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106 lines
2.5 KiB
PHP
106 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OCA\DAV\CardDAV\Integration;
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use Sabre\CardDAV\IAddressBook;
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use Sabre\DAV;
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/**
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* @since 19.0.0
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*/
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abstract class ExternalAddressBook implements IAddressBook, DAV\IProperties {
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/** @var string */
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private const PREFIX = 'z-app-generated';
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/**
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* @var string
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*
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* Double dash is a valid delimiter,
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* because it will always split the URIs correctly:
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* - our prefix contains only one dash and won't be split
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* - appIds are not allowed to contain dashes as per spec:
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* > must contain only lowercase ASCII characters and underscore
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* - explode has a limit of three, so even if the app-generated
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* URI has double dashes, it won't be split
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*/
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private const DELIMITER = '--';
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public function __construct(
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private string $appId,
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private string $uri,
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) {
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}
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/**
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* @inheritDoc
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*/
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final public function getName() {
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return implode(self::DELIMITER, [
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self::PREFIX,
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$this->appId,
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$this->uri,
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]);
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}
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/**
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* @inheritDoc
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*/
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final public function setName($name) {
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throw new DAV\Exception\MethodNotAllowed('Renaming address books is not yet supported');
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}
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/**
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* @inheritDoc
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*/
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final public function createDirectory($name) {
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throw new DAV\Exception\MethodNotAllowed('Creating collections in address book objects is not allowed');
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}
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/**
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* Checks whether the address book uri is app-generated
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*
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* @param string $uri
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*
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* @return bool
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*/
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public static function isAppGeneratedAddressBook(string $uri): bool {
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return str_starts_with($uri, self::PREFIX) && substr_count($uri, self::DELIMITER) >= 2;
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}
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/**
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* Splits an app-generated uri into appId and uri
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*
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* @param string $uri
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*
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* @return array
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*/
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public static function splitAppGeneratedAddressBookUri(string $uri): array {
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$array = array_slice(explode(self::DELIMITER, $uri, 3), 1);
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// Check the array has expected amount of elements
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// and none of them is an empty string
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if (\count($array) !== 2 || \in_array('', $array, true)) {
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throw new \InvalidArgumentException('Provided address book uri was not app-generated');
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}
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return $array;
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}
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/**
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* Checks whether a address book name the user wants to create violates
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* the reserved name for URIs
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*
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* @param string $uri
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*
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* @return bool
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*/
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public static function doesViolateReservedName(string $uri): bool {
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return str_starts_with($uri, self::PREFIX);
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}
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}
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