356 lines
13 KiB
PHP
356 lines
13 KiB
PHP
<?php
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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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* @copyright 2008-2009 StatusNet, Inc.
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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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defined('GNUSOCIAL') || die();
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/**
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* Table Definition for file_thumbnail
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*/
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class File_thumbnail extends Managed_DataObject
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{
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public $__table = 'file_thumbnail'; // table name
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public $file_id; // int(4) primary_key not_null
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public $urlhash; // varchar(64) indexed
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public $url; // text
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public $filename; // text
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public $width; // int(4) primary_key
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public $height; // int(4) primary_key
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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const URLHASH_ALG = 'sha256';
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public static function schemaDef()
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{
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return array(
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'fields' => array(
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'file_id' => array('type' => 'int', 'not null' => true, 'description' => 'thumbnail for what URL/file'),
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'urlhash' => array('type' => 'varchar', 'length' => 64, 'description' => 'sha256 of url field if non-empty'),
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'url' => array('type' => 'text', 'description' => 'URL of thumbnail'),
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'filename' => array('type' => 'text', 'description' => 'if stored locally, filename is put here'),
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'width' => array('type' => 'int', 'not null' => true, 'description' => 'width of thumbnail'),
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'height' => array('type' => 'int', 'not null' => true, 'description' => 'height of thumbnail'),
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'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
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),
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'primary key' => array('file_id', 'width', 'height'),
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'indexes' => array(
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'file_thumbnail_urlhash_idx' => array('urlhash'),
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),
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'foreign keys' => array(
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'file_thumbnail_file_id_fkey' => array('file', array('file_id' => 'id')),
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)
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);
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}
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/**
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* Get the attachment's thumbnail record, if any or generate one.
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*
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* @param File $file
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* @param int|null $width Max width of thumbnail in pixels. (if null, use common_config values)
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* @param int|null $height Max height of thumbnail in pixels. (if null, square-crop to $width)
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* @param bool $crop Crop to the max-values' aspect ratio
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* @param bool $force_still Don't allow fallback to showing original (such as animated GIF)
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* @param bool|null $upscale Whether or not to scale smaller images up to larger thumbnail sizes. (null = site default)
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*
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* @return File_thumbnail
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*
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* @throws ClientException
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* @throws FileNotFoundException
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* @throws FileNotStoredLocallyException
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* @throws InvalidFilenameException
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* @throws NoResultException
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* @throws ServerException on various other errors
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* @throws UnsupportedMediaException if, despite trying, we can't understand how to make a thumbnail for this format
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* @throws UseFileAsThumbnailException if the file is considered an image itself and should be itself as thumbnail
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*/
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public static function fromFileObject(
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File $file,
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?int $width = null,
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?int $height = null,
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bool $crop = false,
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bool $force_still = true,
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?bool $upscale = null
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): File_thumbnail {
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// Is file stored remotely only?
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$was_stored_remotely = $file->isStoredRemotely();
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// If StoreRemoteMedia or Embed are enabled (they will only act if appropriate btw)...
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$media = common_get_mime_media($file->mimetype);
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Event::handle('CreateFileImageThumbnailSource', [$file, &$imgPath, $media]);
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// If it was stored remotely, we can now assume it was sufficiently retrieved
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if ($was_stored_remotely) {
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$file = File::getById($file->getID());
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}
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if (file_exists($imgPath)) {
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$image = new ImageFile($file->getID(), $imgPath, null, $file->getUrl(false));
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} else {
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try {
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$image = ImageFile::fromFileObject($file);
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} catch (InvalidFilenameException $e) {
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// Not having an original local file doesn't mean we don't have a thumbnail.
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$existing_thumb = File_thumbnail::byFile($file);
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$image = new ImageFile($file->getID(), $existing_thumb->getPath(), null, $existing_thumb->url);
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}
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}
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if ($image->animated && !common_config('thumbnail', 'animated')) {
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// null means "always use file as thumbnail"
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// false means you get choice between frozen frame or original when calling getThumbnail
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if (is_null(common_config('thumbnail', 'animated')) || !$force_still) {
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try {
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// remote files with animated GIFs as thumbnails will match this
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return File_thumbnail::byFile($file);
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} catch (NoResultException $e) {
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// and if it's not a remote file, it'll be safe to use the locally stored File
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throw new UseFileAsThumbnailException($file);
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}
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}
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}
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return $image->getFileThumbnail(
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$width,
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$height,
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$crop,
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!is_null($upscale) ? $upscale : common_config('thumbnail', 'upscale')
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);
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}
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/**
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* Save oEmbed-provided thumbnail data
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*
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* @param object $data
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* @param int $file_id
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*/
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public static function saveNew($data, $file_id)
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{
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if (!empty($data->thumbnail_url)) {
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// Non-photo types such as video will usually
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// show us a thumbnail, though it's not required.
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self::saveThumbnail(
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$file_id,
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$data->thumbnail_url,
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$data->thumbnail_width,
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$data->thumbnail_height
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);
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} elseif ($data->type == 'photo') {
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// The inline photo URL given should also fit within
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// our requested thumbnail size, per oEmbed spec.
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self::saveThumbnail(
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$file_id,
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$data->url,
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$data->width,
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$data->height
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);
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}
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}
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/**
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* Fetch an entry by using a File's id
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*
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* @param File $file The File object we're getting a thumbnail for.
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* @param boolean $notNullUrl Originally remote thumbnails have a URL stored, we use this to find the "original"
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*
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* @return File_thumbnail
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* @throws NoResultException if no File_thumbnail matched the criteria
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*/
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public static function byFile(File $file, $notNullUrl = true)
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{
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$thumb = new File_thumbnail();
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$thumb->file_id = $file->getID();
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if ($notNullUrl) {
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$thumb->whereAdd('url IS NOT NULL');
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}
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$thumb->orderBy('modified ASC'); // the first created, a somewhat ugly hack
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$thumb->limit(1);
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if (!$thumb->find(true)) {
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throw new NoResultException($thumb);
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}
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return $thumb;
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}
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/**
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* Save a thumbnail record for the referenced file record.
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*
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* FIXME: Add error handling
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*
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* @param int $file_id
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* @param string $url
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* @param int $width
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* @param int $height
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*/
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public static function saveThumbnail($file_id, $url, $width, $height, $filename = null)
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{
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$tn = new File_thumbnail;
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$tn->file_id = $file_id;
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$tn->url = $url;
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$tn->filename = $filename;
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$tn->width = (int)$width;
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$tn->height = (int)$height;
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$tn->insert();
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return $tn;
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}
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public static function path($filename): string
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{
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File::tryFilename($filename);
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// NOTE: If this is left empty in default config, it will be set to File::path('thumb')
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$dir = common_config('thumbnail', 'dir');
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if (!in_array($dir[mb_strlen($dir)-1], ['/', '\\'])) {
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$dir .= DIRECTORY_SEPARATOR;
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}
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return $dir . $filename;
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}
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public function getFilename()
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{
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return File::tryFilename($this->filename);
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}
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/**
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* @return string full filesystem path to the locally stored thumbnail file
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* @throws FileNotFoundException
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* @throws ServerException
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*/
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public function getPath(): string
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{
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$oldpath = File::path($this->getFilename());
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$thumbpath = self::path($this->getFilename());
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// If we have a file in our old thumbnail storage path, move (or copy) it to the new one
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// (if the if/elseif don't match, we have a $thumbpath just as we should and can return it)
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if (file_exists($oldpath) && !file_exists($thumbpath)) {
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try {
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// let's get the filename of the File, to check below if it happens to be identical
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$file_filename = $this->getFile()->getFilename();
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} catch (NoResultException $e) {
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// reasonably the function calling us will handle the following as "File_thumbnail entry should be deleted"
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throw new FileNotFoundException($thumbpath);
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} catch (InvalidFilenameException $e) {
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// invalid filename in getFile()->getFilename(), just
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// means the File object isn't stored locally and that
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// means it's safe to move it below.
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$file_filename = null;
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}
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if ($this->getFilename() === $file_filename) {
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// special case where thumbnail file exactly matches stored File filename
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common_debug('File filename and File_thumbnail filename match on '.$this->file_id.', copying instead');
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copy($oldpath, $thumbpath);
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} elseif (!rename($oldpath, $thumbpath)) {
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common_log(LOG_ERR, 'Could not move thumbnail from '._ve($oldpath).' to '._ve($thumbpath));
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throw new ServerException('Could not move thumbnail from old path to new path.');
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} else {
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common_log(LOG_DEBUG, 'Moved thumbnail '.$this->file_id.' from '._ve($oldpath).' to '._ve($thumbpath));
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}
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} elseif (!file_exists($thumbpath)) {
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throw new FileNotFoundException($thumbpath);
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}
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return $thumbpath;
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}
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public function getUrl()
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{
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$url = common_local_url('attachment_thumbnail', ['attachment' => $this->getFile()->getID()]);
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if (strpos($url, '?') === false) {
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$url .= '?';
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}
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return $url . http_build_query(['w'=>$this->width, 'h'=>$this->height]);
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}
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public function getHeight()
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{
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return $this->height;
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}
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public function getWidth()
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{
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return $this->width;
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}
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/**
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* @throws UseFileAsThumbnailException from File_thumbnail->getUrl() for stuff like animated GIFs
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*/
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public function getHtmlAttrs(array $orig=array(), $overwrite=true)
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{
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$attrs = [ 'height' => $this->getHeight(),
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'width' => $this->getWidth(),
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'src' => $this->getUrl() ];
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return $overwrite ? array_merge($orig, $attrs) : array_merge($attrs, $orig);
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}
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public function delete($useWhere=false)
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{
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try {
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$thumbpath = self::path($this->getFilename());
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// if file does not exist, try to delete it
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$deleted = !file_exists($thumbpath) || @unlink($thumbpath);
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if (!$deleted) {
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common_log(LOG_ERR, 'Could not unlink existing thumbnail file: '._ve($thumbpath));
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}
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} catch (InvalidFilenameException $e) {
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common_log(LOG_ERR, 'Deleting object but not attempting deleting file: '._ve($e->getMessage()));
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}
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return parent::delete($useWhere);
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}
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public function getFile(): File
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{
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return File::getByID($this->file_id);
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}
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public function getFileId()
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{
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return $this->file_id;
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}
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public static function hashurl($url)
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{
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if (!mb_strlen($url)) {
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throw new Exception('No URL provided to hash algorithm.');
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}
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return hash(self::URLHASH_ALG, $url);
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}
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public function onInsert()
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{
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$this->setUrlhash();
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}
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public function onUpdate($dataObject=false)
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{
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// if we have nothing to compare with OR it has changed from previous entry
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if (!$dataObject instanceof Managed_DataObject || $this->url !== $dataObject->url) {
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$this->setUrlhash();
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}
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}
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public function setUrlhash()
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{
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$this->urlhash = mb_strlen($this->url)>0 ? self::hashurl($this->url) : null;
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}
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}
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