<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('GNUSOCIAL')) { exit(1); }
/**
* Table Definition for file_thumbnail
*/
class File_thumbnail extends Managed_DataObject
{
public $__table = 'file_thumbnail'; // table name
public $file_id; // int(4) primary_key not_null
public $urlhash; // varchar(64) indexed
public $url; // text
public $filename; // text
public $width; // int(4) primary_key
public $height; // int(4) primary_key
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
const URLHASH_ALG = 'sha256';
public static function schemaDef()
{
return array(
'fields' => array(
'file_id' => array('type' => 'int', 'not null' => true, 'description' => 'thumbnail for what URL/file'),
'urlhash' => array('type' => 'varchar', 'length' => 64, 'description' => 'sha256 of url field if non-empty'),
'url' => array('type' => 'text', 'description' => 'URL of thumbnail'),
'filename' => array('type' => 'text', 'description' => 'if stored locally, filename is put here'),
'width' => array('type' => 'int', 'description' => 'width of thumbnail'),
'height' => array('type' => 'int', 'description' => 'height of thumbnail'),
'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
),
'primary key' => array('file_id', 'width', 'height'),
'indexes' => array(
'file_thumbnail_file_id_idx' => array('file_id'),
'file_thumbnail_urlhash_idx' => array('urlhash'),
),
'foreign keys' => array(
'file_thumbnail_file_id_fkey' => array('file', array('file_id' => 'id')),
)
);
}
/**
* Save oEmbed-provided thumbnail data
*
* @param object $data
* @param int $file_id
*/
public static function saveNew($data, $file_id) {
if (!empty($data->thumbnail_url)) {
// Non-photo types such as video will usually
// show us a thumbnail, though it's not required.
self::saveThumbnail($file_id,
$data->thumbnail_url,
$data->thumbnail_width,
$data->thumbnail_height);
} else if ($data->type == 'photo') {
// The inline photo URL given should also fit within
// our requested thumbnail size, per oEmbed spec.
self::saveThumbnail($file_id,
$data->url,
$data->width,
$data->height);
}
}
/**
* Fetch an entry by using a File's id
*
* @param File $file The File object we're getting a thumbnail for.
* @param boolean $notNullUrl Originally remote thumbnails have a URL stored, we use this to find the "original"
*
* @return File_thumbnail
* @throws NoResultException if no File_thumbnail matched the criteria
*/
static function byFile(File $file, $notNullUrl=true) {
$thumb = new File_thumbnail();
$thumb->file_id = $file->getID();
if ($notNullUrl) {
$thumb->whereAdd('url IS NOT NULL');
}
$thumb->orderBy('modified ASC'); // the first created, a somewhat ugly hack
$thumb->limit(1);
if (!$thumb->find(true)) {
throw new NoResultException($thumb);
}
return $thumb;
}
/**
* Save a thumbnail record for the referenced file record.
*
* FIXME: Add error handling
*
* @param int $file_id
* @param string $url
* @param int $width
* @param int $height
*/
static function saveThumbnail($file_id, $url, $width, $height, $filename=null)
{
$tn = new File_thumbnail;
$tn->file_id = $file_id;
$tn->url = $url;
$tn->filename = $filename;
$tn->width = intval($width);
$tn->height = intval($height);
$tn->insert();
return $tn;
}
static function path($filename)
{
File::tryFilename($filename);
// NOTE: If this is left empty in default config, it will be set to File::path('thumb')
$dir = common_config('thumbnail', 'dir');
if (!in_array($dir[mb_strlen($dir)-1], ['/', '\\'])) {
$dir .= DIRECTORY_SEPARATOR;
}
return $dir . $filename;
}
static function url($filename)
{
File::tryFilename($filename);
// FIXME: private site thumbnails?
$path = common_config('thumbnail', 'path');
if (empty($path)) {
return File::url('thumb')."/{$filename}";
}
$protocol = (GNUsocial::useHTTPS() ? 'https' : 'http');
$server = common_config('thumbnail', 'server') ?: common_config('site', 'server');
if ($path[mb_strlen($path)-1] != '/') {
$path .= '/';
}
if ($path[0] != '/') {
$path = '/'.$path;
}
return $protocol.'://'.$server.$path.$filename;
}
public function getFilename()
{
return File::tryFilename($this->filename);
}
/**
* @return string full filesystem path to the locally stored thumbnail file
* @throws FileNotFoundException
* @throws ServerException
*/
public function getPath()
{
$oldpath = File::path($this->getFilename());
$thumbpath = self::path($this->getFilename());
// If we have a file in our old thumbnail storage path, move (or copy) it to the new one
// (if the if/elseif don't match, we have a $thumbpath just as we should and can return it)
if (file_exists($oldpath) && !file_exists($thumbpath)) {
try {
// let's get the filename of the File, to check below if it happens to be identical
$file_filename = $this->getFile()->getFilename();
} catch (NoResultException $e) {
// reasonably the function calling us will handle the following as "File_thumbnail entry should be deleted"
throw new FileNotFoundException($thumbpath);
} catch (InvalidFilenameException $e) {
// invalid filename in getFile()->getFilename(), just
// means the File object isn't stored locally and that
// means it's safe to move it below.
$file_filename = null;
}
if ($this->getFilename() === $file_filename) {
// special case where thumbnail file exactly matches stored File filename
common_debug('File filename and File_thumbnail filename match on '.$this->file_id.', copying instead');
copy($oldpath, $thumbpath);
} elseif (!rename($oldpath, $thumbpath)) {
common_log(LOG_ERR, 'Could not move thumbnail from '._ve($oldpath).' to '._ve($thumbpath));
throw new ServerException('Could not move thumbnail from old path to new path.');
} else {
common_log(LOG_DEBUG, 'Moved thumbnail '.$this->file_id.' from '._ve($oldpath).' to '._ve($thumbpath));
}
} elseif (!file_exists($thumbpath)) {
throw new FileNotFoundException($thumbpath);
}
return $thumbpath;
}
public function getUrl()
{
if (!empty($this->filename) || $this->getFile()->isLocal()) {
// A locally stored File, so we can dynamically generate a URL.
$url = common_local_url('attachment_thumbnail', array('attachment'=>$this->file_id));
if (strpos($url, '?') === false) {
$url .= '?';
}
return $url . http_build_query(array('w'=>$this->width, 'h'=>$this->height));
}
// No local filename available, return the remote URL we have stored
return $this->url;
}
public function getHeight()
{
return $this->height;
}
public function getWidth()
{
return $this->width;
}
/**
* @throws UseFileAsThumbnailException from File_thumbnail->getUrl() for stuff like animated GIFs
*/
public function getHtmlAttrs(array $orig=array(), $overwrite=true)
{
$attrs = [ 'height' => $this->getHeight(),
'width' => $this->getWidth(),
'src' => $this->getUrl() ];
return $overwrite ? array_merge($orig, $attrs) : array_merge($attrs, $orig);
}
public function delete($useWhere=false)
{
try {
$thumbpath = self::path($this->getFilename());
// if file does not exist, try to delete it
$deleted = !file_exists($thumbpath) || @unlink($thumbpath);
if (!$deleted) {
common_log(LOG_ERR, 'Could not unlink existing thumbnail file: '._ve($thumbpath));
}
} catch (InvalidFilenameException $e) {
common_log(LOG_ERR, 'Deleting object but not attempting deleting file: '._ve($e->getMessage()));
}
return parent::delete($useWhere);
}
public function getFile()
{
return File::getByID($this->file_id);
}
public function getFileId()
{
return $this->file_id;
}
static public function hashurl($url)
{
if (!mb_strlen($url)) {
throw new Exception('No URL provided to hash algorithm.');
}
return hash(self::URLHASH_ALG, $url);
}
public function onInsert()
{
$this->setUrlhash();
}
public function onUpdate($dataObject=false)
{
// if we have nothing to compare with OR it has changed from previous entry
if (!$dataObject instanceof Managed_DataObject || $this->url !== $dataObject->url) {
$this->setUrlhash();
}
}
public function setUrlhash()
{
$this->urlhash = mb_strlen($this->url)>0 ? self::hashurl($this->url) : null;
}
}