{

/**

* Marker constant for JSON::decode(), used to flag stack state

*/

const JSON_SLICE = 1;

/**

* Marker constant for JSON::decode(), used to flag stack state

*/

const JSON_IN_STR = 2;

/**

* Marker constant for JSON::decode(), used to flag stack state

*/

const JSON_IN_ARR = 4;

/**

* Marker constant for JSON::decode(), used to flag stack state

*/

const JSON_IN_OBJ = 8;

/**

* Marker constant for JSON::decode(), used to flag stack state

*/

const JSON_IN_CMT = 16;

/**

* Encodes an arbitrary variable into JSON format

*

* @param mixed $var any number, boolean, string, array, or object to be encoded.

* If var is a string, it will be converted to UTF-8 format first before being encoded.

* @return string JSON string representation of input var

*/

public static function encode($var)

{

switch (gettype($var)) {

case 'boolean':

return $var ? 'true' : 'false';

case 'NULL':

return 'null';

case 'integer':

return (int) $var;

case 'double':

case 'float':

return str_replace(',','.',(float)$var); // locale-independent representation

case 'string':

$charset = 'utf-8';

if (($config = EmailOneApi_Base::getConfig())) {

$charset = $config->charset;

}

if (($enc=strtoupper($charset))!=='UTF-8')

$var=iconv($enc, 'UTF-8', $var);

if(function_exists('json_encode'))

return json_encode($var);

// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT

$ascii = '';

$strlen_var = strlen($var);

/*

* Iterate over every character in the string,

* escaping with a slash or encoding to UTF-8 where necessary

*/

for ($c = 0; $c < $strlen_var; ++$c) {

$ord_var_c = ord($var{$c});

switch (true) {

case $ord_var_c == 0x08:

$ascii .= '\b';

break;

case $ord_var_c == 0x09:

$ascii .= '\t';

break;

case $ord_var_c == 0x0A:

$ascii .= '\n';

break;

case $ord_var_c == 0x0C:

$ascii .= '\f';

break;

case $ord_var_c == 0x0D:

$ascii .= '\r';

break;

case $ord_var_c == 0x22:

case $ord_var_c == 0x2F:

case $ord_var_c == 0x5C:

// double quote, slash, slosh

$ascii .= '\\'.$var{$c};

break;

case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):

// characters U-00000000 - U-0000007F (same as ASCII)

$ascii .= $var{$c};

break;

case (($ord_var_c & 0xE0) == 0xC0):

// characters U-00000080 - U-000007FF, mask 110XXXXX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$char = pack('C*', $ord_var_c, ord($var{$c+1}));

$c+=1;

$utf16 = self::utf8ToUTF16BE($char);

$ascii .= sprintf('\u%04s', bin2hex($utf16));

break;

case (($ord_var_c & 0xF0) == 0xE0):

// characters U-00000800 - U-0000FFFF, mask 1110XXXX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$char = pack('C*', $ord_var_c,

ord($var{$c+1}),

ord($var{$c+2}));

$c+=2;

$utf16 = self::utf8ToUTF16BE($char);

$ascii .= sprintf('\u%04s', bin2hex($utf16));

break;

case (($ord_var_c & 0xF8) == 0xF0):

// characters U-00010000 - U-001FFFFF, mask 11110XXX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$char = pack('C*', $ord_var_c,

ord($var{$c+1}),

ord($var{$c+2}),

ord($var{$c+3}));

$c+=3;

$utf16 = self::utf8ToUTF16BE($char);

$ascii .= sprintf('\u%04s', bin2hex($utf16));

break;

case (($ord_var_c & 0xFC) == 0xF8):

// characters U-00200000 - U-03FFFFFF, mask 111110XX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$char = pack('C*', $ord_var_c,

ord($var{$c+1}),

ord($var{$c+2}),

ord($var{$c+3}),

ord($var{$c+4}));

$c+=4;

$utf16 = self::utf8ToUTF16BE($char);

$ascii .= sprintf('\u%04s', bin2hex($utf16));

break;

case (($ord_var_c & 0xFE) == 0xFC):

// characters U-04000000 - U-7FFFFFFF, mask 1111110X

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$char = pack('C*', $ord_var_c,

ord($var{$c+1}),

ord($var{$c+2}),

ord($var{$c+3}),

ord($var{$c+4}),

ord($var{$c+5}));

$c+=5;

$utf16 = self::utf8ToUTF16BE($char);

$ascii .= sprintf('\u%04s', bin2hex($utf16));

break;

}

}

return '"'.$ascii.'"';

case 'array':

/*

* As per JSON spec if any array key is not an integer

* we must treat the the whole array as an object. We

* also try to catch a sparsely populated associative

* array with numeric keys here because some JS engines

* will create an array with empty indexes up to

* max_index which can cause memory issues and because

* the keys, which may be relevant, will be remapped

* otherwise.

*

* As per the ECMA and JSON specification an object may

* have any string as a property. Unfortunately due to

* a hole in the ECMA specification if the key is a

* ECMA reserved word or starts with a digit the

* parameter is only accessible using ECMAScript's

* bracket notation.

*/

// treat as a JSON object

if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {

return '{' .

join(',', array_map(array('EmailOneApi_Json', 'nameValue'),

array_keys($var),

array_values($var)))

. '}';

}

// treat it like a regular array

return '[' . join(',', array_map(array('EmailOneApi_Json', 'encode'), $var)) . ']';

case 'object':

if ($var instanceof Traversable)

{

$vars = array();

foreach ($var as $k=>$v)

$vars[$k] = $v;

}

else

$vars = get_object_vars($var);

return '{' .

join(',', array_map(array('EmailOneApi_Json', 'nameValue'),

array_keys($vars),

array_values($vars)))

. '}';

default:

return '';

}

}

/**

* array-walking function for use in generating JSON-formatted name-value pairs

*

* @param string $name name of key to use

* @param mixed $value reference to an array element to be encoded

*

* @return string JSON-formatted name-value pair, like '"name":value'

* @access private

*/

protected static function nameValue($name, $value)

{

return self::encode(strval($name)) . ':' . self::encode($value);

}

/**

* reduce a string by removing leading and trailing comments and whitespace

*

* @param string $str string value to strip of comments and whitespace

*

* @return string string value stripped of comments and whitespace

* @access private

*/

protected static function reduceString($str)

{

$str = preg_replace(array(

// eliminate single line comments in '// ...' form

'#^\s*//(.+)$#m',

// eliminate multi-line comments in '/* ... */' form, at start of string

'#^\s*/\*(.+)\*/#Us',

// eliminate multi-line comments in '/* ... */' form, at end of string

'#/\*(.+)\*/\s*$#Us'

), '', $str);

// eliminate extraneous space

return trim($str);

}

/**

* decodes a JSON string into appropriate variable

*

* @param string $str JSON-formatted string

* @param boolean $useArray whether to use associative array to represent object data

* @return mixed number, boolean, string, array, or object corresponding to given JSON input string.

* Note that decode() always returns strings in ASCII or UTF-8 format!

* @access public

*/

public static function decode($str, $useArray=true)

{

if(function_exists('json_decode'))

{

$json = json_decode($str,$useArray);

// based on investigation, native fails sometimes returning null.

// see: http://gggeek.altervista.org/sw/article_20070425.html

// As of PHP 5.3.6 it still fails on some valid JSON strings

if($json !== null)

return $json;

}

$str = self::reduceString($str);

switch (strtolower($str)) {

case 'true':

return true;

case 'false':

return false;

case 'null':

return null;

default:

if (is_numeric($str)) {

// Lookie-loo, it's a number

// This would work on its own, but I'm trying to be

// good about returning integers where appropriate:

// return (float)$str;

// Return float or int, as appropriate

return ((float)$str == (integer)$str)

? (integer)$str

: (float)$str;

} elseif (preg_match('/^("|\').+(\1)$/s', $str, $m) && $m[1] == $m[2]) {

// STRINGS RETURNED IN UTF-8 FORMAT

$delim = substr($str, 0, 1);

$chrs = substr($str, 1, -1);

$utf8 = '';

$strlen_chrs = strlen($chrs);

for ($c = 0; $c < $strlen_chrs; ++$c) {

$substr_chrs_c_2 = substr($chrs, $c, 2);

$ord_chrs_c = ord($chrs{$c});

switch (true) {

case $substr_chrs_c_2 == '\b':

$utf8 .= chr(0x08);

++$c;

break;

case $substr_chrs_c_2 == '\t':

$utf8 .= chr(0x09);

++$c;

break;

case $substr_chrs_c_2 == '\n':

$utf8 .= chr(0x0A);

++$c;

break;

case $substr_chrs_c_2 == '\f':

$utf8 .= chr(0x0C);

++$c;

break;

case $substr_chrs_c_2 == '\r':

$utf8 .= chr(0x0D);

++$c;

break;

case $substr_chrs_c_2 == '\\"':

case $substr_chrs_c_2 == '\\\'':

case $substr_chrs_c_2 == '\\\\':

case $substr_chrs_c_2 == '\\/':

if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||

($delim == "'" && $substr_chrs_c_2 != '\\"')) {

$utf8 .= $chrs{++$c};

}

break;

case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):

// single, escaped unicode character

$utf16 = chr(hexdec(substr($chrs, ($c+2), 2)))

. chr(hexdec(substr($chrs, ($c+4), 2)));

$utf8 .= self::utf16beToUTF8($utf16);

$c+=5;

break;

case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):

$utf8 .= $chrs{$c};

break;

case ($ord_chrs_c & 0xE0) == 0xC0:

// characters U-00000080 - U-000007FF, mask 110XXXXX

//see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$utf8 .= substr($chrs, $c, 2);

++$c;

break;

case ($ord_chrs_c & 0xF0) == 0xE0:

// characters U-00000800 - U-0000FFFF, mask 1110XXXX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$utf8 .= substr($chrs, $c, 3);

$c += 2;

break;

case ($ord_chrs_c & 0xF8) == 0xF0:

// characters U-00010000 - U-001FFFFF, mask 11110XXX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$utf8 .= substr($chrs, $c, 4);

$c += 3;

break;

case ($ord_chrs_c & 0xFC) == 0xF8:

// characters U-00200000 - U-03FFFFFF, mask 111110XX

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$utf8 .= substr($chrs, $c, 5);

$c += 4;

break;

case ($ord_chrs_c & 0xFE) == 0xFC:

// characters U-04000000 - U-7FFFFFFF, mask 1111110X

// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8

$utf8 .= substr($chrs, $c, 6);

$c += 5;

break;

}

}

return $utf8;

} elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {

// array, or object notation

if ($str{0} == '[') {

$stk = array(self::JSON_IN_ARR);

$arr = array();

} else {

if ($useArray) {

$stk = array(self::JSON_IN_OBJ);

$obj = array();

} else {

$stk = array(self::JSON_IN_OBJ);

$obj = new stdClass();

}

}

$stk[] = array('what' => self::JSON_SLICE, 'where' => 0, 'delim' => false);

$chrs = substr($str, 1, -1);

$chrs = self::reduceString($chrs);

if ($chrs == '') {

if (reset($stk) == self::JSON_IN_ARR) {

return $arr;

} else {

return $obj;

}

}

//print("\nparsing {$chrs}\n");

$strlen_chrs = strlen($chrs);

for ($c = 0; $c <= $strlen_chrs; ++$c) {

$top = end($stk);

$substr_chrs_c_2 = substr($chrs, $c, 2);

if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == self::JSON_SLICE))) {

// found a comma that is not inside a string, array, etc.,

// OR we've reached the end of the character list

$slice = substr($chrs, $top['where'], ($c - $top['where']));

$stk[] = array('what' => self::JSON_SLICE, 'where' => ($c + 1), 'delim' => false);

//print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

if (reset($stk) == self::JSON_IN_ARR) {

// we are in an array, so just push an element onto the stack

$arr[] = self::decode($slice,$useArray);

} elseif (reset($stk) == self::JSON_IN_OBJ) {

// we are in an object, so figure

// out the property name and set an

// element in an associative array,

// for now

if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {

// "name":value pair

$key = self::decode($parts[1],$useArray);

$val = self::decode($parts[2],$useArray);

if ($useArray) {

$obj[$key] = $val;

} else {

$obj->$key = $val;

}

} elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {

// name:value pair, where name is unquoted

$key = $parts[1];

$val = self::decode($parts[2],$useArray);

if ($useArray) {

$obj[$key] = $val;

} else {

$obj->$key = $val;

}

}

}

} elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != self::JSON_IN_STR)) {

// found a quote, and we are not inside a string

$stk[] = array('what' => self::JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c});

//print("Found start of string at {$c}\n");

} elseif (($chrs{$c} == $top['delim']) &&

($top['what'] == self::JSON_IN_STR) &&

(($chrs{$c - 1} != "\\") ||

($chrs{$c - 1} == "\\" && $chrs{$c - 2} == "\\"))) {

// found a quote, we're in a string, and it's not escaped

array_pop($stk);

//print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");

} elseif (($chrs{$c} == '[') &&

in_array($top['what'], array(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) {

// found a left-bracket, and we are in an array, object, or slice

$stk[] = array('what' => self::JSON_IN_ARR, 'where' => $c, 'delim' => false);

//print("Found start of array at {$c}\n");

} elseif (($chrs{$c} == ']') && ($top['what'] == self::JSON_IN_ARR)) {

// found a right-bracket, and we're in an array

array_pop($stk);

//print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

} elseif (($chrs{$c} == '{') &&

in_array($top['what'], array(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) {

// found a left-brace, and we are in an array, object, or slice

$stk[] = array('what' => self::JSON_IN_OBJ, 'where' => $c, 'delim' => false);

//print("Found start of object at {$c}\n");

} elseif (($chrs{$c} == '}') && ($top['what'] == self::JSON_IN_OBJ)) {

// found a right-brace, and we're in an object

array_pop($stk);

//print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

} elseif (($substr_chrs_c_2 == '/*') &&

in_array($top['what'], array(self::JSON_SLICE, self::JSON_IN_ARR, self::JSON_IN_OBJ))) {

// found a comment start, and we are in an array, object, or slice

$stk[] = array('what' => self::JSON_IN_CMT, 'where' => $c, 'delim' => false);

$c++;

//print("Found start of comment at {$c}\n");

} elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == self::JSON_IN_CMT)) {

// found a comment end, and we're in one now

array_pop($stk);

$c++;

for ($i = $top['where']; $i <= $c; ++$i)

$chrs = substr_replace($chrs, ' ', $i, 1);

//print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");

}

}

if (reset($stk) == self::JSON_IN_ARR) {

return $arr;

} elseif (reset($stk) == self::JSON_IN_OBJ) {

return $obj;

}

}

}

}

/**

* This function returns any UTF-8 encoded text as a list of

* Unicode values:

* @param string $str string to convert

* @return string

* @author Scott Michael Reynen <scott@randomchaos.com>

* @link http://www.randomchaos.com/document.php?source=php_and_unicode

* @see unicodeToUTF8()

*/

protected static function utf8ToUnicode( &$str )

{

$unicode = array();

$values = array();

$lookingFor = 1;

for ($i = 0; $i < strlen( $str ); $i++ )

{

$thisValue = ord( $str[ $i ] );

if ( $thisValue < 128 )

$unicode[] = $thisValue;

else

{

if ( count( $values ) == 0 )

$lookingFor = ( $thisValue < 224 ) ? 2 : 3;

$values[] = $thisValue;

if ( count( $values ) == $lookingFor )

{

$number = ( $lookingFor == 3 ) ?

( ( $values[0] % 16 ) * 4096 ) + ( ( $values[1] % 64 ) * 64 ) + ( $values[2] % 64 ):

( ( $values[0] % 32 ) * 64 ) + ( $values[1] % 64 );

$unicode[] = $number;

$values = array();

$lookingFor = 1;

}

}

}

return $unicode;

}

/**

* This function converts a Unicode array back to its UTF-8 representation

* @param string $str string to convert

* @return string

* @author Scott Michael Reynen <scott@randomchaos.com>

* @link http://www.randomchaos.com/document.php?source=php_and_unicode

* @see utf8ToUnicode()

*/

protected static function unicodeToUTF8( &$str )

{

$utf8 = '';

foreach( $str as $unicode )

{

if ( $unicode < 128 )

{

$utf8.= chr( $unicode );

}

elseif ( $unicode < 2048 )

{

$utf8.= chr( 192 + ( ( $unicode - ( $unicode % 64 ) ) / 64 ) );

$utf8.= chr( 128 + ( $unicode % 64 ) );

}

else

{

$utf8.= chr( 224 + ( ( $unicode - ( $unicode % 4096 ) ) / 4096 ) );

$utf8.= chr( 128 + ( ( ( $unicode % 4096 ) - ( $unicode % 64 ) ) / 64 ) );

$utf8.= chr( 128 + ( $unicode % 64 ) );

}

}

return $utf8;

}

/**

* UTF-8 to UTF-16BE conversion.

*

* Maybe really UCS-2 without mb_string due to utf8ToUnicode limits

* @param string $str string to convert

* @param boolean $bom whether to output BOM header

* @return string

*/

protected static function utf8ToUTF16BE(&$str, $bom = false)

{

$out = $bom ? "\xFE\xFF" : '';

if(function_exists('mb_convert_encoding'))

return $out.mb_convert_encoding($str,'UTF-16BE','UTF-8');

$uni = self::utf8ToUnicode($str);

foreach($uni as $cp)

$out .= pack('n',$cp);

return $out;

}

/**

* UTF-8 to UTF-16BE conversion.

*

* Maybe really UCS-2 without mb_string due to utf8ToUnicode limits

* @param string $str string to convert

* @return string

*/

protected static function utf16beToUTF8(&$str)

{

$uni = unpack('n*',$str);

return self::unicodeToUTF8($uni);

}