src/Module/Photo.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module;
  23
  24 use Friendica\BaseModule;
  25 use Friendica\Core\Logger;
  26 use Friendica\Core\System;
  27 use Friendica\DI;
  28 use Friendica\Model\Photo as MPhoto;
  29
  30 /**
  31  * Photo Module
  32  */
  33 class Photo extends BaseModule
  34 {
  35         /**
  36          * Module initializer
  37          *
  38          * Fetch a photo or an avatar, in optional size, check for permissions and
  39          * return the image
  40          */
  41         public static function init(array $parameters = [])
  42         {
  43                 $a = DI::app();
  44                 // @TODO: Replace with parameter from router
  45                 if ($a->argc <= 1 || $a->argc > 4) {
  46                         throw new \Friendica\Network\HTTPException\BadRequestException();
  47                 }
  48
  49                 if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
  50                         header("HTTP/1.1 304 Not Modified");
  51                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  52                         if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
  53                                 header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
  54                         }
  55                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  56                         header("Cache-Control: max-age=31536000");
  57                         if (function_exists("header_remove")) {
  58                                 header_remove("Last-Modified");
  59                                 header_remove("Expires");
  60                                 header_remove("Cache-Control");
  61                         }
  62                         exit;
  63                 }
  64
  65                 $customsize = 0;
  66                 $photo = false;
  67                 // @TODO: Replace with parameter from router
  68                 switch($a->argc) {
  69                         case 4:
  70                                 $customsize = intval($a->argv[2]);
  71                                 $uid = MPhoto::stripExtension($a->argv[3]);
  72                                 $photo = self::getAvatar($uid, $a->argv[1]);
  73                                 break;
  74                         case 3:
  75                                 $uid = MPhoto::stripExtension($a->argv[2]);
  76                                 $photo = self::getAvatar($uid, $a->argv[1]);
  77                                 break;
  78                         case 2:
  79                                 $photoid = MPhoto::stripExtension($a->argv[1]);
  80                                 $scale = 0;
  81                                 if (substr($photoid, -2, 1) == "-") {
  82                                         $scale = intval(substr($photoid, -1, 1));
  83                                         $photoid = substr($photoid, 0, -2);
  84                                 }
  85                                 $photo = MPhoto::getPhoto($photoid, $scale);
  86                                 if ($photo === false) {
  87                                         throw new \Friendica\Network\HTTPException\NotFoundException(DI::l10n()->t('The Photo with id %s is not available.', $photoid));
  88                                 }
  89                                 break;
  90                 }
  91
  92                 if ($photo === false) {
  93                         throw new \Friendica\Network\HTTPException\NotFoundException();
  94                 }
  95
  96                 $cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
  97
  98                 $img = MPhoto::getImageForPhoto($photo);
  99
 100                 if (is_null($img) || !$img->isValid()) {
 101                         Logger::log("Invalid photo with id {$photo["id"]}.");
 102                         throw new \Friendica\Network\HTTPException\InternalServerErrorException(DI::l10n()->t('Invalid photo with id %s.', $photo["id"]));
 103                 }
 104
 105                 // if customsize is set and image is not a gif, resize it
 106                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
 107                         $img->scaleToSquare($customsize);
 108                 }
 109
 110                 if (function_exists("header_remove")) {
 111                         header_remove("Pragma");
 112                         header_remove("pragma");
 113                 }
 114
 115                 header("Content-type: " . $img->getType());
 116
 117                 if (!$cacheable) {
 118                         // it is a private photo that they have no permission to view.
 119                         // tell the browser not to cache it, in case they authenticate
 120                         // and subsequently have permission to see it
 121                         header("Cache-Control: no-store, no-cache, must-revalidate");
 122                 } else {
 123                         $md5 = md5($img->asString());
 124                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 125                         header("Etag: \"{$md5}\"");
 126                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 127                         header("Cache-Control: max-age=31536000");
 128                 }
 129
 130                 echo $img->asString();
 131
 132                 exit();
 133         }
 134
 135         private static function getAvatar($uid, $type="avatar")
 136         {
 137
 138                 switch($type) {
 139                 case "profile":
 140                 case "custom":
 141                         $scale = 4;
 142                         $default = "images/person-300.jpg";
 143                         break;
 144                 case "micro":
 145                         $scale = 6;
 146                         $default = "images/person-48.jpg";
 147                         break;
 148                 case "avatar":
 149                 default:
 150                         $scale = 5;
 151                         $default = "images/person-80.jpg";
 152                 }
 153
 154                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 155                 if ($photo === false) {
 156                         $photo = MPhoto::createPhotoForSystemResource($default);
 157                 }
 158                 return $photo;
 159         }
 160
 161 }