RuleWeightKeeper.php in Crumbs, the Breadcrumbs suite 7

File

lib/RuleWeightKeeper.php

<?php

class crumbs_RuleWeightKeeper {
  protected $ruleWeights;
  protected $prefixedKeepers = array();
  protected $prefixSorted = array();
  protected $soloSorted = array();
  function __construct(array $rule_weights) {
    asort($rule_weights);
    $this->ruleWeights = $rule_weights;
  }
  function prefixedWeightKeeper($prefix) {
    if (!isset($this->prefixedKeepers[$prefix])) {
      $this->prefixedKeepers[$prefix] = $this
        ->_buildPrefixedWeightKeeper($prefix);
    }
    return $this->prefixedKeepers[$prefix];
  }
  protected function _buildPrefixedWeightKeeper($prefix) {
    $weights = array();
    $k = strlen($prefix);
    $weights[''] = $weights['*'] = $this
      ->_findWildcardWeight($prefix);
    if (isset($this->ruleWeights[$prefix])) {
      $weights[''] = $this->ruleWeights[$prefix];
    }
    if (isset($this->ruleWeights[$prefix . '.*'])) {
      $weights['*'] = $this->ruleWeights[$prefix . '.*'];
    }
    foreach ($this->ruleWeights as $key => $weight) {
      if (strlen($key) > $k && substr($key, 0, $k + 1) === $prefix . '.') {
        $weights[substr($key, $k + 1)] = $weight;
      }
    }
    return new crumbs_RuleWeightKeeper($weights);
  }
  function getSmallestWeight() {
    foreach ($this->ruleWeights as $weight) {
      if ($weight !== FALSE) {
        return $weight;
      }
    }
    return FALSE;
  }

  /**
   * Determine the weight for the rule specified by the key.
   */
  function findWeight($key = NULL) {
    if (!isset($key)) {
      return $this->ruleWeights[''];
    }
    if (isset($this->ruleWeights[$key])) {
      return $this->ruleWeights[$key];
    }
    return $this
      ->_findWildcardWeight($key);
  }
  protected function _findWildcardWeight($key) {
    $fragments = explode('.', $key);
    $partial_key = array_shift($fragments);
    $weight = $this->ruleWeights['*'];
    while (!empty($fragments)) {
      if (isset($this->ruleWeights[$partial_key . '.*'])) {
        $weight = $this->ruleWeights[$partial_key . '.*'];
      }
      $partial_key .= '.' . array_shift($fragments);
    }
    return $weight;
  }

}

Classes

Name	Description
crumbs_RuleWeightKeeper