<?php

namespace Espo\Utils;
use Espo\Utils as Utils;

class JSON extends BaseUtils
{
	/**
     * JSON encode a string
     *
     * @param string $value
     * @param int $options Default 0
     * @param int $depth Default 512
     * @return string
     */
	public static function encode($value, $options = 0, $depth = 512)
	{
		if(version_compare(phpversion(), '5.5.0', '>=')) {
	        $json = json_encode($value, $options, $depth);
	    }
	    elseif(version_compare(phpversion(), '5.3.0', '>=')) {
			/*Check if options are supported for this version of PHP*/
	    	if (is_int($options)) {
            	$json = json_encode($value, $options);
	    	}
			else {
				$json = json_encode($value);
			}
	    }
	    else {
	        $json = json_encode($value);
	    }

		if ($json===null) {
			$Log= new Utils\Log();
			$Log->add('ERROR', 'Value cannot be decoded to JSON - '.print_r($value, true));
		}

        return $json;

		//JSON_PRETTY_PRINT
	}

	/**
     * JSON decode a string (Fixed problem with "\")
     *
     * @param string $json
     * @param bool $assoc Default false
     * @param int $depth Default 512
     * @param int $options Default 0
     * @return object
     */
	public static function decode($json, $assoc = false, $depth = 512, $options = 0)
	{
		if (is_array($json)) {
            $Log= new Utils\Log();
			$Log->add('WARNING', 'JSON:decode() - JSON cannot be decoded - '.$json);
			return false;
		}

		/*if (strstr($json, '\\') && !strstr($json, '(\\')) {
        	$json = preg_replace('/([^\\\])(\\\)([^\/\\\])/', '$1\\\\\\\$3', $json);
		}  */

	    if(version_compare(phpversion(), '5.4.0', '>=')) {
	        $json = json_decode($json, $assoc, $depth, $options);
	    }
	    elseif(version_compare(phpversion(), '5.3.0', '>=')) {
	        $json = json_decode($json, $assoc, $depth);
	    }
	    else {
	        $json = json_decode($json, $assoc);
	    }

		/*if ($json===null) {
			$Log= new Utils\Log();
			$Log->add('WARNING', 'JSON:decode() - JSON string cannot be decoded - '.$json);
		}*/

	    return $json;
	}


    /**
     * Check if the string is JSON
     *
     * @param string $json
     * @return bool
     */
	public static function isJSON($json){
		if ($json=='[]') {
			return true;
		} 

	    return self::decode($json) != null;
	}

}

?>