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<?php
namespace backend\components;
use yii\web\UploadedFile;
use backend\models\ImageSizerForm;
use yii\base\Widget;
use Imagine\Image\Box;
use yii\imagine\Image;
use Yii;
use Imagine\Gd\Imagine;
class ImgResizer extends Widget
{
public $height;
public $width;
public function init(){
parent::init();
}
public function run(){
$model = new ImageSizerForm();
$request = Yii::$app->request->post();
if ($request) {
if(isset($request['old_img'])){
$this->deleteImages($request['old_img']);
}
$model->file = UploadedFile::getInstance($model, 'file');
$md5_file = md5_file($model->file->tempName);
$imgDir = Yii::getAlias('@storage/'.$md5_file.'/');
$imageOrigAlias = Yii::getAlias($imgDir.'original'.'.'.$model->file->extension);
if(!is_dir($imgDir)) {
mkdir($imgDir, 0755, true);
}
$model->file->saveAs($imageOrigAlias);
if($request['width'] && $request['height']){
$imageAlias = Yii::getAlias($imgDir.$request['width'].'x'.$request['height'].'.'.$model->file->extension);
$imageLink = '/storage/'.$md5_file.'/'.$request['width'].'x'.$request['height'].'.'.$model->file->extension;
$this->resizeImg($request['width'],$request['height'], $imageOrigAlias,$imageAlias);
} else {
$imageLink = '/storage/'.$md5_file.'/'.'original'.'.'.$model->file->extension;
}
if($model->multi){
// $view = $this->renderPartial('@app/components/views/_gallery_item', [
// 'item' => ['image'=>$imageLink],
// ]);
//
// return json_encode(['link'=>$imageLink, 'view' =>$view]);
} else {
$p1[0] = "<img style='height:160px' src='$imageLink' class='file-preview-image'>";
return json_encode(['success','initialPreview' => $p1, 'append' => false, 'name' =>$imageLink,]);
}
} else {
return json_encode(['error']);
}
}
public function isBigger($width,$height,$w,$h)
{
if($width>$w){
return true;
}else if($height >$h) {
return true;
}
return false;
}
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public function resizeImg($w, $h, $imageAlias,$imageAliasSave)
{
$img = Image::getImagine()->open(Yii::getAlias($imageAlias));
$size = $img->getSize();
$width = $size->getWidth();
$height = $size->getHeight();
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$e_width = $w/$h;
$e_height = $h/$w;
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$e1_width = $width/$height;
$e1_height = $height/$width;
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if($this->isBigger($width,$height,$w,$h)){
if($e_width<$e1_width){
$new_width = $width*($e_width/$e1_width);
$width = $new_width;
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}else {
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$new_height = $height*($e_height/$e1_height);
$height = $new_height;
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}
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} else {
$img->save($imageAliasSave, array('flatten' => false));
return true;
}
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Image::crop($imageAlias, $width, $height,[0,0])
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->save(Yii::getAlias($imageAliasSave), ['quality' =>
100]);
$imagine = new Imagine();
$imagine->open($imageAliasSave)
->resize(new Box($w, $h))
->save($imageAliasSave, array('flatten' => false));
}
private function deleteImages($old_img){
if(!empty($old_img) && file_exists($_SERVER['DOCUMENT_ROOT'].$old_img)){
$rootDir = explode("/", $old_img);
$row = $_SERVER['DOCUMENT_ROOT'].'/'.$rootDir[1].'/'.$rootDir[2].'/';
$allFiles = scandir($row);
$allFiles = array_slice($allFiles, 2);
foreach($allFiles as $oldFile){
unlink($row.$oldFile);
}
}
}
public function actionDeleteImage(){
$old_img = Yii::$app->request->post('old_img');
if ($old_img) {
$this->deleteImages($old_img);
}
}
}
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