File "PrototypedArrayNode.php"
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Config\Definition;
use Symfony\Component\Config\Definition\Exception\DuplicateKeyException;
use Symfony\Component\Config\Definition\Exception\Exception;
use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
use Symfony\Component\Config\Definition\Exception\UnsetKeyException;
/**
* Represents a prototyped Array node in the config tree.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class PrototypedArrayNode extends ArrayNode
{
protected $prototype;
protected $keyAttribute;
protected $removeKeyAttribute = false;
protected $minNumberOfElements = 0;
protected $defaultValue = [];
protected $defaultChildren;
/**
* @var NodeInterface[] An array of the prototypes of the simplified value children
*/
private $valuePrototypes = [];
/**
* Sets the minimum number of elements that a prototype based node must
* contain. By default this is zero, meaning no elements.
*/
public function setMinNumberOfElements(int $number)
{
$this->minNumberOfElements = $number;
}
/**
* Sets the attribute which value is to be used as key.
*
* This is useful when you have an indexed array that should be an
* associative array. You can select an item from within the array
* to be the key of the particular item. For example, if "id" is the
* "key", then:
*
* [
* ['id' => 'my_name', 'foo' => 'bar'],
* ];
*
* becomes
*
* [
* 'my_name' => ['foo' => 'bar'],
* ];
*
* If you'd like "'id' => 'my_name'" to still be present in the resulting
* array, then you can set the second argument of this method to false.
*
* @param string $attribute The name of the attribute which value is to be used as a key
* @param bool $remove Whether or not to remove the key
*/
public function setKeyAttribute(string $attribute, bool $remove = true)
{
$this->keyAttribute = $attribute;
$this->removeKeyAttribute = $remove;
}
/**
* Retrieves the name of the attribute which value should be used as key.
*
* @return string|null
*/
public function getKeyAttribute()
{
return $this->keyAttribute;
}
/**
* Sets the default value of this node.
*/
public function setDefaultValue(array $value)
{
$this->defaultValue = $value;
}
/**
* {@inheritdoc}
*/
public function hasDefaultValue()
{
return true;
}
/**
* Adds default children when none are set.
*
* @param int|string|array|null $children The number of children|The child name|The children names to be added
*/
public function setAddChildrenIfNoneSet($children = ['defaults'])
{
if (null === $children) {
$this->defaultChildren = ['defaults'];
} else {
$this->defaultChildren = \is_int($children) && $children > 0 ? range(1, $children) : (array) $children;
}
}
/**
* {@inheritdoc}
*
* The default value could be either explicited or derived from the prototype
* default value.
*/
public function getDefaultValue()
{
if (null !== $this->defaultChildren) {
$default = $this->prototype->hasDefaultValue() ? $this->prototype->getDefaultValue() : [];
$defaults = [];
foreach (array_values($this->defaultChildren) as $i => $name) {
$defaults[null === $this->keyAttribute ? $i : $name] = $default;
}
return $defaults;
}
return $this->defaultValue;
}
/**
* Sets the node prototype.
*/
public function setPrototype(PrototypeNodeInterface $node)
{
$this->prototype = $node;
}
/**
* Retrieves the prototype.
*
* @return PrototypeNodeInterface
*/
public function getPrototype()
{
return $this->prototype;
}
/**
* Disable adding concrete children for prototyped nodes.
*
* @throws Exception
*/
public function addChild(NodeInterface $node)
{
throw new Exception('A prototyped array node cannot have concrete children.');
}
/**
* {@inheritdoc}
*/
protected function finalizeValue($value)
{
if (false === $value) {
throw new UnsetKeyException(sprintf('Unsetting key for path "%s", value: %s.', $this->getPath(), json_encode($value)));
}
foreach ($value as $k => $v) {
$prototype = $this->getPrototypeForChild($k);
try {
$value[$k] = $prototype->finalize($v);
} catch (UnsetKeyException $e) {
unset($value[$k]);
}
}
if (\count($value) < $this->minNumberOfElements) {
$ex = new InvalidConfigurationException(sprintf('The path "%s" should have at least %d element(s) defined.', $this->getPath(), $this->minNumberOfElements));
$ex->setPath($this->getPath());
throw $ex;
}
return $value;
}
/**
* {@inheritdoc}
*
* @throws DuplicateKeyException
*/
protected function normalizeValue($value)
{
if (false === $value) {
return $value;
}
$value = $this->remapXml($value);
$isList = array_is_list($value);
$normalized = [];
foreach ($value as $k => $v) {
if (null !== $this->keyAttribute && \is_array($v)) {
if (!isset($v[$this->keyAttribute]) && \is_int($k) && $isList) {
$ex = new InvalidConfigurationException(sprintf('The attribute "%s" must be set for path "%s".', $this->keyAttribute, $this->getPath()));
$ex->setPath($this->getPath());
throw $ex;
} elseif (isset($v[$this->keyAttribute])) {
$k = $v[$this->keyAttribute];
if (\is_float($k)) {
$k = var_export($k, true);
}
// remove the key attribute when required
if ($this->removeKeyAttribute) {
unset($v[$this->keyAttribute]);
}
// if only "value" is left
if (array_keys($v) === ['value']) {
$v = $v['value'];
if ($this->prototype instanceof ArrayNode && ($children = $this->prototype->getChildren()) && \array_key_exists('value', $children)) {
$valuePrototype = current($this->valuePrototypes) ?: clone $children['value'];
$valuePrototype->parent = $this;
$originalClosures = $this->prototype->normalizationClosures;
if (\is_array($originalClosures)) {
$valuePrototypeClosures = $valuePrototype->normalizationClosures;
$valuePrototype->normalizationClosures = \is_array($valuePrototypeClosures) ? array_merge($originalClosures, $valuePrototypeClosures) : $originalClosures;
}
$this->valuePrototypes[$k] = $valuePrototype;
}
}
}
if (\array_key_exists($k, $normalized)) {
$ex = new DuplicateKeyException(sprintf('Duplicate key "%s" for path "%s".', $k, $this->getPath()));
$ex->setPath($this->getPath());
throw $ex;
}
}
$prototype = $this->getPrototypeForChild($k);
if (null !== $this->keyAttribute || !$isList) {
$normalized[$k] = $prototype->normalize($v);
} else {
$normalized[] = $prototype->normalize($v);
}
}
return $normalized;
}
/**
* {@inheritdoc}
*/
protected function mergeValues($leftSide, $rightSide)
{
if (false === $rightSide) {
// if this is still false after the last config has been merged the
// finalization pass will take care of removing this key entirely
return false;
}
if (false === $leftSide || !$this->performDeepMerging) {
return $rightSide;
}
$isList = array_is_list($rightSide);
foreach ($rightSide as $k => $v) {
// prototype, and key is irrelevant there are no named keys, append the element
if (null === $this->keyAttribute && $isList) {
$leftSide[] = $v;
continue;
}
// no conflict
if (!\array_key_exists($k, $leftSide)) {
if (!$this->allowNewKeys) {
$ex = new InvalidConfigurationException(sprintf('You are not allowed to define new elements for path "%s". Please define all elements for this path in one config file.', $this->getPath()));
$ex->setPath($this->getPath());
throw $ex;
}
$leftSide[$k] = $v;
continue;
}
$prototype = $this->getPrototypeForChild($k);
$leftSide[$k] = $prototype->merge($leftSide[$k], $v);
}
return $leftSide;
}
/**
* Returns a prototype for the child node that is associated to $key in the value array.
* For general child nodes, this will be $this->prototype.
* But if $this->removeKeyAttribute is true and there are only two keys in the child node:
* one is same as this->keyAttribute and the other is 'value', then the prototype will be different.
*
* For example, assume $this->keyAttribute is 'name' and the value array is as follows:
*
* [
* [
* 'name' => 'name001',
* 'value' => 'value001'
* ]
* ]
*
* Now, the key is 0 and the child node is:
*
* [
* 'name' => 'name001',
* 'value' => 'value001'
* ]
*
* When normalizing the value array, the 'name' element will removed from the child node
* and its value becomes the new key of the child node:
*
* [
* 'name001' => ['value' => 'value001']
* ]
*
* Now only 'value' element is left in the child node which can be further simplified into a string:
*
* ['name001' => 'value001']
*
* Now, the key becomes 'name001' and the child node becomes 'value001' and
* the prototype of child node 'name001' should be a ScalarNode instead of an ArrayNode instance.
*
* @return mixed
*/
private function getPrototypeForChild(string $key)
{
$prototype = $this->valuePrototypes[$key] ?? $this->prototype;
$prototype->setName($key);
return $prototype;
}
}