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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\Yaml;
use Symfony\Component\Yaml\Tag\TaggedValue;
/**
* Dumper dumps PHP variables to YAML strings.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @final
*/
class Dumper
{
/**
* The amount of spaces to use for indentation of nested nodes.
*/
private int $indentation;
public function __construct(int $indentation = 4)
{
if ($indentation < 1) {
throw new \InvalidArgumentException('The indentation must be greater than zero.');
}
$this->indentation = $indentation;
}
/**
* Dumps a PHP value to YAML.
*
* @param mixed $input The PHP value
* @param int $inline The level where you switch to inline YAML
* @param int $indent The level of indentation (used internally)
* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
*/
public function dump(mixed $input, int $inline = 0, int $indent = 0, int $flags = 0): string
{
$output = '';
$prefix = $indent ? str_repeat(' ', $indent) : '';
$dumpObjectAsInlineMap = true;
if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($input instanceof \ArrayObject || $input instanceof \stdClass)) {
$dumpObjectAsInlineMap = empty((array) $input);
}
if ($inline <= 0 || (!\is_array($input) && !$input instanceof TaggedValue && $dumpObjectAsInlineMap) || empty($input)) {
$output .= $prefix.Inline::dump($input, $flags);
} elseif ($input instanceof TaggedValue) {
$output .= $this->dumpTaggedValue($input, $inline, $indent, $flags, $prefix);
} else {
$dumpAsMap = Inline::isHash($input);
foreach ($input as $key => $value) {
if ('' !== $output && "\n" !== $output[-1]) {
$output .= "\n";
}
if (\is_int($key) && Yaml::DUMP_NUMERIC_KEY_AS_STRING & $flags) {
$key = (string) $key;
}
if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value) && str_contains($value, "\n") && !str_contains($value, "\r")) {
$blockIndentationIndicator = $this->getBlockIndentationIndicator($value);
if (isset($value[-2]) && "\n" === $value[-2] && "\n" === $value[-1]) {
$blockChompingIndicator = '+';
} elseif ("\n" === $value[-1]) {
$blockChompingIndicator = '';
} else {
$blockChompingIndicator = '-';
}
$output .= sprintf('%s%s%s |%s%s', $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', '', $blockIndentationIndicator, $blockChompingIndicator);
foreach (explode("\n", $value) as $row) {
if ('' === $row) {
$output .= "\n";
} else {
$output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
}
}
continue;
}
if ($value instanceof TaggedValue) {
$output .= sprintf('%s%s !%s', $prefix, $dumpAsMap ? Inline::dump($key, $flags).':' : '-', $value->getTag());
if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value->getValue()) && str_contains($value->getValue(), "\n") && !str_contains($value->getValue(), "\r\n")) {
$blockIndentationIndicator = $this->getBlockIndentationIndicator($value->getValue());
$output .= sprintf(' |%s', $blockIndentationIndicator);
foreach (explode("\n", $value->getValue()) as $row) {
$output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
}
continue;
}
if ($inline - 1 <= 0 || null === $value->getValue() || \is_scalar($value->getValue())) {
$output .= ' '.$this->dump($value->getValue(), $inline - 1, 0, $flags)."\n";
} else {
$output .= "\n";
$output .= $this->dump($value->getValue(), $inline - 1, $dumpAsMap ? $indent + $this->indentation : $indent + 2, $flags);
}
continue;
}
$dumpObjectAsInlineMap = true;
if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \ArrayObject || $value instanceof \stdClass)) {
$dumpObjectAsInlineMap = empty((array) $value);
}
$willBeInlined = $inline - 1 <= 0 || !\is_array($value) && $dumpObjectAsInlineMap || empty($value);
$output .= sprintf('%s%s%s%s',
$prefix,
$dumpAsMap ? Inline::dump($key, $flags).':' : '-',
$willBeInlined ? ' ' : "\n",
$this->dump($value, $inline - 1, $willBeInlined ? 0 : $indent + $this->indentation, $flags)
).($willBeInlined ? "\n" : '');
}
}
return $output;
}
private function dumpTaggedValue(TaggedValue $value, int $inline, int $indent, int $flags, string $prefix): string
{
$output = sprintf('%s!%s', $prefix ? $prefix.' ' : '', $value->getTag());
if (Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK & $flags && \is_string($value->getValue()) && str_contains($value->getValue(), "\n") && !str_contains($value->getValue(), "\r\n")) {
$blockIndentationIndicator = $this->getBlockIndentationIndicator($value->getValue());
$output .= sprintf(' |%s', $blockIndentationIndicator);
foreach (explode("\n", $value->getValue()) as $row) {
$output .= sprintf("\n%s%s%s", $prefix, str_repeat(' ', $this->indentation), $row);
}
return $output;
}
if ($inline - 1 <= 0 || null === $value->getValue() || \is_scalar($value->getValue())) {
return $output.' '.$this->dump($value->getValue(), $inline - 1, 0, $flags)."\n";
}
return $output."\n".$this->dump($value->getValue(), $inline - 1, $indent, $flags);
}
private function getBlockIndentationIndicator(string $value): string
{
$lines = explode("\n", $value);
// If the first line (that is neither empty nor contains only spaces)
// starts with a space character, the spec requires a block indentation indicator
// http://www.yaml.org/spec/1.2/spec.html#id2793979
foreach ($lines as $line) {
if ('' !== trim($line, ' ')) {
return (' ' === substr($line, 0, 1)) ? (string) $this->indentation : '';
}
}
return '';
}
}
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