package and depencies

vendor/nette/utils/src/Iterators/CachingIterator.php

@@ -0,0 +1,167 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Nette\Iterators;
+
+use Nette;
+
+
+/**
+ * Smarter caching iterator.
+ *
+ * @property-read bool $first
+ * @property-read bool $last
+ * @property-read bool $empty
+ * @property-read bool $odd
+ * @property-read bool $even
+ * @property-read int $counter
+ * @property-read mixed $nextKey
+ * @property-read mixed $nextValue
+ */
+class CachingIterator extends \CachingIterator implements \Countable
+{
+	use Nette\SmartObject;
+
+	/** @var int */
+	private $counter = 0;
+
+
+	public function __construct($iterator)
+	{
+		if (is_array($iterator) || $iterator instanceof \stdClass) {
+			$iterator = new \ArrayIterator($iterator);
+
+		} elseif ($iterator instanceof \IteratorAggregate) {
+			do {
+				$iterator = $iterator->getIterator();
+			} while ($iterator instanceof \IteratorAggregate);
+
+			assert($iterator instanceof \Iterator);
+
+		} elseif ($iterator instanceof \Iterator) {
+		} elseif ($iterator instanceof \Traversable) {
+			$iterator = new \IteratorIterator($iterator);
+		} else {
+			throw new Nette\InvalidArgumentException(sprintf('Invalid argument passed to %s; array or Traversable expected, %s given.', self::class, is_object($iterator) ? get_class($iterator) : gettype($iterator)));
+		}
+
+		parent::__construct($iterator, 0);
+	}
+
+
+	/**
+	 * Is the current element the first one?
+	 */
+	public function isFirst(?int $gridWidth = null): bool
+	{
+		return $this->counter === 1 || ($gridWidth && $this->counter !== 0 && (($this->counter - 1) % $gridWidth) === 0);
+	}
+
+
+	/**
+	 * Is the current element the last one?
+	 */
+	public function isLast(?int $gridWidth = null): bool
+	{
+		return !$this->hasNext() || ($gridWidth && ($this->counter % $gridWidth) === 0);
+	}
+
+
+	/**
+	 * Is the iterator empty?
+	 */
+	public function isEmpty(): bool
+	{
+		return $this->counter === 0;
+	}
+
+
+	/**
+	 * Is the counter odd?
+	 */
+	public function isOdd(): bool
+	{
+		return $this->counter % 2 === 1;
+	}
+
+
+	/**
+	 * Is the counter even?
+	 */
+	public function isEven(): bool
+	{
+		return $this->counter % 2 === 0;
+	}
+
+
+	/**
+	 * Returns the counter.
+	 */
+	public function getCounter(): int
+	{
+		return $this->counter;
+	}
+
+
+	/**
+	 * Returns the count of elements.
+	 */
+	public function count(): int
+	{
+		$inner = $this->getInnerIterator();
+		if ($inner instanceof \Countable) {
+			return $inner->count();
+
+		} else {
+			throw new Nette\NotSupportedException('Iterator is not countable.');
+		}
+	}
+
+
+	/**
+	 * Forwards to the next element.
+	 */
+	public function next(): void
+	{
+		parent::next();
+		if (parent::valid()) {
+			$this->counter++;
+		}
+	}
+
+
+	/**
+	 * Rewinds the Iterator.
+	 */
+	public function rewind(): void
+	{
+		parent::rewind();
+		$this->counter = parent::valid() ? 1 : 0;
+	}
+
+
+	/**
+	 * Returns the next key.
+	 * @return mixed
+	 */
+	public function getNextKey()
+	{
+		return $this->getInnerIterator()->key();
+	}
+
+
+	/**
+	 * Returns the next element.
+	 * @return mixed
+	 */
+	public function getNextValue()
+	{
+		return $this->getInnerIterator()->current();
+	}
+}

vendor/nette/utils/src/Iterators/Mapper.php

@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Nette\Iterators;
+
+
+
+/**
+ * Applies the callback to the elements of the inner iterator.
+ */
+class Mapper extends \IteratorIterator
+{
+	/** @var callable */
+	private $callback;
+
+
+	public function __construct(\Traversable $iterator, callable $callback)
+	{
+		parent::__construct($iterator);
+		$this->callback = $callback;
+	}
+
+
+	#[\ReturnTypeWillChange]
+	public function current()
+	{
+		return ($this->callback)(parent::current(), parent::key());
+	}
+}