StringFormatter/src/PlaceholderFormatter.php at ad98587a4b79188036c7f4e30685c803e2b2d0f5 · henriquemoody/StringFormatter · GitHub

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<?php

/*
 * SPDX-FileCopyrightText: (c) Respect Project Contributors
 * SPDX-License-Identifier: ISC
 * SPDX-FileContributor: Henrique Moody <henriquemoody@gmail.com>
 */

declare(strict_types=1);

namespace Respect\StringFormatter;

use Respect\StringFormatter\Modifiers\FormatterModifier;
use Respect\StringFormatter\Modifiers\ListModifier;
use Respect\StringFormatter\Modifiers\StringifyModifier;
use Respect\StringFormatter\Modifiers\StringPassthroughModifier;
use Respect\StringFormatter\Modifiers\TransModifier;

use function array_key_exists;
use function preg_replace_callback;
use function preg_split;

final readonly class PlaceholderFormatter implements Formatter
{
    /** @param array<string, mixed> $parameters */
    public function __construct(
        private array $parameters,
        private Modifier $modifier = new TransModifier(
            new ListModifier(
                new FormatterModifier(new StringPassthroughModifier(new StringifyModifier())),
            ),
        ),
    ) {
    }

    public function format(string $input): string
    {
        return $this->formatUsingParameters($input, $this->parameters);
    }

    /** @param array<string, mixed> $parameters */
    public function formatUsing(string $input, array $parameters): string
    {
        return $this->formatUsingParameters($input, $this->parameters + $parameters);
    }

    /** @param array<string, mixed> $parameters */
    private function formatUsingParameters(string $input, array $parameters): string
    {
        return (string) preg_replace_callback(
            '/{{(\w+)(\|([^}\\\\]*(?:\\\\.[^}\\\\]*)*))?}}/',
            fn(array $matches) => $this->processPlaceholder($matches, $parameters),
            $input,
        );
    }

    /**
     * @param array<int, string> $matches
     * @param array<string, mixed> $parameters
     */
    private function processPlaceholder(array $matches, array $parameters): string
    {
        $placeholder = $matches[0] ?? '';
        $name = $matches[1] ?? '';
        $pipe = $matches[3] ?? null;

        if (!array_key_exists($name, $parameters)) {
            return $placeholder;
        }

        $value = $parameters[$name];
        if ($pipe === null) {
            return $this->modifier->modify($value, null);
        }

        $pipes = preg_split('/(?<!\\\\)\|/', $pipe) ?: [];
        foreach ($pipes as $pipe) {
            $value = $this->modifier->modify($value, $pipe);
        }

        /** @phpstan-ignore return.type */
        return $value;
    }
}