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<?php |
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/** |
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* This file is part of graze/data-file |
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* |
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* Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @license https://github.com/graze/data-file/blob/master/LICENSE.md |
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* @link https://github.com/graze/data-file |
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*/ |
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namespace Graze\DataFile\Node; |
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use Graze\DataNode\NodeCollection; |
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use InvalidArgumentException; |
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/** |
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* Class FileNodeCollection |
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* |
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* @package Graze\DataFile\Node\File |
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*/ |
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class FileNodeCollection extends NodeCollection implements FileNodeCollectionInterface |
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{ |
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/** |
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* For a given set of files, return any common prefix (i.e. directory, s3 key) |
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* |
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* @return string|null |
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*/ |
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public function getCommonPrefix() |
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{ |
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if ($this->count() == 0) { |
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return null; |
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} |
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$commonPath = $this->reduce(function ($commonPath, FileNodeInterface $file) { |
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if (is_null($commonPath)) { |
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return $file->getPath(); |
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} |
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return $this->getCommonPrefixString($commonPath, $file->getPath()); |
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}); |
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return (strlen($commonPath) > 0) ? $commonPath : null; |
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} |
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/** |
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* @param string $left |
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* @param string $right |
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* |
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* @return string |
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*/ |
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private function getCommonPrefixString($left, $right) |
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{ |
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for ($i = 1; $i < strlen($left); $i++) { |
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if (substr_compare($left, $right, 0, $i) !== 0) { |
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return substr($left, 0, $i - 1); |
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1 |
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} |
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} |
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return substr($left, 0, $i); |
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} |
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/** |
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* @param mixed $value |
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* |
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* @return $this |
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*/ |
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public function add($value) |
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{ |
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if (!($value instanceof FileNodeInterface)) { |
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throw new InvalidArgumentException("The specified value does not implement FileNodeInterface"); |
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} |
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return parent::add($value); |
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} |
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} |
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graze /
data-file
