<?php
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
namespace App\Entity;
use App\Core\Cache;
use App\Core\DB\DB;
use App\Core\Entity;
use App\Core\Event;
use App\Core\GSFile;
use App\Core\Log;
use App\Util\Common;
use App\Util\Exception\NotFoundException;
use App\Util\Exception\ServerException;
use App\Util\TemporaryFile;
use DateTimeInterface;
/**
* Entity for Attachment thumbnails
*
* @category DB
* @package GNUsocial
*
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet Inc.
* @author Mikael Nordfeldth <mmn@hethane.se>
* @copyright 2009-2014 Free Software Foundation, Inc http://www.fsf.org
* @author Hugo Sales <hugo@hsal.es>
* @author Diogo Peralta Cordeiro <mail@diogo.site>
* @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class AttachmentThumbnail extends Entity
{
// {{{ Autocode
// @codeCoverageIgnoreStart
private int $attachment_id;
private int $width;
private int $height;
private string $filename;
private \DateTimeInterface $modified;
public function setAttachmentId(int $attachment_id): self
{
$this->attachment_id = $attachment_id;
return $this;
}
public function getAttachmentId(): int
{
return $this->attachment_id;
}
public function setWidth(int $width): self
{
$this->width = $width;
return $this;
}
public function getWidth(): int
{
return $this->width;
}
public function setHeight(int $height): self
{
$this->height = $height;
return $this;
}
public function getHeight(): int
{
return $this->height;
}
public function setFilename(string $filename): self
{
$this->filename = $filename;
return $this;
}
public function getFilename(): string
{
return $this->filename;
}
public function setModified(DateTimeInterface $modified): self
{
$this->modified = $modified;
return $this;
}
public function getModified(): DateTimeInterface
{
return $this->modified;
}
// @codeCoverageIgnoreEnd
// }}} Autocode
private Attachment $attachment;
public function setAttachment(Attachment $attachment)
{
$this->attachment = $attachment;
}
public function getAttachment()
{
if (isset($this->attachment)) {
return $this->attachment;
} else {
return $this->attachment = DB::findOneBy('attachment', ['id' => $this->attachment_id]);
}
}
/**
* @param Attachment $attachment
* @param int $width
* @param int $height
* @param bool $crop
*
* @throws ServerException
* @throws \App\Util\Exception\TemporaryFileException
*
* @return mixed
*/
public static function getOrCreate(Attachment $attachment, int $width, int $height, bool $crop)
{
try {
return Cache::get('thumb-' . $attachment->getId() . "-{$width}x{$height}",
function () use ($crop, $attachment, $width, $height) {
[$predicted_width, $predicted_height] = self::predictScalingValues($attachment->getWidth(),$attachment->getHeight(), $width, $height, $crop);
return DB::findOneBy('attachment_thumbnail', ['attachment_id' => $attachment->getId(), 'width' => $predicted_width, 'height' => $predicted_height]);
});
} catch (NotFoundException $e) {
$ext = image_type_to_extension(IMAGETYPE_WEBP, include_dot: true);
$temp = new TemporaryFile(['prefix' => 'gs-thumbnail', 'suffix' => $ext]);
$thumbnail = self::create(['attachment_id' => $attachment->getId()]);
$event_map = ['image' => 'ResizeImagePath', 'video' => 'ResizeVideoPath'];
$major_mime = GSFile::mimetypeMajor($attachment->getMimetype());
if (in_array($major_mime, array_keys($event_map)) && !Event::handle($event_map[$major_mime], [$attachment->getPath(), $temp->getRealPath(), &$width, &$height, $crop, &$mimetype])) {
$thumbnail->setWidth($width);
$thumbnail->setHeight($height);
$filename = "{$width}x{$height}{$ext}-" . $attachment->getFileHash();
$temp->move(Common::config('thumbnail', 'dir'), $filename);
$thumbnail->setFilename($filename);
DB::persist($thumbnail);
DB::flush();
return $thumbnail;
} else {
Log::debug($m = ('Cannot resize attachment with mimetype ' . $attachment->getMimetype()));
throw new ServerException($m);
}
}
}
public function getPath()
{
return Common::config('thumbnail', 'dir') . $this->getFilename();
}
public function getUrl()
{
return Router::url('attachment_thumbnail', ['id' => $this->getAttachmentId(), 'w' => $this->getWidth(), 'h' => $this->getHeight()]);
}
/**
* Get the HTML attributes for this thumbnail
*/
public function getHTMLAttributes(array $orig = [], bool $overwrite = true)
{
$attrs = [
'height' => $this->getHeight(),
'width' => $this->getWidth(),
'src' => $this->getUrl(),
];
return $overwrite ? array_merge($orig, $attrs) : array_merge($attrs, $orig);
}
/**
* Delete an attachment thumbnail
*/
public function delete(bool $flush = true): void
{
$filepath = $this->getPath();
if (file_exists($filepath)) {
if (@unlink($filepath) === false) {
Log::warning("Failed deleting file for attachment thumbnail with id={$this->attachment_id}, width={$this->width}, height={$this->height} at {$filepath}");
}
}
DB::remove($this);
if ($flush) {
DB::flush();
}
}
/**
* Gets scaling values for images of various types. Cropping can be enabled.
*
* Values will scale _up_ to fit max values if cropping is enabled!
* With cropping disabled, the max value of each axis will be respected.
*
* @param $width int Original width
* @param $height int Original height
* @param $maxW int Resulting max width
* @param $maxH int Resulting max height
* @param $crop bool Crop to the size (not preserving aspect ratio)
*
* @return array [predicted width, predicted height]
*/
public static function predictScalingValues(
int $width,
int $height,
int $maxW,
int $maxH,
bool $crop
): array {
// Cropping data (for original image size). Default values, 0 and null,
// imply no cropping and with preserved aspect ratio (per axis).
$cx = 0; // crop x
$cy = 0; // crop y
$cw = null; // crop area width
$ch = null; // crop area height
if ($crop) {
$s_ar = $width / $height;
$t_ar = $maxW / $maxH;
$rw = $maxW;
$rh = $maxH;
// Source aspect ratio differs from target, recalculate crop points!
if ($s_ar > $t_ar) {
$cx = floor($width / 2 - $height * $t_ar / 2);
$cw = ceil($height * $t_ar);
} elseif ($s_ar < $t_ar) {
$cy = floor($height / 2 - $width / $t_ar / 2);
$ch = ceil($width / $t_ar);
}
} else {
$rw = $maxW;
$rh = ceil($height * $rw / $width);
// Scaling caused too large height, decrease to max accepted value
if ($rh > $maxH) {
$rh = $maxH;
$rw = ceil($width * $rh / $height);
}
}
return [(int) $rw, (int) $rh];
}
public static function schemaDef(): array
{
return [
'name' => 'attachment_thumbnail',
'fields' => [
'attachment_id' => ['type' => 'int', 'foreign key' => true, 'target' => 'Attachment.id', 'multiplicity' => 'one to one', 'not null' => true, 'description' => 'thumbnail for what attachment'],
'width' => ['type' => 'int', 'not null' => true, 'description' => 'width of thumbnail'],
'height' => ['type' => 'int', 'not null' => true, 'description' => 'height of thumbnail'],
'filename' => ['type' => 'varchar', 'length' => 191, 'not null' => true, 'description' => 'thubmnail filename'],
'modified' => ['type' => 'timestamp', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was modified'],
],
'primary key' => ['attachment_id', 'width', 'height'],
'indexes' => [
'attachment_thumbnail_attachment_id_idx' => ['attachment_id'],
],
];
}
}