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3 liveuser 1 
<?php
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/*
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 * This file is part of the Symfony package.
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 *
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 * (c) Fabien Potencier <fabien@symfony.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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namespace Symfony\Component\Routing\Matcher\Dumper;
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/**
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 * Prefix tree of routes preserving routes order.
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 *
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 * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
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 *
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 * @internal
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 */
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class DumperPrefixCollection extends DumperCollection
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{
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    /**
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     * @var string
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     */
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    private $prefix = '';
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    /**
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     * Returns the prefix.
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     *
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     * @return string The prefix
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     */
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    public function getPrefix()
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    {
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        return $this->prefix;
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    }
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    /**
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     * Sets the prefix.
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     *
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     * @param string $prefix The prefix
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     */
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    public function setPrefix($prefix)
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    {
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        $this->prefix = $prefix;
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    }
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    /**
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     * Adds a route in the tree.
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     *
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     * @param DumperRoute $route The route
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     *
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     * @return DumperPrefixCollection The node the route was added to
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     *
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     * @throws \LogicException
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     */
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    public function addPrefixRoute(DumperRoute $route)
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    {
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        $prefix = $route->getRoute()->compile()->getStaticPrefix();
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        for ($collection = $this; null !== $collection; $collection = $collection->getParent()) {
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            // Same prefix, add to current leave
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            if ($collection->prefix === $prefix) {
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                $collection->add($route);
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                return $collection;
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            }
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            // Prefix starts with route's prefix
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            if ('' === $collection->prefix || 0 === strpos($prefix, $collection->prefix)) {
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                $child = new self();
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                $child->setPrefix(substr($prefix, 0, strlen($collection->prefix) + 1));
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                $collection->add($child);
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                return $child->addPrefixRoute($route);
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            }
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        }
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        // Reached only if the root has a non empty prefix
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        throw new \LogicException('The collection root must not have a prefix');
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    }
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    /**
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     * Merges nodes whose prefix ends with a slash.
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     *
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     * Children of a node whose prefix ends with a slash are moved to the parent node
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     */
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    public function mergeSlashNodes()
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    {
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        $children = array();
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        foreach ($this as $child) {
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            if ($child instanceof self) {
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                $child->mergeSlashNodes();
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                if ('/' === substr($child->prefix, -1)) {
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                    $children = array_merge($children, $child->all());
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                } else {
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                    $children[] = $child;
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                }
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            } else {
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                $children[] = $child;
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            }
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        }
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        $this->setAll($children);
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    }
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}