Passed
Push — master ( fd02cc...3eb95c )
by Daniel
02:03
created

Formatter::assertString()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 3
CRAP Score 2

Importance

Changes 0
Metric Value
cc 2
eloc 2
nc 2
nop 1
dl 0
loc 4
rs 10
c 0
b 0
f 0
ccs 3
cts 3
cp 1
crap 2
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<?php declare(strict_types=1);
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/**
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 * This file is part of the Csv-Machine package.
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 *
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 * (c) Dan McAdams <[email protected]>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace RoadBunch\Csv\Formatter;
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use RoadBunch\Csv\Exception\FormatterResultException;
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/**
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 * Class Formatter
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 *
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 * @author  Dan McAdams
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 * @package RoadBunch\Csv\Formatter
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 */
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class Formatter implements FormatterInterface
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{
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    /** @var callable */
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    protected $callback;
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    /**
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     * Formatter constructor.
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     *
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     * @param callable $callback
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     */
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    public function __construct(callable $callback)
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    {
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        $this->callback = $callback;
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    }
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    /**
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     * @param array $data an array of strings to be formatted
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     *
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     * @return array
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     * @throws \InvalidArgumentException|FormatterResultException
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     */
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    public function format(array $data): array
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    {
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        $formatted = [];
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        foreach ($data as $element) {
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            // assert element to format is string
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            $this->assertString($element);
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            // assert resulting element is string
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            $this->assertResultString($formattedElement = call_user_func($this->callback, $element));
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            $formatted[] = $formattedElement;
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        }
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        return $formatted;
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    }
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    /**
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     * @param $value
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     * @throws \InvalidArgumentException
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     */
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    protected function assertString($value)
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    {
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        if (!is_string($value)) {
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            throw new \InvalidArgumentException('All elements of the array must be strings');
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        }
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    }
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    /**
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     * @param $result
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     * @throws FormatterResultException
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     */
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    protected function assertResultString($result)
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    {
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        if (!is_string($result)) {
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            throw new FormatterResultException('Formatter must result in an array of strings');
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        }
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    }
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}
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