<?php

namespace BRSystems\Core\Library\cJSON;

use Exception;

/**
 * JSON class,
 *	simple layer to use core function (PHP 5.2), PECL extension (PHP >= 4.3.0) or Pear ServiceJSON
 * ______________________________________________________________
 * @example
 * 	echo cJSON::encode(1.23);	// string, 1.23
 *      echo cJSON::decode("1.23");	// float, 1.23
 * --------------------------------------------------------------
 * @Compatibility	PHP 5.2 / PHP with json PECL extension / PHP with Pear ServiceJSON
 * @Dependencies	Pear ServiceJSON (file JSON.php) [http://pear.php.net/pepr/pepr-proposal-show.php?id=198]
 * 			if there isn't Pecl extension [http://pecl.php.net/package/json]
 * 			or PHP version is less than 5.2
 * @Author		Andrea Giammarchi
 * @Site		http://www.devpro.it/
 * @Date		2006/11/06
 * @LastMOd		2006/11/19 [faster conversion problems (Pear and Pecl) in range 00-1f]
 * @Version		0.3b
 */
class cJSON
{
    /**
     * public "static" method,
     * converts a JSON string into compatible value.
     * cJSON::decode($input:String[, $assoc:Bool]):Mixed
     *
     * @param String $input JSON compatible string
     * @param Bool $assoc true to convert object into associative arrays false by default
     * @return Mixed Array, Standard Class, String, Float, integer, Boolean or null value.
     */
    public static function decode($input, $assoc = false)
    {
        return cJSON::__rawjsondecode($input, $assoc);
    }

    /**
     * public "static" method,
     * converts generic variable into JSON string.
     * cJSON::encode($input:Mixed):String
     *
     * @param mixed	$input - Array, Standard Class, String, Float, integer, Boolean or null value to convert
     * @param bool $slashes - add slashes for encode
     * @return String - JSON string ($input param rappresentation)
     */
    public static function encode($input, bool $slashes = false)
    {
        if ($slashes) {
            return addslashes(cJSON::__rawjsonencode($input));
        } else {
            return cJSON::__rawjsonencode($input);
        }
    }

    /**
     * "private static" method,
     * 	choose json core function or Pear Service to decode
     */
    private static function __decode($input, &$assoc)
    {
        return json_decode($input, $assoc);
    }

    /**
     * "private static" method,
     * 	choose json core function or Pear Service to encode
     */
    private static function __encode($input)
    {
        $result = json_encode($input);
        return cJSON::__rawjsonconvert($result);
    }

    /**
     * "private static" method,
     * 	checks if JSON string is not an object or an array then returns correct value.
     */
    private static function __rawjsondecode(&$input, &$assoc){
        if(preg_match('#^(\[[^\a]+?\]|{[^\a]+?})$#', $input)){
            return cJSON::__decode($input, $assoc);
        }else{
            $arr = cJSON::__decode('['.$input.']', $assoc);
            return (!empty($arr) ? array_shift($arr) : array());
        }
    }

    /**
     * "private static" method,
     * 	checks if input var is not an object or an array then converts correct value.
     * NOTE: it's quite a non-sense but json_decode doesn't accept primitive variables then
     * this method is "paranoia style"
     */
    private static function __rawjsonencode(&$input){
        if(is_array($input) || is_object($input))
            $input = cJSON::__encode($input);
        elseif(is_string($input) || is_float($input) || is_int($input) || is_bool($input) || is_null($input))
            $input = substr(cJSON::__encode(array($input)), 1, -1);
        else
            $input = 'null';
        return $input;
    }

    /**
     * "private static" method,
     * 	converts unconverted characters in correct range between 00-1f.
     */
    private static function __rawjsonconvert(&$str){
        $f = $r = array();
        foreach(array_merge(range(0, 7), array(11), range(14, 31)) as $v) {
            $f[] = chr($v);
            $r[] = "\\u00".sprintf("%02x", $v);
        }
        return str_replace($f, $r, $str);
    }

    /**
     * Function that converts generic variable into JSON string adding custom param "jsonok"
     *
     * @param mixed	$data - Array, Standard Class, String, Float, integer, Boolean or null value to convert
     * @param bool $bAddSlashes - add slashes for encode
     * @return void
     * @throws null
     */
    public static function sendOk($data = [], bool $bAddSlashes = false): void
    {
        if (is_array($data)) {
            $data = ['jsonok' => true] + $data;
        } else {
            $data = ['jsonok' => true, 'data' => $data];
        }

        if ($bAddSlashes) {
            $output = addslashes(self::encode($data));
        } else {
            $output = self::encode($data);
        }

        if (isset($GLOBALS['coverage_tests_running'])) {
            throw new Exception($output);
        }

        die($output);
    }

    /**
     * Function that converts generic variable into JSON string adding custom param "error"
     *
     * @param mixed	$data - Array, Standard Class, String, Float, integer, Boolean or null value to convert
     * @param bool $bAddSlashes - add slashes for encode
     * @return void
     * @throws null
     */
    public static function sendError($data = [], bool $bAddSlashes = false): void
    {
        if (is_array($data)) {
            $data = ['error' => true] + $data;
        } else {
            $data = ['error' => true, 'data' => $data];
        }

        if ($bAddSlashes) {
            $output = addslashes(self::encode($data));
        } else {
            $output = self::encode($data);
        }

        if (isset($GLOBALS['coverage_tests_running'])) {
            throw new Exception($output);
        }

        die($output);
    }
}