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<?php
/**
* Copyright (c) 2017. Robin Radic.
*
* The license can be found in the package and online at https://radic.mit-license.org.
*
* @copyright 2017 Robin Radic
* @license https://radic.mit-license.org MIT License
* @version 7.0.0 Radic\BladeExtensions
*/
namespace Radic\BladeExtensions\Helpers\Loop;
/**
* Represents the $loop variable in the foreach directive. Handles all data.
*
* @version 2.1.0
* @author Robin Radic
* @license MIT License - http://radic.mit-license.org
* @copyright 2011-2015, Robin Radic - Radic Technologies
* @link http://robin.radic.nl/blade-extensions
*
* @property bool $odd
* @property bool $even
*
* @property int index The index of the current loop iteration (starts at 0).
* @property int $index1 The current loop iteration (starts at 1).
* @property int iteration The current loop iteration (starts at 1).
*
* @property int $revindex1 The iteration remaining in the loop.
* @property int $revindex The iteration remaining in the loop.
* @property int remaining The iteration remaining in the loop.
*
* @property int count The total number of items in the array being iterated.
* @property int $total The total number of items in the array being iterated.
* @property bool first Whether this is the first iteration through the loop.
* @property bool last Whether this is the last iteration through the loop.
* @property int depth The nesting level of the current loop.
* @property Loop|null parent When in a nested loop, the parent's loop variable.
* @property Loop|null $parentLoop When in a nested loop, the parent's loop variable.
*/
class Loop
{
/**
* The array that is being iterated.
*
* @var array
*/
protected $items = [];
/**
* The data for the current $loop item.
*
* @var array
*/
protected $data;
/**
* The parent loop, if any.
*
* @var Loop
*/
protected $parentLoop;
protected $loopHelper;
protected $aliases = [];
/**
* Sets the parent loop.
*
* @param Loop $parentLoop
* {@inheritdoc}
*/
public function setParentLoop(Loop $parentLoop)
{
$this->parentLoop = $parentLoop;
$this->data['parent'] = $parentLoop;
}
/**
* Returns the full loop stack of the LoopFactory.
*
* @return array
*/
public function getLoopStack()
{
return $this->loopHelper->getStack();
}
/**
* Resets the loop stack of the LoopFactory.
*/
public function resetLoopStack()
{
$this->loopHelper->reset();
}
/**
* Instantiates the class.
*
* @param \Radic\BladeExtensions\Helpers\Loop\LoopHelper $loopHelper
* @param array $items The array that's being iterated
*/
public function __construct(LoopHelper $loopHelper, $items)
{
$this->loopHelper = $loopHelper;
$this->setItems($items);
}
/**
* Sets the array to monitor.
*
* @param array $items The array that's being iterated
*/
public function setItems($items)
{
if (isset($data)) {
return;
}
$this->items = $items;
$total = count($items);
$this->data = [
'index1' => 1,
'index' => 0,
'revindex1' => $total,
'revindex' => $total - 1,
'first' => true,
'last' => false,
'odd' => false,
'even' => true,
'length' => $total,
];
}
/**
* getItems method.
*
* @return array
*/
public function getItems()
{
return $this->items;
}
/**
* Magic method to access the loop data properties.
*
* @param $key
*
* @return mixed
*/
public function __get($key)
{
$aliases = [
'iteration' => 'index1',
'remaining' => 'revindex1',
'parentLoop' => 'parent',
'count' => 'length',
];
if (array_key_exists($key, $aliases)) {
return $this->data[$aliases[$key]];
}
return $this->data[$key];
}
/**
* __set method.
*
* @param $key
* @param $val
*
* @return void
*/
public function __set($key, $val)
{
// do not allow setting the data
}
/**
* __isset method.
*
* @param $key
*
* @return bool
*/
public function __isset($key)
{
return isset($this->data[$key]);
}
/**
* To be called first in a loop before anything else.
*/
public function before()
{
if ($this->data['index'] % 2 == 0) {
$this->data['odd'] = false;
$this->data['even'] = true;
} else {
$this->data['odd'] = true;
$this->data['even'] = false;
}
if ($this->data['index'] == 0) {
$this->data['first'] = true;
} else {
$this->data['first'] = false;
}
if ($this->data['revindex'] == 0) {
$this->data['last'] = true;
} else {
$this->data['last'] = false;
}
}
/**
* To be called last in a loop after everything else.
*/
public function after()
{
$this->data['index']++;
$this->data['index1']++;
$this->data['revindex']--;
$this->data['revindex1']--;
}
}