mirror of
https://github.com/hauke68/Magallanes.git
synced 2025-11-04 00:50:18 +01:00
640 lines
23 KiB
PHP
640 lines
23 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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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\Exception\ParseException;
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/**
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* Parser parses YAML strings to convert them to PHP arrays.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Parser
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{
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const FOLDED_SCALAR_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
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private $offset = 0;
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private $lines = array();
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private $currentLineNb = -1;
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private $currentLine = '';
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private $refs = array();
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/**
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* Constructor
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*
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* @param integer $offset The offset of YAML document (used for line numbers in error messages)
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*/
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public function __construct($offset = 0)
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{
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$this->offset = $offset;
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}
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/**
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* Parses a YAML string to a PHP value.
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*
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* @param string $value A YAML string
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* @param Boolean $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
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* @param Boolean $objectSupport true if object support is enabled, false otherwise
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*
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* @return mixed A PHP value
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*
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* @throws ParseException If the YAML is not valid
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*/
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public function parse($value, $exceptionOnInvalidType = false, $objectSupport = false)
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{
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$this->currentLineNb = -1;
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$this->currentLine = '';
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$this->lines = explode("\n", $this->cleanup($value));
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if (function_exists('mb_detect_encoding') && false === mb_detect_encoding($value, 'UTF-8', true)) {
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throw new ParseException('The YAML value does not appear to be valid UTF-8.');
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}
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if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) {
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$mbEncoding = mb_internal_encoding();
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mb_internal_encoding('UTF-8');
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}
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$data = array();
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$context = null;
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while ($this->moveToNextLine()) {
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if ($this->isCurrentLineEmpty()) {
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continue;
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}
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// tab?
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if ("\t" === $this->currentLine[0]) {
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throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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$isRef = $isInPlace = $isProcessed = false;
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if (preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+?))?\s*$#u', $this->currentLine, $values)) {
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if ($context && 'mapping' == $context) {
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throw new ParseException('You cannot define a sequence item when in a mapping');
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}
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$context = 'sequence';
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if (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
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$isRef = $matches['ref'];
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$values['value'] = $matches['value'];
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}
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// array
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if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
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$c = $this->getRealCurrentLineNb() + 1;
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$parser = new Parser($c);
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$parser->refs =& $this->refs;
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$data[] = $parser->parse($this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport);
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} else {
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if (isset($values['leadspaces'])
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&& ' ' == $values['leadspaces']
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&& preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $values['value'], $matches)
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) {
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// this is a compact notation element, add to next block and parse
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$c = $this->getRealCurrentLineNb();
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$parser = new Parser($c);
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$parser->refs =& $this->refs;
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$block = $values['value'];
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if ($this->isNextLineIndented()) {
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$block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + 2);
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}
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$data[] = $parser->parse($block, $exceptionOnInvalidType, $objectSupport);
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} else {
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$data[] = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport);
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}
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}
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} elseif (preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\[\{].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->currentLine, $values) && false === strpos($values['key'],' #')) {
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if ($context && 'sequence' == $context) {
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throw new ParseException('You cannot define a mapping item when in a sequence');
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}
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$context = 'mapping';
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// force correct settings
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Inline::parse(null, $exceptionOnInvalidType, $objectSupport);
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try {
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$key = Inline::parseScalar($values['key']);
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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if ('<<' === $key) {
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if (isset($values['value']) && 0 === strpos($values['value'], '*')) {
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$isInPlace = substr($values['value'], 1);
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if (!array_key_exists($isInPlace, $this->refs)) {
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throw new ParseException(sprintf('Reference "%s" does not exist.', $isInPlace), $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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} else {
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if (isset($values['value']) && $values['value'] !== '') {
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$value = $values['value'];
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} else {
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$value = $this->getNextEmbedBlock();
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}
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$c = $this->getRealCurrentLineNb() + 1;
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$parser = new Parser($c);
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$parser->refs =& $this->refs;
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$parsed = $parser->parse($value, $exceptionOnInvalidType, $objectSupport);
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$merged = array();
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if (!is_array($parsed)) {
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throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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} elseif (isset($parsed[0])) {
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// Numeric array, merge individual elements
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foreach (array_reverse($parsed) as $parsedItem) {
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if (!is_array($parsedItem)) {
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throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem);
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}
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$merged = array_merge($parsedItem, $merged);
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}
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} else {
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// Associative array, merge
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$merged = array_merge($merged, $parsed);
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}
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$isProcessed = $merged;
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}
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} elseif (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
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$isRef = $matches['ref'];
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$values['value'] = $matches['value'];
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}
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if ($isProcessed) {
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// Merge keys
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$data = $isProcessed;
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// hash
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} elseif (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
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// if next line is less indented or equal, then it means that the current value is null
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if (!$this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
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$data[$key] = null;
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} else {
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$c = $this->getRealCurrentLineNb() + 1;
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$parser = new Parser($c);
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$parser->refs =& $this->refs;
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$data[$key] = $parser->parse($this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport);
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}
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} else {
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if ($isInPlace) {
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$data = $this->refs[$isInPlace];
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} else {
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$data[$key] = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport);
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}
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}
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} else {
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// 1-liner optionally followed by newline
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$lineCount = count($this->lines);
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if (1 === $lineCount || (2 === $lineCount && empty($this->lines[1]))) {
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try {
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$value = Inline::parse($this->lines[0], $exceptionOnInvalidType, $objectSupport);
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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if (is_array($value)) {
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$first = reset($value);
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if (is_string($first) && 0 === strpos($first, '*')) {
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$data = array();
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foreach ($value as $alias) {
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$data[] = $this->refs[substr($alias, 1)];
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}
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$value = $data;
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}
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}
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if (isset($mbEncoding)) {
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mb_internal_encoding($mbEncoding);
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}
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return $value;
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}
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switch (preg_last_error()) {
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case PREG_INTERNAL_ERROR:
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$error = 'Internal PCRE error.';
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break;
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case PREG_BACKTRACK_LIMIT_ERROR:
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$error = 'pcre.backtrack_limit reached.';
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break;
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case PREG_RECURSION_LIMIT_ERROR:
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$error = 'pcre.recursion_limit reached.';
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break;
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case PREG_BAD_UTF8_ERROR:
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$error = 'Malformed UTF-8 data.';
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break;
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case PREG_BAD_UTF8_OFFSET_ERROR:
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$error = 'Offset doesn\'t correspond to the begin of a valid UTF-8 code point.';
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break;
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default:
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$error = 'Unable to parse.';
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}
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throw new ParseException($error, $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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if ($isRef) {
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$this->refs[$isRef] = end($data);
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}
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}
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if (isset($mbEncoding)) {
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mb_internal_encoding($mbEncoding);
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}
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return empty($data) ? null : $data;
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}
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/**
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* Returns the current line number (takes the offset into account).
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*
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* @return integer The current line number
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*/
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private function getRealCurrentLineNb()
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{
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return $this->currentLineNb + $this->offset;
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}
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/**
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* Returns the current line indentation.
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*
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* @return integer The current line indentation
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*/
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private function getCurrentLineIndentation()
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{
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return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
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}
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/**
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* Returns the next embed block of YAML.
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*
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* @param integer $indentation The indent level at which the block is to be read, or null for default
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*
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* @return string A YAML string
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*
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* @throws ParseException When indentation problem are detected
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*/
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private function getNextEmbedBlock($indentation = null)
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{
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$this->moveToNextLine();
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if (null === $indentation) {
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$newIndent = $this->getCurrentLineIndentation();
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$unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem($this->currentLine);
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if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
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throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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} else {
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$newIndent = $indentation;
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}
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$data = array(substr($this->currentLine, $newIndent));
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$isItUnindentedCollection = $this->isStringUnIndentedCollectionItem($this->currentLine);
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// Comments must not be removed inside a string block (ie. after a line ending with "|")
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$removeCommentsPattern = '~'.self::FOLDED_SCALAR_PATTERN.'$~';
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$removeComments = !preg_match($removeCommentsPattern, $this->currentLine);
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while ($this->moveToNextLine()) {
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if ($this->getCurrentLineIndentation() === $newIndent) {
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$removeComments = !preg_match($removeCommentsPattern, $this->currentLine);
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}
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if ($isItUnindentedCollection && !$this->isStringUnIndentedCollectionItem($this->currentLine)) {
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$this->moveToPreviousLine();
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break;
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}
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if ($removeComments && $this->isCurrentLineEmpty() || $this->isCurrentLineBlank()) {
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if ($this->isCurrentLineBlank()) {
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$data[] = substr($this->currentLine, $newIndent);
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}
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continue;
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}
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$indent = $this->getCurrentLineIndentation();
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if (preg_match('#^(?P<text> *)$#', $this->currentLine, $match)) {
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// empty line
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$data[] = $match['text'];
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} elseif ($indent >= $newIndent) {
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$data[] = substr($this->currentLine, $newIndent);
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} elseif (0 == $indent) {
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$this->moveToPreviousLine();
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break;
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} else {
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throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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}
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return implode("\n", $data);
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}
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/**
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* Moves the parser to the next line.
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*
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* @return Boolean
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*/
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private function moveToNextLine()
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{
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if ($this->currentLineNb >= count($this->lines) - 1) {
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return false;
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}
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$this->currentLine = $this->lines[++$this->currentLineNb];
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return true;
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}
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/**
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* Moves the parser to the previous line.
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*/
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private function moveToPreviousLine()
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{
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$this->currentLine = $this->lines[--$this->currentLineNb];
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}
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/**
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* Parses a YAML value.
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*
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* @param string $value A YAML value
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* @param Boolean $exceptionOnInvalidType True if an exception must be thrown on invalid types false otherwise
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* @param Boolean $objectSupport True if object support is enabled, false otherwise
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*
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* @return mixed A PHP value
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*
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* @throws ParseException When reference does not exist
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*/
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private function parseValue($value, $exceptionOnInvalidType, $objectSupport)
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{
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if (0 === strpos($value, '*')) {
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if (false !== $pos = strpos($value, '#')) {
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$value = substr($value, 1, $pos - 2);
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} else {
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$value = substr($value, 1);
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}
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if (!array_key_exists($value, $this->refs)) {
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throw new ParseException(sprintf('Reference "%s" does not exist.', $value), $this->currentLine);
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}
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return $this->refs[$value];
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}
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if (preg_match('/^'.self::FOLDED_SCALAR_PATTERN.'$/', $value, $matches)) {
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$modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
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return $this->parseFoldedScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), intval(abs($modifiers)));
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}
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try {
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return Inline::parse($value, $exceptionOnInvalidType, $objectSupport);
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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}
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/**
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* Parses a folded scalar.
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*
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* @param string $separator The separator that was used to begin this folded scalar (| or >)
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* @param string $indicator The indicator that was used to begin this folded scalar (+ or -)
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* @param integer $indentation The indentation that was used to begin this folded scalar
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*
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* @return string The text value
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*/
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private function parseFoldedScalar($separator, $indicator = '', $indentation = 0)
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{
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$notEOF = $this->moveToNextLine();
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if (!$notEOF) {
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return '';
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}
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$isCurrentLineBlank = $this->isCurrentLineBlank();
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$text = '';
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// leading blank lines are consumed before determining indentation
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while ($notEOF && $isCurrentLineBlank) {
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// newline only if not EOF
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if ($notEOF = $this->moveToNextLine()) {
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$text .= "\n";
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$isCurrentLineBlank = $this->isCurrentLineBlank();
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}
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}
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// determine indentation if not specified
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if (0 === $indentation) {
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if (preg_match('/^ +/', $this->currentLine, $matches)) {
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$indentation = strlen($matches[0]);
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}
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}
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if ($indentation > 0) {
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$pattern = sprintf('/^ {%d}(.*)$/', $indentation);
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while (
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$notEOF && (
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$isCurrentLineBlank ||
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preg_match($pattern, $this->currentLine, $matches)
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)
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) {
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if ($isCurrentLineBlank) {
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$text .= substr($this->currentLine, $indentation);
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} else {
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$text .= $matches[1];
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}
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// newline only if not EOF
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if ($notEOF = $this->moveToNextLine()) {
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$text .= "\n";
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$isCurrentLineBlank = $this->isCurrentLineBlank();
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}
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}
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} elseif ($notEOF) {
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$text .= "\n";
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}
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if ($notEOF) {
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$this->moveToPreviousLine();
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}
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// replace all non-trailing single newlines with spaces in folded blocks
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if ('>' === $separator) {
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preg_match('/(\n*)$/', $text, $matches);
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$text = preg_replace('/(?<!\n)\n(?!\n)/', ' ', rtrim($text, "\n"));
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$text .= $matches[1];
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}
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// deal with trailing newlines as indicated
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if ('' === $indicator) {
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$text = preg_replace('/\n+$/s', "\n", $text);
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} elseif ('-' === $indicator) {
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$text = preg_replace('/\n+$/s', '', $text);
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}
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return $text;
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}
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/**
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* Returns true if the next line is indented.
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*
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* @return Boolean Returns true if the next line is indented, false otherwise
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*/
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private function isNextLineIndented()
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{
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$currentIndentation = $this->getCurrentLineIndentation();
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$EOF = !$this->moveToNextLine();
|
|
|
|
while (!$EOF && $this->isCurrentLineEmpty()) {
|
|
$EOF = !$this->moveToNextLine();
|
|
}
|
|
|
|
if ($EOF) {
|
|
return false;
|
|
}
|
|
|
|
$ret = false;
|
|
if ($this->getCurrentLineIndentation() > $currentIndentation) {
|
|
$ret = true;
|
|
}
|
|
|
|
$this->moveToPreviousLine();
|
|
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the current line is blank or if it is a comment line.
|
|
*
|
|
* @return Boolean Returns true if the current line is empty or if it is a comment line, false otherwise
|
|
*/
|
|
private function isCurrentLineEmpty()
|
|
{
|
|
return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
|
|
}
|
|
|
|
/**
|
|
* Returns true if the current line is blank.
|
|
*
|
|
* @return Boolean Returns true if the current line is blank, false otherwise
|
|
*/
|
|
private function isCurrentLineBlank()
|
|
{
|
|
return '' == trim($this->currentLine, ' ');
|
|
}
|
|
|
|
/**
|
|
* Returns true if the current line is a comment line.
|
|
*
|
|
* @return Boolean Returns true if the current line is a comment line, false otherwise
|
|
*/
|
|
private function isCurrentLineComment()
|
|
{
|
|
//checking explicitly the first char of the trim is faster than loops or strpos
|
|
$ltrimmedLine = ltrim($this->currentLine, ' ');
|
|
|
|
return $ltrimmedLine[0] === '#';
|
|
}
|
|
|
|
/**
|
|
* Cleanups a YAML string to be parsed.
|
|
*
|
|
* @param string $value The input YAML string
|
|
*
|
|
* @return string A cleaned up YAML string
|
|
*/
|
|
private function cleanup($value)
|
|
{
|
|
$value = str_replace(array("\r\n", "\r"), "\n", $value);
|
|
|
|
// strip YAML header
|
|
$count = 0;
|
|
$value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#su', '', $value, -1, $count);
|
|
$this->offset += $count;
|
|
|
|
// remove leading comments
|
|
$trimmedValue = preg_replace('#^(\#.*?\n)+#s', '', $value, -1, $count);
|
|
if ($count == 1) {
|
|
// items have been removed, update the offset
|
|
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
|
|
$value = $trimmedValue;
|
|
}
|
|
|
|
// remove start of the document marker (---)
|
|
$trimmedValue = preg_replace('#^\-\-\-.*?\n#s', '', $value, -1, $count);
|
|
if ($count == 1) {
|
|
// items have been removed, update the offset
|
|
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
|
|
$value = $trimmedValue;
|
|
|
|
// remove end of the document marker (...)
|
|
$value = preg_replace('#\.\.\.\s*$#s', '', $value);
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the next line starts unindented collection
|
|
*
|
|
* @return Boolean Returns true if the next line starts unindented collection, false otherwise
|
|
*/
|
|
private function isNextLineUnIndentedCollection()
|
|
{
|
|
$currentIndentation = $this->getCurrentLineIndentation();
|
|
$notEOF = $this->moveToNextLine();
|
|
|
|
while ($notEOF && $this->isCurrentLineEmpty()) {
|
|
$notEOF = $this->moveToNextLine();
|
|
}
|
|
|
|
if (false === $notEOF) {
|
|
return false;
|
|
}
|
|
|
|
$ret = false;
|
|
if (
|
|
$this->getCurrentLineIndentation() == $currentIndentation
|
|
&&
|
|
$this->isStringUnIndentedCollectionItem($this->currentLine)
|
|
) {
|
|
$ret = true;
|
|
}
|
|
|
|
$this->moveToPreviousLine();
|
|
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the string is un-indented collection item
|
|
*
|
|
* @return Boolean Returns true if the string is un-indented collection item, false otherwise
|
|
*/
|
|
private function isStringUnIndentedCollectionItem()
|
|
{
|
|
return (0 === strpos($this->currentLine, '- '));
|
|
}
|
|
|
|
}
|