Jkphl\Respimgcss\Application\Factory\SourceSizeFactory

Complexity

Total Complexity

10

Size/Duplication

Total Lines	79
Duplicated Lines	0 %

Test Coverage

Coverage

76%

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	parseSourceSizeCalculatedValue()	0	17	3
A	createFromSourceSizeStr()	0	6	1
A	parseSourceSizeValue()	0	20	3
A	getCharacterBalance()	0	3	3

<?php

/**
 * responsive-images-css
 *
 * @category   Jkphl
 * @package    Jkphl\Respimgcss
 * @subpackage Jkphl\Respimgcss\Application\Factory
 * @author     Joschi Kuphal <joschi@tollwerk.de> / @jkphl
 * @copyright  Copyright © 2018 Joschi Kuphal <joschi@tollwerk.de> / @jkphl
 * @license    http://opensource.org/licenses/MIT The MIT License (MIT)
 */

/***********************************************************************************
 *  The MIT License (MIT)
 *
 *  Copyright © 2018 Joschi Kuphal <joschi@kuphal.net> / @jkphl
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of
 *  this software and associated documentation files (the "Software"), to deal in
 *  the Software without restriction, including without limitation the rights to
 *  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 *  the Software, and to permit persons to whom the Software is furnished to do so,
 *  subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 *  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 *  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 *  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ***********************************************************************************/

namespace Jkphl\Respimgcss\Application\Factory;

use Jkphl\Respimgcss\Application\Contract\UnitLengthInterface;
use Jkphl\Respimgcss\Application\Exceptions\InvalidArgumentException;

/**
 * Source size factory
 *
 * @package    Jkphl\Respimgcss
 * @subpackage Jkphl\Respimgcss\Application\Factory
 */
class SourceSizeFactory
{

    public static function createFromSourceSizeStr(string $sourceSizeStr)
    {
        $sourceSizeValue = self::parseSourceSizeValue($sourceSizeStr);
        echo $sourceSizeValue.' / '.$sourceSizeStr.PHP_EOL;

        return 'bla';
    }

    /**
     * Parse the length component
     *
     * @param string $sourceSizeStr Source size string
     *
     * @return UnitLengthInterface Length component
     * @throws InvalidArgumentException If the source size string is ill-formatted
     */
    protected static function parseSourceSizeValue(string &$sourceSizeStr): UnitLengthInterface
    {
        // If the source size string ends with a parenthesis: Try to parse a calc() base length
        if (substr($sourceSizeStr, -1) === ')') {
            return self::parseSourceSizeCalculatedValue($sourceSizeStr);
        }

        // If the source size string is ill-formatted
        if (!preg_match('/^(.*\s+)?([^\s]+)$/', $sourceSizeStr, $sourceSizeStrMatch)) {
            throw new InvalidArgumentException(
                sprintf(InvalidArgumentException::ILL_FORMATTED_SOURCE_SIZE_STRING_STR, $sourceSizeStr),
                InvalidArgumentException::ILL_FORMATTED_SOURCE_SIZE_STRING
            );
        }

        // Post-process the remaining string
        $sourceSizeStr = trim($sourceSizeStrMatch[1]);

        // Return the parsed length
        return LengthFactory::createLengthFromString($sourceSizeStrMatch[2]);
    }

    /**
     * Parse a calc() based length value
     *
     * @param string $sourceSizeStr Source size string
     *
     * @return UnitLengthInterface Length component
     * @throws InvalidArgumentException If the source size string is ill-formatted
     */
    protected static function parseSourceSizeCalculatedValue(string &$sourceSizeStr): UnitLengthInterface
    {
        // Reverse-consume the source size string
        for ($pos = 0, $sourceSizeRev = strrev($sourceSizeStr), $balance = null; $pos < strlen($sourceSizeStr); ++$pos) {
            $balance += self::getCharacterBalance($sourceSizeRev[$pos]);
            if ($balance === 0) {
                $length        = CalcLengthFactory::createFromString(substr($sourceSizeStr, -($pos + 5)));

The assignment to $length is dead and can be removed.

Are you sure the assignment to $length is correct as Jkphl\Respimgcss\Application\Factory\CalcLengthFactory::createFromString(substr($sourceSizeStr, -$pos + 5)) targeting Jkphl\Respimgcss\Application\Factory\CalcLengthFactory::createFromString() seems to always return null.

                $sourceSizeStr = trim(substr($sourceSizeStr, 0, -($pos + 5)));

                return LengthFactory::createLengthFromString('100vw');
            }
        }

        // Else: The source size string is ill-formatted
        throw new InvalidArgumentException(
            sprintf(InvalidArgumentException::ILL_FORMATTED_SOURCE_SIZE_STRING_STR, $sourceSizeStr),
            InvalidArgumentException::ILL_FORMATTED_SOURCE_SIZE_STRING
        );
    }

    /**
     * Return the balance value for a particular value
     *
     * @param string $char Character
     *
     * @return int Balance value
     */
    protected static function getCharacterBalance($char): string
    {
        return ($char === ')') ? 1 : (($char === '(') ? -1 : 0);
    }
}