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<?php
namespace Illuminate\Support;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Contracts\Support\Jsonable;
use JsonSerializable;
class Js implements Htmlable
{
/**
* The JavaScript string.
*
* @var string
*/
protected $js;
/**
* Flags that should be used when encoding to JSON.
*
* @var int
*/
protected const REQUIRED_FLAGS = JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT | JSON_THROW_ON_ERROR;
/**
* Create a new class instance.
*
* @param mixed $data
* @param int|null $flags
* @param int $depth
* @return void
*
* @throws \JsonException
*/
public function __construct($data, $flags = 0, $depth = 512)
{
$this->js = $this->convertDataToJavaScriptExpression($data, $flags, $depth);
}
/**
* Create a new JavaScript string from the given data.
*
* @param mixed $data
* @param int $flags
* @param int $depth
* @return static
*
* @throws \JsonException
*/
public static function from($data, $flags = 0, $depth = 512)
{
return new static($data, $flags, $depth);
}
/**
* Convert the given data to a JavaScript expression.
*
* @param mixed $data
* @param int $flags
* @param int $depth
* @return string
*
* @throws \JsonException
*/
protected function convertDataToJavaScriptExpression($data, $flags = 0, $depth = 512)
{
if ($data instanceof self) {
return $data->toHtml();
}
$json = $this->jsonEncode($data, $flags, $depth);
if (is_string($data)) {
return "'".substr($json, 1, -1)."'";
}
return $this->convertJsonToJavaScriptExpression($json, $flags);
}
/**
* Encode the given data as JSON.
*
* @param mixed $data
* @param int $flags
* @param int $depth
* @return string
*
* @throws \JsonException
*/
protected function jsonEncode($data, $flags = 0, $depth = 512)
{
if ($data instanceof Jsonable) {
return $data->toJson($flags | static::REQUIRED_FLAGS);
}
if ($data instanceof Arrayable && ! ($data instanceof JsonSerializable)) {
$data = $data->toArray();
}
return json_encode($data, $flags | static::REQUIRED_FLAGS, $depth);
}
/**
* Convert the given JSON to a JavaScript expression.
*
* @param string $json
* @param int $flags
* @return string
*
* @throws \JsonException
*/
protected function convertJsonToJavaScriptExpression($json, $flags = 0)
{
if ('[]' === $json || '{}' === $json) {
return $json;
}
if (Str::startsWith($json, ['"', '{', '['])) {
return "JSON.parse('".substr(json_encode($json, $flags | static::REQUIRED_FLAGS), 1, -1)."')";
}
return $json;
}
/**
* Get the string representation of the data for use in HTML.
*
* @return string
*/
public function toHtml()
{
return $this->js;
}
/**
* Get the string representation of the data for use in HTML.
*
* @return string
*/
public function __toString()
{
return $this->toHtml();
}
}