src/Model/Photo.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Photo.php
   5  * @brief This file contains the Photo class for database interface
   6  */
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Core\Cache;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\L10n;
  13 use Friendica\Core\StorageManager;
  14 use Friendica\Core\System;
  15 use Friendica\Database\DBA;
  16 use Friendica\Database\DBStructure;
  17 use Friendica\Model\Storage\IStorage;
  18 use Friendica\Object\Image;
  19 use Friendica\Util\DateTimeFormat;
  20 use Friendica\Util\Network;
  21 use Friendica\Util\Security;
  22
  23 require_once "include/dba.php";
  24
  25 /**
  26  * Class to handle photo dabatase table
  27  */
  28 class Photo extends BaseObject
  29 {
  30         /**
  31          * @brief Select rows from the photo table
  32          *
  33          * @param array $fields     Array of selected fields, empty for all
  34          * @param array $conditions Array of fields for conditions
  35          * @param array $params     Array of several parameters
  36          *
  37          * @return boolean|array
  38          *
  39          * @throws \Exception
  40          * @see   \Friendica\Database\DBA::select
  41          */
  42         public static function select(array $fields = [], array $conditions = [], array $params = [])
  43         {
  44                 if (empty($fields)) {
  45                         $fields = self::getFields();
  46                 }
  47
  48                 $r = DBA::select("photo", $fields, $conditions, $params);
  49                 return DBA::toArray($r);
  50         }
  51
  52         /**
  53          * @brief Retrieve a single record from the photo table
  54          *
  55          * @param array $fields     Array of selected fields, empty for all
  56          * @param array $conditions Array of fields for conditions
  57          * @param array $params     Array of several parameters
  58          *
  59          * @return bool|array
  60          *
  61          * @throws \Exception
  62          * @see   \Friendica\Database\DBA::select
  63          */
  64         public static function selectFirst(array $fields = [], array $conditions = [], array $params = [])
  65         {
  66                 if (empty($fields)) {
  67                         $fields = self::getFields();
  68                 }
  69
  70                 return DBA::selectFirst("photo", $fields, $conditions, $params);
  71         }
  72
  73         /**
  74          * @brief Get photos for user id
  75          *
  76          * @param integer $uid        User id
  77          * @param string  $resourceid Rescource ID of the photo
  78          * @param array   $conditions Array of fields for conditions
  79          * @param array   $params     Array of several parameters
  80          *
  81          * @return bool|array
  82          *
  83          * @throws \Exception
  84          * @see   \Friendica\Database\DBA::select
  85          */
  86         public static function getPhotosForUser($uid, $resourceid, array $conditions = [], array $params = [])
  87         {
  88                 $conditions["resource-id"] = $resourceid;
  89                 $conditions["uid"] = $uid;
  90
  91                 return self::select([], $conditions, $params);
  92         }
  93
  94         /**
  95          * @brief Get a photo for user id
  96          *
  97          * @param integer $uid        User id
  98          * @param string  $resourceid Rescource ID of the photo
  99          * @param integer $scale      Scale of the photo. Defaults to 0
 100          * @param array   $conditions Array of fields for conditions
 101          * @param array   $params     Array of several parameters
 102          *
 103          * @return bool|array
 104          *
 105          * @throws \Exception
 106          * @see   \Friendica\Database\DBA::select
 107          */
 108         public static function getPhotoForUser($uid, $resourceid, $scale = 0, array $conditions = [], array $params = [])
 109         {
 110                 $conditions["resource-id"] = $resourceid;
 111                 $conditions["uid"] = $uid;
 112                 $conditions["scale"] = $scale;
 113
 114                 return self::selectFirst([], $conditions, $params);
 115         }
 116
 117         /**
 118          * @brief Get a single photo given resource id and scale
 119          *
 120          * This method checks for permissions. Returns associative array
 121          * on success, "no sign" image info, if user has no permission,
 122          * false if photo does not exists
 123          *
 124          * @param string  $resourceid Rescource ID of the photo
 125          * @param integer $scale      Scale of the photo. Defaults to 0
 126          *
 127          * @return boolean|array
 128          * @throws \Exception
 129          */
 130         public static function getPhoto($resourceid, $scale = 0)
 131         {
 132                 $r = self::selectFirst(["uid"], ["resource-id" => $resourceid]);
 133                 if ($r === false) {
 134                         return false;
 135                 }
 136
 137                 $sql_acl = Security::getPermissionsSQLByUserId($r["uid"]);
 138
 139                 $conditions = [
 140                         "`resource-id` = ? AND `scale` <= ? " . $sql_acl,
 141                         $resourceid, $scale
 142                 ];
 143
 144                 $params = ["order" => ["scale" => true]];
 145
 146                 $photo = self::selectFirst([], $conditions, $params);
 147
 148                 return $photo;
 149         }
 150
 151         /**
 152          * @brief Check if photo with given conditions exists
 153          *
 154          * @param array $conditions Array of extra conditions
 155          *
 156          * @return boolean
 157          * @throws \Exception
 158          */
 159         public static function exists(array $conditions)
 160         {
 161                 return DBA::exists("photo", $conditions);
 162         }
 163
 164
 165         /**
 166          * @brief Get Image object for given row id. null if row id does not exist
 167          *
 168          * @param array $photo Photo data. Needs at least 'id', 'type', 'backend-class', 'backend-ref'
 169          *
 170          * @return \Friendica\Object\Image
 171          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 172          * @throws \ImagickException
 173          */
 174         public static function getImageForPhoto(array $photo)
 175         {
 176                 $data = "";
 177
 178                 if ($photo["backend-class"] == "") {
 179                         // legacy data storage in "data" column
 180                         $i = self::selectFirst(["data"], ["id" => $photo["id"]]);
 181                         if ($i === false) {
 182                                 return null;
 183                         }
 184                         $data = $i["data"];
 185                 } else {
 186                         $backendClass = $photo["backend-class"];
 187                         $backendRef = $photo["backend-ref"];
 188                         $data = $backendClass::get($backendRef);
 189                 }
 190
 191                 if ($data === "") {
 192                         return null;
 193                 }
 194
 195                 return new Image($data, $photo["type"]);
 196         }
 197
 198         /**
 199          * @brief Return a list of fields that are associated with the photo table
 200          *
 201          * @return array field list
 202          * @throws \Exception
 203          */
 204         private static function getFields()
 205         {
 206                 $allfields = DBStructure::definition(self::getApp()->getBasePath(), false);
 207                 $fields = array_keys($allfields["photo"]["fields"]);
 208                 array_splice($fields, array_search("data", $fields), 1);
 209                 return $fields;
 210         }
 211
 212         /**
 213          * @brief Construct a photo array for a system resource image
 214          *
 215          * @param string $filename Image file name relative to code root
 216          * @param string $mimetype Image mime type. Defaults to "image/jpeg"
 217          *
 218          * @return array
 219          * @throws \Exception
 220          */
 221         public static function createPhotoForSystemResource($filename, $mimetype = "image/jpeg")
 222         {
 223                 $fields = self::getFields();
 224                 $values = array_fill(0, count($fields), "");
 225
 226                 $photo = array_combine($fields, $values);
 227                 $photo["backend-class"] = Storage\SystemResource::class;
 228                 $photo["backend-ref"] = $filename;
 229                 $photo["type"] = $mimetype;
 230                 $photo["cacheable"] = false;
 231
 232                 return $photo;
 233         }
 234
 235
 236         /**
 237          * @brief store photo metadata in db and binary in default backend
 238          *
 239          * @param Image   $Image     Image object with data
 240          * @param integer $uid       User ID
 241          * @param integer $cid       Contact ID
 242          * @param integer $rid       Resource ID
 243          * @param string  $filename  Filename
 244          * @param string  $album     Album name
 245          * @param integer $scale     Scale
 246          * @param integer $profile   Is a profile image? optional, default = 0
 247          * @param string  $allow_cid Permissions, allowed contacts. optional, default = ""
 248          * @param string  $allow_gid Permissions, allowed groups. optional, default = ""
 249          * @param string  $deny_cid  Permissions, denied contacts.optional, default = ""
 250          * @param string  $deny_gid  Permissions, denied greoup.optional, default = ""
 251          * @param string  $desc      Photo caption. optional, default = ""
 252          *
 253          * @return boolean True on success
 254          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 255          */
 256         public static function store(Image $Image, $uid, $cid, $rid, $filename, $album, $scale, $profile = 0, $allow_cid = "", $allow_gid = "", $deny_cid = "", $deny_gid = "", $desc = "")
 257         {
 258                 $photo = self::selectFirst(["guid"], ["`resource-id` = ? AND `guid` != ?", $rid, ""]);
 259                 if (DBA::isResult($photo)) {
 260                         $guid = $photo["guid"];
 261                 } else {
 262                         $guid = System::createGUID();
 263                 }
 264
 265                 $existing_photo = self::selectFirst(["id", "created", "backend-class", "backend-ref"], ["resource-id" => $rid, "uid" => $uid, "contact-id" => $cid, "scale" => $scale]);
 266                 $created = DateTimeFormat::utcNow();
 267                 if (DBA::isResult($existing_photo)) {
 268                         $created = $existing_photo["created"];
 269                 }
 270
 271                 // Get defined storage backend.
 272                 // if no storage backend, we use old "data" column in photo table.
 273                 // if is an existing photo, reuse same backend
 274                 $data = "";
 275                 $backend_ref = "";
 276
 277                 /** @var IStorage $backend_class */
 278                 if (DBA::isResult($existing_photo)) {
 279                         $backend_ref = (string)$existing_photo["backend-ref"];
 280                         $backend_class = (string)$existing_photo["backend-class"];
 281                 } else {
 282                         $backend_class = StorageManager::getBackend();
 283                 }
 284
 285                 if ($backend_class === "") {
 286                         $data = $Image->asString();
 287                 } else {
 288                         $backend_ref = $backend_class::put($Image->asString(), $backend_ref);
 289                 }
 290
 291
 292                 $fields = [
 293                         "uid" => $uid,
 294                         "contact-id" => $cid,
 295                         "guid" => $guid,
 296                         "resource-id" => $rid,
 297                         "created" => $created,
 298                         "edited" => DateTimeFormat::utcNow(),
 299                         "filename" => basename($filename),
 300                         "type" => $Image->getType(),
 301                         "album" => $album,
 302                         "height" => $Image->getHeight(),
 303                         "width" => $Image->getWidth(),
 304                         "datasize" => strlen($Image->asString()),
 305                         "data" => $data,
 306                         "scale" => $scale,
 307                         "profile" => $profile,
 308                         "allow_cid" => $allow_cid,
 309                         "allow_gid" => $allow_gid,
 310                         "deny_cid" => $deny_cid,
 311                         "deny_gid" => $deny_gid,
 312                         "desc" => $desc,
 313                         "backend-class" => $backend_class,
 314                         "backend-ref" => $backend_ref
 315                 ];
 316
 317                 if (DBA::isResult($existing_photo)) {
 318                         $r = DBA::update("photo", $fields, ["id" => $existing_photo["id"]]);
 319                 } else {
 320                         $r = DBA::insert("photo", $fields);
 321                 }
 322
 323                 return $r;
 324         }
 325
 326
 327         /**
 328          * @brief Delete info from table and data from storage
 329          *
 330          * @param array $conditions Field condition(s)
 331          * @param array $options    Options array, Optional
 332          *
 333          * @return boolean
 334          *
 335          * @throws \Exception
 336          * @see   \Friendica\Database\DBA::delete
 337          */
 338         public static function delete(array $conditions, array $options = [])
 339         {
 340                 // get photo to delete data info
 341                 $photos = self::select(["backend-class","backend-ref"], $conditions);
 342
 343                 foreach($photos as $photo) {
 344                         /** @var IStorage $backend_class */
 345                         $backend_class = (string)$photo["backend-class"];
 346                         if ($backend_class !== "") {
 347                                 $backend_class::delete($photo["backend-ref"]);
 348                         }
 349                 }
 350
 351                 return DBA::delete("photo", $conditions, $options);
 352         }
 353
 354         /**
 355          * @brief This function is used by the fromgplus addon
 356          *
 357          * Stores a photo based on image data or an URL
 358          *
 359          * @param integer $uid       user id
 360          * @param string  $imagedata optional, default empty
 361          * @param string  $url       optional, default empty
 362          * @return array
 363          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 364          * @throws \ImagickException
 365          */
 366         public static function storeByData($uid, $imagedata = "", $url = "")
 367         {
 368                 $a = self::getApp();
 369                 $logger = $a->getLogger();
 370                 $profiler = $a->getProfiler();
 371
 372                 $r = DBA::p(
 373                         "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
 374                         WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
 375                         intval($uid)
 376                 );
 377
 378                 if (!DBA::isResult($r)) {
 379                         $logger->info("Can't detect user data.", ['uid' => $uid]);
 380                         return([]);
 381                 }
 382
 383                 $page_owner_nick  = $r[0]['nickname'];
 384
 385                 /// @TODO
 386                 /// $default_cid      = $r[0]['id'];
 387                 /// $community_page   = (($r[0]['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
 388
 389                 if ((strlen($imagedata) == 0) && ($url == "")) {
 390                         $logger->info("No image data and no url provided");
 391                         return([]);
 392                 } elseif (strlen($imagedata) == 0) {
 393                         $logger->info("Uploading picture,", ['url' => $url]);
 394
 395                         $stamp1 = microtime(true);
 396                         $imagedata = @file_get_contents($url);
 397                         $profiler->saveTimestamp($stamp1, "file", System::callstack());
 398                 }
 399
 400                 $maximagesize = Config::get('system', 'maximagesize');
 401
 402                 if (($maximagesize) && (strlen($imagedata) > $maximagesize)) {
 403                         $logger->info("Image exceeds size limit.", ['max' => $maximagesize, 'current' => strlen($imagedata)]);
 404                         return([]);
 405                 }
 406
 407                 $tempfile = tempnam(get_temppath(), "cache");
 408
 409                 $stamp1 = microtime(true);
 410                 file_put_contents($tempfile, $imagedata);
 411                 $profiler->saveTimestamp($stamp1, "file", System::callstack());
 412
 413                 $data = getimagesize($tempfile);
 414
 415                 if (!isset($data["mime"])) {
 416                         unlink($tempfile);
 417                         $logger->info("File is no picture");
 418                         return([]);
 419                 }
 420
 421                 $Image = new Image($imagedata, $data["mime"]);
 422
 423                 if (!$Image->isValid()) {
 424                         unlink($tempfile);
 425                         $logger->info("Picture is no valid picture");
 426                         return([]);
 427                 }
 428
 429                 $Image->orient($tempfile);
 430                 unlink($tempfile);
 431
 432                 $max_length = Config::get('system', 'max_image_length');
 433                 if (! $max_length) {
 434                         $max_length = MAX_IMAGE_LENGTH;
 435                 }
 436
 437                 if ($max_length > 0) {
 438                         $Image->scaleDown($max_length);
 439                 }
 440
 441                 $width = $Image->getWidth();
 442                 $height = $Image->getHeight();
 443
 444                 $hash = Photo::newResource();
 445
 446                 // Pictures are always public by now
 447                 //$defperm = '<'.$default_cid.'>';
 448                 $defperm = "";
 449                 $visitor = 0;
 450
 451                 $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 0, 0, $defperm);
 452
 453                 if (!$r) {
 454                         $logger->info("Picture couldn't be stored");
 455                         return([]);
 456                 }
 457
 458                 $image = ["page" => System::baseUrl().'/photos/'.$page_owner_nick.'/image/'.$hash,
 459                         "full" => $a->getBaseURL()."/photo/{$hash}-0.".$Image->getExt()];
 460
 461                 if ($width > 800 || $height > 800) {
 462                         $image["large"] = System::baseUrl()."/photo/{$hash}-0.".$Image->getExt();
 463                 }
 464
 465                 if ($width > 640 || $height > 640) {
 466                         $Image->scaleDown(640);
 467                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 1, 0, $defperm);
 468                         if ($r) {
 469                                 $image["medium"] = System::baseUrl()."/photo/{$hash}-1.".$Image->getExt();
 470                         }
 471                 }
 472
 473                 if ($width > 320 || $height > 320) {
 474                         $Image->scaleDown(320);
 475                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 2, 0, $defperm);
 476                         if ($r) {
 477                                 $image["small"] = System::baseUrl()."/photo/{$hash}-2.".$Image->getExt();
 478                         }
 479                 }
 480
 481                 if ($width > 160 && $height > 160) {
 482                         $x = 0;
 483                         $y = 0;
 484
 485                         $min = $Image->getWidth();
 486                         if ($min > 160) {
 487                                 $x = ($min - 160) / 2;
 488                         }
 489
 490                         if ($Image->getHeight() < $min) {
 491                                 $min = $Image->getHeight();
 492                                 if ($min > 160) {
 493                                         $y = ($min - 160) / 2;
 494                                 }
 495                         }
 496
 497                         $min = 160;
 498                         $Image->crop(160, $x, $y, $min, $min);
 499
 500                         $r = Photo::store($Image, $uid, $visitor, $hash, $tempfile, L10n::t('Wall Photos'), 3, 0, $defperm);
 501                         if ($r) {
 502                                 $image["thumb"] = $a->getBaseURL() . "/photo/{$hash}-3." . $Image->getExt();
 503                         }
 504                 }
 505
 506                 // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
 507                 $image["preview"] = $image["full"];
 508
 509                 // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
 510                 //if (isset($image["thumb"]))
 511                 //  $image["preview"] = $image["thumb"];
 512
 513                 // Unsure, if this should be activated or deactivated
 514                 //if (isset($image["small"]))
 515                 //  $image["preview"] = $image["small"];
 516
 517                 if (isset($image["medium"])) {
 518                         $image["preview"] = $image["medium"];
 519                 }
 520
 521                 return($image);
 522         }
 523
 524         /**
 525          * @brief Update a photo
 526          *
 527          * @param array         $fields     Contains the fields that are updated
 528          * @param array         $conditions Condition array with the key values
 529          * @param Image         $img        Image to update. Optional, default null.
 530          * @param array|boolean $old_fields Array with the old field values that are about to be replaced (true = update on duplicate)
 531          *
 532          * @return boolean  Was the update successfull?
 533          *
 534          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 535          * @see   \Friendica\Database\DBA::update
 536          */
 537         public static function update($fields, $conditions, Image $img = null, array $old_fields = [])
 538         {
 539                 if (!is_null($img)) {
 540                         // get photo to update
 541                         $photos = self::select(["backend-class","backend-ref"], $conditions);
 542
 543                         foreach($photos as $photo) {
 544                                 /** @var IStorage $backend_class */
 545                                 $backend_class = (string)$photo["backend-class"];
 546                                 if ($backend_class !== "") {
 547                                         $fields["backend-ref"] = $backend_class::put($img->asString(), $photo["backend-ref"]);
 548                                 } else {
 549                                         $fields["data"] = $img->asString();
 550                                 }
 551                         }
 552                         $fields['updated'] = DateTimeFormat::utcNow();
 553                 }
 554
 555                 $fields['edited'] = DateTimeFormat::utcNow();
 556
 557                 return DBA::update("photo", $fields, $conditions, $old_fields);
 558         }
 559
 560         /**
 561          * @param string  $image_url     Remote URL
 562          * @param integer $uid           user id
 563          * @param integer $cid           contact id
 564          * @param boolean $quit_on_error optional, default false
 565          * @return array
 566          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 567          * @throws \ImagickException
 568          */
 569         public static function importProfilePhoto($image_url, $uid, $cid, $quit_on_error = false)
 570         {
 571                 $thumb = "";
 572                 $micro = "";
 573
 574                 $photo = DBA::selectFirst(
 575                         "photo", ["resource-id"], ["uid" => $uid, "contact-id" => $cid, "scale" => 4, "album" => "Contact Photos"]
 576                 );
 577                 if (!empty($photo['resource-id'])) {
 578                         $hash = $photo["resource-id"];
 579                 } else {
 580                         $hash = self::newResource();
 581                 }
 582
 583                 $photo_failure = false;
 584
 585                 $filename = basename($image_url);
 586                 $img_str = Network::fetchUrl($image_url, true);
 587
 588                 if ($quit_on_error && ($img_str == "")) {
 589                         return false;
 590                 }
 591
 592                 $type = Image::guessType($image_url, true);
 593                 $Image = new Image($img_str, $type);
 594                 if ($Image->isValid()) {
 595                         $Image->scaleToSquare(300);
 596
 597                         $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 4);
 598
 599                         if ($r === false) {
 600                                 $photo_failure = true;
 601                         }
 602
 603                         $Image->scaleDown(80);
 604
 605                         $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 5);
 606
 607                         if ($r === false) {
 608                                 $photo_failure = true;
 609                         }
 610
 611                         $Image->scaleDown(48);
 612
 613                         $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 6);
 614
 615                         if ($r === false) {
 616                                 $photo_failure = true;
 617                         }
 618
 619                         $suffix = "?ts=" . time();
 620
 621                         $image_url = System::baseUrl() . "/photo/" . $hash . "-4." . $Image->getExt() . $suffix;
 622                         $thumb = System::baseUrl() . "/photo/" . $hash . "-5." . $Image->getExt() . $suffix;
 623                         $micro = System::baseUrl() . "/photo/" . $hash . "-6." . $Image->getExt() . $suffix;
 624
 625                         // Remove the cached photo
 626                         $a = \get_app();
 627                         $basepath = $a->getBasePath();
 628
 629                         if (is_dir($basepath . "/photo")) {
 630                                 $filename = $basepath . "/photo/" . $hash . "-4." . $Image->getExt();
 631                                 if (file_exists($filename)) {
 632                                         unlink($filename);
 633                                 }
 634                                 $filename = $basepath . "/photo/" . $hash . "-5." . $Image->getExt();
 635                                 if (file_exists($filename)) {
 636                                         unlink($filename);
 637                                 }
 638                                 $filename = $basepath . "/photo/" . $hash . "-6." . $Image->getExt();
 639                                 if (file_exists($filename)) {
 640                                         unlink($filename);
 641                                 }
 642                         }
 643                 } else {
 644                         $photo_failure = true;
 645                 }
 646
 647                 if ($photo_failure && $quit_on_error) {
 648                         return false;
 649                 }
 650
 651                 if ($photo_failure) {
 652                         $image_url = System::baseUrl() . "/images/person-300.jpg";
 653                         $thumb = System::baseUrl() . "/images/person-80.jpg";
 654                         $micro = System::baseUrl() . "/images/person-48.jpg";
 655                 }
 656
 657                 return [$image_url, $thumb, $micro];
 658         }
 659
 660         /**
 661          * @param array $exifCoord coordinate
 662          * @param string $hemi      hemi
 663          * @return float
 664          */
 665         public static function getGps($exifCoord, $hemi)
 666         {
 667                 $degrees = count($exifCoord) > 0 ? self::gps2Num($exifCoord[0]) : 0;
 668                 $minutes = count($exifCoord) > 1 ? self::gps2Num($exifCoord[1]) : 0;
 669                 $seconds = count($exifCoord) > 2 ? self::gps2Num($exifCoord[2]) : 0;
 670
 671                 $flip = ($hemi == "W" || $hemi == "S") ? -1 : 1;
 672
 673                 return floatval($flip * ($degrees + ($minutes / 60) + ($seconds / 3600)));
 674         }
 675
 676         /**
 677          * @param string $coordPart coordPart
 678          * @return float
 679          */
 680         private static function gps2Num($coordPart)
 681         {
 682                 $parts = explode("/", $coordPart);
 683
 684                 if (count($parts) <= 0) {
 685                         return 0;
 686                 }
 687
 688                 if (count($parts) == 1) {
 689                         return $parts[0];
 690                 }
 691
 692                 return floatval($parts[0]) / floatval($parts[1]);
 693         }
 694
 695         /**
 696          * @brief Fetch the photo albums that are available for a viewer
 697          *
 698          * The query in this function is cost intensive, so it is cached.
 699          *
 700          * @param int  $uid    User id of the photos
 701          * @param bool $update Update the cache
 702          *
 703          * @return array Returns array of the photo albums
 704          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 705          */
 706         public static function getAlbums($uid, $update = false)
 707         {
 708                 $sql_extra = Security::getPermissionsSQLByUserId($uid);
 709
 710                 $key = "photo_albums:".$uid.":".local_user().":".remote_user();
 711                 $albums = Cache::get($key);
 712                 if (is_null($albums) || $update) {
 713                         if (!Config::get("system", "no_count", false)) {
 714                                 /// @todo This query needs to be renewed. It is really slow
 715                                 // At this time we just store the data in the cache
 716                                 $albums = q("SELECT COUNT(DISTINCT `resource-id`) AS `total`, `album`, ANY_VALUE(`created`) AS `created`
 717                                         FROM `photo`
 718                                         WHERE `uid` = %d  AND `album` != '%s' AND `album` != '%s' $sql_extra
 719                                         GROUP BY `album` ORDER BY `created` DESC",
 720                                         intval($uid),
 721                                         DBA::escape("Contact Photos"),
 722                                         DBA::escape(L10n::t("Contact Photos"))
 723                                 );
 724                         } else {
 725                                 // This query doesn't do the count and is much faster
 726                                 $albums = q("SELECT DISTINCT(`album`), '' AS `total`
 727                                         FROM `photo` USE INDEX (`uid_album_scale_created`)
 728                                         WHERE `uid` = %d  AND `album` != '%s' AND `album` != '%s' $sql_extra",
 729                                         intval($uid),
 730                                         DBA::escape("Contact Photos"),
 731                                         DBA::escape(L10n::t("Contact Photos"))
 732                                 );
 733                         }
 734                         Cache::set($key, $albums, Cache::DAY);
 735                 }
 736                 return $albums;
 737         }
 738
 739         /**
 740          * @param int $uid User id of the photos
 741          * @return void
 742          * @throws \Exception
 743          */
 744         public static function clearAlbumCache($uid)
 745         {
 746                 $key = "photo_albums:".$uid.":".local_user().":".remote_user();
 747                 Cache::set($key, null, Cache::DAY);
 748         }
 749
 750         /**
 751          * Generate a unique photo ID.
 752          *
 753          * @return string
 754          * @throws \Exception
 755          */
 756         public static function newResource()
 757         {
 758                 return System::createGUID(32, false);
 759         }
 760 }