protected function checkTTL($ttl)
{
$statements = array();
if ($ttl !== null) {
// Create the if statement that checks whether the cache file exists.
$if = new ezcTemplateIfAstNode();
$if->conditions[] = $cb = new ezcTemplateConditionBodyAstNode();
$time = new ezcTemplateFunctionCallAstNode("time", array());
$time->checkAndSetTypeHint();
$cb->condition = new ezcTemplateLogicalAndOperatorAstNode(new ezcTemplateFunctionCallAstNode("file_exists", array(new ezcTemplateVariableAstNode("_ezcTemplateCache" . $this->cacheLevel))), new ezcTemplateLessThanOperatorAstNode(new ezcTemplateAdditionOperatorAstNode(new ezcTemplateFunctionCallAstNode("filemtime", array(new ezcTemplateVariableAstNode("_ezcTemplateCache" . $this->cacheLevel))), new ezcTemplateParenthesisAstNode($ttl)), $time));
$cb->body = new ezcTemplateBodyAstNode();
$cb->body->statements = array();
$cb->body->statements[] = new ezcTemplateGenericStatementAstNode(new ezcTemplateFunctionCallAstNode("unlink", array(new ezcTemplateVariableAstNode("_ezcTemplateCache" . $this->cacheLevel))));
$statements[] = $if;
}
return $statements;
}
/**
* Returns the corresponding AST tree to the function name $functionName and its parameters.
*
* The function name will, most likely, be translated from a Template function name to
* the PHP function. The parameters are ordered, if needed.
*
* @param string $functionName
* @param array(ezcTemplateAstNode) $parameters
* @throws ezcTemplateException if the parameters are not valid (Too many, not enough parameters, etc).
* @return ezcTemplateAstNode
*/
public function getAstTree($functionName, $parameters)
{
// Try the built-in template functions.
$class = $this->getClass($functionName);
if ($class !== null) {
$f = call_user_func(array($class, "getFunctionSubstitution"), $functionName, $parameters);
if ($f !== null) {
return $this->createAstNodes($functionName, $f, $parameters);
}
}
// Try the custom template functions.
$def = $this->getCustomFunction($functionName);
if ($def !== false) {
$reflectionParameters = $this->getReflectionParameters($def);
$a = new ezcTemplateFunctionCallAstNode(($def->class ? $def->class . "::" : "") . $def->method);
$a->checkAndSetTypeHint();
if (isset($def->sendTemplateObject) && $def->sendTemplateObject) {
array_shift($reflectionParameters);
$a->appendParameter(new ezcTemplateVariableAstNode("this->template"));
}
$this->checkDefinition($def, $reflectionParameters);
$this->checkGivenParameters($def, $reflectionParameters, $parameters, $functionName);
$parameters = $this->orderParameters($reflectionParameters, $parameters, $functionName);
foreach ($parameters as $p) {
$a->appendParameter($p);
}
return $a;
}
throw new ezcTemplateException(sprintf(ezcTemplateSourceToTstErrorMessages::MSG_UNKNOWN_FUNCTION, $functionName));
}