]> git.mxchange.org Git - friendica.git/blobdiff - src/Model/Photo.php
Issue 9584: Only search posts from federated networks
[friendica.git] / src / Model / Photo.php
index 66b30baef3c54c17e2b09985b5dd1b85bbb0eab2..0f03b54b0dbac9677dfaca7ee2cb48a6211f5e76 100644 (file)
@@ -1,34 +1,51 @@
 <?php
-
 /**
- * @file src/Model/Photo.php
- * @brief This file contains the Photo class for database interface
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
  */
+
 namespace Friendica\Model;
 
-use Friendica\BaseObject;
-use Friendica\Core\Cache;
-use Friendica\Core\Config;
-use Friendica\Core\L10n;
-use Friendica\Core\StorageManager;
+use Friendica\Core\Cache\Duration;
+use Friendica\Core\Logger;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Database\DBStructure;
-use Friendica\Model\Storage\IStorage;
+use Friendica\DI;
+use Friendica\Model\Storage\SystemResource;
 use Friendica\Object\Image;
 use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Network;
-use Friendica\Util\Security;
+use Friendica\Util\Images;
+use Friendica\Security\Security;
+use Friendica\Util\Proxy;
+use Friendica\Util\Strings;
 
 require_once "include/dba.php";
 
 /**
  * Class to handle photo dabatase table
  */
-class Photo extends BaseObject
+class Photo
 {
+       const CONTACT_PHOTOS = 'Contact Photos';
+
        /**
-        * @brief Select rows from the photo table
+        * Select rows from the photo table and returns them as array
         *
         * @param array $fields     Array of selected fields, empty for all
         * @param array $conditions Array of fields for conditions
@@ -37,20 +54,19 @@ class Photo extends BaseObject
         * @return boolean|array
         *
         * @throws \Exception
-        * @see   \Friendica\Database\DBA::select
+        * @see   \Friendica\Database\DBA::selectToArray
         */
-       public static function select(array $fields = [], array $conditions = [], array $params = [])
+       public static function selectToArray(array $fields = [], array $conditions = [], array $params = [])
        {
                if (empty($fields)) {
                        $fields = self::getFields();
                }
 
-               $r = DBA::select("photo", $fields, $conditions, $params);
-               return DBA::toArray($r);
+               return DBA::selectToArray('photo', $fields, $conditions, $params);
        }
 
        /**
-        * @brief Retrieve a single record from the photo table
+        * Retrieve a single record from the photo table
         *
         * @param array $fields     Array of selected fields, empty for all
         * @param array $conditions Array of fields for conditions
@@ -71,7 +87,7 @@ class Photo extends BaseObject
        }
 
        /**
-        * @brief Get photos for user id
+        * Get photos for user id
         *
         * @param integer $uid        User id
         * @param string  $resourceid Rescource ID of the photo
@@ -88,11 +104,11 @@ class Photo extends BaseObject
                $conditions["resource-id"] = $resourceid;
                $conditions["uid"] = $uid;
 
-               return self::select([], $conditions, $params);
+               return self::selectToArray([], $conditions, $params);
        }
 
        /**
-        * @brief Get a photo for user id
+        * Get a photo for user id
         *
         * @param integer $uid        User id
         * @param string  $resourceid Rescource ID of the photo
@@ -115,7 +131,7 @@ class Photo extends BaseObject
        }
 
        /**
-        * @brief Get a single photo given resource id and scale
+        * Get a single photo given resource id and scale
         *
         * This method checks for permissions. Returns associative array
         * on success, "no sign" image info, if user has no permission,
@@ -127,29 +143,28 @@ class Photo extends BaseObject
         * @return boolean|array
         * @throws \Exception
         */
-       public static function getPhoto($resourceid, $scale = 0)
+       public static function getPhoto(string $resourceid, int $scale = 0)
        {
                $r = self::selectFirst(["uid"], ["resource-id" => $resourceid]);
-               if ($r === false) {
+               if (!DBA::isResult($r)) {
                        return false;
                }
 
-               $sql_acl = Security::getPermissionsSQLByUserId($r["uid"]);
+               $uid = $r["uid"];
 
-               $conditions = [
-                       "`resource-id` = ? AND `scale` <= ? " . $sql_acl,
-                       $resourceid, $scale
-               ];
+               $accessible = $uid ? (bool)DI::pConfig()->get($uid, 'system', 'accessible-photos', false) : false;
 
-               $params = ["order" => ["scale" => true]];
+               $sql_acl = Security::getPermissionsSQLByUserId($uid, $accessible);
 
+               $conditions = ["`resource-id` = ? AND `scale` <= ? " . $sql_acl, $resourceid, $scale];
+               $params = ["order" => ["scale" => true]];
                $photo = self::selectFirst([], $conditions, $params);
 
                return $photo;
        }
 
        /**
-        * @brief Check if photo with given conditions exists
+        * Check if photo with given conditions exists
         *
         * @param array $conditions Array of extra conditions
         *
@@ -163,7 +178,7 @@ class Photo extends BaseObject
 
 
        /**
-        * @brief Get Image object for given row id. null if row id does not exist
+        * Get Image object for given row id. null if row id does not exist
         *
         * @param array $photo Photo data. Needs at least 'id', 'type', 'backend-class', 'backend-ref'
         *
@@ -173,44 +188,42 @@ class Photo extends BaseObject
         */
        public static function getImageForPhoto(array $photo)
        {
-               $data = "";
-
-               if ($photo["backend-class"] == "") {
+               $backendClass = DI::storageManager()->getByName($photo['backend-class'] ?? '');
+               if ($backendClass === null) {
                        // legacy data storage in "data" column
-                       $i = self::selectFirst(["data"], ["id" => $photo["id"]]);
+                       $i = self::selectFirst(['data'], ['id' => $photo['id']]);
                        if ($i === false) {
                                return null;
                        }
-                       $data = $i["data"];
+                       $data = $i['data'];
                } else {
-                       $backendClass = $photo["backend-class"];
-                       $backendRef = $photo["backend-ref"];
-                       $data = $backendClass::get($backendRef);
+                       $backendRef = $photo['backend-ref'] ?? '';
+                       $data = $backendClass->get($backendRef);
                }
 
-               if ($data === "") {
+               if (empty($data)) {
                        return null;
                }
 
-               return new Image($data, $photo["type"]);
+               return new Image($data, $photo['type']);
        }
 
        /**
-        * @brief Return a list of fields that are associated with the photo table
+        * Return a list of fields that are associated with the photo table
         *
         * @return array field list
         * @throws \Exception
         */
        private static function getFields()
        {
-               $allfields = DBStructure::definition(self::getApp()->getBasePath(), false);
+               $allfields = DBStructure::definition(DI::app()->getBasePath(), false);
                $fields = array_keys($allfields["photo"]["fields"]);
                array_splice($fields, array_search("data", $fields), 1);
                return $fields;
        }
 
        /**
-        * @brief Construct a photo array for a system resource image
+        * Construct a photo array for a system resource image
         *
         * @param string $filename Image file name relative to code root
         * @param string $mimetype Image mime type. Defaults to "image/jpeg"
@@ -223,18 +236,18 @@ class Photo extends BaseObject
                $fields = self::getFields();
                $values = array_fill(0, count($fields), "");
 
-               $photo = array_combine($fields, $values);
-               $photo["backend-class"] = Storage\SystemResource::class;
-               $photo["backend-ref"] = $filename;
-               $photo["type"] = $mimetype;
-               $photo["cacheable"] = false;
+               $photo                  = array_combine($fields, $values);
+               $photo['backend-class'] = SystemResource::NAME;
+               $photo['backend-ref']   = $filename;
+               $photo['type']          = $mimetype;
+               $photo['cacheable']     = false;
 
                return $photo;
        }
 
 
        /**
-        * @brief store photo metadata in db and binary in default backend
+        * store photo metadata in db and binary in default backend
         *
         * @param Image   $Image     Image object with data
         * @param integer $uid       User ID
@@ -274,21 +287,19 @@ class Photo extends BaseObject
                $data = "";
                $backend_ref = "";
 
-               /** @var IStorage $backend_class */
                if (DBA::isResult($existing_photo)) {
                        $backend_ref = (string)$existing_photo["backend-ref"];
-                       $backend_class = (string)$existing_photo["backend-class"];
+                       $storage = DI::storageManager()->getByName($existing_photo["backend-class"] ?? '');
                } else {
-                       $backend_class = StorageManager::getBackend();
+                       $storage = DI::storage();
                }
 
-               if ($backend_class === "") {
+               if ($storage === null) {
                        $data = $Image->asString();
                } else {
-                       $backend_ref = $backend_class::put($Image->asString(), $backend_ref);
+                       $backend_ref = $storage->put($Image->asString(), $backend_ref);
                }
 
-
                $fields = [
                        "uid" => $uid,
                        "contact-id" => $cid,
@@ -310,7 +321,7 @@ class Photo extends BaseObject
                        "deny_cid" => $deny_cid,
                        "deny_gid" => $deny_gid,
                        "desc" => $desc,
-                       "backend-class" => $backend_class,
+                       "backend-class" => (string)$storage,
                        "backend-ref" => $backend_ref
                ];
 
@@ -325,7 +336,7 @@ class Photo extends BaseObject
 
 
        /**
-        * @brief Delete info from table and data from storage
+        * Delete info from table and data from storage
         *
         * @param array $conditions Field condition(s)
         * @param array $options    Options array, Optional
@@ -338,13 +349,12 @@ class Photo extends BaseObject
        public static function delete(array $conditions, array $options = [])
        {
                // get photo to delete data info
-               $photos = self::select(["backend-class","backend-ref"], $conditions);
+               $photos = self::selectToArray(['backend-class', 'backend-ref'], $conditions);
 
                foreach($photos as $photo) {
-                       /** @var IStorage $backend_class */
-                       $backend_class = (string)$photo["backend-class"];
-                       if ($backend_class !== "") {
-                               $backend_class::delete($photo["backend-ref"]);
+                       $backend_class = DI::storageManager()->getByName($photo['backend-class'] ?? '');
+                       if ($backend_class !== null) {
+                               $backend_class->delete($photo["backend-ref"] ?? '');
                        }
                }
 
@@ -352,179 +362,7 @@ class Photo extends BaseObject
        }
 
        /**
-        * @brief This function is used by the fromgplus addon
-        *
-        * Stores a photo based on image data or an URL
-        *
-        * @param integer $uid       user id
-        * @param string  $imagedata optional, default empty
-        * @param string  $url       optional, default empty
-        * @return array
-        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
-        * @throws \ImagickException
-        */
-       public static function storeByData($uid, $imagedata = "", $url = "")
-       {
-               $a = self::getApp();
-               $logger = $a->getLogger();
-               $profiler = $a->getProfiler();
-
-               $userStmt = DBA::p(
-                       "SELECT `user`.`nickname`, `user`.`page-flags`, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`
-                       WHERE `user`.`uid` = %d AND `user`.`blocked` = 0 AND `contact`.`self` = 1 LIMIT 1",
-                       intval($uid)
-               );
-
-               if (!DBA::isResult($userStmt)) {
-                       $logger->info("Can't detect user data.", ['uid' => $uid]);
-                       return [];
-               } else {
-                       $user = DBA::toArray($userStmt);
-               }
-
-               $page_owner_nick  = $user[0]['nickname'];
-
-               /// @TODO
-               /// $default_cid      = $isStored[0]['id'];
-               /// $community_page   = (($isStored[0]['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
-
-               if ((strlen($imagedata) == 0) && ($url == "")) {
-                       $logger->info("No image data and no url provided");
-                       return [];
-               } elseif (strlen($imagedata) == 0) {
-                       $logger->info("Uploading picture,", ['url' => $url]);
-
-                       $stamp1 = microtime(true);
-                       $imagedata = @file_get_contents($url);
-                       $profiler->saveTimestamp($stamp1, "file", System::callstack());
-               }
-
-               $maxImageSize = Config::get('system', 'maximagesize');
-
-               if (($maxImageSize) && (strlen($imagedata) > $maxImageSize)) {
-                       $logger->info("Image exceeds size limit.", ['max' => $maxImageSize, 'current' => strlen($imagedata)]);
-                       return [];
-               }
-
-               $tempFile = tempnam(get_temppath(), "cache");
-
-               $stamp1 = microtime(true);
-               file_put_contents($tempFile, $imagedata);
-               $profiler->saveTimestamp($stamp1, "file", System::callstack());
-
-               $data = getimagesize($tempFile);
-
-               if (!isset($data["mime"])) {
-                       unlink($tempFile);
-                       $logger->info("File is no picture");
-                       return [];
-               }
-
-               $image = new Image($imagedata, $data["mime"]);
-
-               if (!$image->isValid()) {
-                       unlink($tempFile);
-                       $logger->info("Picture is no valid picture");
-                       return [];
-               }
-
-               $image->orient($tempFile);
-               unlink($tempFile);
-
-               $max_length = Config::get('system', 'max_image_length');
-               if (! $max_length) {
-                       $max_length = MAX_IMAGE_LENGTH;
-               }
-
-               if ($max_length > 0) {
-                       $image->scaleDown($max_length);
-               }
-
-               $width = $image->getWidth();
-               $height = $image->getHeight();
-
-               $hash = self::newResource();
-
-               // Pictures are always public by now
-               //$defperm = '<'.$default_cid.'>';
-               $defperm = "";
-               $visitor = 0;
-
-               $isStored = Photo::store($image, $uid, $visitor, $hash, $tempFile, L10n::t('Wall Photos'), 0, 0, $defperm);
-
-               if (!$isStored) {
-                       $logger->info("Picture couldn't be stored");
-                       return [];
-               }
-
-               $image = ["page" => $a->getBaseURL() . '/photos/' . $page_owner_nick . '/image/' . $hash,
-                       "full" => $a->getBaseURL() . "/photo/{$hash}-0." . $image->getExt()];
-
-               if ($width > 800 || $height > 800) {
-                       $image["large"] = $a->getBaseURL() . "/photo/{$hash}-0." . $image->getExt();
-               }
-
-               if ($width > 640 || $height > 640) {
-                       $image->scaleDown(640);
-                       $isStored = self::store($image, $uid, $visitor, $hash, $tempFile, L10n::t('Wall Photos'), 1, 0, $defperm);
-                       if ($isStored) {
-                               $image["medium"] = $a->getBaseURL() . "/photo/{$hash}-1." . $image->getExt();
-                       }
-               }
-
-               if ($width > 320 || $height > 320) {
-                       $image->scaleDown(320);
-                       $isStored = self::store($image, $uid, $visitor, $hash, $tempFile, L10n::t('Wall Photos'), 2, 0, $defperm);
-                       if ($isStored) {
-                               $image["small"] = $a->getBaseURL() . "/photo/{$hash}-2." . $image->getExt();
-                       }
-               }
-
-               if ($width > 160 && $height > 160) {
-                       $x = 0;
-                       $y = 0;
-
-                       $min = $image->getWidth();
-                       if ($min > 160) {
-                               $x = ($min - 160) / 2;
-                       }
-
-                       if ($image->getHeight() < $min) {
-                               $min = $image->getHeight();
-                               if ($min > 160) {
-                                       $y = ($min - 160) / 2;
-                               }
-                       }
-
-                       $min = 160;
-                       $image->crop(160, $x, $y, $min, $min);
-
-                       $isStored = self::store($image, $uid, $visitor, $hash, $tempFile, L10n::t('Wall Photos'), 3, 0, $defperm);
-                       if ($isStored) {
-                               $image["thumb"] = $a->getBaseURL() . "/photo/{$hash}-3." . $image->getExt();
-                       }
-               }
-
-               // Set the full image as preview image. This will be overwritten, if the picture is larger than 640.
-               $image["preview"] = $image["full"];
-
-               // Deactivated, since that would result in a cropped preview, if the picture wasn't larger than 320
-               //if (isset($image["thumb"]))
-               //  $image["preview"] = $image["thumb"];
-
-               // Unsure, if this should be activated or deactivated
-               //if (isset($image["small"]))
-               //  $image["preview"] = $image["small"];
-
-               if (isset($image["medium"])) {
-                       $image["preview"] = $image["medium"];
-               }
-
-               return $image;
-       }
-
-       /**
-        * @brief Update a photo
+        * Update a photo
         *
         * @param array         $fields     Contains the fields that are updated
         * @param array         $conditions Condition array with the key values
@@ -540,13 +378,12 @@ class Photo extends BaseObject
        {
                if (!is_null($img)) {
                        // get photo to update
-                       $photos = self::select(["backend-class","backend-ref"], $conditions);
+                       $photos = self::selectToArray(['backend-class', 'backend-ref'], $conditions);
 
                        foreach($photos as $photo) {
-                               /** @var IStorage $backend_class */
-                               $backend_class = (string)$photo["backend-class"];
-                               if ($backend_class !== "") {
-                                       $fields["backend-ref"] = $backend_class::put($img->asString(), $photo["backend-ref"]);
+                               $backend_class = DI::storageManager()->getByName($photo['backend-class'] ?? '');
+                               if ($backend_class !== null) {
+                                       $fields["backend-ref"] = $backend_class->put($img->asString(), $photo['backend-ref']);
                                } else {
                                        $fields["data"] = $img->asString();
                                }
@@ -574,29 +411,36 @@ class Photo extends BaseObject
                $micro = "";
 
                $photo = DBA::selectFirst(
-                       "photo", ["resource-id"], ["uid" => $uid, "contact-id" => $cid, "scale" => 4, "album" => "Contact Photos"]
+                       "photo", ["resource-id"], ["uid" => $uid, "contact-id" => $cid, "scale" => 4, "album" => self::CONTACT_PHOTOS]
                );
                if (!empty($photo['resource-id'])) {
-                       $hash = $photo["resource-id"];
+                       $resource_id = $photo["resource-id"];
                } else {
-                       $hash = self::newResource();
+                       $resource_id = self::newResource();
                }
 
                $photo_failure = false;
 
                $filename = basename($image_url);
-               $img_str = Network::fetchUrl($image_url, true);
+               if (!empty($image_url)) {
+                       $ret = DI::httpRequest()->get($image_url);
+                       $img_str = $ret->getBody();
+                       $type = $ret->getContentType();
+               } else {
+                       $img_str = '';
+               }
 
                if ($quit_on_error && ($img_str == "")) {
                        return false;
                }
 
-               $type = Image::guessType($image_url, true);
+               $type = Images::getMimeTypeByData($img_str, $image_url, $type);
+
                $Image = new Image($img_str, $type);
                if ($Image->isValid()) {
                        $Image->scaleToSquare(300);
 
-                       $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 4);
+                       $r = self::store($Image, $uid, $cid, $resource_id, $filename, self::CONTACT_PHOTOS, 4);
 
                        if ($r === false) {
                                $photo_failure = true;
@@ -604,7 +448,7 @@ class Photo extends BaseObject
 
                        $Image->scaleDown(80);
 
-                       $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 5);
+                       $r = self::store($Image, $uid, $cid, $resource_id, $filename, self::CONTACT_PHOTOS, 5);
 
                        if ($r === false) {
                                $photo_failure = true;
@@ -612,7 +456,7 @@ class Photo extends BaseObject
 
                        $Image->scaleDown(48);
 
-                       $r = self::store($Image, $uid, $cid, $hash, $filename, "Contact Photos", 6);
+                       $r = self::store($Image, $uid, $cid, $resource_id, $filename, self::CONTACT_PHOTOS, 6);
 
                        if ($r === false) {
                                $photo_failure = true;
@@ -620,24 +464,24 @@ class Photo extends BaseObject
 
                        $suffix = "?ts=" . time();
 
-                       $image_url = System::baseUrl() . "/photo/" . $hash . "-4." . $Image->getExt() . $suffix;
-                       $thumb = System::baseUrl() . "/photo/" . $hash . "-5." . $Image->getExt() . $suffix;
-                       $micro = System::baseUrl() . "/photo/" . $hash . "-6." . $Image->getExt() . $suffix;
+                       $image_url = DI::baseUrl() . "/photo/" . $resource_id . "-4." . $Image->getExt() . $suffix;
+                       $thumb = DI::baseUrl() . "/photo/" . $resource_id . "-5." . $Image->getExt() . $suffix;
+                       $micro = DI::baseUrl() . "/photo/" . $resource_id . "-6." . $Image->getExt() . $suffix;
 
                        // Remove the cached photo
-                       $a = \get_app();
+                       $a = DI::app();
                        $basepath = $a->getBasePath();
 
                        if (is_dir($basepath . "/photo")) {
-                               $filename = $basepath . "/photo/" . $hash . "-4." . $Image->getExt();
+                               $filename = $basepath . "/photo/" . $resource_id . "-4." . $Image->getExt();
                                if (file_exists($filename)) {
                                        unlink($filename);
                                }
-                               $filename = $basepath . "/photo/" . $hash . "-5." . $Image->getExt();
+                               $filename = $basepath . "/photo/" . $resource_id . "-5." . $Image->getExt();
                                if (file_exists($filename)) {
                                        unlink($filename);
                                }
-                               $filename = $basepath . "/photo/" . $hash . "-6." . $Image->getExt();
+                               $filename = $basepath . "/photo/" . $resource_id . "-6." . $Image->getExt();
                                if (file_exists($filename)) {
                                        unlink($filename);
                                }
@@ -651,9 +495,10 @@ class Photo extends BaseObject
                }
 
                if ($photo_failure) {
-                       $image_url = System::baseUrl() . "/images/person-300.jpg";
-                       $thumb = System::baseUrl() . "/images/person-80.jpg";
-                       $micro = System::baseUrl() . "/images/person-48.jpg";
+                       $contact = Contact::getById($cid) ?: [];
+                       $image_url = Contact::getDefaultAvatar($contact, Proxy::SIZE_SMALL);
+                       $thumb = Contact::getDefaultAvatar($contact, Proxy::SIZE_THUMB);
+                       $micro = Contact::getDefaultAvatar($contact, Proxy::SIZE_MICRO);
                }
 
                return [$image_url, $thumb, $micro];
@@ -695,7 +540,7 @@ class Photo extends BaseObject
        }
 
        /**
-        * @brief Fetch the photo albums that are available for a viewer
+        * Fetch the photo albums that are available for a viewer
         *
         * The query in this function is cost intensive, so it is cached.
         *
@@ -710,9 +555,9 @@ class Photo extends BaseObject
                $sql_extra = Security::getPermissionsSQLByUserId($uid);
 
                $key = "photo_albums:".$uid.":".local_user().":".remote_user();
-               $albums = Cache::get($key);
+               $albums = DI::cache()->get($key);
                if (is_null($albums) || $update) {
-                       if (!Config::get("system", "no_count", false)) {
+                       if (!DI::config()->get("system", "no_count", false)) {
                                /// @todo This query needs to be renewed. It is really slow
                                // At this time we just store the data in the cache
                                $albums = q("SELECT COUNT(DISTINCT `resource-id`) AS `total`, `album`, ANY_VALUE(`created`) AS `created`
@@ -720,8 +565,8 @@ class Photo extends BaseObject
                                        WHERE `uid` = %d  AND `album` != '%s' AND `album` != '%s' $sql_extra
                                        GROUP BY `album` ORDER BY `created` DESC",
                                        intval($uid),
-                                       DBA::escape("Contact Photos"),
-                                       DBA::escape(L10n::t("Contact Photos"))
+                                       DBA::escape(self::CONTACT_PHOTOS),
+                                       DBA::escape(DI::l10n()->t(self::CONTACT_PHOTOS))
                                );
                        } else {
                                // This query doesn't do the count and is much faster
@@ -729,11 +574,11 @@ class Photo extends BaseObject
                                        FROM `photo` USE INDEX (`uid_album_scale_created`)
                                        WHERE `uid` = %d  AND `album` != '%s' AND `album` != '%s' $sql_extra",
                                        intval($uid),
-                                       DBA::escape("Contact Photos"),
-                                       DBA::escape(L10n::t("Contact Photos"))
+                                       DBA::escape(self::CONTACT_PHOTOS),
+                                       DBA::escape(DI::l10n()->t(self::CONTACT_PHOTOS))
                                );
                        }
-                       Cache::set($key, $albums, Cache::DAY);
+                       DI::cache()->set($key, $albums, Duration::DAY);
                }
                return $albums;
        }
@@ -746,7 +591,7 @@ class Photo extends BaseObject
        public static function clearAlbumCache($uid)
        {
                $key = "photo_albums:".$uid.":".local_user().":".remote_user();
-               Cache::set($key, null, Cache::DAY);
+               DI::cache()->set($key, null, Duration::DAY);
        }
 
        /**
@@ -759,4 +604,171 @@ class Photo extends BaseObject
        {
                return System::createGUID(32, false);
        }
+
+       /**
+        * Extracts the rid from a local photo URI
+        *
+        * @param string $image_uri The URI of the photo
+        * @return string The rid of the photo, or an empty string if the URI is not local
+        */
+       public static function ridFromURI(string $image_uri)
+       {
+               if (!stristr($image_uri, DI::baseUrl() . '/photo/')) {
+                       return '';
+               }
+               $image_uri = substr($image_uri, strrpos($image_uri, '/') + 1);
+               $image_uri = substr($image_uri, 0, strpos($image_uri, '-'));
+               if (!strlen($image_uri)) {
+                       return '';
+               }
+               return $image_uri;
+       }
+
+       /**
+        * Changes photo permissions that had been embedded in a post
+        *
+        * @todo This function currently does have some flaws:
+        * - Sharing a post with a forum will create a photo that only the forum can see.
+        * - Sharing a photo again that been shared non public before doesn't alter the permissions.
+        *
+        * @return string
+        * @throws \Exception
+        */
+       public static function setPermissionFromBody($body, $uid, $original_contact_id, $str_contact_allow, $str_group_allow, $str_contact_deny, $str_group_deny)
+       {
+               // Simplify image codes
+               $img_body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
+               $img_body = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $img_body);
+
+               // Search for images
+               if (!preg_match_all("/\[img\](.*?)\[\/img\]/", $img_body, $match)) {
+                       return false;
+               }
+               $images = $match[1];
+               if (empty($images)) {
+                       return false;
+               }
+
+               foreach ($images as $image) {
+                       $image_rid = self::ridFromURI($image);
+                       if (empty($image_rid)) {
+                               continue;
+                       }
+
+                       // Ensure to only modify photos that you own
+                       $srch = '<' . intval($original_contact_id) . '>';
+
+                       $condition = [
+                               'allow_cid' => $srch, 'allow_gid' => '', 'deny_cid' => '', 'deny_gid' => '',
+                               'resource-id' => $image_rid, 'uid' => $uid
+                       ];
+                       if (!Photo::exists($condition)) {
+                               $photo = self::selectFirst(['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'uid'], ['resource-id' => $image_rid]);
+                               if (!DBA::isResult($photo)) {
+                                       Logger::info('Image not found', ['resource-id' => $image_rid]);
+                               } else {
+                                       Logger::info('Mismatching permissions', ['condition' => $condition, 'photo' => $photo]);
+                               }
+                               continue;
+                       }
+
+                       /**
+                        * @todo Existing permissions need to be mixed with the new ones.
+                        * Otherwise this creates problems with sharing the same picture multiple times
+                        * Also check if $str_contact_allow does contain a public forum.
+                        * Then set the permissions to public.
+                        */
+
+                       $fields = ['allow_cid' => $str_contact_allow, 'allow_gid' => $str_group_allow,
+                                       'deny_cid' => $str_contact_deny, 'deny_gid' => $str_group_deny,
+                                       'accessible' => DI::pConfig()->get($uid, 'system', 'accessible-photos', false)];
+
+                       $condition = ['resource-id' => $image_rid, 'uid' => $uid];
+                       Logger::info('Set permissions', ['condition' => $condition, 'permissions' => $fields]);
+                       Photo::update($fields, $condition);
+               }
+
+               return true;
+       }
+
+       /**
+        * Strips known picture extensions from picture links
+        *
+        * @param string $name Picture link
+        * @return string stripped picture link
+        * @throws \Exception
+        */
+       public static function stripExtension($name)
+       {
+               $name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
+               foreach (Images::supportedTypes() as $m => $e) {
+                       $name = str_replace("." . $e, "", $name);
+               }
+               return $name;
+       }
+
+       /**
+        * Returns the GUID from picture links
+        *
+        * @param string $name Picture link
+        * @return string GUID
+        * @throws \Exception
+        */
+       public static function getGUID($name)
+       {
+               $base = DI::baseUrl()->get();
+
+               $guid = str_replace([Strings::normaliseLink($base), '/photo/'], '', Strings::normaliseLink($name));
+
+               $guid = self::stripExtension($guid);
+               if (substr($guid, -2, 1) != "-") {
+                       return '';
+               }
+
+               $scale = intval(substr($guid, -1, 1));
+               if (!is_numeric($scale)) {
+                       return '';
+               }
+
+               $guid = substr($guid, 0, -2);
+               return $guid;
+       }
+
+       /**
+        * Tests if the picture link points to a locally stored picture
+        *
+        * @param string $name Picture link
+        * @return boolean
+        * @throws \Exception
+        */
+       public static function isLocal($name)
+       {
+               $guid = self::getGUID($name);
+
+               if (empty($guid)) {
+                       return false;
+               }
+
+               return DBA::exists('photo', ['resource-id' => $guid]);
+       }
+
+       /**
+        * Tests if the link points to a locally stored picture page
+        *
+        * @param string $name Page link
+        * @return boolean
+        * @throws \Exception
+        */
+       public static function isLocalPage($name)
+       {
+               $base = DI::baseUrl()->get();
+
+               $guid = str_replace(Strings::normaliseLink($base), '', Strings::normaliseLink($name));
+               $guid = preg_replace("=/photos/.*/image/(.*)=ism", '$1', $guid);
+               if (empty($guid)) {
+                       return false;
+               }
+
+               return DBA::exists('photo', ['resource-id' => $guid]);
+       }
 }