<?php
class VereinImageFunctions {
	const BASE_PATH = 'images/uploaded/';
	
	public static function resizeAndSave(CUploadedFile $uploadedImage, $vereinSlug) {
		$filename = VereinImageFunctions::save($uploadedImage, $vereinSlug);
		if (null !== $filename) {
		    VereinImageFunctions::resize($filename);
		}
		
		return $filename;
	}
	
	public static function save(CUploadedFile $uploadedImage, $vereinSlug) {
		$filename = VereinImageFunctions::createFilename($uploadedImage->getName(), $vereinSlug);
		if ($uploadedImage->saveAs($filename)) {
			return $filename;
		} else {
			return null;
		}
	}
	
	public static function resize($filename) {
		$image = Yii::app()->simpleImage->load($filename);
		
		if ($image->getWidth() > Yii::app()->params['logo_width']) {
		    $image->resizeToWidth(Yii::app()->params['logo_width']);
		}
		
		if ($image->getHeight() > Yii::app()->params['logo_height']) {
		    $image->resizeToHeight(Yii::app()->params['logo_height']);
		}
		$image->save($filename);
	}
	
	private static function createFilename($uploadedName, $vereinSlug) {
		$suffix = VereinImageFunctions::getSuffix($uploadedName);
		return VereinImageFunctions::BASE_PATH.time()."-".$vereinSlug.$suffix;
	}
	
	private static function getSuffix($name) {
		return (null !== $name) ? substr($name, strrpos($name, '.')) : '';
	}
}
?>