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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Json
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * Zend_Json_Expr.
  *
  * @see Zend_Json_Expr
  */
 // require_once 'Zend/Json/Expr.php';
 
 /** @see Zend_Xml_Security */
 // require_once 'Zend/Xml/Security.php';
 
 /**
  * Class for encoding to and decoding from JSON.
  *
  * @category   Zend
  * @package    Zend_Json
  * @uses       Zend_Json_Expr
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Json
 {
     /**
      * How objects should be encoded -- arrays or as StdClass. TYPE_ARRAY is 1
      * so that it is a boolean true value, allowing it to be used with
      * ext/json's functions.
      */
     const TYPE_ARRAY  = 1;
     const TYPE_OBJECT = 0;
 
      /**
       * To check the allowed nesting depth of the XML tree during xml2json conversion.
       *
       * @var int
       */
     public static $maxRecursionDepthAllowed=25;
 
     /**
      * @var bool
      */
     public static $useBuiltinEncoderDecoder = false;
 
     /**
      * Decodes the given $encodedValue string which is
      * encoded in the JSON format
      *
      * Uses ext/json's json_decode if available.
      *
      * @param string $encodedValue Encoded in JSON format
      * @param int $objectDecodeType Optional; flag indicating how to decode
      * objects. See {@link Zend_Json_Decoder::decode()} for details.
      * @return mixed
      */
     public static function decode($encodedValue, $objectDecodeType = Zend_Json::TYPE_ARRAY)
     {
         $encodedValue = (string) $encodedValue;
         if (function_exists('json_decode') && self::$useBuiltinEncoderDecoder !== true) {
             $decode = json_decode($encodedValue, $objectDecodeType);
 
             // php < 5.3
             if (!function_exists('json_last_error')) {
                 if (strtolower($encodedValue) === 'null') {
                     return null;
                 } elseif ($decode === null) {
                     // require_once 'Zend/Json/Exception.php';
                     throw new Zend_Json_Exception('Decoding failed');
                 }
             // php >= 5.3
             } elseif (($jsonLastErr = json_last_error()) != JSON_ERROR_NONE) {
                 // require_once 'Zend/Json/Exception.php';
                 switch ($jsonLastErr) {
                     case JSON_ERROR_DEPTH:
                         throw new Zend_Json_Exception('Decoding failed: Maximum stack depth exceeded');
                     case JSON_ERROR_CTRL_CHAR:
                         throw new Zend_Json_Exception('Decoding failed: Unexpected control character found');
                     case JSON_ERROR_SYNTAX:
                         throw new Zend_Json_Exception('Decoding failed: Syntax error');
                     default:
                         throw new Zend_Json_Exception('Decoding failed');
                 }
             }
 
             return $decode;
         }
 
         // require_once 'Zend/Json/Decoder.php';
         return Zend_Json_Decoder::decode($encodedValue, $objectDecodeType);
     }
 
     /**
      * Encode the mixed $valueToEncode into the JSON format
      *
      * Encodes using ext/json's json_encode() if available.
      *
      * NOTE: Object should not contain cycles; the JSON format
      * does not allow object reference.
      *
      * NOTE: Only public variables will be encoded
      *
      * NOTE: Encoding native javascript expressions are possible using Zend_Json_Expr.
      *       You can enable this by setting $options['enableJsonExprFinder'] = true
      *
      * @see Zend_Json_Expr
      *
      * @param  mixed $valueToEncode
      * @param  boolean $cycleCheck Optional; whether or not to check for object recursion; off by default
      * @param  array $options Additional options used during encoding
      * @return string JSON encoded object
      */
     public static function encode($valueToEncode, $cycleCheck = false, $options = array())
     {
         if (is_object($valueToEncode)) {
             if (method_exists($valueToEncode, 'toJson')) {
                 return $valueToEncode->toJson();
             } elseif (method_exists($valueToEncode, 'toArray')) {
                 return self::encode($valueToEncode->toArray(), $cycleCheck, $options);
             }
         }
 
         // Pre-encoding look for Zend_Json_Expr objects and replacing by tmp ids
         $javascriptExpressions = array();
         if(isset($options['enableJsonExprFinder'])
            && ($options['enableJsonExprFinder'] == true)
         ) {
             /**
              * @see Zend_Json_Encoder
              */
             // require_once "Zend/Json/Encoder.php";
             $valueToEncode = self::_recursiveJsonExprFinder($valueToEncode, $javascriptExpressions);
         }
 
         // Encoding
         if (function_exists('json_encode') && self::$useBuiltinEncoderDecoder !== true) {
             $encodedResult = json_encode($valueToEncode);
         } else {
             // require_once 'Zend/Json/Encoder.php';
             $encodedResult = Zend_Json_Encoder::encode($valueToEncode, $cycleCheck, $options);
         }
 
         //only do post-proccessing to revert back the Zend_Json_Expr if any.
         if (count($javascriptExpressions) > 0) {
             $count = count($javascriptExpressions);
             for($i = 0; $i < $count; $i++) {
                 $magicKey = $javascriptExpressions[$i]['magicKey'];
                 $value    = $javascriptExpressions[$i]['value'];
 
                 $encodedResult = str_replace(
                     //instead of replacing "key:magicKey", we replace directly magicKey by value because "key" never changes.
                     '"' . $magicKey . '"',
                     $value,
                     $encodedResult
                 );
             }
         }
 
          return $encodedResult;
     }
 
     /**
      * Check & Replace Zend_Json_Expr for tmp ids in the valueToEncode
      *
      * Check if the value is a Zend_Json_Expr, and if replace its value
      * with a magic key and save the javascript expression in an array.
      *
      * NOTE this method is recursive.
      *
      * NOTE: This method is used internally by the encode method.
      *
      * @see encode
      * @param array|object|Zend_Json_Expr $value a string - object property to be encoded
      * @param array $javascriptExpressions
      * @param null $currentKey
      *
      * @internal param mixed $valueToCheck
      * @return void
      */
     protected static function _recursiveJsonExprFinder(&$value, array &$javascriptExpressions, $currentKey = null)
     {
          if ($value instanceof Zend_Json_Expr) {
             // TODO: Optimize with ascii keys, if performance is bad
             $magicKey = "____" . $currentKey . "_" . (count($javascriptExpressions));
             $javascriptExpressions[] = array(
 
                 //if currentKey is integer, encodeUnicodeString call is not required.
                 "magicKey" => (is_int($currentKey)) ? $magicKey : Zend_Json_Encoder::encodeUnicodeString($magicKey),
                 "value"    => $value->__toString(),
             );
             $value = $magicKey;
         } elseif (is_array($value)) {
             foreach ($value as $k => $v) {
                 $value[$k] = self::_recursiveJsonExprFinder($value[$k], $javascriptExpressions, $k);
             }
         } elseif (is_object($value)) {
             foreach ($value as $k => $v) {
                 $value->$k = self::_recursiveJsonExprFinder($value->$k, $javascriptExpressions, $k);
             }
         }
         return $value;
     }
 
     /**
      * Return the value of an XML attribute text or the text between
      * the XML tags
      *
      * In order to allow Zend_Json_Expr from xml, we check if the node
      * matchs the pattern that try to detect if it is a new Zend_Json_Expr
      * if it matches, we return a new Zend_Json_Expr instead of a text node
      *
      * @param SimpleXMLElement $simpleXmlElementObject
      * @return Zend_Json_Expr|string
      */
     protected static function _getXmlValue($simpleXmlElementObject) {
         $pattern = '/^[\s]*new Zend_Json_Expr[\s]*\([\s]*[\"\']{1}(.*)[\"\']{1}[\s]*\)[\s]*$/';
         $matchings = array();
         $match = preg_match ($pattern, $simpleXmlElementObject, $matchings);
         if ($match) {
             return new Zend_Json_Expr($matchings[1]);
         } else {
             return (trim(strval($simpleXmlElementObject)));
         }
     }
     /**
      * _processXml - Contains the logic for xml2json
      *
      * The logic in this function is a recursive one.
      *
      * The main caller of this function (i.e. fromXml) needs to provide
      * only the first two parameters i.e. the SimpleXMLElement object and
      * the flag for ignoring or not ignoring XML attributes. The third parameter
      * will be used internally within this function during the recursive calls.
      *
      * This function converts the SimpleXMLElement object into a PHP array by
      * calling a recursive (protected static) function in this class. Once all
      * the XML elements are stored in the PHP array, it is returned to the caller.
      *
      * Throws a Zend_Json_Exception if the XML tree is deeper than the allowed limit.
      *
      * @param SimpleXMLElement $simpleXmlElementObject
      * @param boolean $ignoreXmlAttributes
      * @param integer $recursionDepth
      * @return array
      */
     protected static function _processXml($simpleXmlElementObject, $ignoreXmlAttributes, $recursionDepth=0)
     {
         // Keep an eye on how deeply we are involved in recursion.
         if ($recursionDepth > self::$maxRecursionDepthAllowed) {
             // XML tree is too deep. Exit now by throwing an exception.
             // require_once 'Zend/Json/Exception.php';
             throw new Zend_Json_Exception(
                 "Function _processXml exceeded the allowed recursion depth of " .
                 self::$maxRecursionDepthAllowed);
         } // End of if ($recursionDepth > self::$maxRecursionDepthAllowed)
 
         $children = $simpleXmlElementObject->children();
         $name = $simpleXmlElementObject->getName();
         $value = self::_getXmlValue($simpleXmlElementObject);
         $attributes = (array) $simpleXmlElementObject->attributes();
 
         if (count($children) == 0) {
             if (!empty($attributes) && !$ignoreXmlAttributes) {
                 foreach ($attributes['@attributes'] as $k => $v) {
                     $attributes['@attributes'][$k]= self::_getXmlValue($v);
                 }
                 if (!empty($value)) {
                     $attributes['@text'] = $value;
                 } 
                 return array($name => $attributes);
             } else {
                return array($name => $value);
             }
         } else {
             $childArray= array();
             foreach ($children as $child) {
                 $childname = $child->getName();
                 $element = self::_processXml($child,$ignoreXmlAttributes,$recursionDepth+1);
                 if (array_key_exists($childname, $childArray)) {
                     if (empty($subChild[$childname])) {
                         $childArray[$childname] = array($childArray[$childname]);
                         $subChild[$childname] = true;
                     }
                     $childArray[$childname][] = $element[$childname];
                 } else {
                     $childArray[$childname] = $element[$childname];
                 }
             }
             if (!empty($attributes) && !$ignoreXmlAttributes) {
                 foreach ($attributes['@attributes'] as $k => $v) {
                     $attributes['@attributes'][$k] = self::_getXmlValue($v);
                 }
                 $childArray['@attributes'] = $attributes['@attributes'];
             }
             if (!empty($value)) {
                 $childArray['@text'] = $value;
             }
             return array($name => $childArray);
         }
     }
 
     /**
      * fromXml - Converts XML to JSON
      *
      * Converts a XML formatted string into a JSON formatted string.
      * The value returned will be a string in JSON format.
      *
      * The caller of this function needs to provide only the first parameter,
      * which is an XML formatted String. The second parameter is optional, which
      * lets the user to select if the XML attributes in the input XML string
      * should be included or ignored in xml2json conversion.
      *
      * This function converts the XML formatted string into a PHP array by
      * calling a recursive (protected static) function in this class. Then, it
      * converts that PHP array into JSON by calling the "encode" static funcion.
      *
      * Throws a Zend_Json_Exception if the input not a XML formatted string.
      * NOTE: Encoding native javascript expressions via Zend_Json_Expr is not possible.
      *
      * @static
      * @access public
      * @param string $xmlStringContents XML String to be converted
      * @param boolean $ignoreXmlAttributes Include or exclude XML attributes in
      * the xml2json conversion process.
      * @return mixed - JSON formatted string on success
      * @throws Zend_Json_Exception
      */
     public static function fromXml($xmlStringContents, $ignoreXmlAttributes=true)
     {
         // Load the XML formatted string into a Simple XML Element object.
         $simpleXmlElementObject = Zend_Xml_Security::scan($xmlStringContents);
 
         // If it is not a valid XML content, throw an exception.
         if ($simpleXmlElementObject == null) {
             // require_once 'Zend/Json/Exception.php';
             throw new Zend_Json_Exception('Function fromXml was called with an invalid XML formatted string.');
         } // End of if ($simpleXmlElementObject == null)
 
         $resultArray = null;
 
         // Call the recursive function to convert the XML into a PHP array.
         $resultArray = self::_processXml($simpleXmlElementObject, $ignoreXmlAttributes);
 
         // Convert the PHP array to JSON using Zend_Json encode method.
         // It is just that simple.
         $jsonStringOutput = self::encode($resultArray);
         return($jsonStringOutput);
     }
 
     
 
     /**
      * Pretty-print JSON string
      *
      * Use 'format' option to select output format - currently html and txt supported, txt is default
      * Use 'indent' option to override the indentation string set in the format - by default for the 'txt' format it's a tab
      *
      * @param string $json Original JSON string
      * @param array $options Encoding options
      * @return string
      */
     public static function prettyPrint($json, $options = array())
     {
         $tokens = preg_split('|([\{\}\]\[,])|', $json, -1, PREG_SPLIT_DELIM_CAPTURE);
         $result = '';
         $indent = 0;
 
         $format= 'txt';
 
         $ind = "\t";
 
         if (isset($options['format'])) {
             $format = $options['format'];
         }
 
         switch ($format) {
             case 'html':
                 $lineBreak = '<br />';
                 $ind = '&nbsp;&nbsp;&nbsp;&nbsp;';
                 break;
             default:
             case 'txt':
                 $lineBreak = "\n";
                 $ind = "\t";
                 break;
         }
 
         // override the defined indent setting with the supplied option
         if (isset($options['indent'])) {
             $ind = $options['indent'];
         }
 
         $inLiteral = false;
         foreach($tokens as $token) {
             if($token == '') {
                 continue;
             }
 
             $prefix = str_repeat($ind, $indent);
             if (!$inLiteral && ($token == '{' || $token == '[')) {
                 $indent++;
                 if (($result != '') && ($result[(strlen($result)-1)] == $lineBreak)) {
                     $result .= $prefix;
                 }
                 $result .= $token . $lineBreak;
             } elseif (!$inLiteral && ($token == '}' || $token == ']')) {
                 $indent--;
                 $prefix = str_repeat($ind, $indent);
                 $result .= $lineBreak . $prefix . $token;
             } elseif (!$inLiteral && $token == ',') {
                 $result .= $token . $lineBreak;
             } else {
                 $result .= ( $inLiteral ? '' : $prefix ) . $token;
                 
                 // Count # of unescaped double-quotes in token, subtract # of
                 // escaped double-quotes and if the result is odd then we are 
                 // inside a string literal
                 if ((substr_count($token, "\"")-substr_count($token, "\\\"")) % 2 != 0) {
                     $inLiteral = !$inLiteral;
                 }
             }
         }
         return $result;
    }
 }