friendica/src/Module/Photo.php

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<?php
/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* 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 <https://www.gnu.org/licenses/>.
*
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*/
namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\Logger;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Contact;
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use Friendica\Model\Photo as MPhoto;
use Friendica\Util\Proxy;
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/**
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* Photo Module
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*/
class Photo extends BaseModule
{
/**
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* Module initializer
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*
* Fetch a photo or an avatar, in optional size, check for permissions and
* return the image
*/
public static function init(array $parameters = [])
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{
$a = DI::app();
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// @TODO: Replace with parameter from router
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if ($a->argc <= 1 || $a->argc > 4) {
throw new \Friendica\Network\HTTPException\BadRequestException();
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}
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if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
header("HTTP/1.1 304 Not Modified");
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header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
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if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
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}
header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
header("Cache-Control: max-age=31536000");
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if (function_exists("header_remove")) {
header_remove("Last-Modified");
header_remove("Expires");
header_remove("Cache-Control");
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}
exit;
}
$customsize = 0;
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$photo = false;
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// @TODO: Replace with parameter from router
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switch($a->argc) {
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case 4:
$customsize = intval($a->argv[2]);
$uid = MPhoto::stripExtension($a->argv[3]);
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$photo = self::getAvatar($uid, $a->argv[1]);
break;
case 3:
$uid = MPhoto::stripExtension($a->argv[2]);
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$photo = self::getAvatar($uid, $a->argv[1]);
break;
case 2:
$photoid = MPhoto::stripExtension($a->argv[1]);
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$scale = 0;
if (substr($photoid, -2, 1) == "-") {
$scale = intval(substr($photoid, -1, 1));
$photoid = substr($photoid, 0, -2);
}
$photo = MPhoto::getPhoto($photoid, $scale);
if ($photo === false) {
throw new \Friendica\Network\HTTPException\NotFoundException(DI::l10n()->t('The Photo with id %s is not available.', $photoid));
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}
break;
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}
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if ($photo === false) {
throw new \Friendica\Network\HTTPException\NotFoundException();
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}
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$cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
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$img = MPhoto::getImageForPhoto($photo);
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if (is_null($img) || !$img->isValid()) {
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Logger::log("Invalid photo with id {$photo["id"]}.");
throw new \Friendica\Network\HTTPException\InternalServerErrorException(DI::l10n()->t('Invalid photo with id %s.', $photo["id"]));
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}
// if customsize is set and image is not a gif, resize it
if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
$img->scaleToSquare($customsize);
}
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if (function_exists("header_remove")) {
header_remove("Pragma");
header_remove("pragma");
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}
header("Content-type: " . $img->getType());
if (!$cacheable) {
// it is a private photo that they have no permission to view.
// tell the browser not to cache it, in case they authenticate
// and subsequently have permission to see it
header("Cache-Control: no-store, no-cache, must-revalidate");
} else {
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$md5 = md5($img->asString());
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header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
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header("Etag: \"{$md5}\"");
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header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
header("Cache-Control: max-age=31536000");
}
echo $img->asString();
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exit();
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}
private static function getAvatar($uid, $type="avatar")
{
switch($type) {
case "profile":
case "custom":
$scale = 4;
break;
case "micro":
$scale = 6;
break;
case "avatar":
default:
$scale = 5;
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}
$photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
if (empty($photo)) {
$contact = DBA::selectFirst('contact', ['uid' => $uid, 'self' => true]) ?: [];
switch($type) {
case "profile":
case "custom":
$default = Contact::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
break;
case "micro":
$default = Contact::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
break;
case "avatar":
default:
$default = Contact::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
}
$photo = MPhoto::createPhotoForSystemResource($default);
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}
return $photo;
}
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}