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<?php
/**
*
* ThinkUp/webapp/_lib/class.JSONDecoder.php
*
* Copyright (c) 2013 Gina Trapani
*
* LICENSE:
*
* This file is part of ThinkUp (http://thinkup.com).
*
* ThinkUp 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.
*
* ThinkUp 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 along with ThinkUp. If not, see
* <http://www.gnu.org/licenses/>.
*
* @author Gina Trapani
* @license http://www.gnu.org/licenses/gpl.html
* @copyright 2013 Gina Trapani
*/
class JSONDecoder {
/**
* Decode JSON.
* @param str $json
* @param bool $assoc Whether or not to return an associative array, defaults to false
* @return mixed Decoded JSON
* @throws JSONDecoderException
*/
public static function decode($json, $assoc = false) {
if (empty($json)) {
throw new JSONDecoderException('Cannot decode an empty string');
}
$result = json_decode($json, $assoc);
/*
http://www.php.net/manual/en/function.json-last-error.php
JSON_ERROR_NONE No error has occurred
JSON_ERROR_DEPTH The maximum stack depth has been exceeded
JSON_ERROR_STATE_MISMATCH Invalid or malformed JSON
JSON_ERROR_CTRL_CHAR Control character error, possibly incorrectly encoded
JSON_ERROR_SYNTAX Syntax error
JSON_ERROR_UTF8 Malformed UTF-8 characters, possibly incorrectly encoded PHP 5.3.3
*/
if (function_exists('json_last_error')) { //PHP 5.3 and later
switch (json_last_error()) {
case JSON_ERROR_DEPTH:
$error = 'The maximum stack depth has been exceeded';
break;
case JSON_ERROR_STATE_MISMATCH:
$error = 'Invalid or malformed JSON';
break;
case JSON_ERROR_CTRL_CHAR:
$error = 'Control character error, possibly incorrectly encoded';
break;
case JSON_ERROR_SYNTAX:
$error = 'Syntax error due to malformed JSON';
break;
// PHP 5.3.3 only
// case JSON_ERROR_UTF8:
// $error = 'Malformed UTF-8 characters, possibly incorrectly encoded';
// break;
case JSON_ERROR_NONE:
default:
$error = '';
}
}
if (!empty($error)) {
throw new JSONDecoderException('JSON Error: '.$error);
} elseif ($result === null) {
throw new JSONDecoderException('JSON Error decoding data');
}
return $result;
}
}