src/Object/Photo.php

   1 <?php
   2 /**
   3  * @file src/Object/Photo.php
   4  * @brief This file contains the Photo class for image processing
   5  */
   6 namespace Friendica\Object;
   7
   8 use Friendica\App;
   9 use Friendica\Core\Cache;
  10 use Friendica\Core\Config;
  11 use Friendica\Core\System;
  12 use Friendica\Database\DBM;
  13
  14 require_once "include/photos.php";
  15
  16 /**
  17  * Class to handle Photos
  18  */
  19 class Photo
  20 {
  21         private $image;
  22
  23         /*
  24          * Put back gd stuff, not everybody have Imagick
  25          */
  26         private $imagick;
  27         private $width;
  28         private $height;
  29         private $valid;
  30         private $type;
  31         private $types;
  32
  33         /**
  34          * @brief supported mimetypes and corresponding file extensions
  35          */
  36         public static function supportedTypes()
  37         {
  38                 if (class_exists('Imagick')) {
  39                         // Imagick::queryFormats won't help us a lot there...
  40                         // At least, not yet, other parts of friendica uses this array
  41                         $t = array(
  42                                 'image/jpeg' => 'jpg',
  43                                 'image/png' => 'png',
  44                                 'image/gif' => 'gif'
  45                         );
  46                 } else {
  47                         $t = array();
  48                         $t['image/jpeg'] ='jpg';
  49                         if (imagetypes() & IMG_PNG) {
  50                                 $t['image/png'] = 'png';
  51                         }
  52                 }
  53
  54                 return $t;
  55         }
  56
  57         /**
  58          * @brief Constructor
  59          * @param object  $data data
  60          * @param boolean $type optional, default null
  61          * @return object
  62          */
  63         public function __construct($data, $type = null)
  64         {
  65                 $this->imagick = class_exists('Imagick');
  66                 $this->types = static::supportedTypes();
  67                 if (!array_key_exists($type, $this->types)) {
  68                         $type='image/jpeg';
  69                 }
  70                 $this->type = $type;
  71
  72                 if ($this->isImagick() && $this->loadData($data)) {
  73                         return true;
  74                 } else {
  75                         // Failed to load with Imagick, fallback
  76                         $this->imagick = false;
  77                 }
  78                 return $this->loadData($data);
  79         }
  80
  81         /**
  82          * @brief Destructor
  83          * @return void
  84          */
  85         public function __destruct()
  86         {
  87                 if ($this->image) {
  88                         if ($this->isImagick()) {
  89                                 $this->image->clear();
  90                                 $this->image->destroy();
  91                                 return;
  92                         }
  93                         if (is_resource($this->image)) {
  94                                 imagedestroy($this->image);
  95                         }
  96                 }
  97         }
  98
  99         /**
 100          * @return boolean
 101          */
 102         public function isImagick()
 103         {
 104                 return $this->imagick;
 105         }
 106
 107         /**
 108          * @brief Maps Mime types to Imagick formats
 109          * @return arr With with image formats (mime type as key)
 110          */
 111         public function getFormatsMap()
 112         {
 113                 $m = array(
 114                         'image/jpeg' => 'JPG',
 115                         'image/png' => 'PNG',
 116                         'image/gif' => 'GIF'
 117                 );
 118                 return $m;
 119         }
 120
 121         /**
 122          * @param object $data data
 123          * @return boolean
 124          */
 125         private function loadData($data)
 126         {
 127                 if ($this->isImagick()) {
 128                         $this->image = new Imagick();
 129                         try {
 130                                 $this->image->readImageBlob($data);
 131                         } catch (Exception $e) {
 132                                 // Imagick couldn't use the data
 133                                 return false;
 134                         }
 135
 136                         /*
 137                          * Setup the image to the format it will be saved to
 138                          */
 139                         $map = $this->getFormatsMap();
 140                         $format = $map[$type];
 141                         $this->image->setFormat($format);
 142
 143                         // Always coalesce, if it is not a multi-frame image it won't hurt anyway
 144                         $this->image = $this->image->coalesceImages();
 145
 146                         /*
 147                          * setup the compression here, so we'll do it only once
 148                          */
 149                         switch ($this->getType()) {
 150                                 case "image/png":
 151                                         $quality = Config::get('system', 'png_quality');
 152                                         if ((! $quality) || ($quality > 9)) {
 153                                                 $quality = PNG_QUALITY;
 154                                         }
 155                                         /*
 156                                          * From http://www.imagemagick.org/script/command-line-options.php#quality:
 157                                          *
 158                                          * 'For the MNG and PNG image formats, the quality value sets
 159                                          * the zlib compression level (quality / 10) and filter-type (quality % 10).
 160                                          * The default PNG "quality" is 75, which means compression level 7 with adaptive PNG filtering,
 161                                          * unless the image has a color map, in which case it means compression level 7 with no PNG filtering'
 162                                          */
 163                                         $quality = $quality * 10;
 164                                         $this->image->setCompressionQuality($quality);
 165                                         break;
 166                                 case "image/jpeg":
 167                                         $quality = Config::get('system', 'jpeg_quality');
 168                                         if ((! $quality) || ($quality > 100)) {
 169                                                 $quality = JPEG_QUALITY;
 170                                         }
 171                                         $this->image->setCompressionQuality($quality);
 172                         }
 173
 174                         // The 'width' and 'height' properties are only used by non-Imagick routines.
 175                         $this->width  = $this->image->getImageWidth();
 176                         $this->height = $this->image->getImageHeight();
 177                         $this->valid  = true;
 178
 179                         return true;
 180                 }
 181
 182                 $this->valid = false;
 183                 $this->image = @imagecreatefromstring($data);
 184                 if ($this->image !== false) {
 185                         $this->width  = imagesx($this->image);
 186                         $this->height = imagesy($this->image);
 187                         $this->valid  = true;
 188                         imagealphablending($this->image, false);
 189                         imagesavealpha($this->image, true);
 190
 191                         return true;
 192                 }
 193
 194                 return false;
 195         }
 196
 197         /**
 198          * @return boolean
 199          */
 200         public function isValid()
 201         {
 202                 if ($this->isImagick()) {
 203                         return ($this->image !== false);
 204                 }
 205                 return $this->valid;
 206         }
 207
 208         /**
 209          * @return mixed
 210          */
 211         public function getWidth()
 212         {
 213                 if (!$this->isValid()) {
 214                         return false;
 215                 }
 216
 217                 if ($this->isImagick()) {
 218                         return $this->image->getImageWidth();
 219                 }
 220                 return $this->width;
 221         }
 222
 223         /**
 224          * @return mixed
 225          */
 226         public function getHeight()
 227         {
 228                 if (!$this->isValid()) {
 229                         return false;
 230                 }
 231
 232                 if ($this->isImagick()) {
 233                         return $this->image->getImageHeight();
 234                 }
 235                 return $this->height;
 236         }
 237
 238         /**
 239          * @return mixed
 240          */
 241         public function getImage()
 242         {
 243                 if (!$this->isValid()) {
 244                         return false;
 245                 }
 246
 247                 if ($this->isImagick()) {
 248                         /* Clean it */
 249                         $this->image = $this->image->deconstructImages();
 250                         return $this->image;
 251                 }
 252                 return $this->image;
 253         }
 254
 255         /**
 256          * @return mixed
 257          */
 258         public function getType()
 259         {
 260                 if (!$this->isValid()) {
 261                         return false;
 262                 }
 263
 264                 return $this->type;
 265         }
 266
 267         /**
 268          * @return mixed
 269          */
 270         public function getExt()
 271         {
 272                 if (!$this->isValid()) {
 273                         return false;
 274                 }
 275
 276                 return $this->types[$this->getType()];
 277         }
 278
 279         /**
 280          * @param integer $max max dimension
 281          * @return mixed
 282          */
 283         public function scaleImage($max)
 284         {
 285                 if (!$this->isValid()) {
 286                         return false;
 287                 }
 288
 289                 $width = $this->getWidth();
 290                 $height = $this->getHeight();
 291
 292                 $dest_width = $dest_height = 0;
 293
 294                 if ((! $width)|| (! $height)) {
 295                         return false;
 296                 }
 297
 298                 if ($width > $max && $height > $max) {
 299                         // very tall image (greater than 16:9)
 300                         // constrain the width - let the height float.
 301
 302                         if ((($height * 9) / 16) > $width) {
 303                                 $dest_width = $max;
 304                                 $dest_height = intval(($height * $max) / $width);
 305                         } elseif ($width > $height) {
 306                                 // else constrain both dimensions
 307                                 $dest_width = $max;
 308                                 $dest_height = intval(($height * $max) / $width);
 309                         } else {
 310                                 $dest_width = intval(($width * $max) / $height);
 311                                 $dest_height = $max;
 312                         }
 313                 } else {
 314                         if ($width > $max) {
 315                                 $dest_width = $max;
 316                                 $dest_height = intval(($height * $max) / $width);
 317                         } else {
 318                                 if ($height > $max) {
 319                                         // very tall image (greater than 16:9)
 320                                         // but width is OK - don't do anything
 321
 322                                         if ((($height * 9) / 16) > $width) {
 323                                                 $dest_width = $width;
 324                                                 $dest_height = $height;
 325                                         } else {
 326                                                 $dest_width = intval(($width * $max) / $height);
 327                                                 $dest_height = $max;
 328                                         }
 329                                 } else {
 330                                         $dest_width = $width;
 331                                         $dest_height = $height;
 332                                 }
 333                         }
 334                 }
 335
 336
 337                 if ($this->isImagick()) {
 338                         /*
 339                          * If it is not animated, there will be only one iteration here,
 340                          * so don't bother checking
 341                          */
 342                         // Don't forget to go back to the first frame
 343                         $this->image->setFirstIterator();
 344                         do {
 345                                 // FIXME - implement horizantal bias for scaling as in followin GD functions
 346                                 // to allow very tall images to be constrained only horizontally.
 347
 348                                 $this->image->scaleImage($dest_width, $dest_height);
 349                         } while ($this->image->nextImage());
 350
 351                         // These may not be necessary any more
 352                         $this->width  = $this->image->getImageWidth();
 353                         $this->height = $this->image->getImageHeight();
 354
 355                         return;
 356                 }
 357
 358
 359                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 360                 imagealphablending($dest, false);
 361                 imagesavealpha($dest, true);
 362                 if ($this->type=='image/png') {
 363                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 364                 }
 365                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 366                 if ($this->image) {
 367                         imagedestroy($this->image);
 368                 }
 369                 $this->image = $dest;
 370                 $this->width  = imagesx($this->image);
 371                 $this->height = imagesy($this->image);
 372         }
 373
 374         /**
 375          * @param integer $degrees degrees to rotate image
 376          * @return mixed
 377          */
 378         public function rotate($degrees)
 379         {
 380                 if (!$this->isValid()) {
 381                         return false;
 382                 }
 383
 384                 if ($this->isImagick()) {
 385                         $this->image->setFirstIterator();
 386                         do {
 387                                 $this->image->rotateImage(new ImagickPixel(), -$degrees); // ImageMagick rotates in the opposite direction of imagerotate()
 388                         } while ($this->image->nextImage());
 389                         return;
 390                 }
 391
 392                 // if script dies at this point check memory_limit setting in php.ini
 393                 $this->image  = imagerotate($this->image, $degrees, 0);
 394                 $this->width  = imagesx($this->image);
 395                 $this->height = imagesy($this->image);
 396         }
 397
 398         /**
 399          * @param boolean $horiz optional, default true
 400          * @param boolean $vert  optional, default false
 401          * @return mixed
 402          */
 403         public function flip($horiz = true, $vert = false)
 404         {
 405                 if (!$this->isValid()) {
 406                         return false;
 407                 }
 408
 409                 if ($this->isImagick()) {
 410                         $this->image->setFirstIterator();
 411                         do {
 412                                 if ($horiz) {
 413                                         $this->image->flipImage();
 414                                 }
 415                                 if ($vert) {
 416                                         $this->image->flopImage();
 417                                 }
 418                         } while ($this->image->nextImage());
 419                         return;
 420                 }
 421
 422                 $w = imagesx($this->image);
 423                 $h = imagesy($this->image);
 424                 $flipped = imagecreate($w, $h);
 425                 if ($horiz) {
 426                         for ($x = 0; $x < $w; $x++) {
 427                                 imagecopy($flipped, $this->image, $x, 0, $w - $x - 1, 0, 1, $h);
 428                         }
 429                 }
 430                 if ($vert) {
 431                         for ($y = 0; $y < $h; $y++) {
 432                                 imagecopy($flipped, $this->image, 0, $y, 0, $h - $y - 1, $w, 1);
 433                         }
 434                 }
 435                 $this->image = $flipped;
 436         }
 437
 438         /**
 439          * @param string $filename filename
 440          * @return mixed
 441          */
 442         public function orient($filename)
 443         {
 444                 if ($this->isImagick()) {
 445                         // based off comment on http://php.net/manual/en/imagick.getimageorientation.php
 446                         $orientation = $this->image->getImageOrientation();
 447                         switch ($orientation) {
 448                                 case imagick::ORIENTATION_BOTTOMRIGHT:
 449                                         $this->image->rotateimage("#000", 180);
 450                                         break;
 451                                 case imagick::ORIENTATION_RIGHTTOP:
 452                                         $this->image->rotateimage("#000", 90);
 453                                         break;
 454                                 case imagick::ORIENTATION_LEFTBOTTOM:
 455                                         $this->image->rotateimage("#000", -90);
 456                                         break;
 457                         }
 458
 459                         $this->image->setImageOrientation(imagick::ORIENTATION_TOPLEFT);
 460                         return true;
 461                 }
 462                 // based off comment on http://php.net/manual/en/function.imagerotate.php
 463
 464                 if (!$this->isValid()) {
 465                         return false;
 466                 }
 467
 468                 if ((!function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg')) {
 469                         return;
 470                 }
 471
 472                 $exif = @exif_read_data($filename, null, true);
 473                 if (!$exif) {
 474                         return;
 475                 }
 476
 477                 $ort = $exif['IFD0']['Orientation'];
 478
 479                 switch ($ort) {
 480                         case 1: // nothing
 481                                 break;
 482
 483                         case 2: // horizontal flip
 484                                 $this->flip();
 485                                 break;
 486
 487                         case 3: // 180 rotate left
 488                                 $this->rotate(180);
 489                                 break;
 490
 491                         case 4: // vertical flip
 492                                 $this->flip(false, true);
 493                                 break;
 494
 495                         case 5: // vertical flip + 90 rotate right
 496                                 $this->flip(false, true);
 497                                 $this->rotate(-90);
 498                                 break;
 499
 500                         case 6: // 90 rotate right
 501                                 $this->rotate(-90);
 502                                 break;
 503
 504                         case 7: // horizontal flip + 90 rotate right
 505                                 $this->flip();
 506                                 $this->rotate(-90);
 507                                 break;
 508
 509                         case 8: // 90 rotate left
 510                                 $this->rotate(90);
 511                                 break;
 512                 }
 513
 514                 //      logger('exif: ' . print_r($exif,true));
 515                 return $exif;
 516         }
 517
 518         /**
 519          * @param integer $min minimum dimension
 520          * @return mixed
 521          */
 522         public function scaleImageUp($min)
 523         {
 524                 if (!$this->isValid()) {
 525                         return false;
 526                 }
 527
 528                 $width = $this->getWidth();
 529                 $height = $this->getHeight();
 530
 531                 $dest_width = $dest_height = 0;
 532
 533                 if ((!$width)|| (!$height)) {
 534                         return false;
 535                 }
 536
 537                 if ($width < $min && $height < $min) {
 538                         if ($width > $height) {
 539                                 $dest_width = $min;
 540                                 $dest_height = intval(($height * $min) / $width);
 541                         } else {
 542                                 $dest_width = intval(($width * $min) / $height);
 543                                 $dest_height = $min;
 544                         }
 545                 } else {
 546                         if ($width < $min) {
 547                                 $dest_width = $min;
 548                                 $dest_height = intval(($height * $min) / $width);
 549                         } else {
 550                                 if ($height < $min) {
 551                                         $dest_width = intval(($width * $min) / $height);
 552                                         $dest_height = $min;
 553                                 } else {
 554                                         $dest_width = $width;
 555                                         $dest_height = $height;
 556                                 }
 557                         }
 558                 }
 559
 560                 if ($this->isImagick()) {
 561                         return $this->scaleImage($dest_width, $dest_height);
 562                 }
 563
 564                 $dest = imagecreatetruecolor($dest_width, $dest_height);
 565                 imagealphablending($dest, false);
 566                 imagesavealpha($dest, true);
 567                 if ($this->type=='image/png') {
 568                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 569                 }
 570                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dest_width, $dest_height, $width, $height);
 571                 if ($this->image) {
 572                         imagedestroy($this->image);
 573                 }
 574                 $this->image = $dest;
 575                 $this->width  = imagesx($this->image);
 576                 $this->height = imagesy($this->image);
 577         }
 578
 579         /**
 580          * @param integer $dim dimension
 581          * @return mixed
 582          */
 583         public function scaleImageSquare($dim)
 584         {
 585                 if (!$this->isValid()) {
 586                         return false;
 587                 }
 588
 589                 if ($this->isImagick()) {
 590                         $this->image->setFirstIterator();
 591                         do {
 592                                 $this->image->scaleImage($dim, $dim);
 593                         } while ($this->image->nextImage());
 594                         return;
 595                 }
 596
 597                 $dest = imagecreatetruecolor($dim, $dim);
 598                 imagealphablending($dest, false);
 599                 imagesavealpha($dest, true);
 600                 if ($this->type=='image/png') {
 601                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 602                 }
 603                 imagecopyresampled($dest, $this->image, 0, 0, 0, 0, $dim, $dim, $this->width, $this->height);
 604                 if ($this->image) {
 605                         imagedestroy($this->image);
 606                 }
 607                 $this->image = $dest;
 608                 $this->width  = imagesx($this->image);
 609                 $this->height = imagesy($this->image);
 610         }
 611
 612         /**
 613          * @param integer $max maximum
 614          * @param integer $x   x coordinate
 615          * @param integer $y   y coordinate
 616          * @param integer $w   width
 617          * @param integer $h   height
 618          * @return mixed
 619          */
 620         public function cropImage($max, $x, $y, $w, $h)
 621         {
 622                 if (!$this->isValid()) {
 623                         return false;
 624                 }
 625
 626                 if ($this->isImagick()) {
 627                         $this->image->setFirstIterator();
 628                         do {
 629                                 $this->image->cropImage($w, $h, $x, $y);
 630                                 /*
 631                                  * We need to remove the canva,
 632                                  * or the image is not resized to the crop:
 633                                  * http://php.net/manual/en/imagick.cropimage.php#97232
 634                                  */
 635                                 $this->image->setImagePage(0, 0, 0, 0);
 636                         } while ($this->image->nextImage());
 637                         return $this->scaleImage($max);
 638                 }
 639
 640                 $dest = imagecreatetruecolor($max, $max);
 641                 imagealphablending($dest, false);
 642                 imagesavealpha($dest, true);
 643                 if ($this->type=='image/png') {
 644                         imagefill($dest, 0, 0, imagecolorallocatealpha($dest, 0, 0, 0, 127)); // fill with alpha
 645                 }
 646                 imagecopyresampled($dest, $this->image, 0, 0, $x, $y, $max, $max, $w, $h);
 647                 if ($this->image) {
 648                         imagedestroy($this->image);
 649                 }
 650                 $this->image = $dest;
 651                 $this->width  = imagesx($this->image);
 652                 $this->height = imagesy($this->image);
 653         }
 654
 655         /**
 656          * @param string $path file path
 657          * @return mixed
 658          */
 659         public function saveImage($path)
 660         {
 661                 if (!$this->isValid()) {
 662                         return false;
 663                 }
 664
 665                 $string = $this->imageString();
 666
 667                 $a = get_app();
 668
 669                 $stamp1 = microtime(true);
 670                 file_put_contents($path, $string);
 671                 $a->save_timestamp($stamp1, "file");
 672         }
 673
 674         /**
 675          * @return mixed
 676          */
 677         public function imageString()
 678         {
 679                 if (!$this->isValid()) {
 680                         return false;
 681                 }
 682
 683                 if ($this->isImagick()) {
 684                         /* Clean it */
 685                         $this->image = $this->image->deconstructImages();
 686                         $string = $this->image->getImagesBlob();
 687                         return $string;
 688                 }
 689
 690                 $quality = false;
 691
 692                 ob_start();
 693
 694                 // Enable interlacing
 695                 imageinterlace($this->image, true);
 696
 697                 switch ($this->getType()) {
 698                         case "image/png":
 699                                 $quality = Config::get('system', 'png_quality');
 700                                 if ((!$quality) || ($quality > 9)) {
 701                                         $quality = PNG_QUALITY;
 702                                 }
 703                                 imagepng($this->image, null, $quality);
 704                                 break;
 705                         case "image/jpeg":
 706                                 $quality = Config::get('system', 'jpeg_quality');
 707                                 if ((!$quality) || ($quality > 100)) {
 708                                         $quality = JPEG_QUALITY;
 709                                 }
 710                                 imagejpeg($this->image, null, $quality);
 711                 }
 712                 $string = ob_get_contents();
 713                 ob_end_clean();
 714
 715                 return $string;
 716         }
 717
 718         /**
 719          * @param integer $uid       uid
 720          * @param integer $cid       cid
 721          * @param integer $rid       rid
 722          * @param string  $filename  filename
 723          * @param string  $album     album name
 724          * @param integer $scale     scale
 725          * @param integer $profile   optional, default = 0
 726          * @param string  $allow_cid optional, default = ''
 727          * @param string  $allow_gid optional, default = ''
 728          * @param string  $deny_cid  optional, default = ''
 729          * @param string  $deny_gid  optional, default = ''
 730          * @param string  $desc      optional, default = ''
 731          * @return object
 732          */
 733         public function store($uid, $cid, $rid, $filename, $album, $scale, $profile = 0, $allow_cid = '', $allow_gid = '', $deny_cid = '', $deny_gid = '', $desc = '')
 734         {
 735                 $r = dba::select('photo', array('guid'), array("`resource-id` = ? AND `guid` != ?", $rid, ''), array('limit' => 1));
 736                 if (DBM::is_result($r)) {
 737                         $guid = $r['guid'];
 738                 } else {
 739                         $guid = get_guid();
 740                 }
 741
 742                 $x = dba::select('photo', array('id'), array('resource-id' => $rid, 'uid' => $uid, 'contact-id' => $cid, 'scale' => $scale), array('limit' => 1));
 743
 744                 $fields = array('uid' => $uid, 'contact-id' => $cid, 'guid' => $guid, 'resource-id' => $rid, 'created' => datetime_convert(), 'edited' => datetime_convert(),
 745                                 'filename' => basename($filename), 'type' => $this->getType(), 'album' => $album, 'height' => $this->getHeight(), 'width' => $this->getWidth(),
 746                                 'datasize' => strlen($this->imageString()), 'data' => $this->imageString(), 'scale' => $scale, 'profile' => $profile,
 747                                 'allow_cid' => $allow_cid, 'allow_gid' => $allow_gid, 'deny_cid' => $deny_cid, 'deny_gid' => $deny_gid, 'desc' => $desc);
 748
 749                 if (DBM::is_result($x)) {
 750                         $r = dba::update('photo', $fields, array('id' => $x['id']));
 751                 } else {
 752                         $r = dba::insert('photo', $fields);
 753                 }
 754
 755                 return $r;
 756         }
 757
 758         /**
 759          * Guess image mimetype from filename or from Content-Type header
 760          *
 761          * @param string  $filename Image filename
 762          * @param boolean $fromcurl Check Content-Type header from curl request
 763          *
 764          * @return object
 765          */
 766         public function guessImageType($filename, $fromcurl = false)
 767         {
 768                 logger('Photo: guessImageType: '.$filename . ($fromcurl?' from curl headers':''), LOGGER_DEBUG);
 769                 $type = null;
 770                 if ($fromcurl) {
 771                         $a = get_app();
 772                         $headers=array();
 773                         $h = explode("\n", $a->get_curl_headers());
 774                         foreach ($h as $l) {
 775                                 list($k,$v) = array_map("trim", explode(":", trim($l), 2));
 776                                 $headers[$k] = $v;
 777                         }
 778                         if (array_key_exists('Content-Type', $headers))
 779                                 $type = $headers['Content-Type'];
 780                 }
 781                 if (is_null($type)) {
 782                         // Guessing from extension? Isn't that... dangerous?
 783                         if (class_exists('Imagick') && file_exists($filename) && is_readable($filename)) {
 784                                 /**
 785                                  * Well, this not much better,
 786                                  * but at least it comes from the data inside the image,
 787                                  * we won't be tricked by a manipulated extension
 788                                  */
 789                                 $image = new Imagick($filename);
 790                                 $type = $image->getImageMimeType();
 791                                 $image->setInterlaceScheme(Imagick::INTERLACE_PLANE);
 792                         } else {
 793                                 $ext = pathinfo($filename, PATHINFO_EXTENSION);
 794                                 $types = $this->supportedTypes();
 795                                 $type = "image/jpeg";
 796                                 foreach ($types as $m => $e) {
 797                                         if ($ext == $e) {
 798                                                 $type = $m;
 799                                         }
 800                                 }
 801                         }
 802                 }
 803                 logger('Photo: guessImageType: type='.$type, LOGGER_DEBUG);
 804                 return $type;
 805         }
 806
 807         /**
 808          * @brief Updates the avatar links in a contact only if needed
 809          *
 810          * @param string $avatar Link to avatar picture
 811          * @param int    $uid    User id of contact owner
 812          * @param int    $cid    Contact id
 813          * @param bool   $force  force picture update
 814          *
 815          * @return array Returns array of the different avatar sizes
 816          */
 817         public function updateContactAvatar($avatar, $uid, $cid, $force = false)
 818         {
 819                 // Limit = 1 returns the row so no need for dba:inArray()
 820                 $r = dba::select('contact', array('avatar', 'photo', 'thumb', 'micro', 'nurl'), array('id' => $cid), array('limit' => 1));
 821                 if (!DBM::is_result($r)) {
 822                         return false;
 823                 } else {
 824                         $data = array($r["photo"], $r["thumb"], $r["micro"]);
 825                 }
 826
 827                 if (($r["avatar"] != $avatar) || $force) {
 828                         $photos = $this->importProfilePhoto($avatar, $uid, $cid, true);
 829
 830                         if ($photos) {
 831                                 dba::update(
 832                                         'contact',
 833                                         array('avatar' => $avatar, 'photo' => $photos[0], 'thumb' => $photos[1], 'micro' => $photos[2], 'avatar-date' => datetime_convert()),
 834                                         array('id' => $cid)
 835                                 );
 836
 837                                 // Update the public contact (contact id = 0)
 838                                 if ($uid != 0) {
 839                                         $pcontact = dba::select('contact', array('id'), array('nurl' => $r[0]['nurl']), array('limit' => 1));
 840                                         if (DBM::is_result($pcontact)) {
 841                                                 $this->updateContactAvatar($avatar, 0, $pcontact['id'], $force);
 842                                         }
 843                                 }
 844
 845                                 return $photos;
 846                         }
 847                 }
 848
 849                 return $data;
 850         }
 851
 852         /**
 853          * @param string  $photo         photo
 854          * @param integer $uid           user id
 855          * @param integer $cid           contact id
 856          * @param boolean $quit_on_error optional, default false
 857          * @return array
 858          */
 859         private function importProfilePhoto($photo, $uid, $cid, $quit_on_error = false)
 860         {
 861                 $r = dba::select(
 862                         'photo',
 863                         array('resource-id'),
 864                         array('uid' => $uid, 'contact-id' => $cid, 'scale' => 4, 'album' => 'Contact Photos'),
 865                         array('limit' => 1)
 866                 );
 867
 868                 if (DBM::is_result($r) && strlen($r['resource-id'])) {
 869                         $hash = $r['resource-id'];
 870                 } else {
 871                         $hash = photo_new_resource();
 872                 }
 873
 874                 $photo_failure = false;
 875
 876                 $filename = basename($photo);
 877                 $img_str = fetch_url($photo, true);
 878
 879                 if ($quit_on_error && ($img_str == "")) {
 880                         return false;
 881                 }
 882
 883                 $type = $this->guessImageType($photo, true);
 884                 $img = new Photo($img_str, $type);
 885                 if ($img->isValid()) {
 886                         $img->scaleImageSquare(175);
 887
 888                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 4);
 889
 890                         if ($r === false) {
 891                                 $photo_failure = true;
 892                         }
 893
 894                         $img->scaleImage(80);
 895
 896                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 5);
 897
 898                         if ($r === false) {
 899                                 $photo_failure = true;
 900                         }
 901
 902                         $img->scaleImage(48);
 903
 904                         $r = $img->store($uid, $cid, $hash, $filename, 'Contact Photos', 6);
 905
 906                         if ($r === false) {
 907                                 $photo_failure = true;
 908                         }
 909
 910                         $suffix = '?ts='.time();
 911
 912                         $photo = System::baseUrl() . '/photo/' . $hash . '-4.' . $img->getExt() . $suffix;
 913                         $thumb = System::baseUrl() . '/photo/' . $hash . '-5.' . $img->getExt() . $suffix;
 914                         $micro = System::baseUrl() . '/photo/' . $hash . '-6.' . $img->getExt() . $suffix;
 915
 916                         // Remove the cached photo
 917                         $a = get_app();
 918                         $basepath = $a->get_basepath();
 919
 920                         if (is_dir($basepath."/photo")) {
 921                                 $filename = $basepath.'/photo/'.$hash.'-4.'.$img->getExt();
 922                                 if (file_exists($filename)) {
 923                                         unlink($filename);
 924                                 }
 925                                 $filename = $basepath.'/photo/'.$hash.'-5.'.$img->getExt();
 926                                 if (file_exists($filename)) {
 927                                         unlink($filename);
 928                                 }
 929                                 $filename = $basepath.'/photo/'.$hash.'-6.'.$img->getExt();
 930                                 if (file_exists($filename)) {
 931                                         unlink($filename);
 932                                 }
 933                         }
 934                 } else {
 935                         $photo_failure = true;
 936                 }
 937
 938                 if ($photo_failure && $quit_on_error) {
 939                         return false;
 940                 }
 941
 942                 if ($photo_failure) {
 943                         $photo = System::baseUrl() . '/images/person-175.jpg';
 944                         $thumb = System::baseUrl() . '/images/person-80.jpg';
 945                         $micro = System::baseUrl() . '/images/person-48.jpg';
 946                 }
 947
 948                 return(array($photo, $thumb, $micro));
 949         }
 950
 951         /**
 952          * @param string $url url
 953          * @return object
 954          */
 955         public function getPhotoInfo($url)
 956         {
 957                 $data = array();
 958
 959                 $data = Cache::get($url);
 960
 961                 if (is_null($data) || !$data || !is_array($data)) {
 962                         $img_str = fetch_url($url, true, $redirects, 4);
 963                         $filesize = strlen($img_str);
 964
 965                         if (function_exists("getimagesizefromstring")) {
 966                                 $data = getimagesizefromstring($img_str);
 967                         } else {
 968                                 $tempfile = tempnam(get_temppath(), "cache");
 969
 970                                 $a = get_app();
 971                                 $stamp1 = microtime(true);
 972                                 file_put_contents($tempfile, $img_str);
 973                                 $a->save_timestamp($stamp1, "file");
 974
 975                                 $data = getimagesize($tempfile);
 976                                 unlink($tempfile);
 977                         }
 978
 979                         if ($data) {
 980                                 $data["size"] = $filesize;
 981                         }
 982
 983                         Cache::set($url, $data);
 984                 }
 985
 986                 return $data;
 987         }
 988
 989         /**
 990          * @param integer $width  width
 991          * @param integer $height height
 992          * @param integer $max    max
 993          * @return array
 994          */
 995         public function scaleImageTo($width, $height, $max)
 996         {
 997                 $dest_width = $dest_height = 0;
 998
 999                 if ((!$width) || (!$height)) {
1000                         return false;
1001                 }
1002
1003                 if ($width > $max && $height > $max) {
1004                         // very tall image (greater than 16:9)
1005                         // constrain the width - let the height float.
1006
1007                         if ((($height * 9) / 16) > $width) {
1008                                 $dest_width = $max;
1009                                 $dest_height = intval(($height * $max) / $width);
1010                         } elseif ($width > $height) {
1011                                 // else constrain both dimensions
1012                                 $dest_width = $max;
1013                                 $dest_height = intval(($height * $max) / $width);
1014                         } else {
1015                                 $dest_width = intval(($width * $max) / $height);
1016                                 $dest_height = $max;
1017                         }
1018                 } else {
1019                         if ($width > $max) {
1020                                 $dest_width = $max;
1021                                 $dest_height = intval(($height * $max) / $width);
1022                         } else {
1023                                 if ($height > $max) {
1024                                         // very tall image (greater than 16:9)
1025                                         // but width is OK - don't do anything
1026
1027                                         if ((($height * 9) / 16) > $width) {
1028                                                 $dest_width = $width;
1029                                                 $dest_height = $height;
1030                                         } else {
1031                                                 $dest_width = intval(($width * $max) / $height);
1032                                                 $dest_height = $max;
1033                                         }
1034                                 } else {
1035                                         $dest_width = $width;
1036                                         $dest_height = $height;
1037                                 }
1038                         }
1039                 }
1040                 return array("width" => $dest_width, "height" => $dest_height);
1041         }
1042
1043         /**
1044          * @brief This function doesn't seem to be used
1045          * @param object  $a         App
1046          * @param integer $uid       user id
1047          * @param string  $imagedata optional, default empty
1048          * @param string  $url       optional, default empty
1049          * @return array
1050          */
1051         private function storePhoto(App $a, $uid, $imagedata = "", $url = "")
1052         {
1053                 $r = q(
1054                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
1055                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
1056                         intval($uid)
1057                 );
1058
1059                 if (!DBM::is_result($r)) {
1060                         logger("Can't detect user data for uid ".$uid, LOGGER_DEBUG);
1061                         return(array());
1062                 }
1063
1064                 $page_owner_nick  = $r[0]['nickname'];
1065
1066                 /// @TODO
1067                 /// $default_cid      = $r[0]['id'];
1068                 /// $community_page   = (($r[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
1069
1070                 if ((strlen($imagedata) == 0) && ($url == "")) {
1071                         logger("No image data and no url provided", LOGGER_DEBUG);
1072                         return(array());
1073                 } elseif (strlen($imagedata) == 0) {
1074                         logger("Uploading picture from ".$url, LOGGER_DEBUG);
1075
1076                         $stamp1 = microtime(true);
1077                         $imagedata = @file_get_contents($url);
1078                         $a->save_timestamp($stamp1, "file");
1079                 }
1080
1081                 $maximagesize = Config::get('system', 'maximagesize');
1082
1083                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
1084                         logger("Image exceeds size limit of ".$maximagesize, LOGGER_DEBUG);
1085                         return(array());
1086                 }
1087
1088                 $tempfile = tempnam(get_temppath(), "cache");
1089
1090                 $stamp1 = microtime(true);
1091                 file_put_contents($tempfile, $imagedata);
1092                 $a->save_timestamp($stamp1, "file");
1093
1094                 $data = getimagesize($tempfile);
1095
1096                 if (!isset($data["mime"])) {
1097                         unlink($tempfile);
1098                         logger("File is no picture", LOGGER_DEBUG);
1099                         return(array());
1100                 }
1101
1102                 $ph = new Photo($imagedata, $data["mime"]);
1103
1104                 if (!$ph->isValid()) {
1105                         unlink($tempfile);
1106                         logger("Picture is no valid picture", LOGGER_DEBUG);
1107                         return(array());
1108                 }
1109
1110                 $ph->orient($tempfile);
1111                 unlink($tempfile);
1112
1113                 $max_length = Config::get('system', 'max_image_length');
1114                 if (! $max_length) {
1115                         $max_length = MAX_IMAGE_LENGTH;
1116                 }
1117                 if ($max_length > 0) {
1118                         $ph->scaleImage($max_length);
1119                 }
1120
1121                 $width = $ph->getWidth();
1122                 $height = $ph->getHeight();
1123
1124                 $hash = photo_new_resource();
1125
1126                 $smallest = 0;
1127
1128                 // Pictures are always public by now
1129                 //$defperm = '<'.$default_cid.'>';
1130                 $defperm = "";
1131                 $visitor = 0;
1132
1133                 $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 0, 0, $defperm);
1134
1135                 if (!$r) {
1136                         logger("Picture couldn't be stored", LOGGER_DEBUG);
1137                         return(array());
1138                 }
1139
1140                 $image = array("page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
1141                                 "full" => System::baseUrl()."/photo/{$hash}-0.".$ph->getExt());
1142
1143                 if ($width > 800 || $height > 800) {
1144                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$ph->getExt();
1145                 }
1146
1147                 if ($width > 640 || $height > 640) {
1148                         $ph->scaleImage(640);
1149                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 1, 0, $defperm);
1150                         if ($r) {
1151                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$ph->getExt();
1152                         }
1153                 }
1154
1155                 if ($width > 320 || $height > 320) {
1156                         $ph->scaleImage(320);
1157                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 2, 0, $defperm);
1158                         if ($r) {
1159                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$ph->getExt();
1160                         }
1161                 }
1162
1163                 if ($width > 160 && $height > 160) {
1164                         $x = 0;
1165                         $y = 0;
1166
1167                         $min = $ph->getWidth();
1168                         if ($min > 160) {
1169                                 $x = ($min - 160) / 2;
1170                         }
1171
1172                         if ($ph->getHeight() < $min) {
1173                                 $min = $ph->getHeight();
1174                                 if ($min > 160) {
1175                                         $y = ($min - 160) / 2;
1176                                 }
1177                         }
1178
1179                         $min = 160;
1180                         $ph->cropImage(160, $x, $y, $min, $min);
1181
1182                         $r = $ph->store($uid, $visitor, $hash, $tempfile, t('Wall Photos'), 3, 0, $defperm);
1183                         if ($r) {
1184                                 $image["thumb"] = System::baseUrl()."/photo/{$hash}-3.".$ph->getExt();
1185                         }
1186                 }
1187
1188                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
1189                 $image["preview"] = $image["full"];
1190
1191                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
1192                 //if (isset($image["thumb"]))
1193                 //      $image["preview"] = $image["thumb"];
1194
1195                 // Unsure, if this should be activated or deactivated
1196                 //if (isset($image["small"]))
1197                 //      $image["preview"] = $image["small"];
1198
1199                 if (isset($image["medium"])) {
1200                         $image["preview"] = $image["medium"];
1201                 }
1202
1203                 return($image);
1204         }
1205 }