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\Logger;
  10 use Friendica\Core\System;
  11 use Friendica\Model\Photo as MPhoto;
  12 use Friendica\Object\Image;
  13
  14 /**
  15  * @brief Photo Module
  16  */
  17 class Photo extends BaseModule
  18 {
  19         /**
  20          * @brief Module initializer
  21          *
  22          * Fetch a photo or an avatar, in optional size, check for permissions and
  23          * return the image
  24          */
  25         public static function init()
  26         {
  27                 $a = self::getApp();
  28                 // @TODO: Replace with parameter from router
  29                 if ($a->argc <= 1 || $a->argc > 4) {
  30                         System::httpExit(400);
  31                 }
  32
  33                 if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
  34                         header("HTTP/1.1 304 Not Modified");
  35                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
  36                         if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
  37                                 header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
  38                         }
  39                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
  40                         header("Cache-Control: max-age=31536000");
  41                         if (function_exists("header_remove")) {
  42                                 header_remove("Last-Modified");
  43                                 header_remove("Expires");
  44                                 header_remove("Cache-Control");
  45                         }
  46                         exit;
  47                 }
  48
  49                 $customsize = 0;
  50                 $photo = false;
  51                 // @TODO: Replace with parameter from router
  52                 switch($a->argc) {
  53                         case 4:
  54                                 $customsize = intval($a->argv[2]);
  55                                 $uid = self::stripExtension($a->argv[3]);
  56                                 $photo = self::getAvatar($uid, $a->argv[1]);
  57                                 break;
  58                         case 3:
  59                                 $uid = self::stripExtension($a->argv[2]);
  60                                 $photo = self::getAvatar($uid, $a->argv[1]);
  61                                 break;
  62                         case 2:
  63                                 $photoid = self::stripExtension($a->argv[1]);
  64                                 $scale = 0;
  65                                 if (substr($photoid, -2, 1) == "-") {
  66                                         $scale = intval(substr($photoid, -1, 1));
  67                                         $photoid = substr($photoid, 0, -2);
  68                                 }
  69                                 $photo = MPhoto::getPhoto($photoid, $scale);
  70                                 if ($photo === false) {
  71                                         $photo = MPhoto::createPhotoForSystemResource("images/nosign.jpg");
  72                                 }
  73                                 break;
  74                 }
  75
  76                 if ($photo === false) {
  77                         // not using System::httpExit() because we don't want html here.
  78                         header($_SERVER["SERVER_PROTOCOL"] . " 404 Not Found" , true, 404);
  79                         exit();
  80                 }
  81
  82                 $cacheable = ($photo["allow_cid"] . $photo["allow_gid"] . $photo["deny_cid"] . $photo["deny_gid"] === "") && (isset($photo["cacheable"]) ? $photo["cacheable"] : true);
  83
  84                 $img = MPhoto::getImageForPhoto($photo);
  85
  86                 if (is_null($img) || !$img->isValid()) {
  87                         Logger::log("Invalid photo with id {$photo["id"]}.");
  88                         System::httpExit(500, ["description" => "Invalid photo with id {$photo["id"]}."]);
  89                 }
  90
  91                 // if customsize is set and image is not a gif, resize it
  92                 if ($img->getType() !== "image/gif" && $customsize > 0 && $customsize < 501) {
  93                         $img->scaleToSquare($customsize);
  94                 }
  95
  96                 if (function_exists("header_remove")) {
  97                         header_remove("Pragma");
  98                         header_remove("pragma");
  99                 }
 100
 101                 header("Content-type: " . $img->getType());
 102
 103                 if (!$cacheable) {
 104                         // it is a private photo that they have no permission to view.
 105                         // tell the browser not to cache it, in case they authenticate
 106                         // and subsequently have permission to see it
 107                         header("Cache-Control: no-store, no-cache, must-revalidate");
 108                 } else {
 109                         $md5 = md5($img->asString());
 110                         header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 111                         header("Etag: \"{$md5}\"");
 112                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
 113                         header("Cache-Control: max-age=31536000");
 114                 }
 115
 116                 echo $img->asString();
 117
 118                 exit();
 119         }
 120
 121         private static function stripExtension($name)
 122         {
 123                 $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
 124                 foreach (Image::supportedTypes() as $m => $e) {
 125                         $name = str_replace("." . $e, "", $name);
 126                 }
 127                 return $name;
 128         }
 129
 130         private static function getAvatar($uid, $type="avatar")
 131         {
 132
 133                 switch($type) {
 134                 case "profile":
 135                 case "custom":
 136                         $scale = 4;
 137                         $default = "images/person-300.jpg";
 138                         break;
 139                 case "micro":
 140                         $scale = 6;
 141                         $default = "images/person-48.jpg";
 142                         break;
 143                 case "avatar":
 144                 default:
 145                         $scale = 5;
 146                         $default = "images/person-80.jpg";
 147                 }
 148
 149                 $photo = MPhoto::selectFirst([], ["scale" => $scale, "uid" => $uid, "profile" => 1]);
 150                 if ($photo === false) {
 151                         $photo = MPhoto::createPhotoForSystemResource($default);
 152                 }
 153                 return $photo;
 154         }
 155
 156 }