ew_base/Classes/Services/Tailwindcss4Merger.php

<?php

declare(strict_types=1);

/*
 * This file is developed by evoWeb.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 */

namespace Evoweb\EwBase\Services;

class Tailwindcss4Merger
{
    public function cssUnique(string $styles): string
    {
        $atLayerOrder = $this->getLayerOrder($styles);
        $atLayerBase = $this->getLayerBase($styles);
        $atLayerTheme = $this->getLayerTheme($styles);
        $atLayerUtilities = $this->getLayerUtilities($styles);
        $atLayerComponents = $this->getLayerComponents($styles);
        $atProperty = $this->getProperties($styles);
        $atLayerProperties = $this->getLayerProperties($styles);
        return implode(chr(10), [
            $atLayerOrder,
            $atLayerBase,
            $atLayerTheme,
            $atLayerUtilities,
            $atLayerComponents,
            $atProperty,
            $atLayerProperties,
        ]);
    }

    protected function getLayerOrder(string $styles): string
    {
        preg_match_all('/(?<layer>@layer[^;{]+;)/i', $styles, $matches);
        return implode(chr(10), array_unique($matches['layer'] ?? []));
    }

    protected function getLayerBase(string $styles): string
    {
        $matches = $this->getLayerByName($styles, 'base');
        $base = [];
        foreach ($matches as $match) {
            $match = $this->unwrapLayer($match, 'base');
            $match = preg_replace('/}\n *\./', "}\n||.", $match);
            $match = preg_replace('/}\n\W*@/', "}\n||@", $match);
            $parts = explode('||', $match);
            $base = array_merge($base, $parts);
        }
        return $this->wrapLayer('base', array_unique($base));
    }

    protected function getLayerTheme(string $styles): string
    {
        $matches = $this->getLayerByName($styles, 'theme');
        $themes = [];
        foreach ($matches as $match) {
            preg_match_all('/(?<theme>--[^;]+;)/i', $match, $subMatches);
            $themes = array_merge($themes, $subMatches['theme'] ?? []);
        }
        return '@layer theme {
  :root, :host {'
            . chr(10)
            . implode(chr(10), array_unique($themes))
            . chr(10)
            . '  }
}';
    }

    protected function getLayerUtilities(string $styles): string
    {
        $matches = $this->getLayerByName($styles, 'utilities');
        $utilities = [];
        foreach ($matches as $match) {
            $match = $this->unwrapLayer($match, 'utilities');
            $match = preg_replace('/}\n *\./', "}\n||.", $match);
            $parts = explode('||', $match);
            $utilities = array_merge($utilities, $parts);
        }
        return $this->wrapLayer('utilities', array_unique($utilities));
    }

    protected function getLayerComponents(string $styles): string
    {
        $matches = $this->getLayerByName($styles, 'components');
        $components = [];
        foreach ($matches as $match) {
            $match = $this->unwrapLayer($match, 'components');
            $match = preg_replace('/}\n *\./', "}\n||.", $match);
            $parts = explode('||', $match);
            $components = array_merge($components, $parts);
        }
        return $this->wrapLayer('components', array_unique($components));
    }

    protected function getLayerByName(string $styles, string $name): array
    {
        preg_match_all('/@layer[^{;]+\{.+?(?=\n})\n}/s', $styles, $matches);
        $layer = [];
        foreach ($matches['0'] as $match) {
            if (str_starts_with($match, '@layer ' . $name) !== false) {
                $layer[] = $match;
            }
        }
        return $layer;
    }

    protected function getProperties(string $styles): string
    {
        preg_match_all('/(?<property>@property[^{]+\{[^}]+})/i', $styles, $matches);
        return implode(chr(10), array_unique($matches['property'] ?? []));
    }

    protected function getLayerProperties(string $styles): string
    {
        $matches = $this->getLayerByName($styles, 'properties');
        $properties = [
            '  @supports ((-webkit-hyphens: none) and (not (margin-trim: inline))) or ((-moz-orient: inline) and (not (color:rgb(from red r g b)))) {
    *, ::before, ::after, ::backdrop {'
        ];
        foreach ($matches as $match) {
            preg_match_all('/(?<properties>--tw[^ ]+: [^;]+;)/i', $match, $subMatches);
            $properties = array_merge($properties, $subMatches['properties']);
        }
        $properties = array_unique($properties);
        $properties[] = '    }
  }';
        return $this->wrapLayer('properties', $properties);
    }

    protected function unwrapLayer(string $styles, string $name): string
    {
        return trim(str_replace('@layer ' . $name . ' {', '', substr($styles, 0, -1)));
    }

    protected function wrapLayer(string $name, array $styles): string
    {
        return '@layer ' . $name . " {\n" . implode("\n", $styles) . "\n}";
    }
}