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<?php
/* ===========================================================================
* Copyright 2020 Zindex Software
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============================================================================ */
namespace Opis\JsonSchema\Pragmas;
use Opis\JsonSchema\{Helper, ValidationContext, Pragma};
class CastPragma implements Pragma
{
protected string $cast;
/** @var callable */
protected $func;
/**
* @param string $cast
*/
public function __construct(string $cast)
{
$this->cast = $cast;
$this->func = $this->getCastFunction($cast);
}
/**
* @inheritDoc
*/
public function enter(ValidationContext $context)
{
$currentType = $context->currentDataType();
if ($currentType !== null && Helper::jsonTypeMatches($currentType, $this->cast)) {
// Cast not needed
return $this;
}
unset($currentType);
$currentData = $context->currentData();
$context->setCurrentData(($this->func)($currentData));
return $currentData;
}
/**
* @inheritDoc
*/
public function leave(ValidationContext $context, $data): void
{
if ($data !== $this) {
$context->setCurrentData($data);
}
}
/**
* @param string $type
* @return callable
*/
protected function getCastFunction(string $type): callable
{
$f = 'toNull';
switch ($type) {
case 'integer':
$f = 'toInteger';
break;
case 'number':
$f = 'toNumber';
break;
case 'string':
$f = 'toString';
break;
case 'array':
$f = 'toArray';
break;
case 'object':
$f = 'toObject';
break;
case 'boolean':
$f = 'toBoolean';
break;
}
return [$this, $f];
}
/**
* @param $value
* @return int|null
*/
public function toInteger($value): ?int
{
if ($value === null) {
return 0;
}
return is_scalar($value) ? intval($value) : null;
}
/**
* @param $value
* @return float|null
*/
public function toNumber($value): ?float
{
if ($value === null) {
return 0.0;
}
return is_scalar($value) ? floatval($value) : null;
}
/**
* @param $value
* @return string|null
*/
public function toString($value): ?string
{
if ($value === null) {
return '';
}
if (is_scalar($value)) {
return (string) $value;
}
return null;
}
/**
* @param $value
* @return array|null
*/
public function toArray($value): ?array
{
if ($value === null) {
return [];
}
if (is_scalar($value)) {
return [$value];
}
if (is_array($value)) {
return array_values($value);
}
if (is_object($value)) {
return array_values(get_object_vars($value));
}
return null;
}
/**
* @param $value
* @return object|null
*/
public function toObject($value): ?object
{
if (is_object($value) || is_array($value)) {
return (object) $value;
}
return null;
}
/**
* @param $value
* @return bool
*/
public function toBoolean($value): bool
{
if ($value === null) {
return false;
}
if (is_string($value)) {
return !($value === '');
}
if (is_object($value)) {
return count(get_object_vars($value)) > 0;
}
return boolval($value);
}
}
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