spyc.php

来自「QeePHP v2.1.2116 bulid 090120」· PHP 代码 · 共 742 行 · 第 1/2 页

<?php
/**
   * Spyc -- A Simple PHP YAML Class
   * @version 0.3
   * @author Chris Wanstrath <[e-mail]>
   * @author Vlad Andersen <[e-mail]>
   * @link http://spyc.sourceforge.net/
   * @copyright Copyright 2005-2006 Chris Wanstrath
   * @license http://www.opensource.org/licenses/mit-license.php MIT License
   * @package Spyc
   */
/**
   * The Simple PHP YAML Class.
   *
   * This class can be used to read a YAML file and convert its contents
   * into a PHP array.  It currently supports a very limited subsection of
   * the YAML spec.
   *
   * Usage:
   * <code>
   *   $parser = new Spyc;
   *   $array  = $parser->load($file);
   * </code>
   * @package Spyc
   */
class Spyc {

  /**#@+
  * @access private
  * @var mixed
  */
  private $_haveRefs;
  private $_allNodes;
  private $_allParent;
  private $_lastIndent;
  private $_lastNode;
  private $_inBlock;
  private $_isInline;
  private $_dumpIndent;
  private $_dumpWordWrap;
  private $_containsGroupAnchor = false;
  private $_containsGroupAlias = false;
  private $path;
  private $result;
  private $LiteralBlockMarkers = array ('>', '|');
  private $LiteralPlaceHolder = '___YAML_Literal_Block___';
  private $SavedGroups = array();

  /**#@+
  * @access public
  * @var mixed
  */
  public $_nodeId;

  /**
     * Load YAML into a PHP array statically
     *
     * The load method, when supplied with a YAML stream (string or file),
     * will do its best to convert YAML in a file into a PHP array.  Pretty
     * simple.
     *  Usage:
     *  <code>
     *   $array = Spyc::YAMLLoad('lucky.yaml');
     *   print_r($array);
     *  </code>
     * @access public
     * @return array
     * @param string $input Path of YAML file or string containing YAML
     */
  public static function YAMLLoad($input) {
    $Spyc = new Spyc;
    return $Spyc->load($input);
  }

  /**
     * Dump YAML from PHP array statically
     *
     * The dump method, when supplied with an array, will do its best
     * to convert the array into friendly YAML.  Pretty simple.  Feel free to
     * save the returned string as nothing.yaml and pass it around.
     *
     * Oh, and you can decide how big the indent is and what the wordwrap
     * for folding is.  Pretty cool -- just pass in 'false' for either if
     * you want to use the default.
     *
     * Indent's default is 2 spaces, wordwrap's default is 40 characters.  And
     * you can turn off wordwrap by passing in 0.
     *
     * @access public
     * @return string
     * @param array $array PHP array
     * @param int $indent Pass in false to use the default, which is 2
     * @param int $wordwrap Pass in 0 for no wordwrap, false for default (40)
     */
  public static function YAMLDump($array,$indent = false,$wordwrap = false) {
    $spyc = new Spyc;
    return $spyc->dump($array,$indent,$wordwrap);
  }


  /**
     * Dump PHP array to YAML
     *
     * The dump method, when supplied with an array, will do its best
     * to convert the array into friendly YAML.  Pretty simple.  Feel free to
     * save the returned string as tasteful.yaml and pass it around.
     *
     * Oh, and you can decide how big the indent is and what the wordwrap
     * for folding is.  Pretty cool -- just pass in 'false' for either if
     * you want to use the default.
     *
     * Indent's default is 2 spaces, wordwrap's default is 40 characters.  And
     * you can turn off wordwrap by passing in 0.
     *
     * @access public
     * @return string
     * @param array $array PHP array
     * @param int $indent Pass in false to use the default, which is 2
     * @param int $wordwrap Pass in 0 for no wordwrap, false for default (40)
     */
  public function dump($array,$indent = false,$wordwrap = false) {
    // Dumps to some very clean YAML.  We'll have to add some more features
    // and options soon.  And better support for folding.

    // New features and options.
    if ($indent === false or !is_numeric($indent)) {
      $this->_dumpIndent = 2;
    } else {
      $this->_dumpIndent = $indent;
    }

    if ($wordwrap === false or !is_numeric($wordwrap)) {
      $this->_dumpWordWrap = 40;
    } else {
      $this->_dumpWordWrap = $wordwrap;
    }

    // New YAML document
    $string = "---\n";

    // Start at the base of the array and move through it.
    foreach ($array as $key => $value) {
      $string .= $this->_yamlize($key,$value,0);
    }
    return $string;
  }

  /**
     * Attempts to convert a key / value array item to YAML
     * @access private
     * @return string
     * @param $key The name of the key
     * @param $value The value of the item
     * @param $indent The indent of the current node
     */
  private function _yamlize($key,$value,$indent) {
    if (is_array($value)) {
      // It has children.  What to do?
      // Make it the right kind of item
      $string = $this->_dumpNode($key,NULL,$indent);
      // Add the indent
      $indent += $this->_dumpIndent;
      // Yamlize the array
      $string .= $this->_yamlizeArray($value,$indent);
    } elseif (!is_array($value)) {
      // It doesn't have children.  Yip.
      $string = $this->_dumpNode($key,$value,$indent);
    }
    return $string;
  }

  /**
     * Attempts to convert an array to YAML
     * @access private
     * @return string
     * @param $array The array you want to convert
     * @param $indent The indent of the current level
     */
  private function _yamlizeArray($array,$indent) {
    if (is_array($array)) {
      $string = '';
      foreach ($array as $key => $value) {
        $string .= $this->_yamlize($key,$value,$indent);
      }
      return $string;
    } else {
      return false;
    }
  }

  /**
     * Returns YAML from a key and a value
     * @access private
     * @return string
     * @param $key The name of the key
     * @param $value The value of the item
     * @param $indent The indent of the current node
     */
  private function _dumpNode($key,$value,$indent) {
    // do some folding here, for blocks
    if (strpos($value,"\n") !== false || strpos($value,": ") !== false || strpos($value,"- ") !== false) {
      $value = $this->_doLiteralBlock($value,$indent);
    } else {
      $value  = $this->_doFolding($value,$indent);
    }

    if (is_bool($value)) {
      $value = ($value) ? "true" : "false";
    }

    $spaces = str_repeat(' ',$indent);

    if (is_int($key)) {
      // It's a sequence
      $string = $spaces.'- '.$value."\n";
    } else {
      // It's mapped
      $string = $spaces.$key.': '.$value."\n";
    }
    return $string;
  }

  /**
     * Creates a literal block for dumping
     * @access private
     * @return string
     * @param $value
     * @param $indent int The value of the indent
     */
  private function _doLiteralBlock($value,$indent) {
    $exploded = explode("\n",$value);
    $newValue = '|';
    $indent  += $this->_dumpIndent;
    $spaces   = str_repeat(' ',$indent);
    foreach ($exploded as $line) {
      $newValue .= "\n" . $spaces . trim($line);
    }
    return $newValue;
  }

  /**
     * Folds a string of text, if necessary
     * @access private
     * @return string
     * @param $value The string you wish to fold
     */
  private function _doFolding($value,$indent) {
    // Don't do anything if wordwrap is set to 0
    if ($this->_dumpWordWrap === 0) {
      return $value;
    }

    if (strlen($value) > $this->_dumpWordWrap) {
      $indent += $this->_dumpIndent;
      $indent = str_repeat(' ',$indent);
      $wrapped = wordwrap($value,$this->_dumpWordWrap,"\n$indent");
      $value   = ">\n".$indent.$wrapped;
    }
    return $value;
  }

/* LOADING FUNCTIONS */

  private function load($input) {
    $Source = $this->loadFromSource($input);
    if (empty ($Source)) return array();
    $this->path = array();
    $this->result = array();


    for ($i = 0; $i < count($Source); $i++) {
      $line = $Source[$i];
      $lineIndent = $this->_getIndent($line);
      $this->path = $this->getParentPathByIndent($lineIndent);
      $line = $this->stripIndent($line, $lineIndent);
      if ($this->isComment($line)) continue;

      if ($literalBlockStyle = $this->startsLiteralBlock($line)) {
        $line = rtrim ($line, $literalBlockStyle . "\n");
        $literalBlock = '';
        $line .= $this->LiteralPlaceHolder;

        while ($this->literalBlockContinues($Source[++$i], $lineIndent)) {
          $literalBlock = $this->addLiteralLine($literalBlock, $Source[$i], $literalBlockStyle);
        }
        $i--;
      }
      $lineArray = $this->_parseLine($line);
      if ($literalBlockStyle)
      $lineArray = $this->revertLiteralPlaceHolder ($lineArray, $literalBlock);

      $this->addArray($lineArray, $lineIndent);
    }
    return $this->result;
  }

  private function loadFromSource ($input) {
    if (!empty($input) && strpos($input, "\n") === false && file_exists($input))
    return file($input);

    $foo = explode("\n",$input);
    foreach ($foo as $k => $_) {
      $foo[$k] = trim ($_, "\r");
    }
    return $foo;
  }

  /**
     * Finds and returns the indentation of a YAML line
     * @access private
     * @return int
     * @param string $line A line from the YAML file
     */
  private function _getIndent($line) {
    if (!preg_match('/^ +/',$line,$match)) return 0;
    if (!empty($match[0])) return strlen ($match[0]);
    return 0;
  }

  /**
     * Parses YAML code and returns an array for a node
     * @access private
     * @return array
     * @param string $line A line from the YAML file
     */
  private function _parseLine($line) {
    if (!$line) return array();
    $line = trim($line);
    if (!$line) return array();
    $array = array();

    if ($group = $this->nodeContainsGroup($line)) {
      $this->addGroup($line, $group);
      $line = $this->stripGroup ($line, $group);
    }

    if ($this->startsMappedSequence($line))
      return $this->returnMappedSequence($line);

    if ($this->startsMappedValue($line))
      return $this->returnMappedValue($line);

    if ($this->isArrayElement($line))
     return $this->returnArrayElement($line);

    return $this->returnKeyValuePair($line);

  }



  /**
     * Finds the type of the passed value, returns the value as the new type.
     * @access private
     * @param string $value
     * @return mixed
     */
  private function _toType($value) {

   if (strpos($value, '#') !== false)
     $value = trim(preg_replace('/#(.+)$/','',$value));


    if (preg_match('/^("(.*)"|\'(.*)\')/',$value,$matches)) {
      $value = (string)preg_replace('/(\'\'|\\\\\')/',"'",end($matches));
      $value = preg_replace('/\\\\"/','"',$value);
    } elseif (preg_match('/^\\[(.+)\\]$/',$value,$matches)) {
      // Inline Sequence

      // Take out strings sequences and mappings
      $explode = $this->_inlineEscape($matches[1]);