/**
* Tries to match the beginning of the property path at the
* current position against the children of the scope.
*
* If a matching child is found, it is returned. Otherwise
* null is returned.
*
* @param FormInterface $form The form to search.
* @param PropertyPathIteratorInterface $it The iterator at its current position.
*
* @return null|FormInterface The found match or null.
*/
private function matchChild(FormInterface $form, PropertyPathIteratorInterface $it)
{
// Remember at what property path underneath "data"
// we are looking. Check if there is a child with that
// path, otherwise increase path by one more piece
$chunk = '';
$foundChild = null;
$foundAtIndex = 0;
// Construct mapping rules for the given form
$rules = array();
foreach ($form->getConfig()->getOption('error_mapping') as $propertyPath => $targetPath) {
// Dot rules are considered at the very end
if ('.' !== $propertyPath) {
$rules[] = new MappingRule($form, $propertyPath, $targetPath);
}
}
// Ignore virtual forms when iterating the children
$childIterator = new \RecursiveIteratorIterator(new VirtualFormAwareIterator($form->all()));
// Make the path longer until we find a matching child
while (true) {
if (!$it->valid()) {
return null;
}
if ($it->isIndex()) {
$chunk .= '[' . $it->current() . ']';
} else {
$chunk .= ('' === $chunk ? '' : '.') . $it->current();
}
// Test mapping rules as long as we have any
foreach ($rules as $key => $rule) {
/* @var MappingRule $rule */
// Mapping rule matches completely, terminate.
if (null !== ($form = $rule->match($chunk))) {
return $form;
}
// Keep only rules that have $chunk as prefix
if (!$rule->isPrefix($chunk)) {
unset($rules[$key]);
}
}
// Test children unless we already found one
if (null === $foundChild) {
foreach ($childIterator as $child) {
/* @var FormInterface $child */
$childPath = (string) $child->getPropertyPath();
// Child found, mark as return value
if ($chunk === $childPath) {
$foundChild = $child;
$foundAtIndex = $it->key();
}
}
}
// Add element to the chunk
$it->next();
// If we reached the end of the path or if there are no
// more matching mapping rules, return the found child
if (null !== $foundChild && (!$it->valid() || count($rules) === 0)) {
// Reset index in case we tried to find mapping
// rules further down the path
$it->seek($foundAtIndex);
return $foundChild;
}
}
return null;
}
/**
* Tries to match the beginning of the property path at the
* current position against the children of the scope.
*
* If a matching child is found, it is returned. Otherwise
* null is returned.
*
* @param PropertyPathIteratorInterface $it The iterator at its current position.
*
* @return null|FormInterface The found match or null.
*/
private function matchChild(PropertyPathIteratorInterface $it)
{
// Remember at what property path underneath "data"
// we are looking. Check if there is a child with that
// path, otherwise increase path by one more piece
$chunk = '';
$foundChild = null;
$foundAtIndex = 0;
// Make the path longer until we find a matching child
while (true) {
if (!$it->valid()) {
return null;
}
if ($it->isIndex()) {
$chunk .= '[' . $it->current() . ']';
} else {
$chunk .= ('' === $chunk ? '' : '.') . $it->current();
}
// Test mapping rules as long as we have any
foreach ($this->rules as $key => $rule) {
/* @var MappingRule $rule */
// Mapping rule matches completely, terminate.
if (null !== ($form = $rule->match($chunk))) {
return $form;
}
// Keep only rules that have $chunk as prefix
if (!$rule->isPrefix($chunk)) {
unset($this->rules[$key]);
}
}
// Test children unless we already found one
if (null === $foundChild) {
foreach ($this->children as $child) {
/* @var FormInterface $child */
$childPath = (string) $child->getPropertyPath();
// Child found, move scope inwards
if ($chunk === $childPath) {
$foundChild = $child;
$foundAtIndex = $it->key();
}
}
}
// Add element to the chunk
$it->next();
// If we reached the end of the path or if there are no
// more matching mapping rules, return the found child
if (null !== $foundChild && (!$it->valid() || count($this->rules) === 0)) {
// Reset index in case we tried to find mapping
// rules further down the path
$it->seek($foundAtIndex);
return $foundChild;
}
}
return null;
}