383 lines
14 KiB
PHP
383 lines
14 KiB
PHP
<?php
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declare(strict_types = 1);
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// {{{ License
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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// }}}
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namespace Component\Attachment\Entity;
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use App\Core\Cache;
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use App\Core\DB\DB;
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use App\Core\Entity;
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use App\Core\Event;
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use App\Core\GSFile;
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use App\Core\Log;
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use App\Core\Router\Router;
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use App\Util\Common;
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use App\Util\Exception\ClientException;
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use App\Util\Exception\NotFoundException;
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use App\Util\Exception\NotStoredLocallyException;
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use App\Util\Exception\ServerException;
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use App\Util\TemporaryFile;
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use DateTimeInterface;
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use Symfony\Component\Mime\MimeTypes;
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/**
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* Entity for Attachment thumbnails
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*
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* @category DB
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* @package GNUsocial
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*
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* @author Zach Copley <zach@status.net>
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* @copyright 2010 StatusNet Inc.
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* @author Mikael Nordfeldth <mmn@hethane.se>
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* @copyright 2009-2014 Free Software Foundation, Inc http://www.fsf.org
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* @author Hugo Sales <hugo@hsal.es>
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* @author Diogo Peralta Cordeiro <mail@diogo.site>
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* @author Eliseu Amaro <mail@eliseuama.ro>
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* @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class AttachmentThumbnail extends Entity
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{
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public const SIZE_SMALL = 0;
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public const SIZE_MEDIUM = 1;
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public const SIZE_BIG = 2;
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public const SIZE_MAP = [
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'small' => self::SIZE_SMALL,
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'medium' => self::SIZE_MEDIUM,
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'big' => self::SIZE_BIG,
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];
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// {{{ Autocode
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// @codeCoverageIgnoreStart
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private int $attachment_id;
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private ?string $mimetype = null;
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private int $size = 0;
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private string $filename;
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private int $width;
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private int $height;
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private DateTimeInterface $modified;
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public function setAttachmentId(int $attachment_id): self
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{
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$this->attachment_id = $attachment_id;
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return $this;
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}
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public function getAttachmentId(): int
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{
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return $this->attachment_id;
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}
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public function setMimetype(?string $mimetype): self
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{
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$this->mimetype = \is_null($mimetype) ? null : mb_substr($mimetype, 0, 129);
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return $this;
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}
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public function getMimetype(): ?string
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{
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return $this->mimetype;
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}
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public function setSize(int $size): self
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{
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$this->size = $size;
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return $this;
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}
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public function getSize(): int
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{
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return $this->size;
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}
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public function setFilename(string $filename): self
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{
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$this->filename = mb_substr($filename, 0, 191);
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return $this;
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}
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public function getFilename(): string
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{
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return $this->filename;
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}
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public function setWidth(int $width): self
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{
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$this->width = $width;
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return $this;
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}
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public function getWidth(): int
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{
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return $this->width;
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}
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public function setHeight(int $height): self
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{
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$this->height = $height;
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return $this;
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}
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public function getHeight(): int
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{
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return $this->height;
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}
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public function setModified(DateTimeInterface $modified): self
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{
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$this->modified = $modified;
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return $this;
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}
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public function getModified(): DateTimeInterface
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{
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return $this->modified;
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}
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// @codeCoverageIgnoreEnd
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// }}} Autocode
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public static function sizeIntToStr(?int $size): string
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{
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$map = array_flip(self::SIZE_MAP);
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return $map[$size] ?? $map[self::SIZE_SMALL];
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}
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public static function sizeStrToInt(string $size)
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{
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return self::SIZE_MAP[$size] ?? self::SIZE_SMALL;
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}
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private ?Attachment $attachment = null;
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public function setAttachment(?Attachment $attachment)
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{
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$this->attachment = $attachment;
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}
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public function getAttachment()
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{
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if (isset($this->attachment) && !\is_null($this->attachment)) {
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return $this->attachment;
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} else {
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return $this->attachment = DB::findOneBy('attachment', ['id' => $this->attachment_id]);
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}
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}
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public static function getCacheKey(int $id, int $size)
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{
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return "thumb-{$id}-{$size}";
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}
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/**
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* @param ?string $size 'small'|'medium'|'big'
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*
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* @throws ClientException
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* @throws NotFoundException
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* @throws ServerException
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*
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* @return ?self
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*/
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public static function getOrCreate(Attachment $attachment, ?string $size = null, bool $crop = false): ?self
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{
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$size ??= Common::config('thumbnail', 'default_size');
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$size_int = self::sizeStrToInt($size);
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try {
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return Cache::get(
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self::getCacheKey($attachment->getId(), $size_int),
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fn () => DB::findOneBy(self::class, ['attachment_id' => $attachment->getId(), 'size' => $size_int]),
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);
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} catch (NotFoundException) {
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if (\is_null($attachment->getWidth()) || \is_null($attachment->getHeight())) {
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return null;
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}
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[$predicted_width, $predicted_height] = self::predictScalingValues($attachment->getWidth(), $attachment->getHeight(), $size, $crop);
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if (\is_null($attachment->getPath()) || !file_exists($attachment->getPath())) {
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// Before we quit, check if there's any other thumb
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$alternative_thumbs = DB::findBy(self::class, ['attachment_id' => $attachment->getId()]);
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usort($alternative_thumbs, fn ($l, $r) => $r->getSize() <=> $l->getSize());
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if (empty($alternative_thumbs)) {
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throw new NotStoredLocallyException();
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} else {
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return $alternative_thumbs[0];
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}
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}
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$thumbnail = self::create(['attachment_id' => $attachment->getId()]);
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$mimetype = $attachment->getMimetype();
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$event_map[$mimetype] = [];
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$major_mime = GSFile::mimetypeMajor($mimetype);
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$event_map[$major_mime] = [];
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Event::handle('FileResizerAvailable', [&$event_map, $mimetype]);
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// Always prefer specific encoders
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/** @var callable[] function(string $source, ?TemporaryFile &$destination, int &$width, int &$height, bool $smart_crop, ?string &$mimetype): bool */
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$encoders = array_merge($event_map[$mimetype], $event_map[$major_mime]);
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foreach ($encoders as $encoder) {
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/** @var ?TemporaryFile */
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$temp = null; // Let the EncoderPlugin create a temporary file for us
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if ($encoder($attachment->getPath(), $temp, $predicted_width, $predicted_height, $crop, $mimetype)) {
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$thumbnail->setAttachment($attachment);
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$thumbnail->setSize($size_int);
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$mimetype = $temp->getMimeType();
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$ext = '.' . MimeTypes::getDefault()->getExtensions($mimetype)[0];
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$filename = "{$predicted_width}x{$predicted_height}{$ext}-" . $attachment->getFilehash();
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$thumbnail->setFilename($filename);
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$thumbnail->setMimetype($mimetype);
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$thumbnail->setWidth($predicted_width);
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$thumbnail->setHeight($predicted_height);
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DB::persist($thumbnail);
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DB::flush();
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$temp->move(Common::config('thumbnail', 'dir'), $filename);
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return $thumbnail;
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}
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}
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return null;
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}
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}
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public function getPath()
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{
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return Common::config('thumbnail', 'dir') . \DIRECTORY_SEPARATOR . $this->getFilename();
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}
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public function getUrl()
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{
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return Router::url('attachment_thumbnail', ['id' => $this->getAttachmentId(), 'size' => self::sizeIntToStr($this->getSize())]);
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}
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/**
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* Delete an attachment thumbnail
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*/
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public function delete(bool $flush = true): void
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{
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$filepath = $this->getPath();
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if (file_exists($filepath)) {
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if (@unlink($filepath) === false) {
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// @codeCoverageIgnoreStart
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Log::warning("Failed deleting file for attachment thumbnail with id={$this->getAttachmentId()}, size={$this->getSize()} at {$filepath}");
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// @codeCoverageIgnoreEnd
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}
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}
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Cache::delete(self::getCacheKey($this->getAttachmentId(), $this->getSize()));
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DB::remove($this);
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if ($flush) {
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DB::flush();
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}
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}
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/**
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* Gets scaling values for images of various types. Cropping can be enabled.
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*
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* Values will scale _up_ to fit max values if cropping is enabled!
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* With cropping disabled, the max value of each axis will be respected.
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*
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* @param int $existing_width Original width
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* @param int $existing_height Original height
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*
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* @return array [predicted width, predicted height]
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*/
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public static function predictScalingValues(
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int $existing_width,
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int $existing_height,
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string $requested_size,
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bool $crop,
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): array {
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/**
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* 1:1 => Square
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* 4:3 => SD
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* 11:8 => Academy Ratio
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* 3:2 => Classic 35mm
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* 16:10 => Golden Ratio
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* 16:9 => Widescreen
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* 2.2:1 => Standard 70mm film
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*/
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$allowed_aspect_ratios = [1, 1.3, 1.376, 1.5, 1.6, 1.7, 2.2]; // Ascending array
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$sizes = [
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'small' => Common::config('thumbnail', 'small'),
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'medium' => Common::config('thumbnail', 'medium'),
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'big' => Common::config('thumbnail', 'big'),
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];
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// We only scale if the image is larger than the minimum width and height for a thumbnail
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if ($existing_width < Common::config('thumbnail', 'minimum_width') && $existing_height < Common::config('thumbnail', 'minimum_height')) {
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return [$existing_width, $existing_height];
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}
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// We only scale if the total of pixels is greater than the maximum allowed for a thumbnail
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$total_of_pixels = $existing_width * $existing_height;
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if ($total_of_pixels < Common::config('thumbnail', 'maximum_pixels')) {
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return [$existing_width, $existing_height];
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}
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// Is this a portrait image?
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$flip = $existing_height > $existing_width;
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// Find the aspect ratio of the given image
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$existing_aspect_ratio = !$flip ? $existing_width / $existing_height : $existing_height / $existing_width;
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// Binary search the closer allowed aspect ratio
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$left = 0;
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$right = \count($allowed_aspect_ratios) - 1;
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while ($left < $right) {
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$mid = floor($left + ($right - $left) / 2);
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// Comparing absolute distances with middle value and right value
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if (abs($existing_aspect_ratio - $allowed_aspect_ratios[$mid]) < abs($existing_aspect_ratio - $allowed_aspect_ratios[$right])) {
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// search the left side of the array
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$right = $mid;
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} else {
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// search the right side of the array
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$left = $mid + 1;
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}
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}
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$closest_aspect_ratio = $allowed_aspect_ratios[$left];
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unset($mid, $left, $right);
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// TODO: For crop, we should test a threshold and understand if the image would better be cropped
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// Resulting width and height
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$rw = (int) ($sizes[$requested_size]);
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$rh = (int) ($rw / $closest_aspect_ratio);
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return !$flip ? [$rw, $rh] : [$rh, $rw];
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}
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public static function schemaDef(): array
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{
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return [
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'name' => 'attachment_thumbnail',
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'fields' => [
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'attachment_id' => ['type' => 'int', 'foreign key' => true, 'target' => 'Attachment.id', 'multiplicity' => 'one to one', 'not null' => true, 'description' => 'thumbnail for what attachment'],
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'mimetype' => ['type' => 'varchar', 'length' => 129, 'description' => 'resource mime type 64+1+64, images hardly will show up with long mimetypes, this is probably safe considering rfc6838#section-4.2'],
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'size' => ['type' => 'int', 'not null' => true, 'default' => 0, 'description' => '0 = small; 1 = medium; 2 = big'],
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'filename' => ['type' => 'varchar', 'length' => 191, 'not null' => true, 'description' => 'thumbnail filename'],
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'width' => ['type' => 'int', 'not null' => true, 'description' => 'width in pixels, if it can be described as such and data is available'],
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'height' => ['type' => 'int', 'not null' => true, 'description' => 'height in pixels, if it can be described as such and data is available'],
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'modified' => ['type' => 'timestamp', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was modified'],
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],
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'primary key' => ['attachment_id', 'size'],
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'indexes' => [
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'attachment_thumbnail_attachment_id_idx' => ['attachment_id'],
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],
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];
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}
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}
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