src/Module/Photo.php

   1 <?php
   2 /**
   3  * @file src/Module/Photo.php
   4  */
   5
   6 namespace Friendica\Module;
   7
   8 use Friendica\BaseModule;
   9 use Friendica\Core\L10n;
  10 use Friendica\Core\Logger;
  11 use Friendica\Core\System;
  12 use Friendica\Model\Photo as MPhoto;
  13 use Friendica\Object\Image;
  14
  15 /**
  16  * @brief Photo Module
  17  */
  18 class Photo extends BaseModule
  19 {
  20         /**
  21          * @brief Module initializer
  22          *
  23          * Fetch a photo or an avatar, in optional size, check for permissions and
  24          * return the image
  25          */
  26         public static function init()
  27         {
  28                 $a = self::getApp();
  29                 // @TODO: Replace with parameter from router
  30                 if ($a->argc <= 1 || $a->argc > 4) {
  31                         throw new \Friendica\Network\HTTPException\BadRequestException();
  32                 }
  33
  34                 if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
  35                         header("HTTP/1.1 304 Not Modified");
  36                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  37                         if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
  38                                 header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
  39                         }
  40                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  41                         header("Cache-Control: max-age=31536000");
  42                         if (function_exists("header_remove")) {
  43                                 header_remove("Last-Modified");
  44                                 header_remove("Expires");
  45                                 header_remove("Cache-Control");
  46                         }
  47                         exit;
  48                 }
  49
  50                 $customsize = 0;
  51                 $photo = false;
  52                 // @TODO: Replace with parameter from router
  53                 switch($a->argc) {
  54                         case 4:
  55                                 $customsize = intval($a->argv[2]);
  56                                 $uid = MPhoto::stripExtension($a->argv[3]);
  57                                 $photo = self::getAvatar($uid, $a->argv[1]);
  58                                 break;
  59                         case 3:
  60                                 $uid = MPhoto::stripExtension($a->argv[2]);
  61                                 $photo = self::getAvatar($uid, $a->argv[1]);
  62                                 break;
  63                         case 2:
  64                                 $photoid = MPhoto::stripExtension($a->argv[1]);
  65                                 $scale = 0;
  66                                 if (substr($photoid, -2, 1) == "-") {
  67                                         $scale = intval(substr($photoid, -1, 1));
  68                                         $photoid = substr($photoid, 0, -2);
  69                                 }
  70                                 $photo = MPhoto::getPhoto($photoid, $scale);
  71                                 if ($photo === false) {
  72                                         $photo = MPhoto::createPhotoForSystemResource("images/nosign.jpg");
  73                                 }
  74                                 break;
  75                 }
  76
  77                 if ($photo === false) {
  78                         System::httpExit('404', 'Not Found');
  79                 }
  80
  81                 $cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
  82
  83                 $img = MPhoto::getImageForPhoto($photo);
  84
  85                 if (is_null($img) || !$img->isValid()) {
  86                         Logger::log("Invalid photo with id {$photo["id"]}.");
  87                         throw new \Friendica\Network\HTTPException\InternalServerErrorException(L10n::t('Invalid photo with id %s.', $photo["id"]));
  88                 }
  89
  90                 // if customsize is set and image is not a gif, resize it
  91                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  92                         $img->scaleToSquare($customsize);
  93                 }
  94
  95                 if (function_exists("header_remove")) {
  96                         header_remove("Pragma");
  97                         header_remove("pragma");
  98                 }
  99
 100                 header("Content-type: " . $img->getType());
 101
 102                 if (!$cacheable) {
 103                         // it is a private photo that they have no permission to view.
 104                         // tell the browser not to cache it, in case they authenticate
 105                         // and subsequently have permission to see it
 106                         header("Cache-Control: no-store, no-cache, must-revalidate");
 107                 } else {
 108                         $md5 = md5($img->asString());
 109                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 110                         header("Etag: \"{$md5}\"");
 111                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 112                         header("Cache-Control: max-age=31536000");
 113                 }
 114
 115                 echo $img->asString();
 116
 117                 exit();
 118         }
 119
 120         private static function getAvatar($uid, $type="avatar")
 121         {
 122
 123                 switch($type) {
 124                 case "profile":
 125                 case "custom":
 126                         $scale = 4;
 127                         $default = "images/person-300.jpg";
 128                         break;
 129                 case "micro":
 130                         $scale = 6;
 131                         $default = "images/person-48.jpg";
 132                         break;
 133                 case "avatar":
 134                 default:
 135                         $scale = 5;
 136                         $default = "images/person-80.jpg";
 137                 }
 138
 139                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 140                 if ($photo === false) {
 141                         $photo = MPhoto::createPhotoForSystemResource($default);
 142                 }
 143                 return $photo;
 144         }
 145
 146 }