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Cecilapp / Cecil / 14532758805

18 Apr 2025 09:06AM UTC coverage: 83.633%. First build
14532758805

Pull #2148

github

web-flow
Merge 004f11f49 into bc7c717e4
Pull Request #2148: refactor: configuration and cache

315 of 376 new or added lines in 26 files covered. (83.78%)

3025 of 3617 relevant lines covered (83.63%)

0.84 hits per line

Source File
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81.08
/src/Assets/Image.php
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<?php
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declare(strict_types=1);
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/*
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 * This file is part of Cecil.
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 *
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 * Copyright (c) Arnaud Ligny <arnaud@ligny.fr>
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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 Cecil\Assets;
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use Cecil\Exception\RuntimeException;
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use Intervention\Image\Drivers\Gd\Driver as GdDriver;
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use Intervention\Image\Drivers\Imagick\Driver as ImagickDriver;
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use Intervention\Image\Encoders\AutoEncoder;
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use Intervention\Image\ImageManager;
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class Image
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{
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    /**
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     * Create new manager instance with available driver.
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     */
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    private static function manager(): ImageManager
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    {
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        $driver = null;
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        // ImageMagick is available? (for a future quality option)
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        if (\extension_loaded('imagick') && class_exists('Imagick')) {
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            $driver = ImagickDriver::class;
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        }
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        // Use GD, because it's the faster driver
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        if (\extension_loaded('gd') && \function_exists('gd_info')) {
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            $driver = GdDriver::class;
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        }
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        if ($driver) {
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            return ImageManager::withDriver(
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                $driver,
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                [
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                    'autoOrientation' => true,
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                    'decodeAnimation' => true,
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                    'blendingColor' => 'ffffff',
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                    'strip' => true, // remove metadata
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                ]
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            );
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        }
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        throw new RuntimeException('PHP GD (or Imagick) extension is required.');
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    }
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    /**
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     * Resize an image Asset.
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     *
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     * @throws RuntimeException
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     */
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    public static function resize(Asset $asset, int $width, int $quality): string
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    {
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        try {
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            // creates image object from source
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            $image = self::manager()->read($asset['content']);
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            // resizes to $width with constraint the aspect-ratio and unwanted upsizing
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            $image->scaleDown(width: $width);
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            // return image data
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            return (string) $image->encodeByMediaType($asset['subtype'], /** @scrutinizer ignore-type */ progressive: true, /** @scrutinizer ignore-type */ interlaced: false, quality: $quality);
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        } catch (\Exception $e) {
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            throw new RuntimeException(\sprintf('Asset "%s" can\'t be resized: %s', $asset['path'], $e->getMessage()));
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        }
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    }
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    /**
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     * Converts an image Asset to the target format.
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     *
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     * @throws RuntimeException
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     */
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    public static function convert(Asset $asset, string $format, int $quality): string
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    {
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        try {
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            $image = self::manager()->read($asset['content']);
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            if (!\function_exists("image$format")) {
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                throw new RuntimeException(\sprintf('Function "image%s" is not available.', $format));
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            }
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            return (string) $image->encodeByExtension($format, /** @scrutinizer ignore-type */ progressive: true, /** @scrutinizer ignore-type */ interlaced: false, quality: $quality);
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        } catch (\Exception $e) {
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            throw new RuntimeException(\sprintf('Not able to convert "%s" to %s: %s', $asset['path'], $format, $e->getMessage()));
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        }
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    }
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    /**
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     * Returns the Data URL (encoded in Base64).
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     *
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     * @throws RuntimeException
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     */
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    public static function getDataUrl(Asset $asset, int $quality): string
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    {
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        try {
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            $image = self::manager()->read($asset['content']);
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            return (string) $image->encode(new AutoEncoder(quality: $quality))->toDataUri();
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        } catch (\Exception $e) {
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            throw new RuntimeException(\sprintf('Can\'t get Data URL of "%s": %s', $asset['path'], $e->getMessage()));
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        }
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    }
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    /**
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     * Returns the dominant RGB color of an image asset.
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     *
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     * @throws RuntimeException
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     */
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    public static function getDominantColor(Asset $asset): string
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    {
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        try {
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            $image = self::manager()->read(self::resize($asset, 100, 50));
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            return $image->reduceColors(1)->pickColor(0, 0)->toString();
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        } catch (\Exception $e) {
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            throw new RuntimeException(\sprintf('Can\'t get dominant color of "%s": %s', $asset['path'], $e->getMessage()));
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        }
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    }
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    /**
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     * Returns a Low Quality Image Placeholder (LQIP) as data URL.
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     *
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     * @throws RuntimeException
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     */
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    public static function getLqip(Asset $asset): string
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    {
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        try {
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            $image = self::manager()->read(self::resize($asset, 100, 50));
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            return (string) $image->blur(50)->encode()->toDataUri();
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        } catch (\Exception $e) {
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            throw new RuntimeException(\sprintf('can\'t create LQIP of "%s": %s', $asset['path'], $e->getMessage()));
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        }
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    }
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    /**
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     * Build the `srcset` attribute for responsive images.
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     * e.g.: `srcset="/img-480.jpg 480w, /img-800.jpg 800w"`.
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     *
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     * @throws RuntimeException
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     */
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    public static function buildSrcset(Asset $asset, array $widths): string
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    {
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        if (!self::isImage($asset)) {
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            throw new RuntimeException(\sprintf('can\'t build "srcset" of "%s": it\'s not an image file.', $asset['path']));
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        }
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        $srcset = '';
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        $widthMax = 0;
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        sort($widths, SORT_NUMERIC);
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        $widths = array_reverse($widths);
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        foreach ($widths as $width) {
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            if ($asset['width'] < $width) {
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                continue;
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            }
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            $img = $asset->resize($width);
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            $srcset .= \sprintf('%s %sw, ', (string) $img, $width);
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            $widthMax = $width;
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        }
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        // adds source image
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        if (!empty($srcset) && ($asset['width'] < max($widths) && $asset['width'] != $widthMax)) {
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            $srcset .= \sprintf('%s %sw', (string) $asset, $asset['width']);
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        }
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        return rtrim($srcset, ', ');
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    }
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    /**
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     * Returns the value of the "sizes" attribute corresponding to the configured class.
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     */
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    public static function getSizes(string $class, array $sizes = []): string
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    {
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        $result = '';
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        $classArray = explode(' ', $class);
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        foreach ($classArray as $class) {
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            if (\array_key_exists($class, $sizes)) {
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                $result = $sizes[$class] . ', ';
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            }
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        }
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        if (!empty($result)) {
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            return trim($result, ', ');
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        }
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        return $sizes['default'] ?? '100vw';
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    }
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    /**
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     * Checks if an asset is an animated GIF.
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     */
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    public static function isAnimatedGif(Asset $asset): bool
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    {
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        // an animated GIF contains multiple "frames", with each frame having a header made up of:
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        // 1. a static 4-byte sequence (\x00\x21\xF9\x04)
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        // 2. 4 variable bytes
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        // 3. a static 2-byte sequence (\x00\x2C)
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        $count = preg_match_all('#\x00\x21\xF9\x04.{4}\x00[\x2C\x21]#s', (string) $asset['content']);
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        return $count > 1;
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    }
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    /**
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     * Returns true if asset is a SVG.
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     */
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    public static function isSVG(Asset $asset): bool
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    {
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        return \in_array($asset['subtype'], ['image/svg', 'image/svg+xml']) || $asset['ext'] == 'svg';
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    }
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    /**
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     * Returns true if asset is an ICO.
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     */
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    public static function isIco(Asset $asset): bool
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    {
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        return \in_array($asset['subtype'], ['image/x-icon', 'image/vnd.microsoft.icon']) || $asset['ext'] == 'ico';
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    }
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    /**
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     * Asset is a valid image?
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     */
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    public static function isImage(Asset $asset): bool
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    {
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        if ($asset['type'] !== 'image' || self::isSVG($asset) || self::isIco($asset)) {
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            return false;
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        }
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        return true;
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    }
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    /**
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     * Returns SVG attributes.
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     *
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     * @return \SimpleXMLElement|false
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     */
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    public static function getSvgAttributes(Asset $asset)
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    {
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        if (!self::isSVG($asset)) {
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            return false;
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        }
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        if (false === $xml = simplexml_load_string($asset['content'] ?? '')) {
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            return false;
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        }
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        return $xml->attributes();
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    }
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}
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