<?php
/**
* Spyc -- A Simple PHP YAML Class
* @version 0.2.(5) -- 2006-12-31
* @author Chris Wanstrath <chris@ozmm.org>
* @author Vlad Andersen <vlad@oneiros.ru>
* @link http://spyc.sourceforge.net/
* @copyright Copyright 2005-2006 Chris Wanstrath
* @license http://www.opensource.org/licenses/mit-license.php MIT License
* @package sapphire
* @subpackage misc
*/
/**
* A node, used by Spyc for parsing YAML.
* @package sapphire
* @subpackage misc
*/
class YAMLNode {
/**#@+
* @access public
* @var string
*/
public $parent;
public $id;
/**#@-*/
/**
* @access public
* @var mixed
*/
public $data;
/**
* @access public
* @var int
*/
public $indent;
/**
* @access public
* @var bool
*/
public $children = false;
/**
* The constructor assigns the node a unique ID.
* @access public
* @return void
*/
public function YAMLNode($nodeId) {
$this->id = $nodeId;
}
}
/**
* 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 sapphire
* @subpackage misc
*/
class Spyc {
/**
* 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);
}
/**
* Load YAML into a PHP array from an instantiated object
*
* The load method, when supplied with a YAML stream (string or file path),
* will do its best to convert the YAML into a PHP array. Pretty simple.
* Usage:
* <code>
* $parser = new Spyc;
* $array = $parser->load('lucky.yaml');
* print_r($array);
* </code>
* @access public
* @return array
* @param string $input Path of YAML file or string containing YAML
*/
public function load($input) {
// See what type of input we're talking about
// If it's not a file, assume it's a string
if (!empty($input) && (strpos($input, "\n") === false)
&& file_exists($input)) {
$yaml = file($input);
} else {
$yaml = explode("\n",$input);
}
// Initiate some objects and values
$base = new YAMLNode (1);
$base->indent = 0;
$this->_lastIndent = 0;
$this->_lastNode = $base->id;
$this->_inBlock = false;
$this->_isInline = false;
$this->_nodeId = 2;
foreach ($yaml as $linenum => $line) {
$ifchk = trim($line);
// If the line starts with a tab (instead of a space), throw a fit.
if (preg_match('/^(\t)+(\w+)/', $line)) {
$err = 'ERROR: Line '. ($linenum + 1) .' in your input YAML begins'.
' with a tab. YAML only recognizes spaces. Please reformat.';
die($err);
}
if ($this->_inBlock === false && empty($ifchk)) {
continue;
} elseif ($this->_inBlock == true && empty($ifchk)) {
$last =& $this->_allNodes[$this->_lastNode];
$last->data[key($last->data)] .= "\n";
} elseif ($ifchk{0} != '#' && substr($ifchk,0,3) != '---') {
// Create a new node and get its indent
$node = new YAMLNode ($this->_nodeId);
$this->_nodeId++;
$node->indent = $this->_getIndent($line);
// Check where the node lies in the hierarchy
if ($this->_lastIndent == $node->indent) {
// If we're in a block, add the text to the parent's data
if ($this->_inBlock === true) {
$parent =& $this->_allNodes[$this->_lastNode];
$parent->data[key($parent->data)] .= trim($line).$this->_blockEnd;
} else {
// The current node's parent is the same as the previous node's
if (isset($this->_allNodes[$this->_lastNode])) {
$node->parent = $this->_allNodes[$this->_lastNode]->parent;
}
}
} elseif ($this->_lastIndent < $node->indent) {
if ($this->_inBlock === true) {
$parent =& $this->_allNodes[$this->_lastNode];
$parent->data[key($parent->data)] .= trim($line).$this->_blockEnd;
} elseif ($this->_inBlock === false) {
// The current node's parent is the previous node
$node->parent = $this->_lastNode;
// If the value of the last node's data was > or | we need to
// start blocking i.e. taking in all lines as a text value until
// we drop our indent.
$parent =& $this->_allNodes[$node->parent];
$this->_allNodes[$node->parent]->children = true;
if (is_array($parent->data)) {
// if (isset ($parent->data[key($parent->data)]))
$chk = $parent->data[key($parent->data)];
if ($chk === '>') {
$this->_inBlock = true;
$this->_blockEnd = ' ';
$parent->data[key($parent->data)] =
str_replace('>','',$parent->data[key($parent->data)]);
$parent->data[key($parent->data)] .= trim($line).' ';
$this->_allNodes[$node->parent]->children = false;
$this->_lastIndent = $node->indent;
} elseif ($chk === '|') {
$this->_inBlock = true;
$this->_blockEnd = "\n";
$parent->data[key($parent->data)] =
str_replace('|','',$parent->data[key($parent->data)]);
$parent->data[key($parent->data)] .= trim($line)."\n";
$this->_allNodes[$node->parent]->children = false;
$this->_lastIndent = $node->indent;
}
}
}
} elseif ($this->_lastIndent > $node->indent) {
// Any block we had going is dead now
if ($this->_inBlock === true) {
$this->_inBlock = false;
if ($this->_blockEnd = "\n") {
$last =& $this->_allNodes[$this->_lastNode];
$last->data[key($last->data)] =
trim($last->data[key($last->data)]);
}
}
// We don't know the parent of the node so we have to find it
// foreach ($this->_allNodes as $n) {
foreach ($this->_indentSort[$node->indent] as $n) {
if ($n->indent == $node->indent) {
$node->parent = $n->parent;
}
}
}
if ($this->_inBlock === false) {
// Set these properties with information from our current node
$this->_lastIndent = $node->indent;
// Set the last node
$this->_lastNode = $node->id;
// Parse the YAML line and return its data
$node->data = $this->_parseLine($line);
// Add the node to the master list
$this->_allNodes[$node->id] = $node;
// Add a reference to the parent list
$this->_allParent[intval($node->parent)][] = $node->id;
// Add a reference to the node in an indent array
$this->_indentSort[$node->indent][] =& $this->_allNodes[$node->id];
// Add a reference to the node in a References array if this node
// has a YAML reference in it.
if (
( (is_array($node->data)) &&
isset($node->data[key($node->data)]) &&
(!is_array($node->data[key($node->data)])) )
&&
( (preg_match('/^&([^ ]+)/',$node->data[key($node->data)]))
||
(preg_match('/^\*([^ ]+)/',$node->data[key($node->data)])) )
) {
$this->_haveRefs[] =& $this->_allNodes[$node->id];
} elseif (
( (is_array($node->data)) &&
isset($node->data[key($node->data)]) &&
(is_array($node->data[key($node->data)])) )
) {
// Incomplete reference making code. Ugly, needs cleaned up.
foreach ($node->data[key($node->data)] as $d) {
if ( !is_array($d) &&
( (preg_match('/^&([^ ]+)/',$d))
||
(preg_match('/^\*([^ ]+)/',$d)) )
) {
$this->_haveRefs[] =& $this->_allNodes[$node->id];
}
}
}
}
}
}
unset($node);
// Here we travel through node-space and pick out references (& and *)
$this->_linkReferences();
// Build the PHP array out of node-space
$trunk = $this->_buildArray();
return $trunk;
}
/**
* 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;
}
/**** Private Properties ****/
/**#@+
* @access private
* @var mixed
*/
private $_haveRefs;
private $_allNodes;
private $_allParent;
private $_lastIndent;
private $_lastNode;
private $_inBlock;
private $_isInline;
private $_dumpIndent;
private $_dumpWordWrap;
/**#@-*/
/**** Public Properties ****/
/**#@+
* @access public
* @var mixed
*/
public $_nodeId;
/**#@-*/
/**** Private Methods ****/
/**
* 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;
}
/* Methods used in loading */
/**
* 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) {
preg_match('/^\s{1,}/',$line,$match);
if (!empty($match[0])) {
$indent = substr_count($match[0],' ');
} else {
$indent = 0;
}
return $indent;
}
/**
* 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) {
$line = trim($line);
$array = array();
if (preg_match('/^-(.*):$/',$line)) {
// It's a mapped sequence
$key = trim(substr(substr($line,1),0,-1));
$array[$key] = '';
} elseif ($line[0] == '-' && substr($line,0,3) != '---') {
// It's a list item but not a new stream
if (strlen($line) > 1) {
$value = trim(substr($line,1));
// Set the type of the value. Int, string, etc
$value = $this->_toType($value);
$array[] = $value;
} else {
$array[] = array();
}
} elseif (preg_match('/^(.+):/',$line,$key)) {
// It's a key/value pair most likely
// If the key is in double quotes pull it out
if (preg_match('/^(["\'](.*)["\'](\s)*:)/',$line,$matches)) {
$value = trim(str_replace($matches[1],'',$line));
$key = $matches[2];
} else {
// Do some guesswork as to the key and the value
$explode = explode(':',$line);
$key = trim($explode[0]);
array_shift($explode);
$value = trim(implode(':',$explode));
}
// Set the type of the value. Int, string, etc
$value = $this->_toType($value);
if (empty($key)) {
$array[] = $value;
} else {
$array[$key] = $value;
}
}
return $array;
}
/**
* 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 (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]);
// Propogate value array
$value = array();
foreach ($explode as $v) {
$value[] = $this->_toType($v);
}
} elseif (strpos($value,': ')!==false && !preg_match('/^{(.+)/',$value)) {
// It's a map
$array = explode(': ',$value);
$key = trim($array[0]);
array_shift($array);
$value = trim(implode(': ',$array));
$value = $this->_toType($value);
$value = array($key => $value);
} elseif (preg_match("/{(.+)}$/",$value,$matches)) {
// Inline Mapping
// Take out strings sequences and mappings
$explode = $this->_inlineEscape($matches[1]);
// Propogate value array
$array = array();
foreach ($explode as $v) {
$array = $array + $this->_toType($v);
}
$value = $array;
} elseif (strtolower($value) == 'null' or $value == '' or $value == '~') {
$value = NULL;
} elseif (preg_match ('/^[0-9]+$/', $value)) {
$value = (int)$value;
} elseif (in_array(strtolower($value),
array('true', 'on', '+', 'yes', 'y'))) {
$value = TRUE;
} elseif (in_array(strtolower($value),
array('false', 'off', '-', 'no', 'n'))) {
$value = FALSE;
} elseif (is_numeric($value)) {
$value = (float)$value;
} else {
// Just a normal string, right?
$value = trim(preg_replace('/#(.+)$/','',$value));
}
return $value;
}
/**
* Used in inlines to check for more inlines or quoted strings
* @access private
* @return array
*/
private function _inlineEscape($inline) {
// There's gotta be a cleaner way to do this...
// While pure sequences seem to be nesting just fine,
// pure mappings and mappings with sequences inside can't go very
// deep. This needs to be fixed.
$saved_strings = array();
// Check for strings
$regex = '/(?:(")|(?:\'))((?(1)[^"]+|[^\']+))(?(1)"|\')/';
if (preg_match_all($regex,$inline,$strings)) {
$saved_strings = $strings[0];
$inline = preg_replace($regex,'YAMLString',$inline);
}
unset($regex);
// Check for sequences
if (preg_match_all('/\[(.+)\]/U',$inline,$seqs)) {
$inline = preg_replace('/\[(.+)\]/U','YAMLSeq',$inline);
$seqs = $seqs[0];
}
// Check for mappings
if (preg_match_all('/{(.+)}/U',$inline,$maps)) {
$inline = preg_replace('/{(.+)}/U','YAMLMap',$inline);
$maps = $maps[0];
}
$explode = explode(', ',$inline);
// Re-add the sequences
if (!empty($seqs)) {
$i = 0;
foreach ($explode as $key => $value) {
if (strpos($value,'YAMLSeq') !== false) {
$explode[$key] = str_replace('YAMLSeq',$seqs[$i],$value);
++$i;
}
}
}
// Re-add the mappings
if (!empty($maps)) {
$i = 0;
foreach ($explode as $key => $value) {
if (strpos($value,'YAMLMap') !== false) {
$explode[$key] = str_replace('YAMLMap',$maps[$i],$value);
++$i;
}
}
}
// Re-add the strings
if (!empty($saved_strings)) {
$i = 0;
foreach ($explode as $key => $value) {
while (strpos($value,'YAMLString') !== false) {
$explode[$key] = preg_replace('/YAMLString/',$saved_strings[$i],$value, 1);
++$i;
$value = $explode[$key];
}
}
}
return $explode;
}
/**
* Builds the PHP array from all the YAML nodes we've gathered
* @access private
* @return array
*/
private function _buildArray() {
$trunk = array();
if (!isset($this->_indentSort[0])) {
return $trunk;
}
foreach ($this->_indentSort[0] as $n) {
if (empty($n->parent)) {
$this->_nodeArrayizeData($n);
// Check for references and copy the needed data to complete them.
$this->_makeReferences($n);
// Merge our data with the big array we're building
$trunk = $this->_array_kmerge($trunk,$n->data);
}
}
return $trunk;
}
/**
* Traverses node-space and sets references (& and *) accordingly
* @access private
* @return bool
*/
private function _linkReferences() {
if (is_array($this->_haveRefs)) {
foreach ($this->_haveRefs as $node) {
if (!empty($node->data)) {
$key = key($node->data);
// If it's an array, don't check.
if (is_array($node->data[$key])) {
foreach ($node->data[$key] as $k => $v) {
$this->_linkRef($node,$key,$k,$v);
}
} else {
$this->_linkRef($node,$key);
}
}
}
}
return true;
}
function _linkRef(&$n,$key,$k = NULL,$v = NULL) {
if (empty($k) && empty($v)) {
// Look for &refs
if (preg_match('/^&([^ ]+)/',$n->data[$key],$matches)) {
// Flag the node so we know it's a reference
$this->_allNodes[$n->id]->ref = substr($matches[0],1);
$this->_allNodes[$n->id]->data[$key] =
substr($n->data[$key],strlen($matches[0])+1);
// Look for *refs
} elseif (preg_match('/^\*([^ ]+)/',$n->data[$key],$matches)) {
$ref = substr($matches[0],1);
// Flag the node as having a reference
$this->_allNodes[$n->id]->refKey = $ref;
}
} elseif (!empty($k) && !empty($v)) {
if (preg_match('/^&([^ ]+)/',$v,$matches)) {
// Flag the node so we know it's a reference
$this->_allNodes[$n->id]->ref = substr($matches[0],1);
$this->_allNodes[$n->id]->data[$key][$k] =
substr($v,strlen($matches[0])+1);
// Look for *refs
} elseif (preg_match('/^\*([^ ]+)/',$v,$matches)) {
$ref = substr($matches[0],1);
// Flag the node as having a reference
$this->_allNodes[$n->id]->refKey = $ref;
}
}
}
/**
* Finds the children of a node and aids in the building of the PHP array
* @access private
* @param int $nid The id of the node whose children we're gathering
* @return array
*/
private function _gatherChildren($nid) {
$return = array();
$node =& $this->_allNodes[$nid];
if (is_array ($this->_allParent[$node->id])) {
foreach ($this->_allParent[$node->id] as $nodeZ) {
$z =& $this->_allNodes[$nodeZ];
// We found a child
$this->_nodeArrayizeData($z);
// Check for references
$this->_makeReferences($z);
// Merge with the big array we're returning
// The big array being all the data of the children of our parent node
$return = $this->_array_kmerge($return,$z->data);
}
}
return $return;
}
/**
* Turns a node's data and its children's data into a PHP array
*
* @access private
* @param array $node The node which you want to arrayize
* @return boolean
*/
private function _nodeArrayizeData(&$node) {
if (is_array($node->data) && $node->children == true) {
// This node has children, so we need to find them
$childs = $this->_gatherChildren($node->id);
// We've gathered all our children's data and are ready to use it
$key = key($node->data);
$key = empty($key) ? 0 : $key;
// If it's an array, add to it of course
if (isset ($node->data[$key])) {
if (is_array($node->data[$key])) {
$node->data[$key] = $this->_array_kmerge($node->data[$key],$childs);
} else {
$node->data[$key] = $childs;
}
} else {
$node->data[$key] = $childs;
}
} elseif (!is_array($node->data) && $node->children == true) {
// Same as above, find the children of this node
$childs = $this->_gatherChildren($node->id);
$node->data = array();
$node->data[] = $childs;
}
// We edited $node by reference, so just return true
return true;
}
/**
* Traverses node-space and copies references to / from this object.
* @access private
* @param object $z A node whose references we wish to make real
* @return bool
*/
private function _makeReferences(&$z) {
// It is a reference
if (isset($z->ref)) {
$key = key($z->data);
// Copy the data to this object for easy retrieval later
$this->ref[$z->ref] =& $z->data[$key];
// It has a reference
} elseif (isset($z->refKey)) {
if (isset($this->ref[$z->refKey])) {
$key = key($z->data);
// Copy the data from this object to make the node a real reference
$z->data[$key] =& $this->ref[$z->refKey];
}
}
return true;
}
/**
* Merges arrays and maintains numeric keys.
*
* An ever-so-slightly modified version of the array_kmerge() function posted
* to php.net by mail at nospam dot iaindooley dot com on 2004-04-08.
*
* http://us3.php.net/manual/en/function.array-merge.php
*
* @access private
* @param array $arr1
* @param array $arr2
* @return array
*/
private function _array_kmerge($arr1,$arr2) {
if(!is_array($arr1)) $arr1 = array();
if(!is_array($arr2)) $arr2 = array();
$keys = array_merge(array_keys($arr1),array_keys($arr2));
$vals = array_merge(array_values($arr1),array_values($arr2));
$ret = array();
foreach($keys as $key) {
list($unused,$val) = each($vals);
if (isset($ret[$key]) and is_int($key)) $ret[] = $val; else $ret[$key] = $val;
}
return $ret;
}
}
?>