/**
* {@inheritDoc}
*/
public function isEnabled()
{
if (null === $this->rule) {
throw new FeatureException('No Rule has been set');
}
if (null === $this->context) {
$this->context = new Context();
}
return $this->rule->evaluate($this->context);
}
public function testConstructorEvaluationAndExecution()
{
$test = $this;
$context = new Context();
$executed = false;
$actionExecuted = false;
$ruleOne = new Rule(new CallbackProposition(function ($c) use($test, $context, &$executed, &$actionExecuted) {
$test->assertSame($c, $context);
$executed = true;
return false;
}), function () use($test, &$actionExecuted) {
$actionExecuted = true;
});
$this->assertFalse($ruleOne->evaluate($context));
$this->assertTrue($executed);
$ruleOne->execute($context);
$this->assertFalse($actionExecuted);
$executed = false;
$actionExecuted = false;
$ruleTwo = new Rule(new CallbackProposition(function ($c) use($test, $context, &$executed, &$actionExecuted) {
$test->assertSame($c, $context);
$executed = true;
return true;
}), function () use($test, &$actionExecuted) {
$actionExecuted = true;
});
$this->assertTrue($ruleTwo->evaluate($context));
$this->assertTrue($executed);
$ruleTwo->execute($context);
$this->assertTrue($actionExecuted);
}
/**
* evaluateRule
*
* @param RankRule $rule
* @param Context $ctx
* @access private
* @return void
*/
private function evaluateRule(RankRule $rule, Context $ctx)
{
$propositionClass = sprintf("Ruler\\Operator\\%s", ucfirst($rule->getComparator()));
if (!class_exists($propositionClass)) {
throw new \Exception("Class {$propositionClass} does not exist");
}
// If fact is a date, we must convert value to unix timestamp
// to do comparison
if (preg_match('/date/i', $rule->getFact()->getName())) {
$date = new \DateTime($rule->getValue());
$value = $date->getTimestamp();
} else {
$value = $rule->getValue();
}
$proposition = new $propositionClass(new Variable($rule->getFact()->getName()), new Variable('x' . $rule->getFact()->getName(), $value));
// add x value to context
$myRule = new Rule($proposition, function () {
});
if ($myRule->evaluate($ctx)) {
if ($this->debug) {
print "<h2>rule passed!</h2>";
}
return true;
} else {
if ($this->debug) {
print "<h2>rule failed</h2>";
}
return false;
}
}
