pos/is4c-nf/lib/JsonLib.php
<?php
/*******************************************************************************
Copyright 2010 Whole Foods Co-op.
This file is part of IT CORE.
IT CORE is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
IT CORE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
in the file license.txt along with IT CORE; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*********************************************************************************/
namespace COREPOS\pos\lib;
/**
@class JsonLib
Functions for JSON support in PHP < 5.3
*/
class JsonLib {
/**
Convert an array to a JSON string
@param $arr an array of values
@return A JSON string representing the array
*/
static public function arrayToJson($arr)
{
$ret = "[";
for($i=0;$i<count($arr);$i++) {
if (isset($arr[$i])) {
$ret .= self::encodeValueJson($arr[$i]).",";
} else {
$ret = "";
break; // not a numeric indexed array
}
}
if (!empty($ret)) {
$ret = substr($ret,0,strlen($ret)-1)."]";
return $ret;
}
$ret = "{";
foreach($arr as $k=>$v) {
$ret .= '"'.$k.'":';
$ret .= self::encodeValueJson($v).",";
}
$ret = substr($ret,0,strlen($ret)-1)."}";
return $ret;
}
static public function array_to_json($arr)
{
return self::arrayToJson($arr);
}
/**
Convert a variable to a JSON string
@param $val a single variable
@return A JSON string representing the variable
*/
static public function encodeValueJson($val)
{
if (is_array($val)) {
return self::array_to_json($val);
}
if (is_numeric($val)) {
return ltrim($val,'0');
}
if ($val === true) {
return 'true';
}
if ($val === false) {
return 'false';
}
return '"'.addcslashes($val,"\\\"\r\n\t").'"';
}
/**
Remove newlines, carriage returns, and tabs
from the string (some browser don't like these
in JSON strings)
@str a string
@return the modified string
*/
static public function fixstring($str)
{
$str = str_replace("\n","",$str);
$str = str_replace("\r","",$str);
$str = str_replace("\t","",$str);
}
static public function prettyJSON($json)
{
$result= '';
$pos = 0;
$strLen= strlen($json);
$indentStr = ' ';
$newLine = "\n";
$prevChar= '';
$outOfQuotes = true;
for ($i=0; $i<=$strLen; $i++) {
// Grab the next character in the string.
$char = substr($json, $i, 1);
// Are we inside a quoted string?
if ($char == '"' && $prevChar != '\\') {
$outOfQuotes = !$outOfQuotes;
// If this character is the end of an element,
// output a new line and indent the next line.
} else if (($char == '}' || $char == ']') && $outOfQuotes) {
$result .= $newLine;
$pos--;
for ($j=0; $j<$pos; $j++) {
$result .= $indentStr;
}
}
// Add the character to the result string.
$result .= $char;
// If the last character was the beginning of an element,
// output a new line and indent the next line.
if (($char == ',' || $char == '{' || $char == '[') && $outOfQuotes) {
$result .= $newLine;
if ($char == '{' || $char == '[') {
$pos ++;
}
for ($j = 0; $j < $pos; $j++) {
$result .= $indentStr;
}
}
$prevChar = $char;
}
return $result;
}
}