Viewing file:  flatted.php (4.5 KB) -rw-r--r--
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<?php
/*!
* ISC License
*
* Copyright (c) 2018-2021, Andrea Giammarchi, @WebReflection
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
class FlattedString {
public $value = '';
public function __construct($value) {
$this->value = $value;
}
}
class Flatted {
// public utilities
public static function parse($json, $assoc = false, $depth = 512, $options = 0) {
$input = array_map(
'Flatted::asString',
array_map(
'Flatted::wrap',
json_decode($json, $assoc, $depth, $options)
)
);
$value = &$input[0];
$set = array();
$set[] = &$value;
if (is_array($value))
return Flatted::loop(false, array_keys($value), $input, $set, $value);
if (is_object($value))
return Flatted::loop(true, Flatted::keys($value), $input, $set, $value);
return $value;
}
public static function stringify($value, $options = 0, $depth = 512) {
$known = new stdClass;
$known->key = array();
$known->value = array();
$input = array();
$output = array();
$i = intval(Flatted::index($known, $input, $value));
while ($i < count($input)) {
$output[$i] = Flatted::transform($known, $input, $input[$i]);
$i++;
}
return json_encode($output, $options, $depth);
}
// private helpers
private static function asString($value) {
return $value instanceof FlattedString ? $value->value : $value;
}
private static function index(&$known, &$input, &$value) {
$input[] = &$value;
$index = strval(count($input) - 1);
$known->key[] = &$value;
$known->value[] = &$index;
return $index;
}
private static function keys(&$value) {
$obj = new ReflectionObject($value);
$props = $obj->getProperties();
$keys = array();
foreach ($props as $prop)
$keys[] = $prop->getName();
return $keys;
}
private static function loop($obj, $keys, &$input, &$set, &$output) {
foreach ($keys as $key) {
$value = $obj ? $output->$key : $output[$key];
if ($value instanceof FlattedString)
Flatted::ref($obj, $key, $input[$value->value], $input, $set, $output);
}
return $output;
}
private static function relate(&$known, &$input, &$value) {
if (is_string($value) || is_array($value) || is_object($value)) {
$key = array_search($value, $known->key, true);
if ($key !== false)
return $known->value[$key];
return Flatted::index($known, $input, $value);
}
return $value;
}
private static function ref($obj, &$key, &$value, &$input, &$set, &$output) {
if (is_array($value) && !in_array($value, $set, true)) {
$set[] = $value;
$value = Flatted::loop(false, array_keys($value), $input, $set, $value);
}
elseif (is_object($value) && !in_array($value, $set, true)) {
$set[] = $value;
$value = Flatted::loop(true, Flatted::keys($value), $input, $set, $value);
}
if ($obj) {
$output->$key = &$value;
}
else {
$output[$key] = &$value;
}
}
private static function transform(&$known, &$input, &$value) {
if (is_array($value)) {
return array_map(
function ($value) use(&$known, &$input) {
return Flatted::relate($known, $input, $value);
},
$value
);
}
if (is_object($value)) {
$object = new stdClass;
$keys = Flatted::keys($value);
foreach ($keys as $key)
$object->$key = Flatted::relate($known, $input, $value->$key);
return $object;
}
return $value;
}
private static function wrap($value) {
if (is_string($value)) {
return new FlattedString($value);
}
if (is_array($value)) {
return array_map('Flatted::wrap', $value);
}
if (is_object($value)) {
$keys = Flatted::keys($value);
foreach ($keys as $key) {
$value->$key = self::wrap($value->$key);
}
}
return $value;
}
}
?>
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