MaketRandevu/application/libraries/Ics_provider.php

162 lines
3.9 KiB
PHP

<?php defined('BASEPATH') or exit('No direct script access allowed');
/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
* @link http://easyappointments.org
* @since v1.4.3
* ---------------------------------------------------------------------------- */
/**
* Class Ics_calendar
*
* This class replaces the Jsvrcek\ICS\Utility\Provider so that it becomes a PHP 8.1 compatible Iterator class.
*
* Since the method signatures changed in PHP 8.1, the ReturnTypeWillChange attribute allows us to keep compatibility
* between different PHP versions.
*/
class Ics_provider implements Iterator
{
/**
* @var array
*/
public $data = [];
/**
* @var array
*/
public $manuallyAddedData = [];
/**
* @var Closure
*/
private $provider;
/**
* @var integer
*/
private $key;
/**
* @var mixed
*/
private $first;
/**
* @param Closure $provider An optional closure for adding items in batches during iteration. The closure will be
* called each time the end of the internal data array is reached during iteration, and the current data
* array key value will be passed as an argument. The closure should return an array containing the next
* batch of items.
*/
public function __construct(Closure $provider = null)
{
$this->provider = $provider;
}
/**
* for manually adding items, rather than using a provider closure to add items in batches during iteration
* Cannot be used in conjunction with a provider closure!
*
* @param mixed $item
* @return void
*/
#[ReturnTypeWillChange]
public function add($item)
{
$this->manuallyAddedData[] = $item;
}
/**
* @return false|mixed
* @see Iterator::current()
*/
#[ReturnTypeWillChange]
public function current()
{
return current($this->data);
}
/**
* @return float|int|null
* @see Iterator::key()
*/
#[ReturnTypeWillChange]
public function key()
{
return $this->key;
}
/**
* @return void
* @see Iterator::next()
*/
#[ReturnTypeWillChange]
public function next()
{
array_shift($this->data);
$this->key++;
}
/**
* @return void
* @see Iterator::rewind()
*/
#[ReturnTypeWillChange]
public function rewind()
{
$this->data = [];
$this->key = 0;
}
/**
* Returns first event
*
* @return false|mixed
*/
#[ReturnTypeWillChange]
public function first()
{
if (isset($this->first)) {
return $this->first;
}
if ($this->provider instanceof Closure) {
if ($this->valid()) {
return $this->first;
} else {
return false;
}
}
if (!isset($this->manuallyAddedData[0])) {
return false;
}
return $this->manuallyAddedData[0];
}
/**
* get next batch from provider if data array is at the end
*
* @return bool
* @see Iterator::valid()
*/
#[ReturnTypeWillChange]
public function valid()
{
if (count($this->data) < 1) {
if ($this->provider instanceof Closure) {
$this->data = $this->provider->__invoke($this->key);
if (isset($this->data[0])) {
$this->first = $this->data[0];
}
} else {
$this->data = $this->manuallyAddedData;
$this->manuallyAddedData = [];
}
}
return count($this->data) > 0;
}
}