public function RulesConditionalCase::canEvaluate in Conditional Rules 8

Same name and namespace in other branches

1. 7 includes/rules_conditional.plugin.inc \RulesConditionalCase::canEvaluate()

Determines whether this branch can be evaluated.

Overrides RulesConditionalElement::canEvaluate

File

includes/rules_conditional.plugin.inc, line 349

Rules plugin implementation.

Class

RulesConditionalCase

Switch case.

Code

public function canEvaluate(RulesState $state) {
  $this
    ->forceSetUp();

  // Check if this element has fallen through.
  if ($previous = $this
    ->getPreviousSibling()) {

    /** @var $previous self */
    if ($previous instanceof self && $previous
      ->fallThrough() && $previous
      ->canEvaluate($state)) {
      return TRUE;
    }
  }

  // Evaluate condition for the given state once.
  $this->conditionResultCache += array(
    'state' => array(),
    'result' => array(),
  );
  if (empty($this->conditionResultCache['state']) || !($cacheKey = array_search($state, $this->conditionResultCache['state'], TRUE))) {
    $cacheKey = count($this->conditionResultCache['state']);
    $this->conditionResultCache['state'][$cacheKey] = $state;
    $this->conditionResultCache['result'][$cacheKey] = $this->condition
      ->evaluate($state);
  }
  return !empty($this->conditionResultCache['result'][$cacheKey]);
}