Humhub: Reduce filesize of attached image.

Reduce.php

<?php

/*

# Reduce filesize of attached image.

- for X or Y axis: 1024px max
- compress into Jpeg on q=90

## Usage

1. Place me on `/protected/humhub/modules/local/libs`
2. Add a line to call me at `protected function handleFileUpload` on `humhub\modules\file\actions\UploadAction.php`.

## Example

protected function handleFileUpload(UploadedFile $uploadedFile, $hideInStream = false)
{
	//Reduce filesize of attached image.
	$uploadedFile = \humhub\modules\local\libs\Reduce::Resize($uploadedFile);


*/

namespace humhub\modules\local\libs;

use yii\imagine\Image;
use Imagine\Gd;
use Imagine\Image\Box;
use Imagine\Image\BoxInterface;


class Reduce {

	public static function Resize($uploadedFile) {
		$_limit = 1024;//reduce to this pixel size
		$_quality = 90;//Jpeg quality on compression
		
		//process only images
		$filetype = $uploadedFile->type;
		if(strpos($filetype,'image/') === false){
			return $uploadedFile;
		}
		
		// gif: store as-is
		if(strpos($filetype,'gif') !== false){
			return $uploadedFile;
		}
		
		$filepath = $uploadedFile->tempName;
		
		Image::getImagine()
			->open($filepath)
			->thumbnail(new Box($_limit, $_limit))
			->save($filepath , ['quality' => $_quality]);
		$uploadedFile->size = filesize($filepath);
		
		//png: convert to jpg
		if(strpos($filetype,'png') !== false){
			$imagePng = imagecreatefrompng($filepath);
			imagejpeg($imagePng, $filepath, $_quality);
			imagedestroy($imagePng);
			//update type & size
			$uploadedFile->type = "image/jpeg";
			$uploadedFile->size = filesize($filepath);
			//add ".jpg" to name
			$uploadedFile->name = $uploadedFile->name.".jpg";
		}
		
		return $uploadedFile;
	}

}

Original: http://laravel.hatenablog.com/entry/2018/07/28/021839
(Change: using Imagine instead of ImageConverter, for Humhub 1.5.0-beta.1 (April 6, 2020) Enh #3402 )

Ref: Reduce the size of the original uploaded files (advice) · Issue #1340 · humhub/humhub
humhub/humhub#1340