97 lines
2.3 KiB
PHP
97 lines
2.3 KiB
PHP
<?php
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namespace Illuminate\View\Concerns;
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use Illuminate\Support\Arr;
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use Illuminate\Support\LazyCollection;
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trait ManagesLoops
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{
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/**
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* The stack of in-progress loops.
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*
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* @var array
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*/
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protected $loopsStack = [];
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/**
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* Add new loop to the stack.
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*
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* @param \Countable|array $data
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* @return void
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*/
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public function addLoop($data)
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{
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$length = is_countable($data) && ! $data instanceof LazyCollection
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? count($data)
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: null;
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$parent = Arr::last($this->loopsStack);
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$this->loopsStack[] = [
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'iteration' => 0,
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'index' => 0,
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'remaining' => $length ?? null,
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'count' => $length,
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'first' => true,
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'last' => isset($length) ? $length == 1 : null,
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'odd' => false,
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'even' => true,
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'depth' => count($this->loopsStack) + 1,
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'parent' => $parent ? (object) $parent : null,
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];
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}
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/**
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* Increment the top loop's indices.
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*
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* @return void
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*/
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public function incrementLoopIndices()
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{
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$loop = $this->loopsStack[$index = count($this->loopsStack) - 1];
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$this->loopsStack[$index] = array_merge($this->loopsStack[$index], [
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'iteration' => $loop['iteration'] + 1,
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'index' => $loop['iteration'],
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'first' => $loop['iteration'] == 0,
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'odd' => ! $loop['odd'],
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'even' => ! $loop['even'],
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'remaining' => isset($loop['count']) ? $loop['remaining'] - 1 : null,
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'last' => isset($loop['count']) ? $loop['iteration'] == $loop['count'] - 1 : null,
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]);
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}
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/**
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* Pop a loop from the top of the loop stack.
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*
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* @return void
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*/
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public function popLoop()
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{
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array_pop($this->loopsStack);
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}
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/**
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* Get an instance of the last loop in the stack.
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*
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* @return \stdClass|null
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*/
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public function getLastLoop()
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{
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if ($last = Arr::last($this->loopsStack)) {
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return (object) $last;
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}
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}
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/**
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* Get the entire loop stack.
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*
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* @return array
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*/
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public function getLoopStack()
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{
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return $this->loopsStack;
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}
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}
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