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Editing: Number.php

<?php

namespace Punic;

/**
 * Numbers helpers.
 */
class Number
{
    /**
     * Check if a variable contains a valid number for the specified locale.
     *
     * @param string $value The string value to check
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return bool
     */
    public static function isNumeric($value, $locale = '')
    {
        return static::unformat($value, $locale) !== null;
    }

/**
     * Check if a variable contains a valid integer number for the specified locale.
     *
     * @param string $value The string value to check
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return bool
     */
    public static function isInteger($value, $locale = '')
    {
        $result = false;
        $number = static::unformat($value, $locale);
        if (is_int($number)) {
            $result = true;
        } elseif (is_float($number)) {
            if ($number === (float) round($number)) {
                $result = true;
            }
        }

return $result;
    }

/**
     * Localize a number representation (for instance, converts 1234.5 to '1,234.5' in case of English and to '1.234,5' in case of Italian).
     *
     * @param int|float|string $value The string value to convert
     * @param int|null $precision The wanted precision (well use {@link http://php.net/manual/function.round.php})
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return string Returns an empty string $value is not a number, otherwise returns the localized representation of the number
     */
    public static function format($value, $precision = null, $locale = '')
    {
        $result = '';
        $number = null;
        if (is_numeric($value)) {
            if (is_string($value) && $precision === null) {
                $precision = self::getPrecision($value);
            }
            $number = (float) $value;
        }
        if ($number !== null) {
            $data = Data::get('numbers', $locale);
            if ($value < 0) {
                $sign = $data['symbols']['minusSign'];
                $number = abs($number);
            } else {
                $sign = '';
            }
            if (is_nan($number)) {
                $result = $data['symbols']['nan'];
            } elseif (is_infinite($number)) {
                $result = $sign . $data['symbols']['infinity'];
            } else {
                $precision = is_numeric($precision) ? (int) $precision : null;
                if ($precision !== null) {
                    $number = round($number, $precision);
                }
                $decimal = $data['symbols']['decimal'];
                $groupLength = (isset($data['groupLength']) && is_numeric($data['groupLength'])) ? (int) $data['groupLength'] : 3;
                $full = explode('.', (string) $number, 2);
                $intPart = $full[0];
                $floatPath = count($full) > 1 ? $full[1] : '';
                $len = strlen($intPart);
                if (($groupLength > 0) && ($len > $groupLength)) {
                    $groupSign = $data['symbols']['group'];
                    $preLength = 1 + (($len - 1) % 3);
                    $pre = substr($intPart, 0, $preLength);
                    $intPart = $pre . $groupSign . implode($groupSign, str_split(substr($intPart, $preLength), $groupLength));
                }
                $result = $sign . $intPart;
                if ($precision === null) {
                    if ($floatPath !== '') {
                        $result .= $decimal . $floatPath;
                    }
                } elseif ($precision > 0) {
                    $result .= $decimal . substr(str_pad($floatPath, $precision, '0', STR_PAD_RIGHT), 0, $precision);
                }
            }
        }

return $result;
    }

/**
     * Localize a percentage (for instance, converts 12.345 to '1,234.5%' in case of English and to '1.234,5 %' in case of Danish).
     *
     * @param int|float|string $value The string value to convert
     * @param int|null $precision The wanted precision (well use {@link http://php.net/manual/function.round.php})
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return string Returns an empty string $value is not a number, otherwise returns the localized representation of the percentage
     */
    public static function formatPercent($value, $precision = null, $locale = '')
    {
        $result = '';
        if (is_numeric($value)) {
            $data = Data::get('numbers', $locale);

if ($precision === null) {
                $precision = self::getPrecision($value);
            }
            $formatted = self::format(100 * abs($value), $precision, $locale);

$format = $data['percentFormats']['standard'][$value >= 0 ? 'positive' : 'negative'];
            $sign = $data['symbols']['percentSign'];

$result = sprintf($format, $formatted, $sign);
        }

return $result;
    }

/**
     * Localize a currency amount (for instance, converts 12.345 to '1,234.5%' in case of English and to '1.234,5 %' in case of Danish).
     *
     * @param int|float|string $value The string value to convert
     * @param string $currencyCode The 3-letter currency code
     * @param string $kind The currency variant, either "standard" or "accounting"
     * @param int|null $precision The wanted precision (well use {@link http://php.net/manual/function.round.php})
     * @param string $which The currency symbol to use, "" for default, "long" for the currency name, "narrow", "alt" for alternative, or "code" for the 3-letter currency code
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return string Returns an empty string $value is not a number, otherwise returns the localized representation of the amount
     */
    public static function formatCurrency($value, $currencyCode, $kind = 'standard', $precision = null, $which = '', $locale = '')
    {
        $result = '';
        if (is_numeric($value)) {
            $data = Data::get('numbers', $locale);
            $data = $data['currencyFormats'];

if ($precision === null) {
                $currencyData = Data::getGeneric('currencyData');
                if (isset($currencyData['fractions'][$currencyCode]['digits'])) {
                    $precision = $currencyData['fractions'][$currencyCode]['digits'];
                } else {
                    $precision = $currencyData['fractionsDefault']['digits'];
                }
            }
            $formatted = self::format(abs($value), $precision, $locale);

if (!isset($data[$kind])) {
                throw new Exception\ValueNotInList($kind, array_keys($data));
            }
            $format = $data[$kind][$value >= 0 ? 'positive' : 'negative'];

$symbol = null;
            switch ($which) {
                case 'long':
                    $value = number_format($value, $precision, '.', '');
                    $symbol = Currency::getName($currencyCode, $value, $locale);
                    break;
                case 'code':
                    $symbol = $currencyCode;
                    break;
                default:
                    $symbol = Currency::getSymbol($currencyCode, $which, $locale);
                    break;
            }
            if (!$symbol) {
                $symbol = $currencyCode;
            }

if ($which === 'long') {
                $pluralRule = 'count-' . Plural::getRuleOfType($value, Plural::RULETYPE_CARDINAL, $locale);
                if (!isset($data['unitPattern'][$pluralRule])) {
                    $pluralRule = 'count-other';
                }
                $unitPattern = $data['unitPattern'][$pluralRule];

$result = sprintf($unitPattern, $formatted, $symbol);
            } else {
                list($before, $after) = explode('%2$s', $format);
                if ($after
                    && preg_match($data['currencySpacing']['afterCurrency']['currency'], $symbol)
                    && preg_match($data['currencySpacing']['afterCurrency']['surrounding'], sprintf($after, $formatted))) {
                    $symbol .= $data['currencySpacing']['afterCurrency']['insertBetween'];
                }
                if ($before
                    && preg_match($data['currencySpacing']['beforeCurrency']['currency'], $symbol)
                    && preg_match($data['currencySpacing']['beforeCurrency']['surrounding'], sprintf($before, $formatted))) {
                    $symbol = $data['currencySpacing']['beforeCurrency']['insertBetween'] . $symbol;
                }

$result = sprintf($format, $formatted, $symbol);
            }
        }

return $result;
    }

/**
     * Convert a localized representation of a number to a number (for instance, converts the string '1,234' to 1234 in case of English and to 1.234 in case of Italian).
     *
     * @param string $value The string value to convert
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return int|float|null Returns null if $value is not valid, the numeric value otherwise
     */
    public static function unformat($value, $locale = '')
    {
        $result = null;
        if (is_int($value) || is_float($value)) {
            $result = $value;
        } elseif (is_string($value) && $value !== '') {
            $data = Data::get('numbers', $locale);
            $plus = $data['symbols']['plusSign'];
            $plusQ = preg_quote($plus);
            $minus = $data['symbols']['minusSign'];
            $minusQ = preg_quote($minus);
            $decimal = $data['symbols']['decimal'];
            $decimalQ = preg_quote($decimal);
            $group = $data['symbols']['group'];
            $groupQ = preg_quote($group);
            $ok = true;
            $m = null;
            if (preg_match('/^' . "({$plusQ}|{$minusQ})?(\\d+(?:{$groupQ}\\d+)*)" . '$/', $value, $m)) {
                $sign = $m[1];
                $int = $m[2];
                $float = null;
            } elseif (preg_match('/^' . "({$plusQ}|{$minusQ})?(\\d+(?:{$groupQ}\\d+)*){$decimalQ}" . '$/', $value, $m)) {
                $sign = $m[1];
                $int = $m[2];
                $float = '';
            } elseif (preg_match('/^' . "({$plusQ}|{$minusQ})?(\\d+(?:{$groupQ}\\d+)*){$decimalQ}(\\d+)" . '$/', $value, $m)) {
                $sign = $m[1];
                $int = $m[2];
                $float = $m[3];
            } elseif (preg_match('/^' . "({$plusQ}|{$minusQ})?{$decimalQ}(\\d+)" . '$/', $value, $m)) {
                $sign = $m[1];
                $int = '0';
                $float = $m[2];
            } else {
                $ok = false;
                $float = $int = $sign = null;
            }
            if ($ok) {
                if ($sign === $minus) {
                    $sign = '-';
                } else {
                    $sign = '';
                }
                $int = str_replace($group, '', $int);
                if ($float === null) {
                    $result = (int) "{$sign}{$int}";
                } else {
                    $result = (float) "{$sign}{$int}.{$float}";
                }
            }
        }

return $result;
    }

/**
     * Spell out a number (e.g. "one hundred twenty-three" or "twenty-third") or convert to a different numbering system, e.g Roman numerals.
     *
     * Some types are language-dependent and reflect e.g. gender and case. Refer to the CLDR XML source for supported types.
     *
     * Available numbering systems are specified in the "root" locale.
     *
     * @param int|float|string $value The value to localize/spell out
     * @param string $type The format type, e.g. "spellout-numbering", "spellout-numbering-year", "spellout-cardinal", "digits-ordinal", "roman-upper".
     * @param string $locale The locale to use. If empty we'll use the default locale set in \Punic\Data
     *
     * @return string The spelled number
     *
     * @see https://www.unicode.org/repos/cldr/trunk/common/rbnf/
     * @see https://www.unicode.org/repos/cldr/trunk/common/rbnf/root.xml
     */
    public static function spellOut($value, $type, $locale)
    {
        return self::formatRbnf($value, $type, null, $locale);
    }

/**
     * This method should not be called from outside this class.
     *
     * It is declared public for compatibility with PHP 5.3.
     *
     * @param int|float|string $value
     * @param string $type
     * @param int $base
     * @param string $locale
     *
     * @internal
     */
    public static function formatRbnf($value, $type, $base, $locale)
    {
        $data = Data::get('rbnf', $locale);
        if (!isset($data[$type])) {
            $data += Data::get('rbnf', 'root', true);
        }
        if (!isset($data[$type])) {
            throw new Exception\ValueNotInList($type, array_keys($data));
        }
        $data = $data[$type];

list($rule, $left, $right, $prevBase) = self::getRbnfRule($value, $data, $base);

return preg_replace_callback('/([<←>→=])(.*?)\1\1?|\$$(.*?),(.*?)$\$/u', function ($match) use ($value, $left, $right, $type, $prevBase, $locale) {
            if (isset($match[4])) {
                $rule = Plural::getRuleOfType($left, $match[3] ? $match[3] : Plural::RULETYPE_CARDINAL, $locale);
                $match2 = null;
                if (preg_match('/' . $rule . '{(.*?)}/', $match[4], $match2)) {
                    return $match2[1];
                }
            } else {
                $base = null;
                if ($match[2]) {
                    if ($match[2][0] !== '%') {
                        $i = strpos($match[2], '.');
                        if ($i === false) {
                            $precision = 0;
                        } elseif ($match[2][$i + 1] === '#') {
                            $precision = null;
                        } else {
                            $precision = strspn($match[2], '0', $i + 1);
                        }

return Number::format($value, $precision, $locale);
                    }
                    $type = substr($match[2], 1);
                }

switch ($match[1]) {
                    case '=':
                        break;
                    case '<':
                    case '←':
                        $value = $left;
                        break;
                    case '>':
                    case '→':
                        $value = $right;
                        if ($match[0] == '>>>' || $match[0] == '→→→') {
                            $base = $prevBase;
                        }
                        break;
                }

return implode(' ', array_map(function ($v) use ($type, $base, $locale) {
                    return Number::formatRbnf($v, $type, $base, $locale);
                }, (array) $value));
            }
        }, $rule);
    }

protected static function getRbnfRule($value, $data, $base = null)
    {
        $left = 0;
        $right = 0;
        $prevBase = 0;
        if (!is_numeric($value)) {
            $rule = '';
        } elseif (is_nan($value) && isset($data['NaN'])) {
            $rule = $data['NaN']['rule'];
        } elseif ($value < 0) {
            $right = -$value;
            $rule = $data['-x']['rule'];
        } elseif (is_infinite($value) && isset($data['Inf'])) {
            $rule = $data['Inf']['rule'];
        } elseif (strpos($value, '.') !== false && isset($data['x.x'])) {
            list($left, $right) = explode('.', $value);
            $right = str_split($right);
            if ($left == 0 && isset($data['0.x'])) {
                $rule = $data['0.x']['rule'];
            } else {
                $rule = $data['x.x']['rule'];
            }
        } else {
            $bases = array_keys($data['integer']);
            if ($base) {
                $i = array_search($base, $bases);
            } else {
                for ($i = count($bases) - 1; $i >= 0; $i--) {
                    $base = $bases[$i];
                    if ($base <= $value) {
                        break;
                    }
                }
            }
            $prevBase = $i > 0 ? $bases[$i - 1] : null;

$r = $data['integer'][$base] + array('radix' => 10);
            $rule = $r['rule'];
            $radix = $r['radix'];

// Add .5 to avoid floating-point rounding error in PHP 5. $base is
            // an integer, so adding a number < 1 will not break anything.
            $divisor = pow($radix, floor(abs(log($base + .5, $radix))));

$right = fmod($value, $divisor);
            $left = floor($value / $divisor);

if ($right) {
                $rule = str_replace(array('[', ']'), '', $rule);
            } else {
                $rule = preg_replace('/\[.*?\]/', '', $rule);
            }
        }

return array($rule, $left, $right, $prevBase);
    }

private static function getPrecision($value)
    {
        $precision = null;
        if (is_string($value)) {
            $i = strrpos($value, '.');
            if ($i !== false) {
                $precision = strlen($value) - $i - 1;
            }
        }

return $precision;
    }
}

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