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<?php
/**
* This file is part of the Passwords App
* created by Marius David Wieschollek
* and licensed under the AGPL.
*/
namespace OCA\Passwords\Helper\Image;
use OC;
use OCA\Passwords\Exception\Image\ImageConversionException;
use OCA\Passwords\Exception\Image\ImageExportException;
use OCA\Passwords\Services\ConfigurationService;
/**
* Class AbstractImageHelper
*
* @package OCA\Passwords\Helper\Image
*/
abstract class AbstractImageHelper {
/**
* AbstractImageHelper constructor.
*
* @param ConfigurationService $configurationService
*/
public function __construct(protected ConfigurationService $config) {
}
/**
* @param int $width
* @param int $height
* @param int $minWidth
* @param int $minHeight
* @param int $maxWidth
* @param int $maxHeight
*
* @return array
*/
public function getBestImageFit(
int $width,
int $height,
int $minWidth,
int $minHeight,
int $maxWidth,
int $maxHeight
) {
$heightWidthRatio = (int) $height / $width;
$widthHeightRatio = (int) $width / $height;
$size = [
'width' => (int) $minWidth,
'height' => (int) $minWidth * $heightWidthRatio,
'cropX' => 0,
'cropY' => 0,
'cropWidth' => 0,
'cropHeight' => 0,
'cropNeeded' => false
];
if($minHeight !== 0 && $size['height'] < $minHeight) {
$size['width'] = (int) $minHeight * $widthHeightRatio;
$size['height'] = (int) $minHeight;
if($maxWidth !== 0 && $size['width'] > $maxWidth) {
$size['cropX'] = (int) ($size['width'] - $maxWidth) / 2;
$size['cropWidth'] = (int) $maxWidth;
$size['cropHeight'] = (int) $size['height'];
$size['cropNeeded'] = true;
}
} else if($maxHeight !== 0 && $size['height'] > $maxHeight) {
$size['width'] = (int) $minHeight * $widthHeightRatio;
if($maxWidth !== 0 && $size['width'] > $maxWidth) {
$size['width'] = (int) $maxWidth;
$size['height'] = (int) $maxWidth * $heightWidthRatio;
$size['cropWidth'] = (int) $size['width'];
$size['cropHeight'] = (int) $maxHeight;
$size['cropNeeded'] = true;
} else if($size['width'] < $minWidth) {
$size['width'] = (int) $minWidth;
$size['height'] = (int) $minWidth * $heightWidthRatio;
$size['cropWidth'] = (int) $size['width'];
$size['cropHeight'] = (int) $maxHeight;
$size['cropNeeded'] = true;
}
}
if($size['width'] === 0 && $size['height'] === 0) {
$size['width'] = (int) $width;
$size['height'] = (int) $height;
}
return $size;
}
/**
* @param $blob
*
* @return string
*/
public function getImageMime($blob): string {
$size = @getimagesizefromstring($blob);
if(!$size || empty($size['mime'])) return 'application/octet-stream';
return $size['mime'];
}
/**
* @param $blob
*
* @return bool
*/
public function supportsImage($blob): bool {
$mime = $this->getImageMime($blob);
[$type, $format] = explode('/', $mime);
if($type !== 'image') return false;
return $this->supportsFormat($format);
}
/**
* @param $image
* @param int $minWidth
* @param int $minHeight
* @param int $maxWidth
* @param int $maxHeight
*
* @return mixed
*/
abstract public function advancedResizeImage($image, int $minWidth, int $minHeight, int $maxWidth, int $maxHeight);
/**
* @param $image
* @param int $size
*
* @return mixed
*/
abstract public function simpleResizeImage($image, int $size);
/**
* @param $image
*
* @return mixed
*/
abstract public function cropImageRectangular($image);
/**
* @param $imageBlob
*
* @return mixed
*/
abstract public function getImageFromBlob($imageBlob);
/**
* @param $image
*
* @return bool
*/
abstract public function destroyImage($image): bool;
/**
* @param $image
*
* @return string
* @trows ImageExportException
*/
abstract public function exportJpeg($image): string;
/**
* @param $image
*
* @return string
* @trows ImageExportException
*/
abstract public function exportPng($image): string;
/**
* @param string $format
*
* @return bool
*/
abstract public function supportsFormat(string $format): bool;
/**
* @param $data
*
* @return string
* @throws ImageConversionException
*/
abstract public function convertIcoToPng($data): string;
/**
* Whether this service can be used in the current environment
*
* @return bool
*/
abstract public function isAvailable(): bool;
/**
* @return string
*/
public function getDefaultFont(): string {
return OC::$SERVERROOT.'/core/fonts/NotoSans-Regular.ttf';
}
}
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