--- /dev/null
+<?php
+
+/*
+ * This file is part of the symfony package.
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require_once(dirname(__FILE__).'/sfYamlInline.php');
+
+/**
+ * sfYamlParser parses YAML strings to convert them to PHP arrays.
+ *
+ * @package symfony
+ * @subpackage yaml
+ * @author Fabien Potencier <fabien.potencier@symfony-project.com>
+ * @version SVN: $Id: sfYamlParser.class.php 10832 2008-08-13 07:46:08Z fabien $
+ */
+class sfYamlParser
+{
+ protected
+ $value = '',
+ $offset = 0,
+ $lines = array(),
+ $currentLineNb = -1,
+ $currentLine = '',
+ $refs = array();
+
+ /**
+ * Constructor
+ *
+ * @param integer $offset The offset of YAML document (used for line numbers in error messages)
+ */
+ public function __construct($offset = 0)
+ {
+ $this->offset = $offset;
+ }
+
+ /**
+ * Parses a YAML string to a PHP value.
+ *
+ * @param string $value A YAML string
+ *
+ * @return mixed A PHP value
+ *
+ * @throws InvalidArgumentException If the YAML is not valid
+ */
+ public function parse($value)
+ {
+ $this->value = $this->cleanup($value);
+ $this->currentLineNb = -1;
+ $this->currentLine = '';
+ $this->lines = explode("\n", $this->value);
+
+ $data = array();
+ while ($this->moveToNextLine())
+ {
+ if ($this->isCurrentLineEmpty())
+ {
+ continue;
+ }
+
+ // tab?
+ if (preg_match('#^\t+#', $this->currentLine))
+ {
+ throw new InvalidArgumentException(sprintf('A YAML file cannot contain tabs as indentation at line %d (%s).', $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+
+ $isRef = $isInPlace = $isProcessed = false;
+ if (preg_match('#^\-(\s+(?P<value>.+?))?\s*$#', $this->currentLine, $values))
+ {
+ if (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#', $values['value'], $matches))
+ {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ // array
+ if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#'))
+ {
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new sfYamlParser($c);
+ $parser->refs =& $this->refs;
+ $data[] = $parser->parse($this->getNextEmbedBlock());
+ }
+ else
+ {
+ if (preg_match('/^([^ ]+)\: +({.*?)$/', $values['value'], $matches))
+ {
+ $data[] = array($matches[1] => sfYamlInline::load($matches[2]));
+ }
+ else
+ {
+ $data[] = $this->parseValue($values['value']);
+ }
+ }
+ }
+ else if (preg_match('#^(?P<key>[^ ].*?) *\:(\s+(?P<value>.+?))?\s*$#', $this->currentLine, $values))
+ {
+ $key = sfYamlInline::parseScalar($values['key']);
+
+ if ('<<' === $key)
+ {
+ if (isset($values['value']) && '*' === substr($values['value'], 0, 1))
+ {
+ $isInPlace = substr($values['value'], 1);
+ if (!array_key_exists($isInPlace, $this->refs))
+ {
+ throw new InvalidArgumentException(sprintf('Reference "%s" does not exist at line %s (%s).', $isInPlace, $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+ }
+ else
+ {
+ if (isset($values['value']) && $values['value'] !== '')
+ {
+ $value = $values['value'];
+ }
+ else
+ {
+ $value = $this->getNextEmbedBlock();
+ }
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new sfYamlParser($c);
+ $parser->refs =& $this->refs;
+ $parsed = $parser->parse($value);
+
+ $merged = array();
+ if (!is_array($parsed))
+ {
+ throw new InvalidArgumentException(sprintf("YAML merge keys used with a scalar value instead of an array at line %s (%s)", $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+ else if (isset($parsed[0]))
+ {
+ // Numeric array, merge individual elements
+ foreach (array_reverse($parsed) as $parsedItem)
+ {
+ if (!is_array($parsedItem))
+ {
+ throw new InvalidArgumentException(sprintf("Merge items must be arrays at line %s (%s).", $this->getRealCurrentLineNb() + 1, $parsedItem));
+ }
+ $merged = array_merge($parsedItem, $merged);
+ }
+ }
+ else
+ {
+ // Associative array, merge
+ $merged = array_merge($merge, $parsed);
+ }
+
+ $isProcessed = $merged;
+ }
+ }
+ else if (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#', $values['value'], $matches))
+ {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ if ($isProcessed)
+ {
+ // Merge keys
+ $data = $isProcessed;
+ }
+ // hash
+ else if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#'))
+ {
+ // if next line is less indented or equal, then it means that the current value is null
+ if ($this->isNextLineIndented())
+ {
+ $data[$key] = null;
+ }
+ else
+ {
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new sfYamlParser($c);
+ $parser->refs =& $this->refs;
+ $data[$key] = $parser->parse($this->getNextEmbedBlock());
+ }
+ }
+ else
+ {
+ if ($isInPlace)
+ {
+ $data = $this->refs[$isInPlace];
+ }
+ else
+ {
+ $data[$key] = $this->parseValue($values['value']);
+ }
+ }
+ }
+ else
+ {
+ // one liner?
+ if (1 == count(explode("\n", rtrim($this->value, "\n"))))
+ {
+ $value = sfYamlInline::load($this->lines[0]);
+ if (is_array($value))
+ {
+ $first = reset($value);
+ if ('*' === substr($first, 0, 1))
+ {
+ $data = array();
+ foreach ($value as $alias)
+ {
+ $data[] = $this->refs[substr($alias, 1)];
+ }
+ $value = $data;
+ }
+ }
+
+ return $value;
+ }
+
+ throw new InvalidArgumentException(sprintf('Unable to parse line %d (%s).', $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+
+ if ($isRef)
+ {
+ $this->refs[$isRef] = end($data);
+ }
+ }
+
+ return empty($data) ? null : $data;
+ }
+
+ /**
+ * Returns the current line number (takes the offset into account).
+ *
+ * @return integer The current line number
+ */
+ protected function getRealCurrentLineNb()
+ {
+ return $this->currentLineNb + $this->offset;
+ }
+
+ /**
+ * Returns the current line indentation.
+ *
+ * @return integer The current line indentation
+ */
+ protected function getCurrentLineIndentation()
+ {
+ return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
+ }
+
+ /**
+ * Returns the next embed block of YAML.
+ *
+ * @return string A YAML string
+ */
+ protected function getNextEmbedBlock()
+ {
+ $this->moveToNextLine();
+
+ $newIndent = $this->getCurrentLineIndentation();
+
+ if (!$this->isCurrentLineEmpty() && 0 == $newIndent)
+ {
+ throw new InvalidArgumentException(sprintf('Indentation problem at line %d (%s)', $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+
+ $data = array(substr($this->currentLine, $newIndent));
+
+ while ($this->moveToNextLine())
+ {
+ if ($this->isCurrentLineEmpty())
+ {
+ if ($this->isCurrentLineBlank())
+ {
+ $data[] = substr($this->currentLine, $newIndent);
+ }
+
+ continue;
+ }
+
+ $indent = $this->getCurrentLineIndentation();
+
+ if (preg_match('#^(?P<text> *)$#', $this->currentLine, $match))
+ {
+ // empty line
+ $data[] = $match['text'];
+ }
+ else if ($indent >= $newIndent)
+ {
+ $data[] = substr($this->currentLine, $newIndent);
+ }
+ else if (0 == $indent)
+ {
+ $this->moveToPreviousLine();
+
+ break;
+ }
+ else
+ {
+ throw new InvalidArgumentException(sprintf('Indentation problem at line %d (%s)', $this->getRealCurrentLineNb() + 1, $this->currentLine));
+ }
+ }
+
+ return implode("\n", $data);
+ }
+
+ /**
+ * Moves the parser to the next line.
+ */
+ protected function moveToNextLine()
+ {
+ if ($this->currentLineNb >= count($this->lines) - 1)
+ {
+ return false;
+ }
+
+ $this->currentLine = $this->lines[++$this->currentLineNb];
+
+ return true;
+ }
+
+ /**
+ * Moves the parser to the previous line.
+ */
+ protected function moveToPreviousLine()
+ {
+ $this->currentLine = $this->lines[--$this->currentLineNb];
+ }
+
+ /**
+ * Parses a YAML value.
+ *
+ * @param string $value A YAML value
+ *
+ * @return mixed A PHP value
+ */
+ protected function parseValue($value)
+ {
+ if ('*' === substr($value, 0, 1))
+ {
+ if (false !== $pos = strpos($value, '#'))
+ {
+ $value = substr($value, 1, $pos - 2);
+ }
+ else
+ {
+ $value = substr($value, 1);
+ }
+
+ if (!array_key_exists($value, $this->refs))
+ {
+ throw new InvalidArgumentException(sprintf('Reference "%s" does not exist (%s).', $value, $this->currentLine));
+ }
+ return $this->refs[$value];
+ }
+
+ if (preg_match('/^(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?$/', $value, $matches))
+ {
+ $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
+
+ return $this->parseFoldedScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), intval(abs($modifiers)));
+ }
+ else
+ {
+ return sfYamlInline::load($value);
+ }
+ }
+
+ /**
+ * Parses a folded scalar.
+ *
+ * @param string $separator The separator that was used to begin this folded scalar (| or >)
+ * @param string $indicator The indicator that was used to begin this folded scalar (+ or -)
+ * @param integer $indentation The indentation that was used to begin this folded scalar
+ *
+ * @return string The text value
+ */
+ protected function parseFoldedScalar($separator, $indicator = '', $indentation = 0)
+ {
+ $separator = '|' == $separator ? "\n" : ' ';
+ $text = '';
+
+ $notEOF = $this->moveToNextLine();
+
+ while ($notEOF && $this->isCurrentLineBlank())
+ {
+ $text .= "\n";
+
+ $notEOF = $this->moveToNextLine();
+ }
+
+ if (!$notEOF)
+ {
+ return '';
+ }
+
+ if (!preg_match('#^(?P<indent>'.($indentation ? str_repeat(' ', $indentation) : ' +').')(?P<text>.*)$#', $this->currentLine, $matches))
+ {
+ $this->moveToPreviousLine();
+
+ return '';
+ }
+
+ $textIndent = $matches['indent'];
+ $previousIndent = 0;
+
+ $text .= $matches['text'].$separator;
+ while ($this->currentLineNb + 1 < count($this->lines))
+ {
+ $this->moveToNextLine();
+
+ if (preg_match('#^(?P<indent> {'.strlen($textIndent).',})(?P<text>.+)$#', $this->currentLine, $matches))
+ {
+ if (' ' == $separator && $previousIndent != $matches['indent'])
+ {
+ $text = substr($text, 0, -1)."\n";
+ }
+ $previousIndent = $matches['indent'];
+
+ $text .= str_repeat(' ', $diff = strlen($matches['indent']) - strlen($textIndent)).$matches['text'].($diff ? "\n" : $separator);
+ }
+ else if (preg_match('#^(?P<text> *)$#', $this->currentLine, $matches))
+ {
+ $text .= preg_replace('#^ {1,'.strlen($textIndent).'}#', '', $matches['text'])."\n";
+ }
+ else
+ {
+ $this->moveToPreviousLine();
+
+ break;
+ }
+ }
+
+ if (' ' == $separator)
+ {
+ // replace last separator by a newline
+ $text = preg_replace('/ (\n*)$/', "\n$1", $text);
+ }
+
+ switch ($indicator)
+ {
+ case '':
+ $text = preg_replace('#\n+$#s', "\n", $text);
+ break;
+ case '+':
+ break;
+ case '-':
+ $text = preg_replace('#\n+$#s', '', $text);
+ break;
+ }
+
+ return $text;
+ }
+
+ /**
+ * Returns true if the next line is indented.
+ *
+ * @return Boolean Returns true if the next line is indented, false otherwise
+ */
+ protected function isNextLineIndented()
+ {
+ $currentIndentation = $this->getCurrentLineIndentation();
+ $notEOF = $this->moveToNextLine();
+
+ while ($notEOF && $this->isCurrentLineEmpty())
+ {
+ $notEOF = $this->moveToNextLine();
+ }
+
+ if (false === $notEOF)
+ {
+ 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
+ */
+ protected function isCurrentLineEmpty()
+ {
+ return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
+ }
+
+ /**
+ * Returns true if the current line is blank.
+ *
+ * @return Boolean Returns true if the current line is blank, false otherwise
+ */
+ protected function isCurrentLineBlank()
+ {
+ return '' == trim($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
+ */
+ protected 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 $value The input YAML string
+ *
+ * @return string A cleaned up YAML string
+ */
+ protected function cleanup($value)
+ {
+ $value = str_replace(array("\r\n", "\r"), "\n", $value);
+
+ if (!preg_match("#\n$#", $value))
+ {
+ $value .= "\n";
+ }
+
+ // strip YAML header
+ preg_replace('#^\%YAML[: ][\d\.]+.*\n#s', '', $value);
+
+ // remove ---
+ $value = preg_replace('#^\-\-\-.*?\n#s', '', $value);
+
+ return $value;
+ }
+}
dépôts / ptitvelo / web / www.git / blobdiff