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<?php

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/**

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* fast-image-size base class

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* @package fast-image-size

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* @copyright (c) Marc Alexander <admin@m-a-styles.de>

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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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namespace Nextend\Framework\FastImageSize;

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use Nextend\Framework\Pattern\SingletonTrait;

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use Nextend\Framework\ResourceTranslator\ResourceTranslator;

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class FastImageSize {

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use SingletonTrait;

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private static $cache = array();

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/**

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* @param string $image

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* @param array $attributes

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public static function initAttributes($image, &$attributes) {

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$size = self::getSize($image);

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if ($size) {

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$attributes['width'] = $size['width'];

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$attributes['height'] = $size['height'];

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}

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}

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public static function getWidth($image) {

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$size = self::getSize($image);

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if ($size) {

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return $size['width'];

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}

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return 0;

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}

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public static function getSize($image) {

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$imagePath = ResourceTranslator::toPath($image);

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if (!isset(self::$cache[$imagePath])) {

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if (empty($imagePath)) {

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self::$cache[$imagePath] = false;

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} else {

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self::$cache[$imagePath] = self::getInstance()

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->getImageSize($imagePath);

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}

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}

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return self::$cache[$imagePath];

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}

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/** @var array Size info that is returned */

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protected $size = array();

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/** @var string Data retrieved from remote */

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protected $data = '';

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/** @var array List of supported image types and associated image types */

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protected $supportedTypes = array(

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'png' => array('png'),

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'gif' => array('gif'),

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'jpeg' => array(

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'jpeg',

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'jpg'

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'webp' => array(

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'webp',

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'svg' => array(

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'svg',

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)

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);

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/** @var array Class map that links image extensions/mime types to class */

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protected $classMap;

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/** @var array An array containing the classes of supported image types */

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protected $type;

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/**

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* Get image dimensions of supplied image

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* @param string $file Path to image that should be checked

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* @param string $type Mimetype of image

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* @return array|bool Array with image dimensions if successful, false if not

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public function getImageSize($file, $type = '') {

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// Reset values

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$this->resetValues();

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// Treat image type as unknown if extension or mime type is unknown

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if (!preg_match('/\.([a-z0-9]+)$/i', $file, $match) && empty($type)) {

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$this->getImagesizeUnknownType($file);

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} else {

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$extension = (empty($type) && isset($match[1])) ? $match[1] : preg_replace('/.+\/([a-z0-9-.]+)$/i', '$1', $type);

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$this->getImageSizeByExtension($file, $extension);

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}

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return sizeof($this->size) > 1 ? $this->size : false;

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}

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/**

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* Get dimensions of image if type is unknown

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* @param string $filename Path to file

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protected function getImagesizeUnknownType($filename) {

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// Grab the maximum amount of bytes we might need

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$data = $this->getImage($filename, 0, Type\TypeJpeg::JPEG_MAX_HEADER_SIZE, false);

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if ($data !== false) {

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$this->loadAllTypes();

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foreach ($this->type as $imageType) {

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$imageType->getSize($filename);

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if (sizeof($this->size) > 1) {

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break;

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}

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}

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}

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}

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/**

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* Get image size by file extension

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* @param string $file Path to image that should be checked

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* @param string $extension Extension/type of image

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protected function getImageSizeByExtension($file, $extension) {

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$extension = strtolower($extension);

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$this->loadExtension($extension);

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if (isset($this->classMap[$extension])) {

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$this->classMap[$extension]->getSize($file);

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}

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}

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/**

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* Reset values to default

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protected function resetValues() {

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$this->size = array();

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$this->data = '';

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}

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/**

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* Set mime type based on supplied image

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* @param int $type Type of image

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public function setImageType($type) {

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$this->size['type'] = $type;

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}

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/**

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* Set size info

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* @param array $size Array containing size info for image

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public function setSize($size) {

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$this->size = $size;

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}

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/**

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* Get image from specified path/source

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* @param string $filename Path to image

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* @param int $offset Offset at which reading of the image should start

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* @param int $length Maximum length that should be read

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* @param bool $forceLength True if the length needs to be the specified

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* length, false if not. Default: true

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* @return false|string Image data or false if result was empty

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public function getImage($filename, $offset, $length, $forceLength = true) {

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if (empty($this->data)) {

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$this->data = @file_get_contents($filename, false, null, $offset, $length);

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}

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// Force length to expected one. Return false if data length

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// is smaller than expected length

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if ($forceLength === true) {

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return (strlen($this->data) < $length) ? false : substr($this->data, $offset, $length);

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}

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return empty($this->data) ? false : $this->data;

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}

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/**

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* Get return data

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* @return array|bool Size array if dimensions could be found, false if not

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protected function getReturnData() {

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return sizeof($this->size) > 1 ? $this->size : false;

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}

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/**

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* Load all supported types

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protected function loadAllTypes() {

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foreach ($this->supportedTypes as $imageType => $extension) {

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$this->loadType($imageType);

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}

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}

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/**

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* Load an image type by extension

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* @param string $extension Extension of image

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protected function loadExtension($extension) {

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if (isset($this->classMap[$extension])) {

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return;

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}

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foreach ($this->supportedTypes as $imageType => $extensions) {

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if (in_array($extension, $extensions, true)) {

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$this->loadType($imageType);

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}

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}

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}

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/**

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* Load an image type

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* @param string $imageType Mimetype

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protected function loadType($imageType) {

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if (isset($this->type[$imageType])) {

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return;

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}

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$className = '\\' . __NAMESPACE__ . '\Type\Type' . ucfirst($imageType);

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$this->type[$imageType] = new $className($this);

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// Create class map

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foreach ($this->supportedTypes[$imageType] as $ext) {

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/** @var Type\TypeInterface */

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$this->classMap[$ext] = $this->type[$imageType];

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}

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}

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}

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