/**
* Compiles a while-loop into PHTML.
*
* Notice that if it has no children, we assume it's a do/while loop
* and don't print brackets
*
* @param Node $node the while-node to compile
*
* @return string The compiled PHTML
*/
protected function compileWhile(Node $node)
{
$subject = $node->subject;
if ($this->isVariable($subject)) {
$subject = "isset({$subject}) ? {$subject} : null";
}
$hasChildren = count($node->children) > 0;
$isDoWhile = $node->prev() && $node->prev()->type === 'do';
if (!$hasChildren && !$isDoWhile) {
$this->throwException('A while-loop without children you loop through is not valid if' . ' there\'s no do-statement before it.', $node);
} else {
if ($isDoWhile && $hasChildren) {
$this->throwException('In a do-while statement the while-part shouldn\'t have any children', $node);
}
}
$phtml = $this->createCode("while ({$subject})" . ($hasChildren ? ' {' : ''), $isDoWhile ? ' ' : '<?php ') . $this->newLine();
if ($hasChildren) {
$phtml .= $this->compileChildren($node->children) . $this->newLine();
$phtml .= $this->indent() . $this->createCode('}') . $this->newLine();
}
return $phtml;
}
/**
* Compiles a conditional, either if, elseif, else if or else into PHTML.
*
* @param Node $node the conditional node to compile
*
* @return string The compiled PHTML
*/
protected function compileConditional(Node $node)
{
$type = $node->conditionType;
$subject = $node->subject;
if ($subject === 'block') {
$subject = '$__block';
}
if ($this->isVariable($subject)) {
$subject = "isset({$subject}) ? {$subject} : false";
}
if ($type === 'unless') {
$type = 'if';
$subject = "!({$subject})";
}
$isPrevConditional = $node->prev() && $node->prev()->type === 'conditional';
$isNextConditional = $node->next() && $node->next()->type === 'conditional' && $node->next()->conditionType !== 'if';
$prefix = $isPrevConditional ? '' : '<?php ';
$suffix = $isNextConditional ? '' : '?>';
$phtml = $type === 'else' ? $this->createCode(' else {', $prefix) : $this->createCode("{$type} ({$subject}) {", $prefix);
$phtml .= $this->compileChildren($node->children);
$phtml .= $this->newLine() . $this->indent() . $this->createCode("}", '<?php ', $suffix);
return $phtml;
}