gnu-social/classes/File_thumbnail.php

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<?php
/*
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* 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
*/
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class File_thumbnail extends Managed_DataObject
{
public $__table = 'file_thumbnail'; // table name
public $file_id; // int(4) primary_key not_null
public $url; // varchar(255) unique_key
public $filename; // varchar(255)
public $width; // int(4) primary_key
public $height; // int(4) primary_key
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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public static function schemaDef()
{
return array(
'fields' => array(
'file_id' => array('type' => 'int', 'not null' => true, 'description' => 'thumbnail for what URL/file'),
'url' => array('type' => 'varchar', 'length' => 255, 'description' => 'URL of thumbnail'),
'filename' => array('type' => 'varchar', 'length' => 255, 'description' => 'if stored locally, filename is put here'),
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'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'),
),
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'foreign keys' => array(
'file_thumbnail_file_id_fkey' => array('file', array('file_id' => 'id')),
)
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);
}
/**
* 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
*/
static function byFile(File $file) {
$file_thumbnail = self::getKV('file_id', $file->id);
if (!$file_thumbnail instanceof File_thumbnail) {
throw new ServerException(sprintf('No File_thumbnail entry for File id==%u', $file->id));
}
return $file_thumbnail;
}
/**
* 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)
{
// TODO: Store thumbnails in their own directory and don't use File::path here
return File::path($filename);
}
public function getPath()
{
return self::path($this->filename);
}
public function getUrl()
{
if (!empty($this->getFile()->filename)) {
// A locally stored File, so let's generate a URL for our instance.
$url = File::url($this->filename);
if ($url != $this->url) {
// For indexing purposes, in case we do a lookup on the 'url' field.
// also we're fixing possible changes from http to https, or paths
$this->updateUrl($url);
}
return $url;
}
// No local filename available, return the URL we have stored
return $this->url;
}
public function updateUrl($url)
{
$file = File_thumbnail::getKV('url', $url);
if ($file instanceof File_thumbnail) {
throw new ServerException('URL already exists in DB');
}
$sql = 'UPDATE %1$s SET url=%2$s WHERE url=%3$s;';
$result = $this->query(sprintf($sql, $this->__table,
$this->_quote((string)$url),
$this->_quote((string)$this->url)));
if ($result === false) {
common_log_db_error($this, 'UPDATE', __FILE__);
throw new ServerException("Could not UPDATE {$this->__table}.url");
}
return $result;
}
public function delete($useWhere=false)
{
if (!empty($this->filename) && file_exists(File_thumbnail::path($this->filename))) {
$deleted = @unlink(self::path($this->filename));
if (!$deleted) {
common_log(LOG_ERR, sprintf('Could not unlink existing file: "%s"', self::path($this->filename)));
}
}
return parent::delete($useWhere);
}
public function getFile()
{
$file = new File();
$file->id = $this->file_id;
if (!$file->find(true)) {
throw new NoResultException($file);
}
return $file;
}
}