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<?php
/**
 * Utility functions
 *
 * Standard: PSR-2
 * @link http://www.php-fig.org/psr/psr-2
 *
 * @package snaplib
 * @subpackage classes/utilities
 * @copyright (c) 2017, Snapcreek LLC
 * @license	https://opensource.org/licenses/GPL-3.0 GNU Public License
 *
 */
defined('ABSPATH') || defined('DUPXABSPATH') || exit;

if (!class_exists('DupLiteSnapLibUtil', false)) {

class DupLiteSnapLibUtil
    {

public static function getArrayValue(&$array, $key, $required = true, $default = null)
        {
            if (array_key_exists($key, $array)) {
                return $array[$key];
            } else {
                if ($required) {
                    throw new Exception("Key {$key} not present in array");
                } else {
                    return $default;
                }
            }
        }

/**
         * Gets the calling function name from where this method is called
         *
         * @return  string   Returns the calling function name from where this method is called
         */
        public static function getCallingFunctionName($backTraceBack = 0)
        {
            $callers     = debug_backtrace();
            $backTraceL1 = 1 + $backTraceBack;
            $backTraceL2 = 2 + $backTraceBack;
            $result      = '['.str_pad(basename($callers[$backTraceL1]['file']), 25, '_', STR_PAD_RIGHT).':'.str_pad($callers[$backTraceL1]['line'], 4, ' ', STR_PAD_LEFT).']';
            if (isset($callers[$backTraceL2]) && (isset($callers[$backTraceL2]['class']) || isset($callers[$backTraceL2]['function']))) {
                $result .= ' [';
                $result .= isset($callers[$backTraceL2]['class']) ? $callers[$backTraceL2]['class'].'::' : '';
                $result .= isset($callers[$backTraceL2]['function']) ? $callers[$backTraceL2]['function'] : '';
                $result .= ']';
            }

return str_pad($result, 80, '_', STR_PAD_RIGHT);
        }

public static function getWorkPercent($startingPercent, $endingPercent, $totalTaskCount, $currentTaskCount)
        {
            if ($totalTaskCount > 0) {
                $percent = $startingPercent + (($endingPercent - $startingPercent) * ($currentTaskCount / (float) $totalTaskCount));
            } else {
                $percent = $startingPercent;
            }

return min(max($startingPercent, $percent), $endingPercent);
        }

public static function make_hash()
        {
            // IMPORTANT!  Be VERY careful in changing this format - the FTP delete logic requires 3 segments with the last segment to be the date in YmdHis format.
            try {
                if (function_exists('random_bytes') && self::PHP53()) {
                    return bin2hex(random_bytes(8)).mt_rand(1000, 9999).'_'.date("YmdHis");
                } else {
                    return strtolower(md5(uniqid(rand(), true))).'_'.date("YmdHis");
                }
            }
            catch (Exception $exc) {
                return strtolower(md5(uniqid(rand(), true))).'_'.date("YmdHis");
            }
        }

public static function PHP53()
        {
            return version_compare(PHP_VERSION, '5.3.2', '>=');
        }

/**
         * Groups an array into arrays by a given key, or set of keys, shared between all array members.
         *
         * Based on {@author Jake Zatecky}'s {@link https://github.com/jakezatecky/array_group_by array_group_by()} function.
         * This variant allows $key to be closures.
         *
         * @param array $array   The array to have grouping performed on.
         * @param mixed $key,... The key to group or split by. Can be a _string_, an _integer_, a _float_, or a _callable_.
         *                       - If the key is a callback, it must return a valid key from the array.
         *                       - If the key is _NULL_, the iterated element is skipped.
         *                       - string|int callback ( mixed $item )
         *
         * @return array|null Returns a multidimensional array or `null` if `$key` is invalid.
         */
        public static function arrayGroupBy(array $array, $key)
        {
            if (!is_string($key) && !is_int($key) && !is_float($key) && !is_callable($key)) {
                trigger_error('array_group_by(): The key should be a string, an integer, or a callback', E_USER_ERROR);
                return null;
            }
            $func    = (!is_string($key) && is_callable($key) ? $key : null);
            $_key    = $key;
            // Load the new array, splitting by the target key
            $grouped = array();
            foreach ($array as $value) {
                $key = null;
                if (is_callable($func)) {
                    $key = call_user_func($func, $value);
                } elseif (is_object($value) && isset($value->{$_key})) {
                    $key = $value->{$_key};
                } elseif (isset($value[$_key])) {
                    $key = $value[$_key];
                }
                if ($key === null) {
                    continue;
                }
                $grouped[$key][] = $value;
            }
            // Recursively build a nested grouping if more parameters are supplied
            // Each grouped array value is grouped according to the next sequential key
            if (func_num_args() > 2) {
                $args = func_get_args();
                foreach ($grouped as $key => $value) {
                    $params        = array_merge(array($value), array_slice($args, 2, func_num_args()));
                    $grouped[$key] = call_user_func_array(array(__CLASS__, 'arrayGroupBy'), $params);
                }
            }
            return $grouped;
        }

/**
         * Converts human readable types (10GB) to bytes
         *
         * @param string $from   A human readable byte size such as 100MB
         *
         * @return int	Returns and integer of the byte size
         */
        public static function convertToBytes($from)
        {
            if (is_numeric($from)) {
                return $from;
            }

$number = substr($from, 0, -2);
            switch (strtoupper(substr($from, -2))) {
                case "KB": return $number * 1024;
                case "MB": return $number * pow(1024, 2);
                case "GB": return $number * pow(1024, 3);
                case "TB": return $number * pow(1024, 4);
                case "PB": return $number * pow(1024, 5);
            }

$number = substr($from, 0, -1);
            switch (strtoupper(substr($from, -1))) {
                case "K": return $number * 1024;
                case "M": return $number * pow(1024, 2);
                case "G": return $number * pow(1024, 3);
                case "T": return $number * pow(1024, 4);
                case "P": return $number * pow(1024, 5);
            }
            return $from;
        }

/**
         *  Sanitize input for XSS code
         *
         *  @param string $val		The value to sanitize
         *
         *  @return string Returns the input value cleaned up.
         */
        public static function sanitize($input)
        {
            return filter_var($input, FILTER_SANITIZE_FULL_SPECIAL_CHARS);
        }

/**
         * remove all non stamp chars from string
         * 
         * @param string $string
         * @return string
         */
        public static function sanitize_non_stamp_chars($string)
        {
            return preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x9F]/u', '', $string);
        }

/**
         * remove all non stamp chars from string and newline
         * trim string 
         * 
         * @param string $string
         * @return string
         */
        public static function sanitize_non_stamp_chars_and_newline($string)
        {
            return preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x9F\r\n]/u', '', $string);
        }

/**
         * remove all non stamp chars from string and newline
         * trim string 
         * 
         * @param string $string
         * @return string
         */
        public static function sanitize_non_stamp_chars_newline_and_trim($string)
        {
            return trim(self::sanitize_non_stamp_chars_and_newline($string));
        }

/**
         * Determines whether a PHP ini value is changeable at runtime.
         *
         * @since 4.6.0
         *
         * @staticvar array $ini_all
         *
         * @link https://secure.php.net/manual/en/function.ini-get-all.php
         *
         * @param string $setting The name of the ini setting to check.
         * @return bool True if the value is changeable at runtime. False otherwise.
         */
        public static function wp_is_ini_value_changeable($setting)
        {
            // if ini_set is disabled can change the values
            if (!function_exists('ini_set')) {
                return false;
            }

if (function_exists('wp_is_ini_value_changeable')) {
                return wp_is_ini_value_changeable($setting);
            }

static $ini_all;

if (!isset($ini_all)) {
                $ini_all = false;
                // Sometimes `ini_get_all()` is disabled via the `disable_functions` option for "security purposes".
                if (function_exists('ini_get_all')) {
                    $ini_all = ini_get_all();
                }
            }

// Bit operator to workaround https://bugs.php.net/bug.php?id=44936 which changes access level to 63 in PHP 5.2.6 - 5.2.17.
            if (isset($ini_all[$setting]['access']) && ( INI_ALL === ( $ini_all[$setting]['access'] & 7 ) || INI_USER === ( $ini_all[$setting]['access'] & 7 ) )) {
                return true;
            }

// If we were unable to retrieve the details, fail gracefully to assume it's changeable.
            if (!is_array($ini_all)) {
                return true;
            }

return false;
        }

/**
         * The val value returns if it is between min and max otherwise it returns min or max
         * 
         * @param int $val
         * @param int $min
         * @param int $max
         * @return int
         */
        public static function getIntBetween($val, $min, $max)
        {
            return min((int) $max, max((int) $min, (int) $val));
        }

/**
 * Find matching string from $strArr1 and $strArr2 until first numeric occurence
 *
 * @param array $strArr1 array of strings
 * @param array $strArr2 array of strings
 * @return string matching str which will be best for replacement
 */
 public static function getMatchingStrFromArrayElemsUntilFirstNumeric($strArr1, $strArr2)
 {
 $matchingStr = '';
 $strPartialArr = array();
 foreach ($strArr1 as $str1) {
 $str1_str_length = strlen($str1);
 $tempStr1Chars = str_split($str1);
 $tempPartialStr = '';
 // The flag is for whether non-numeric character passed after numeric character occurence in str1. For ex. str1 is utf8mb4, the flag wil be true when parsing m after utf8.
 $numericCharPassFlag = false;
 $charPositionInStr1 = 0;
 while ($charPositionInStr1 < $str1_str_length) {
 if ($numericCharPassFlag && !is_numeric($tempStr1Chars[$charPositionInStr1])) {
 break;
 }
 if (is_numeric($tempStr1Chars[$charPositionInStr1])) {
 $numericCharPassFlag = true;
 }
 $tempPartialStr .= $tempStr1Chars[$charPositionInStr1];
 $charPositionInStr1++;
 }
 $strPartialArr[] = $tempPartialStr;
 }
 foreach ($strPartialArr as $strPartial) {
 if (!empty($matchingStr)) {
 break;
 }
 foreach ($strArr2 as $str2) {
 if (0 === stripos($str2, $strPartial)) {
 $matchingStr = $str2;
 break;
 }
 }
 }

return $matchingStr;
        }

/**
         * Find matching string from $strArr1 and $strArr2
         *
         * @param array   $strArr1                  array of strings
         * @param array   $strArr2                  array of strings
         * @param boolean $match_until_first_numeric only match until first numeric occurrence
         * @return string matching str which will be best for replacement
         */
        public static function getMatchingStrFromArrayElemsBasedOnUnderScore($strArr1, $strArr2)
        {
            $matchingStr = '';

$str1PartialFirstArr = array();
 $str1PartialFirstArr = array();
 $str1PartialStartNMiddleArr = array();
 $str1PartialMiddleNLastArr = array();
 $str1PartialLastArr = array();
 foreach ($strArr1 as $str1) {
 $str1PartialArr = explode('_', $str1);
 $str1_parts_count = count($str1PartialArr);
 $str1PartialFirstArr[] = $str1PartialArr[0];
 $str1LastPartIndex = $str1_parts_count - 1;
 if ($str1LastPartIndex > 0) {
 $str1PartialLastArr[] = $str1PartialArr[$str1LastPartIndex];
 $str1PartialStartNMiddleArr[] = substr($str1, 0, strripos($str1, '_'));
 $str1PartialMiddleNLastArr[] = substr($str1, stripos($str1, '_') + 1);
 }
 }
 for ($caseNo = 1; $caseNo <= 5; $caseNo++) {
 if (!empty($matchingStr)) {
 break;
 }
 foreach ($strArr2 as $str2) {
 switch ($caseNo) {
 // Both Start and End match
 case 1:
 $str2PartialArr = explode('_', $str2);
 $str2FirstPart = $str2PartialArr[0];
 $str2PartsCount = count($str2PartialArr);
 $str2LastPartIndex = $str2PartsCount - 1;
 if ($str2LastPartIndex > 0) {
 $str2LastPart = $str2PartialArr[$str2LastPartIndex];
 } else {
 $str2LastPart = '';
 }
 if (!empty($str2LastPart) && !empty($str1PartialLastArr) && in_array($str2FirstPart, $str1PartialFirstArr) && in_array($str2LastPart, $str1PartialLastArr)) {
 $matchingStr = $str2;
 }
 break;
 // Start Middle Match
 case 2:
 $str2PartialFirstNMiddleParts = substr($str2, 0, strripos($str2, '_'));
 if (in_array($str2PartialFirstNMiddleParts, $str1PartialStartNMiddleArr)) {
 $matchingStr = $str2;
 }
 break;
 // End Middle Match
 case 3:
 $str2PartialMiddleNLastParts = stripos($str2, '_') !== false ? substr($str2, stripos($str2, '_') + 1) : '';
 if (!empty($str2PartialMiddleNLastParts) && in_array($str2PartialMiddleNLastParts, $str1PartialMiddleNLastArr)) {
 $matchingStr = $str2;
 }
 break;
 // Start Match
 case 4:
 $str2PartialArr = explode('_', $str2);
 $str2FirstPart = $str2PartialArr[0];
 if (in_array($str2FirstPart, $str1PartialFirstArr)) {
 $matchingStr = $str2;
 }
 break;
 // End Match
 case 5:
 $str2PartialArr = explode('_', $str2);
 $str2PartsCount = count($str2PartialArr);
 $str2LastPartIndex = $str2PartsCount - 1;
 if ($str2LastPartIndex > 0) {
 $str2LastPart = $str2PartialArr[$str2LastPartIndex];
 } else {
 $str2LastPart = '';
 }
 if (!empty($str2LastPart) && in_array($str2LastPart, $str1PartialLastArr)) {
 $matchingStr = $str2;
 }
 break;
 }
 if (!empty($matchingStr)) {
 break;
 }
 }
 }
 return $matchingStr;
 }

/**
 * Gets a specific external variable by name and optionally filters it
 * @param int $type One of <code>INPUT_GET</code>, <code>INPUT_POST</code>, <code>INPUT_COOKIE</code>, <code>INPUT_SERVER</code>, or <code>INPUT_ENV</code>.
 * @param string $variable_name Name of a variable to get.
 * @param int $filter The ID of the filter to apply. The Types of filters manual page lists the available filters. If omitted, <code>FILTER_DEFAULT</code> will be used, which is equivalent to <code>FILTER_UNSAFE_RAW</code>. This will result in no filtering taking place by default.
 * @param mixed $options Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array.
 * @return mixed Value of the requested variable on success, <code>FALSE</code> if the filter fails, or <code>NULL</code> if the <code>variable_name</code> variable is not set. If the flag <code>FILTER_NULL_ON_FAILURE</code> is used, it returns <code>FALSE</code> if the variable is not set and <code>NULL</code> if the filter fails.
 * @link http://php.net/manual/en/function.filter-input.php
 * @see filter_var(), filter_input_array(), filter_var_array()
 * @since PHP 5 >= 5.2.0, PHP 7
 */
 public static function filterInputRequest($variable_name, $filter = FILTER_DEFAULT, $options = NULL)
 {
 if (isset($_GET[$variable_name]) && !isset($_POST[$variable_name])) {
 return filter_input(INPUT_GET, $variable_name, $filter, $options);
 }

return filter_input(INPUT_POST, $variable_name, $filter, $options);
        }

/**
         * Implemented array_key_first
         *
         * @link https://www.php.net/manual/en/function.array-key-first.php
         * @param array $arr
         * @return int|string|null
         */
        public static function arrayKeyFirst($arr)
        {
            if (!function_exists('array_key_first')) {
                foreach ($arr as $key => $unused) {
                    return $key;
                }
                return null;
            } else {
                return array_key_first($arr);
            }
        }

/**
         * Get number of bit supported by PHP
         *
         * @return string
         */
        public static function getArchitectureString()
        {
            return (PHP_INT_SIZE * 8).'-bit';
        }
    }
}

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