NestedMatcher.php in Zircon Profile 8

Namespace

Symfony\Cmf\Component\Routing\NestedMatcher

File

vendor/symfony-cmf/routing/NestedMatcher/NestedMatcher.php

<?php

/*
 * This file is part of the Symfony CMF package.
 *
 * (c) 2011-2014 Symfony CMF
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Cmf\Component\Routing\NestedMatcher;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
use Symfony\Cmf\Component\Routing\RouteProviderInterface;

/**
 * A more flexible approach to matching. The route collection to match against
 * can be dynamically determined based on the request and users can inject
 * their own filters or use a custom final matching strategy.
 *
 * The nested matcher splits matching into three configurable steps:
 *
 * 1) Get potential matches from a RouteProviderInterface
 * 2) Apply any RouteFilterInterface to reduce the route collection
 * 3) Have FinalMatcherInterface select the best match of the remaining routes
 *
 * @author Larry Garfield
 * @author David Buchmann
 */
class NestedMatcher implements RequestMatcherInterface {

  /**
   * The route provider responsible for the first-pass match.
   *
   * @var RouteProviderInterface
   */
  protected $routeProvider;

  /**
   * The final matcher.
   *
   * @var FinalMatcherInterface
   */
  protected $finalMatcher;

  /**
   * An array of RouteFilterInterface objects.
   *
   * @var RouteFilterInterface[]
   */
  protected $filters = array();

  /**
   * Array of RouteFilterInterface objects, sorted.
   *
   * @var RouteFilterInterface[]
   */
  protected $sortedFilters = array();

  /**
   * Constructs a new NestedMatcher
   *
   * @param RouteProviderInterface $provider The route provider this matcher
   *                                         should use
   * @param FinalMatcherInterface  $final    The Final Matcher to match the
   *                                         routes
   */
  public function __construct(RouteProviderInterface $provider = null, FinalMatcherInterface $final = null) {
    if (null !== $provider) {
      $this
        ->setRouteProvider($provider);
    }
    if (null !== $final) {
      $this
        ->setFinalMatcher($final);
    }
  }

  /**
   * Sets the route provider for the matching plan.
   *
   * @param RouteProviderInterface $provider A source of routes.
   *
   * @return NestedMatcher this object to have a fluent interface
   */
  public function setRouteProvider(RouteProviderInterface $provider) {
    $this->routeProvider = $provider;
    return $this;
  }

  /**
   * Adds a partial matcher to the matching plan.
   *
   * Partial matchers will be run in the order in which they are added.
   *
   * @param RouteFilterInterface $filter
   * @param int                  $priority (optional) The priority of the
   *                                       filter. Higher number filters will
   *                                       be used first. Defaults to 0.
   *
   * @return NestedMatcher this object to have a fluent interface
   */
  public function addRouteFilter(RouteFilterInterface $filter, $priority = 0) {
    if (empty($this->filters[$priority])) {
      $this->filters[$priority] = array();
    }
    $this->filters[$priority][] = $filter;
    $this->sortedFilters = array();
    return $this;
  }

  /**
   * Sets the final matcher for the matching plan.
   *
   * @param FinalMatcherInterface $final The final matcher that will have to
   *                                     pick the route that will be used.
   *
   * @return NestedMatcher this object to have a fluent interface
   */
  public function setFinalMatcher(FinalMatcherInterface $final) {
    $this->finalMatcher = $final;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function matchRequest(Request $request) {
    $collection = $this->routeProvider
      ->getRouteCollectionForRequest($request);
    if (!count($collection)) {
      throw new ResourceNotFoundException();
    }

    // Route filters are expected to throw an exception themselves if they
    // end up filtering the list down to 0.
    foreach ($this
      ->getRouteFilters() as $filter) {
      $collection = $filter
        ->filter($collection, $request);
    }
    $attributes = $this->finalMatcher
      ->finalMatch($collection, $request);
    return $attributes;
  }

  /**
   * Sorts the filters and flattens them.
   *
   * @return RouteFilterInterface[] the filters ordered by priority
   */
  public function getRouteFilters() {
    if (empty($this->sortedFilters)) {
      $this->sortedFilters = $this
        ->sortFilters();
    }
    return $this->sortedFilters;
  }

  /**
   * Sort filters by priority.
   *
   * The highest priority number is the highest priority (reverse sorting).
   *
   * @return RouteFilterInterface[] the sorted filters
   */
  protected function sortFilters() {
    $sortedFilters = array();
    krsort($this->filters);
    foreach ($this->filters as $filters) {
      $sortedFilters = array_merge($sortedFilters, $filters);
    }
    return $sortedFilters;
  }

}

Classes

Name	Description
NestedMatcher	A more flexible approach to matching. The route collection to match against can be dynamically determined based on the request and users can inject their own filters or use a custom final matching strategy.