ImageResize.php
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<?php
namespace backend\components\noam148\imageresize;
use Yii;
use yii\helpers\Url;
use yii\helpers\FileHelper;
use yii\imagine\Image;
use yii\base\Exception;
use Imagine\Image\Box;
use Imagine\Image\ManipulatorInterface;
class ImageResize
{
const IMAGE_OUTBOUND = ManipulatorInterface::THUMBNAIL_OUTBOUND;
const IMAGE_INSET = ManipulatorInterface::THUMBNAIL_INSET;
/** @var string $cachePath path alias relative with webroot where the cache files are kept */
public $cachePath = 'assets/images';
/** @var int $cacheExpire */
public $cacheExpire = 0;
/** @var int $imageQuality */
public $imageQuality = 50;
/** @var int $useFilename if true show filename in url */
public $useFilename = true;
/** @var int $absoluteUrl if true include domain in url */
public $absoluteUrl = false;
/**
* Creates and caches the image thumbnail and returns full path from thumbnail file.
*
* @param string $filePath to original file
* @param integer $width
* @param integer $height
* @param string $mode
* @param integer $quality (1 - 100 quality)
* @param string $chosenFileName (custome filename)
* @return string
* @throws Exception
*/
public function generateImage($filePath, $width, $height, $mode = "outbound", $quality = null, $chosenFileName = null)
{
$filePath = FileHelper::normalizePath(Yii::getAlias($filePath));
if (!is_file($filePath)) {
throw new Exception("File $filePath doesn't exist");
}
//set resize mode
$resizeMode = null;
switch ($mode) {
case "outbound":
$resizeMode = ImageResize::IMAGE_OUTBOUND;
break;
case "inset":
$resizeMode = ImageResize::IMAGE_INSET;
break;
default:
throw new Exception('generateImage $mode is not valid choose for "outbound" or "inset"');
}
//create some vars
$cachePath = Yii::getAlias('@webroot/' . $this->cachePath);
//get fileinfo
$aFileInfo = pathinfo($filePath);
//set default filename
$sFileHash = md5($filePath . $width . $height . $resizeMode . filemtime($filePath));
$imageFileName = null;
//if $this->useFilename set to true? use seo friendly name
if ($this->useFilename === true) {
//set hash and default name
$sFileHashShort = substr($sFileHash, 0, 6);
$sFileName = $aFileInfo['filename'];
//set choosen filename if $chosenFileName not null.
if ($chosenFileName !== null) {
$sFileName = preg_replace('/(\.\w+)$/', '', $chosenFileName);
}
//replace for seo friendly file name
$sFilenameReplace = preg_replace("/[^\w\.\-]+/", '-', $sFileName);
//set filename
$imageFileName = $sFileHashShort . "_" . $sFilenameReplace;
//else use file hash as filename
} else {
$imageFileName = $sFileHash;
}
$imageFileExt = "." . $aFileInfo['extension'];
$imageFilePath = $cachePath . DIRECTORY_SEPARATOR . substr($imageFileName, 0, 2);
$imageFile = $imageFilePath . DIRECTORY_SEPARATOR . $imageFileName . $imageFileExt;
if (file_exists($imageFile)) {
if ($this->cacheExpire !== 0 && (time() - filemtime($imageFile)) > $this->cacheExpire) {
unlink($imageFile);
} else {
return $imageFile;
}
}
//if dir not exist create cache edir
if (!is_dir($imageFilePath)) {
FileHelper::createDirectory($imageFilePath, 0755);
}
//create image
$box = new Box($width, $height);
$image = Image::getImagine()->open($filePath);
$image = $image->thumbnail($box, $resizeMode);
$options = [
'quality' => $quality === null ? $this->imageQuality : $quality
];
$image->save($imageFile, $options);
return $imageFile;
}
/**
* Creates and caches the image and returns URL from resized file.
*
* @param string $filePath to original file
* @param integer $width
* @param integer $height
* @param string $mode
* @param integer $quality (1 - 100 quality)
* @param string $fileName (custome filename)
* @return string
*/
public function getUrl($filePath, $width, $height, $mode = "outbound", $quality = null, $fileName = null)
{
//get original file
$normalizePath = FileHelper::normalizePath(Yii::getAlias($filePath));
//get cache url
$cacheUrl = Yii::getAlias($this->cachePath);
//generate file
$resizedFilePath = self::generateImage($normalizePath, $width, $height, $mode, $quality, $fileName);
//get resized file
$normalizeResizedFilePath = FileHelper::normalizePath($resizedFilePath);
$resizedFileName = pathinfo($normalizeResizedFilePath, PATHINFO_BASENAME);
//get url
$sFileUrl = Url::to('@web/' . $cacheUrl . '/' . substr($resizedFileName, 0, 2) . '/' . $resizedFileName, $this->absoluteUrl);
//return path
return $sFileUrl;
}
/**
* Clear cache directory.
*
* @return bool
*/
public function clearCache()
{
$cachePath = Yii::getAlias('@webroot/' . $this->cachePath);
//remove dir
FileHelper::removeDirectory($cachePath);
//creat dir
return FileHelper::createDirectory($cachePath, 0755);
}
}