedServer2, '/')) {
+			// FIXME this should be a method in the user management instead
+			\OCP\Util::emitHook(
+				'\OCA\Files_Sharing\API\Server2Server',
+				'preLoginNameUsedAsUserName',
+				['uid' => &$user1]
+			);
+			\OCP\Util::emitHook(
+				'\OCA\Files_Sharing\API\Server2Server',
+				'preLoginNameUsedAsUserName',
+				['uid' => &$user2]
+			);
+
+			if ($user1 === $user2) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public static function getTokenLength(): int {
+		$config = \OCP\Server::get(\OCP\IAppConfig::class);
+		$tokenLength = $config->getValueInt('core', 'shareapi_token_length', self::DEFAULT_TOKEN_LENGTH);
+		$tokenLength = $tokenLength ?: self::DEFAULT_TOKEN_LENGTH;
+
+		// Token length should be within the defined min and max limits
+		return max(self::MIN_TOKEN_LENGTH, min($tokenLength, self::MAX_TOKEN_LENGTH));
+	}
+}