mirror of
https://github.com/the-djmaze/snappymail.git
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103 lines
2.8 KiB
PHP
103 lines
2.8 KiB
PHP
<?php
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namespace Sabre\VObject\Splitter;
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use Sabre\VObject;
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use Sabre\VObject\Component;
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use Sabre\VObject\Component\VCalendar;
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/**
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* Splitter.
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*
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* This class is responsible for splitting up iCalendar objects.
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*
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* This class expects a single VCALENDAR object with one or more
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* calendar-objects inside. Objects with identical UID's will be combined into
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* a single object.
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*
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* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
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* @author Dominik Tobschall (http://tobschall.de/)
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* @author Armin Hackmann
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* @license http://sabre.io/license/ Modified BSD License
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*/
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class ICalendar implements SplitterInterface
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{
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/**
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* Timezones.
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*/
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protected array $vtimezones = [];
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/**
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* iCalendar objects.
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*/
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protected array $objects = [];
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/**
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* Constructor.
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*
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* The splitter should receive a readable file stream as its input.
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*
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* @param resource $input
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* @param int $options parser options, see the OPTIONS constants
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*
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* @throws VObject\ParseException
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*/
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public function __construct($input, int $options = 0)
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{
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$data = VObject\Reader::read($input, $options);
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if (!$data instanceof VCalendar) {
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throw new VObject\ParseException('Supplied input could not be parsed as VCALENDAR.');
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}
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foreach ($data->children() as $component) {
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if (!$component instanceof Component) {
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continue;
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}
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// Get all timezones
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if ('VTIMEZONE' === $component->name) {
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$this->vtimezones[(string) $component->TZID] = $component;
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continue;
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}
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// Get component UID for recurring Events search
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if (!$component->UID) {
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$component->UID = sha1(microtime()).'-vobjectimport';
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}
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$uid = (string) $component->UID;
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// Take care of recurring events
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if (!array_key_exists($uid, $this->objects)) {
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$this->objects[$uid] = new VCalendar();
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}
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$this->objects[$uid]->add(clone $component);
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}
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}
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/**
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* Every time getNext() is called, a new object will be parsed, until we
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* hit the end of the stream.
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*
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* When the end is reached, null will be returned.
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*/
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public function getNext(): ?Component
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{
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if ($object = array_shift($this->objects)) {
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// create our baseobject
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$object->version = '2.0';
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$object->prodid = '-//Sabre//Sabre VObject '.VObject\Version::VERSION.'//EN';
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$object->calscale = 'GREGORIAN';
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// add vtimezone information to obj (if we have it)
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foreach ($this->vtimezones as $vtimezone) {
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$object->add($vtimezone);
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}
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return $object;
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} else {
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return null;
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}
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}
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}
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