silverstripe-dms/code/forms/JsonField.php

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<?php
/**
* Class JsonField combines form inputs into a key-value pair
*/
class JsonField extends CompositeField
{
public function __construct($name, $children = null)
{
$this->setName($name);
if ($children instanceof FieldList || is_array($children)) {
foreach ($children as $child) {
$this->setChildName($child);
}
} else {
$children = is_array(func_get_args()) ? func_get_args() : array();
if (!empty($children)) {
array_shift($children);
}
foreach ($children as $child) {
$this->setChildName($child);
}
}
parent::__construct($children);
}
/**
* Sets the name of the child object
*
* @param FormField $child
*/
private function setChildName($child)
{
$child->setName("{$this->getName()}[{$child->getName()}]");
}
public function hasData()
{
return true;
}
/**
* Override parent's behaviour as it's no longer required
*
* @param array $list
* @param bool $saveableOnly
*/
public function collateDataFields(&$list, $saveableOnly = false)
{
}
/**
* Recursively removed empty key-value pairs from $haystack
*
* @param $haystack
*
* @return mixed
*/
public function arrayFilterEmptyRecursive($haystack)
{
foreach ($haystack as $key => $value) {
if (is_array($value)) {
$haystack[$key] = $this->arrayFilterEmptyRecursive($haystack[$key]);
}
if (empty($haystack[$key])) {
unset($haystack[$key]);
}
}
return $haystack;
}
/**
* Overrides parent behaviour to remove empty elements
*
* @return mixed|null|string
*/
public function dataValue()
{
$result = null;
if (is_array($this->value)) {
$this->value = $this->arrayFilterEmptyRecursive($this->value);
$result = (!empty($this->value)) ? Convert::array2json($this->value) : $result;
} else {
$result = parent::dataValue();
}
return $result;
}
/**
* Sets
* @param mixed $value
*
* @return $this
*/
public function setValue($value)
{
$this->value = $value;
if (is_string($value) && !empty($value)) {
$value = Convert::json2array($value);
} elseif (!is_array($value)) {
$value = array($value);
}
$pattern = "/^{$this->getName()}\[(.*)\]$/";
foreach ($this->children as $c) {
$title = $c->getName();
preg_match($pattern, $title, $matches);
if (!empty($matches[1]) && isset($value[$matches[1]])) {
$c->setValue($value[$matches[1]]);
}
}
return $this;
}
}