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