File NumberPatternParser.php | ICanBoogie/CLDR master

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<?php

/*
 * This file is part of the ICanBoogie package.
 *
 * (c) Olivier Laviale <olivier.laviale@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ICanBoogie\CLDR;

class NumberPatternParser
{
    const PATTERN_REGEX = '/^(.*?)[#,\.0]+(.*?)$/';

    static private $initial_format = [

        'positive_prefix' => '',
        'positive_suffix' => '',
        'negative_prefix' => '',
        'negative_suffix' => '',
        'multiplier' => 1,
        'decimal_digits' => 0,
        'max_decimal_digits' => 0,
        'integer_digits' => 0,
        'group_size1' => 0,
        'group_size2' => 0

    ];

    /**
     * Parses a given string pattern.
     *
     * @param string $pattern The pattern to be parsed.
     *
     * @return array The parsed pattern.
     */
    static public function parse($pattern)
    {
        $format = self::$initial_format;

        self::parse_multiple_patterns($pattern, $format);
        self::parse_multiplier($pattern, $format);
        self::parse_decimal_part($pattern, $format);
        self::parse_integer_part($pattern, $format);
        self::parse_group_sizes($pattern, $format);

        return $format;
    }

    /**
     * @param string $pattern
     * @param array $format
     */
    static private function parse_multiple_patterns(&$pattern, array &$format)
    {
        $patterns = explode(';', $pattern);

        if (preg_match(self::PATTERN_REGEX, $patterns[0], $matches))
        {
            $format['positive_prefix'] = $matches[1];
            $format['positive_suffix'] = $matches[2];
        }

        if (isset($patterns[1]) && preg_match(self::PATTERN_REGEX, $patterns[1], $matches))
        {
            $format['negative_prefix'] = $matches[1];
            $format['negative_suffix'] = $matches[2];
        }
        else
        {
            $format['negative_prefix'] = '-' . $format['positive_prefix'];
            $format['negative_suffix'] = $format['positive_suffix'];
        }

        $pattern = $patterns[0];
    }

    /**
     * @param string $pattern
     * @param array $format
     */
    static private function parse_multiplier(&$pattern, array &$format)
    {
        if (strpos($pattern, '%') !== false)
        {
            $format['multiplier'] = 100;
        }
        else
        {
            if (strpos($pattern, '‰') !== false)
            {
                $format['multiplier'] = 1000;
            }
        }
    }

    /**
     * @param string $pattern
     * @param array $format
     */
    static private function parse_decimal_part(&$pattern, array &$format)
    {
        $pos = strpos($pattern, '.');

        if ($pos !== false)
        {
            $pos2 = strrpos($pattern, '0');
            $format['decimal_digits'] = $pos2 > $pos
                ? $pos2 - $pos
                : 0;

            $pos3 = strrpos($pattern, '#');
            $format['max_decimal_digits'] = $pos3 >= $pos2
                ? $pos3 - $pos
                : $format['decimal_digits'];

            $pattern = substr($pattern, 0, $pos);
        }

    }

    /**
     * @param string $pattern
     * @param array $format
     */
    static private function parse_integer_part(&$pattern, array &$format)
    {
        $p = str_replace(',', '', $pattern);
        $pos = strpos($p, '0');

        $format['integer_digits'] = $pos !== false
            ? strrpos($p, '0') - $pos + 1
            : 0;
    }

    /**
     * @param string $pattern
     * @param array $format
     */
    static private function parse_group_sizes(&$pattern, array &$format)
    {
        $p = str_replace('#', '0', $pattern);
        $pos = strrpos($pattern, ',');

        if ($pos !== false)
        {
            $pos2 = strrpos(substr($p, 0, $pos), ',');
            $format['group_size1'] = strrpos($p, '0') - $pos;
            $format['group_size2'] = $pos2 !== false ? $pos - $pos2 - 1 : 0;
        }
    }
}

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