code:
<?php
/*
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2008, 2009, StatusNet, Inc.
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }

/**
 * Common superclass for all IM sending queue handlers.
 */

class ImSenderQueueHandler extends QueueHandler
{
    function __construct($plugin)
    {
        $this->plugin = $plugin;
    }

    /**
     * Handle outgoing IM data to be sent from the bot to a user
     * @param object $data
     * @return boolean success
     */
    function handle($data) : bool
    {
        return $this->plugin->imManager->send_raw_message($data);
    }
}


code:
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * widget for displaying a list of notice attachments
 *
 * PHP version 5
 *
 * LICENCE: 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 <http://www.gnu.org/licenses/>.
 *
 * @category  UI
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @author    Sarven Capadisli <csarven@status.net>
 * @copyright 2008 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('GNUSOCIAL')) {
    exit(1);
}

/**
 * used for one-off attachment action
 */
class Attachment extends AttachmentListItem
{
    public function showNoticeAttachment()
    {
        if (Event::handle('StartShowAttachmentLink', [$this->out, $this->attachment])) {
            $this->out->elementStart('div', ['id' => 'attachment_view',
                                                  'class' => 'h-entry']);
            $this->out->elementStart('div', 'entry-title');
            $this->out->element('a', $this->linkAttr(), _m('Download link'));
            $this->out->elementEnd('div');

            $this->out->elementStart('article', 'e-content');
            $this->showRepresentation();
            $this->out->elementEnd('article');
            Event::handle('EndShowAttachmentLink', [$this->out, $this->attachment]);
            $this->out->elementEnd('div');
        }
    }

    public function show()
    {
        $this->showNoticeAttachment();
    }

    public function linkAttr()
    {
        return ['rel' => 'external', 'href' => $this->attachment->getUrl(null)];
    }
}

repo_name: ksuudilla/gnu

license: mit


code:
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * widget for displaying a list of notice attachments
 *
 * PHP version 5
 *
 * LICENCE: 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 <http://www.gnu.org/licenses/>.
 *
 * @category  UI
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @author    Sarven Capadisli <csarven@status.net>
 * @copyright 2008 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('GNUSOCIAL')) { exit(1); }

/**
 * widget for displaying a list of notice attachments
 *
 * There are a number of actions that display a list of notices, in
 * reverse chronological order. This widget abstracts out most of the
 * code for UI for notice lists. It's overridden to hide some
 * data for e.g. the profile page.
 *
 * @category UI
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link     http://status.net/
 * @see      Notice
 * @see      NoticeListItem
 * @see      ProfileNoticeList
 */
class AttachmentList extends Widget
{
    /** the current stream of notices being displayed. */

    var $notice = null;

    /**
     * constructor
     *
     * @param Notice $notice stream of notices from DB_DataObject
     */
    function __construct(Notice $notice, $out=null)
    {
        parent::__construct($out);
        $this->notice = $notice;
    }

    /**
     * show the list of attachments
     *
     * "Uses up" the stream by looping through it. So, probably can't
     * be called twice on the same list.
     *
     * @return int count of items listed.
     */
    function show()
    {
    	$attachments = $this->notice->attachments();
        if (!count($attachments)) {
            return 0;
        }

        if ($this->notice->getProfile()->isSilenced()) {
            // TRANS: Message for inline attachments list in notices when the author has been silenced.
            $this->element('div', ['class'=>'error'],
                           _('Attachments are hidden because this profile has been silenced.'));
            return 0;
        }

        $this->showListStart();

        foreach ($attachments as $att) {
            $item = $this->newListItem($att);
            $item->show();
        }

        $this->showListEnd();

        return count($attachments);
    }

    function showListStart()
    {
        $this->out->elementStart('ol', array('class' => 'attachments'));
    }

    function showListEnd()
    {
        $this->out->elementEnd('ol');
    }

    /**
     * returns a new list item for the current attachment
     *
     * @param File $attachment the current attachment
     *
     * @return AttachmentListItem a list item for displaying the attachment
     */
    function newListItem(File $attachment)
    {
        return new AttachmentListItem($attachment, $this->out);
    }
}


code:
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * widget for displaying a list of notice attachments
 *
 * PHP version 5
 *
 * LICENCE: 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 <http://www.gnu.org/licenses/>.
 *
 * @category  UI
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @author    Sarven Capadisli <csarven@status.net>
 * @copyright 2008 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('GNUSOCIAL')) { exit(1); }

/**
 * widget for displaying a single notice
 *
 * This widget has the core smarts for showing a single notice: what to display,
 * where, and under which circumstances. Its key method is show(); this is a recipe
 * that calls all the other show*() methods to build up a single notice. The
 * ProfileNoticeListItem subclass, for example, overrides showAuthor() to skip
 * author info (since that's implicit by the data in the page).
 *
 * @category UI
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link     http://status.net/
 * @see      NoticeList
 * @see      ProfileNoticeListItem
 */
class AttachmentListItem extends Widget
{
    /** The attachment this item will show. */

    var $attachment = null;

    /**
     * @param File $attachment the attachment we will display
     */
    function __construct(File $attachment, $out=null)
    {
        parent::__construct($out);
        $this->attachment  = $attachment;
    }

    function title() {
        return $this->attachment->getTitle() ?: MediaFile::getDisplayName($this->attachment);
    }

    function linkTitle() {
        return $this->title();
    }

    /**
     * recipe function for displaying a single notice.
     *
     * This uses all the other methods to correctly display a notice. Override
     * it or one of the others to fine-tune the output.
     *
     * @return void
     */
    function show()
    {
        $this->showStart();
        try {
            $this->showNoticeAttachment();
        } catch (Exception $e) {
            $this->element('div', ['class'=>'error'], $e->getMessage());
            common_debug($e->getMessage());
        }
        $this->showEnd();
    }

    function linkAttr() {
        return [
            'class' => 'u-url',
            'href'  => $this->attachment->getAttachmentDownloadUrl(),
            'title' => $this->linkTitle()
        ];
    }

    function showNoticeAttachment()
    {
        $this->showRepresentation();
    }

    function showRepresentation() {
        $enclosure = $this->attachment->getEnclosure();

        if (Event::handle('StartShowAttachmentRepresentation', [$this->out, $this->attachment])) {

            $this->out->elementStart('label');
            $this->out->element('a', ['rel' => 'external', 'href' => $this->attachment->getAttachmentUrl()], $this->title());
            $this->out->elementEnd('label');

            $this->out->element('br');

            try {
                if (!empty($enclosure->mimetype)) {
                    // First, prepare a thumbnail if it exists.
                    $thumb = null;
                    try {
                        // Tell getThumbnail that we can show an animated image if it has one (4th arg, "force_still")
                        $thumb = File_thumbnail::fromFileObject($this->attachment, null, null, false, false);
                    } catch (UseFileAsThumbnailException $e) {
                        $thumb = null;
                    } catch (UnsupportedMediaException $e) {
                        // FIXME: Show a good representation of unsupported/unshowable images
                        $thumb = null;
                    } catch (FileNotFoundException $e) {
                        // Remote file
                        $thumb = null;
                    }

                    // Then get the kind of mediatype we're dealing with
                    $mediatype = common_get_mime_media($enclosure->mimetype);

                    // FIXME: Get proper mime recognition of Ogg files! If system has 'mediainfo', this should do it:
                    // $ mediainfo --inform='General;%InternetMediaType%'
                    if ($this->attachment->mimetype === 'application/ogg') {
                        $mediatype = 'video';   // because this element can handle Ogg/Vorbis etc. on its own
                    }

                    // Ugly hack to show text/html links which have a thumbnail (such as from oEmbed/OpenGraph image URLs)
                    if (!in_array($mediatype, ['image', 'audio', 'video']) && $thumb instanceof File_thumbnail) {
                        $mediatype = 'image';
                    }

                    switch ($mediatype) {
                        // Anything we understand as an image, if we need special treatment, do it in StartShowAttachmentRepresentation
                        case 'image':
                            if ($thumb instanceof File_thumbnail) {
                                $this->out->element('img', $thumb->getHtmlAttrs(['class' => 'u-photo', 'alt' => '']));
                            } else {
                                try {
                                    // getUrl(true) because we don't want to hotlink, could be made configurable
                                    $this->out->element('img', ['class' => 'u-photo',
                                        'src' => $this->attachment->getUrl(true),
                                        'alt' => $this->attachment->getTitle()]);
                                } catch (FileNotStoredLocallyException $e) {
                                    $url = $e->file->getUrl(false);
                                    $this->out->element('a', ['href' => $url, 'rel' => 'external'], $url);
                                }
                            }
                            unset($thumb);  // there's no need carrying this along after this
                            break;

                        // HTML5 media elements
                        case 'audio':
                        case 'video':
                            if ($thumb instanceof File_thumbnail) {
                                $poster = $thumb->getUrl();
                                unset($thumb);  // there's no need carrying this along after this
                            } else {
                                $poster = null;
                            }

                            $this->out->elementStart($mediatype,
                                array('class' => "attachment_player u-{$mediatype}",
                                    'poster' => $poster,
                                    'controls' => 'controls'));
                            $this->out->element('source',
                                array('src' => $this->attachment->getUrl(),
                                    'type' => $this->attachment->mimetype));
                            $this->out->elementEnd($mediatype);
                            break;

                        default:
                            unset($thumb);  // there's no need carrying this along
                            switch (common_bare_mime($this->attachment->mimetype)) {
                                case 'text/plain':
                                    $this->element('div', ['class' => 'e-content plaintext'],
                                        file_get_contents($this->attachment->getPath()));
                                    break;
                                case 'text/html':
                                    if (!empty($this->attachment->filename)
                                        && (GNUsocial::isAjax() || common_config('attachments', 'show_html'))) {
                                        // Locally-uploaded HTML. Scrub and display inline.
                                        $this->showHtmlFile($this->attachment);
                                        break;
                                    }
                                // Fall through to default if it wasn't a _local_ text/html File object
                                default:
                                    Event::handle('ShowUnsupportedAttachmentRepresentation', array($this->out, $this->attachment));
                            }
                    }
                } else {
                    Event::handle('ShowUnsupportedAttachmentRepresentation', array($this->out, $this->attachment));
                }
            } catch (FileNotFoundException $e) {
                if (!$this->attachment->isLocal()) {
                    throw $e;
                }
            }
        }
        Event::handle('EndShowAttachmentRepresentation', array($this->out, $this->attachment));
    }

    protected function showHtmlFile(File $attachment)
    {
        $body = $this->scrubHtmlFile($attachment);
        if ($body) {
            $this->out->raw($body);
        }
    }

    /**
     * @return mixed false on failure, HTML fragment string on success
     */
    protected function scrubHtmlFile(File $attachment)
    {
        $path = $attachment->getPath();
        $raw = file_get_contents($path);

        // Normalize...
        $dom = new DOMDocument();
        if(!$dom->loadHTML($raw)) {
            common_log(LOG_ERR, "Bad HTML in local HTML attachment $path");
            return false;
        }

        // Remove <script>s or htmlawed will dump their contents into output!
        // Note: removing child nodes while iterating seems to mess things up,
        // hence the double loop.
        $scripts = array();
        foreach ($dom->getElementsByTagName('script') as $script) {
            $scripts[] = $script;
        }
        foreach ($scripts as $script) {
            common_log(LOG_DEBUG, $script->textContent);
            $script->parentNode->removeChild($script);
        }

        // Trim out everything outside the body...
        $body = $dom->saveHTML();
        $body = preg_replace('/^.*<body[^>]*>/is', '', $body);
        $body = preg_replace('/<\/body[^>]*>.*$/is', '', $body);

        require_once INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php';
        $purifier = new HTMLPurifier();
        return $purifier->purify($body);
    }

    /**
     * start a single notice.
     *
     * @return void
     */
    function showStart()
    {
        // XXX: RDFa
        // TODO: add notice_type class e.g., notice_video, notice_image
        $this->out->elementStart('li');
    }

    /**
     * finish the notice
     *
     * Close the last elements in the notice list item
     *
     * @return void
     */
    function showEnd()
    {
        $this->out->elementEnd('li');
    }
}


code:
<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.

/**
 * FIXME
 *
 * @category  Widget
 * @package   GNUsocial
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2009 StatusNet, Inc.
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */

defined('GNUSOCIAL') || die();

/**
 * FIXME
 *
 * These are the widgets that show interesting data about a person * group, or site.
 *
 * @category  Widget
 * @package   GNUsocial
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2009 StatusNet, Inc.
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */
class AttachmentNoticeSection extends NoticeSection
{
    public function showContent()
    {
        parent::showContent();
        return false;
    }

    public function getNotices()
    {
        $notice = new Notice;

        $notice->joinAdd(array('id', 'file_to_post:post_id'));
        $notice->whereAdd(sprintf('file_to_post.file_id = %d', $this->out->attachment->id));

        $notice->selectAdd('notice.id');
        $notice->orderBy('notice.created DESC, notice.id DESC');
        $notice->find();
        return $notice;
    }

    public function title()
    {
        // TRANS: Title.
        return _('Notices where this attachment appears');
    }

    public function divId()
    {
        return 'attachment_section';
    }
}


code:
<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Abstraction for an image file
 *
 * @category  Image
 * @package   GNUsocial
 *
 * @author    Evan Prodromou <evan@status.net>
 * @author    Zach Copley <zach@status.net>
 * @author    Mikael Nordfeldth <mmn@hethane.se>
 * @author    Miguel Dantas <biodantasgs@gmail.com>
 * @author    Diogo Cordeiro <diogo@fc.up.pt>
 * @copyright 2008, 2019-2020 Free Software Foundation http://fsf.org
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 */
defined('GNUSOCIAL') || die();

use Intervention\Image\ImageManagerStatic as Image;

/**
 * A wrapper on uploaded images
 *
 * Makes it slightly easier to accept an image file from upload.
 *
 * @category Image
 * @package  GNUsocial
 *
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @author   Evan Prodromou <evan@status.net>
 * @author   Zach Copley <zach@status.net>
 *
 * @see      https://www.gnu.org/software/social/
 */
class ImageFile extends MediaFile
{
    public $type;
    public $height;
    public $width;
    public $rotate = 0;    // degrees to rotate for properly oriented image (extrapolated from EXIF etc.)
    public $animated; // Animated image? (has more than 1 frame). null means untested
    public $mimetype; // The _ImageFile_ mimetype, _not_ the originating File object

    /**
     * ImageFile constructor.
     *
     * @param int|null $id The DB id of the file. Int if known, null if not.
     *                     If null, it searches for it. If -1, it skips all DB
     *                     interactions (useful for temporary objects)
     * @param string $filepath The path of the file this media refers to. Required
     * @param string|null $filehash The hash of the file, if known. Optional
     * @param string|null $fileurl
     * @throws ClientException
     * @throws NoResultException
     * @throws ServerException
     * @throws UnsupportedMediaException
     */
    public function __construct(?int $id = null, string $filepath, ?string $filehash = null, ?string $fileurl = null)
    {
        $old_limit = ini_set('memory_limit', common_config('attachments', 'memory_limit'));

        // These do not have to be the same as fileRecord->filename for example,
        // since we may have generated an image source file from something else!
        $this->filepath = $filepath;
        $this->filename = basename($filepath);

        $img = Image::make($this->filepath);
        $this->mimetype = $img->mime();

        $cmp = function ($obj, $type) {
            if ($obj->mimetype == image_type_to_mime_type($type)) {
                $obj->type = $type;
                return true;
            }
            return false;
        };
        if (!(($cmp($this, IMAGETYPE_GIF)  && function_exists('imagecreatefromgif'))  ||
              ($cmp($this, IMAGETYPE_JPEG) && function_exists('imagecreatefromjpeg')) ||
              ($cmp($this, IMAGETYPE_BMP)  && function_exists('imagecreatefrombmp'))  ||
              ($cmp($this, IMAGETYPE_WBMP) && function_exists('imagecreatefromwbmp')) ||
              ($cmp($this, IMAGETYPE_XBM)  && function_exists('imagecreatefromxbm'))  ||
              ($cmp($this, IMAGETYPE_PNG)  && function_exists('imagecreatefrompng'))  ||
              ($cmp($this, IMAGETYPE_WEBP) && function_exists('imagecreatefromwebp'))
             )
        ) {
            common_debug("Mimetype '{$this->mimetype}' was not recognized as a supported format");
            // TRANS: Exception thrown when trying to upload an unsupported image file format.
            throw new UnsupportedMediaException(_m('Unsupported image format.'), $this->filepath);
        }

        $this->width = $img->width();
        $this->height = $img->height();

        parent::__construct(
            $filepath,
            $this->mimetype,
            $filehash,
            $id,
            $fileurl
        );

        if ($this->type === IMAGETYPE_JPEG) {
            // Orientation value to rotate thumbnails properly
            $exif = @$img->exif();
            if (is_array($exif) && isset($exif['Orientation'])) {
                switch ((int)($exif['Orientation'])) {
                    case 1: // top is top
                        $this->rotate = 0;
                        break;
                    case 3: // top is bottom
                        $this->rotate = 180;
                        break;
                    case 6: // top is right
                        $this->rotate = -90;
                        break;
                    case 8: // top is left
                        $this->rotate = 90;
                        break;
                }
                // If we ever write this back, Orientation should be set to '1'
            }
        } elseif ($this->type === IMAGETYPE_GIF) {
            $this->animated = $this->isAnimatedGif();
        }

        Event::handle('FillImageFileMetadata', [$this]);

        $img->destroy();
        ini_set('memory_limit', $old_limit); // Restore the old memory limit
    }

    /**
     * Shortcut method to get an ImageFile from a File
     *
     * @param File $file
     * @return ImageFile
     * @throws ClientException
     * @throws FileNotFoundException
     * @throws NoResultException
     * @throws ServerException
     * @throws UnsupportedMediaException
     */
    public static function fromFileObject(File $file)
    {
        $media = common_get_mime_media($file->mimetype);

        // And we'll only consider it an image if it has such a media type
        if ($media !== 'image') {
            throw new UnsupportedMediaException(_m('Unsupported media format.'), $file->getPath());
        }

        $filepath = $file->getPath();

        return new self($file->getID(), $filepath, $file->filehash);
    }

    public function getPath()
    {
        if (!file_exists($this->filepath)) {
            throw new FileNotFoundException($this->filepath);
        }

        return $this->filepath;
    }

    /**
     * Process a file upload
     *
     * Uses MediaFile's `fromUpload` to do the majority of the work
     * and ensures the uploaded file is in fact an image.
     *
     * @param string $param
     * @param null|Profile $scoped
     *
     * @return ImageFile
     * @throws NoResultException
     * @throws NoUploadedMediaException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     *
     * @throws ClientException
     */
    public static function fromUpload(string $param = 'upload', ?Profile $scoped = null): self
    {
        $mediafile = parent::fromUpload($param, $scoped);
        if ($mediafile instanceof self) {
            return $mediafile;
        } else {
            // We can conclude that we have failed to get the MIME type
            // TRANS: Client exception thrown trying to upload an invalid image type.
            // TRANS: %s is the file type that was denied
            $hint = sprintf(_m('"%s" is not a supported file type on this server. ' .
                'Try using another image format.'), $mediafile->mimetype);
            throw new ClientException($hint);
        }
    }

    /**
     * Create a new ImageFile object from an url
     *
     * Uses MediaFile's `fromUrl` to do the majority of the work
     * and ensures the uploaded file is in fact an image.
     *
     * @param string $url Remote image URL
     * @param Profile|null $scoped
     * @param string|null $name
     * @return ImageFile
     * @throws ClientException
     * @throws FileNotFoundException
     * @throws InvalidFilenameException
     * @throws NoResultException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     */
    public static function fromUrl(string $url, ?Profile $scoped = null, ?string $name = null): self
    {
        $mediafile = parent::fromUrl($url, $scoped, $name);
        if ($mediafile instanceof self) {
            return $mediafile;
        } else {
            // We can conclude that we have failed to get the MIME type
            // TRANS: Client exception thrown trying to upload an invalid image type.
            // TRANS: %s is the file type that was denied
            $hint = sprintf(_m('"%s" is not a supported file type on this server. ' .
                'Try using another image format.'), $mediafile->mimetype);
            throw new ClientException($hint);
        }
    }

    /**
     * Several obscure file types should be normalized to WebP on resize.
     *
     * Keeps only GIF (if animated) and WebP formats
     *
     * @return int
     */
    public function preferredType()
    {
        if ($this->type == IMAGETYPE_GIF && $this->animated) {
            return $this->type;
        }

        return IMAGETYPE_WEBP;
    }

    /**
     * Copy the image file to the given destination.
     *
     * This function may modify the resulting file. Please use the
     * returned ImageFile object to read metadata (width, height etc.)
     *
     * @param string $outpath
     *
     * @return ImageFile the image stored at target path
     * @throws NoResultException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     *
     * @throws ClientException
     */
    public function copyTo($outpath)
    {
        return new self(null, $this->resizeTo($outpath));
    }

    /**
     * Create and save a thumbnail image.
     *
     * @param string $outpath
     * @param array $box width, height, boundary box (x,y,w,h) defaults to full image
     *
     * @return string full local filesystem filename
     * @return string full local filesystem filename
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     *
     */
    public function resizeTo($outpath, array $box = [])
    {
        $box['width'] = isset($box['width']) ? (int)($box['width']) : $this->width;
        $box['height'] = isset($box['height']) ? (int)($box['height']) : $this->height;
        $box['x'] = isset($box['x']) ? (int)($box['x']) : 0;
        $box['y'] = isset($box['y']) ? (int)($box['y']) : 0;
        $box['w'] = isset($box['w']) ? (int)($box['w']) : $this->width;
        $box['h'] = isset($box['h']) ? (int)($box['h']) : $this->height;

        if (!file_exists($this->filepath)) {
            // TRANS: Exception thrown during resize when image has been registered as present,
            // but is no longer there.
            throw new FileNotFoundException($this->filepath);
        }

        // Don't rotate/crop/scale if it isn't necessary
        if ($box['width'] === $this->width
            && $box['height'] === $this->height
            && $box['x'] === 0
            && $box['y'] === 0
            && $box['w'] === $this->width
            && $box['h'] === $this->height
            && $this->type === $this->preferredType()) {
            if (abs($this->rotate) == 90) {
                // Box is rotated 90 degrees in either direction,
                // so we have to redefine x to y and vice versa.
                $tmp = $box['width'];
                $box['width'] = $box['height'];
                $box['height'] = $tmp;
                $tmp = $box['x'];
                $box['x'] = $box['y'];
                $box['y'] = $tmp;
                $tmp = $box['w'];
                $box['w'] = $box['h'];
                $box['h'] = $tmp;
            }
        }

        $this->height = $box['h'];
        $this->width = $box['w'];

        if (Event::handle('StartResizeImageFile', [$this, $outpath, $box])) {
            $outpath = $this->resizeToFile($outpath, $box);
        }

        if (!file_exists($outpath)) {
            if ($this->fileRecord instanceof File) {
                throw new UseFileAsThumbnailException($this->fileRecord);
            } else {
                throw new UnsupportedMediaException('No local File object exists for ImageFile.');
            }
        }

        return $outpath;
    }

    /**
     * Resizes a file. If $box is omitted, the size is not changed, but this is still useful,
     * because it will reencode the image in the `self::prefferedType()` format. This only
     * applies henceforward, not retroactively
     *
     * Increases the 'memory_limit' to the one in the 'attachments' section in the config, to
     * enable the handling of bigger images, which can cause a peak of memory consumption, while
     * encoding
     *
     * @param $outpath
     * @param array $box
     *
     * @throws Exception
     */
    protected function resizeToFile(string $outpath, array $box): string
    {
        $old_limit = ini_set('memory_limit', common_config('attachments', 'memory_limit'));

        try {
            $img = Image::make($this->filepath);
        } catch (Exception $e) {
            common_log(LOG_ERR, __METHOD__ . ' encountered exception: ' . print_r($e, true));
            // TRANS: Exception thrown when trying to resize an unknown file type.
            throw new Exception(_m('Unknown file type'));
        }

        if ($this->filepath === $outpath) {
            @unlink($outpath);
        }

        if ($this->rotate != 0) {
            $img = $img->orientate();
        }

        $img->fit(
            $box['width'],
            $box['height'],
            function ($constraint) {
                if (common_config('attachments', 'upscale') !== true) {
                    $constraint->upsize(); // Prevent upscaling
                }
            }
        );

        // Ensure we save in the correct format and allow customization based on type
        $type = $this->preferredType();
        switch ($type) {
            case IMAGETYPE_WEBP:
                $img->save($outpath, 100, 'webp');
                break;
            case IMAGETYPE_GIF:
                $img->save($outpath, 100, 'gif');
                break;
            default:
                // TRANS: Exception thrown when trying resize an unknown file type.
                throw new Exception(_m('Unknown file type'));
        }

        $img->destroy();

        ini_set('memory_limit', $old_limit); // Restore the old memory limit

        return $outpath;
    }

    public function scaleToFit($maxWidth = null, $maxHeight = null, $crop = null)
    {
        return self::getScalingValues(
            $this->width,
            $this->height,
            $maxWidth,
            $maxHeight,
            $crop,
            $this->rotate
        );
    }

    /**
     * Gets scaling values for images of various types. Cropping can be enabled.
     *
     * Values will scale _up_ to fit max values if cropping is enabled!
     * With cropping disabled, the max value of each axis will be respected.
     *
     * @param $width    int Original width
     * @param $height   int Original height
     * @param $maxW     int Resulting max width
     * @param $maxH     int Resulting max height
     * @param $crop     int Crop to the size (not preserving aspect ratio)
     * @param int $rotate
     *
     * @return array
     * @throws ServerException
     *
     */
    public static function getScalingValues(
        $width,
        $height,
        $maxW = null,
        $maxH = null,
        $crop = null,
        $rotate = 0
    ) {
        $maxW = $maxW ?: common_config('thumbnail', 'width');
        $maxH = $maxH ?: common_config('thumbnail', 'height');

        if ($maxW < 1 || ($maxH !== null && $maxH < 1)) {
            throw new ServerException('Bad parameters for ImageFile::getScalingValues');
        }
        if ($maxH === null) {
            // if maxH is null, we set maxH to equal maxW and enable crop
            $maxH = $maxW;
            $crop = true;
        }

        // Because GD doesn't understand EXIF orientation etc.
        if (abs($rotate) == 90) {
            $tmp = $width;
            $width = $height;
            $height = $tmp;
        }

        // Cropping data (for original image size). Default values, 0 and null,
        // imply no cropping and with preserved aspect ratio (per axis).
        $cx = 0;    // crop x
        $cy = 0;    // crop y
        $cw = null; // crop area width
        $ch = null; // crop area height

        if ($crop) {
            $s_ar = $width / $height;
            $t_ar = $maxW / $maxH;

            $rw = $maxW;
            $rh = $maxH;

            // Source aspect ratio differs from target, recalculate crop points!
            if ($s_ar > $t_ar) {
                $cx = floor($width / 2 - $height * $t_ar / 2);
                $cw = ceil($height * $t_ar);
            } elseif ($s_ar < $t_ar) {
                $cy = floor($height / 2 - $width / $t_ar / 2);
                $ch = ceil($width / $t_ar);
            }
        } else {
            $rw = $maxW;
            $rh = ceil($height * $rw / $width);

            // Scaling caused too large height, decrease to max accepted value
            if ($rh > $maxH) {
                $rh = $maxH;
                $rw = ceil($width * $rh / $height);
            }
        }
        return [(int)$rw, (int)$rh,
            (int)$cx, (int)$cy,
            is_null($cw) ? $width : (int)$cw,
            is_null($ch) ? $height : (int)$ch,];
    }

    /**
     * Animated GIF test, courtesy of frank at huddler dot com et al:
     * http://php.net/manual/en/function.imagecreatefromgif.php#104473
     * Modified so avoid landing inside of a header (and thus not matching our regexp).
     */
    protected function isAnimatedGif()
    {
        if (!($fh = @fopen($this->filepath, 'rb'))) {
            return false;
        }

        $count = 0;
        //an animated gif contains multiple "frames", with each frame having a
        //header made up of:
        // * a static 4-byte sequence (\x00\x21\xF9\x04)
        // * 4 variable bytes
        // * a static 2-byte sequence (\x00\x2C)
        // In total the header is maximum 10 bytes.

        // We read through the file til we reach the end of the file, or we've found
        // at least 2 frame headers
        while (!feof($fh) && $count < 2) {
            $chunk = fread($fh, 1024 * 100); //read 100kb at a time
            $count += preg_match_all('#\x00\x21\xF9\x04.{4}\x00\x2C#s', $chunk, $matches);
            // rewind in case we ended up in the middle of the header, but avoid
            // infinite loop (i.e. don't rewind if we're already in the end).
            if (!feof($fh) && ftell($fh) >= 9) {
                fseek($fh, -9, SEEK_CUR);
            }
        }

        fclose($fh);
        return $count >= 1; // number of animated frames apart from the original image
    }

    /**
     * @param $width
     * @param $height
     * @param $crop
     * @param false $upscale
     * @return File_thumbnail
     * @throws ClientException
     * @throws FileNotFoundException
     * @throws FileNotStoredLocallyException
     * @throws InvalidFilenameException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     */
    public function getFileThumbnail($width = null, $height = null, $crop = null, $upscale = false)
    {
        if (!$this->fileRecord instanceof File) {
            throw new ServerException('No File object attached to this ImageFile object.');
        }

        // Throws FileNotFoundException or FileNotStoredLocallyException
        $this->filepath = $this->fileRecord->getFileOrThumbnailPath();
        $filename = basename($this->filepath);

        if ($width === null) {
            $width = common_config('thumbnail', 'width');
            $height = common_config('thumbnail', 'height');
            $crop = common_config('thumbnail', 'crop');
        }

        if (!$upscale) {
            if ($width > $this->width) {
                $width = $this->width;
            }
            if (!is_null($height) && $height > $this->height) {
                $height = $this->height;
            }
        }

        if ($height === null) {
            $height = $width;
            $crop = true;
        }

        // Get proper aspect ratio width and height before lookup
        // We have to do it through an ImageFile object because of orientation etc.
        // Only other solution would've been to rotate + rewrite uploaded files
        // which we don't want to do because we like original, untouched data!
        list($width, $height, $x, $y, $w, $h) = $this->scaleToFit($width, $height, $crop);

        $thumb = File_thumbnail::pkeyGet([
            'file_id' => $this->fileRecord->getID(),
            'width' => $width,
            'height' => $height,
        ]);

        if ($thumb instanceof File_thumbnail) {
            $this->height = $height;
            $this->width = $width;
            return $thumb;
        }

        $type = $this->preferredType();
        $ext = image_type_to_extension($type, true);
        // Decoding returns null if the file is in the old format
        $filename = MediaFile::decodeFilename(basename($this->filepath));
        // Encoding null makes the file use 'untitled', and also replaces the extension
        $outfilename = MediaFile::encodeFilename($filename, $this->filehash, $ext);

        // The boundary box for our resizing
        $box = [
            'width' => $width, 'height' => $height,
            'x' => $x, 'y' => $y,
            'w' => $w, 'h' => $h,
        ];

        $outpath = File_thumbnail::path(
            "thumb-{$this->fileRecord->id}-{$box['width']}x{$box['height']}-{$outfilename}"
        );

        // Doublecheck that parameters are sane and integers.
        if ($box['width'] < 1 || $box['width'] > common_config('thumbnail', 'maxsize')
            || $box['height'] < 1 || $box['height'] > common_config('thumbnail', 'maxsize')
            || $box['w'] < 1 || $box['x'] >= $this->width
            || $box['h'] < 1 || $box['y'] >= $this->height) {
            // Fail on bad width parameter. If this occurs, it's due to algorithm in ImageFile->scaleToFit
            common_debug("Boundary box parameters for resize of {$this->filepath} : " . var_export($box, true));
            throw new ServerException('Bad thumbnail size parameters.');
        }

        common_debug(sprintf(
            'Generating a thumbnail of File id=%u of size %ux%u',
            $this->fileRecord->getID(),
            $width,
            $height
        ));

        $this->height = $box['height'];
        $this->width = $box['width'];

        // Perform resize and store into file
        $outpath = $this->resizeTo($outpath, $box);
        $outname = basename($outpath);

        return File_thumbnail::saveThumbnail(
            $this->fileRecord->getID(),
            $this->fileRecord->getUrl(false),
            $width,
            $height,
            $outname
        );
    }
}


code:
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * widget for displaying notice attachments thumbnails
 *
 * PHP version 5
 *
 * LICENCE: 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 <http://www.gnu.org/licenses/>.
 *
 * @category  UI
 * @package   StatusNet
 * @author    Brion Vibber <brion@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('GNUSOCIAL')) { exit(1); }

class InlineAttachmentList extends AttachmentList
{
    function showListStart()
    {
        $this->out->element('h4', 'attachments-title', _('Attachments'));
        parent::showListStart();
    }

    /**
     * returns a new list item for the current attachment
     *
     * @param File $notice the current attachment
     *
     * @return ListItem a list item for displaying the attachment
     */
    function newListItem(File $attachment)
    {
        return new InlineAttachmentListItem($attachment, $this->out);
    }
}


code:
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * widget for displaying notice attachments thumbnails
 *
 * PHP version 5
 *
 * LICENCE: 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 <http://www.gnu.org/licenses/>.
 *
 * @category  UI
 * @package   StatusNet
 * @author    Brion Vibber <brion@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('GNUSOCIAL')) { exit(1); }

class InlineAttachmentListItem extends AttachmentListItem
{
    /**
     * start a single notice.
     *
     * @return void
     */
    function showStart()
    {
        // XXX: RDFa
        // TODO: add notice_type class e.g., notice_video, notice_image
        $this->out->elementStart('li',
            [
                'class' => 'inline-attachment',
                'id'    => 'attachment-' . $this->attachment->getID(),
            ]
        );
    }

    /**
     * finish the notice
     *
     * Close the last elements in the notice list item
     *
     * @return void
     */
    function showEnd()
    {
        $this->out->elementEnd('li');
    }
}


code:
<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Abstraction for media files
 *
 * @category  Media
 * @package   GNUsocial
 *
 * @author    Robin Millette <robin@millette.info>
 * @author    Miguel Dantas <biodantas@gmail.com>
 * @author    Zach Copley <zach@status.net>
 * @author    Mikael Nordfeldth <mmn@hethane.se>
 * @author    Diogo Cordeiro <diogo@fc.up.pt>
 * @copyright 2008-2009, 2019-2020 Free Software Foundation http://fsf.org
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 */
defined('GNUSOCIAL') || die();

require_once INSTALLDIR . '/lib/util/tempfile.php';

/**
 * Class responsible for abstracting media files
 */
class MediaFile
{
    public $id;
    public $filepath;
    public $filename;
    public $fileRecord;
    public $fileurl;
    public $short_fileurl;
    public $mimetype;

    /**
     * MediaFile constructor.
     *
     * @param string|null $filepath The path of the file this media refers to. Required
     * @param string $mimetype The mimetype of the file. Required
     * @param string|null $filehash The hash of the file, if known. Optional
     * @param int|null $id The DB id of the file. Int if known, null if not.
     *                     If null, it searches for it. If -1, it skips all DB
     *                     interactions (useful for temporary objects)
     * @param string|null $fileurl Provide if remote
     * @throws ClientException
     * @throws NoResultException
     * @throws ServerException
     */
    public function __construct(?string $filepath = null, string $mimetype, ?string $filehash = null, ?int $id = null, ?string $fileurl = null)
    {
        $this->filepath = $filepath;
        $this->filename = basename($this->filepath);
        $this->mimetype = $mimetype;
        $this->filehash = is_null($filepath) ? null : self::getHashOfFile($this->filepath, $filehash);
        $this->id       = $id;
        $this->fileurl  = $fileurl;

        // If id is -1, it means we're dealing with a temporary object and don't want to store it in the DB,
        // or add redirects
        if ($this->id !== -1) {
            if (!empty($this->id)) {
                // If we have an id, load it
                $this->fileRecord = new File();
                $this->fileRecord->id = $this->id;
                if (!$this->fileRecord->find(true)) {
                    // If we have set an ID, we need that ID to exist!
                    throw new NoResultException($this->fileRecord);
                }
            } else {
                // Otherwise, store it
                $this->fileRecord = $this->storeFile();
            }
        }
    }

    /**
     * Shortcut method to get a MediaFile from a File
     *
     * @param File $file
     * @return MediaFile|ImageFile
     * @throws ClientException
     * @throws FileNotFoundException
     * @throws NoResultException
     * @throws ServerException
     */
    public static function fromFileObject(File $file)
    {
        $filepath = null;
        try {
            $filepath = $file->getPath();
        } catch (Exception $e) {}
        return new self($filepath, common_get_mime_media($file->mimetype), $file->filehash, $file->getID());
    }

    public function attachToNotice(Notice $notice)
    {
        File_to_post::processNew($this->fileRecord, $notice);
    }

    public function getPath()
    {
        return File::path($this->filename);
    }

    /**
     * @param bool|null $use_local true means require local, null means prefer original, false means use whatever is stored
     * @return string
     */
    public function getUrl(?bool $use_local=null): ?string
    {
        if ($use_local !== false) {
            if (empty($this->fileurl)) {
                // A locally stored file, so let's generate a URL for our instance.
                return common_local_url('attachment_view', ['filehash' => $this->filehash]);
            }
        }

        // The original file's URL
        return $this->fileurl;
    }

    public function shortUrl()
    {
        return common_shorten_url($this->getUrl());
    }

    public function getEnclosure()
    {
        return $this->getFile()->getEnclosure();
    }

    public function delete($useWhere=false)
    {
        if (!is_null($this->fileRecord)) {
            $this->fileRecord->delete($useWhere);
        }
        @unlink($this->filepath);
    }

    public function unlink()
    {
        $this->filename = null;
        // Delete the file, if it exists locally
        if (!empty($this->filepath) && file_exists($this->filepath)) {
            $deleted = @unlink($this->filepath);
            if (!$deleted) {
                common_log(LOG_ERR, sprintf('Could not unlink existing file: "%s"', $this->filepath));
            }
        }
        $this->fileRecord->unlink();
    }

    public function getFile()
    {
        if (!$this->fileRecord instanceof File) {
            throw new ServerException('File record did not exist for MediaFile');
        }

        return $this->fileRecord;
    }

    /**
     * Calculate the hash of a file.
     *
     * This won't work for files >2GiB because PHP uses only 32bit.
     *
     * @param string $filepath
     * @param null|string $filehash
     *
     * @return string
     * @throws ServerException
     *
     */
    public static function getHashOfFile(string $filepath, $filehash = null)
    {
        assert(!empty($filepath), __METHOD__ . ': filepath cannot be null');
        if ($filehash === null) {
            // Calculate if we have an older upload method somewhere (Qvitter) that
            // doesn't do this before calling new MediaFile on its local files...
            $filehash = hash_file(File::FILEHASH_ALG, $filepath);
            if ($filehash === false) {
                throw new ServerException('Could not read file for hashing');
            }
        }
        return $filehash;
    }

    /**
     * Retrieve or insert as a file in the DB
     *
     * @return object File
     * @throws ServerException
     *
     * @throws ClientException
     */
    protected function storeFile()
    {
        try {
            $file = File::getByHash($this->filehash);
            if (is_null($this->fileurl) && is_null($file->getUrl(false))) {
                // An already existing local file is being re-added, return it
                return $file;
            }
        } catch (NoResultException $e) {
            // Well, let's just continue below.
        }

        $file = new File;

        $file->filename = $this->filename;
        $file->url = $this->fileurl;
        $file->urlhash = is_null($file->url) ? null : File::hashurl($file->url);
        $file->filehash = $this->filehash;
        $file->size = filesize($this->filepath);
        if ($file->size === false) {
            throw new ServerException('Could not read file to get its size');
        }
        $file->date = time();
        $file->mimetype = $this->mimetype;

        $file_id = $file->insert();

        if ($file_id === false) {
            common_log_db_error($file, 'INSERT', __FILE__);
            // TRANS: Client exception thrown when a database error was thrown during a file upload operation.
            throw new ClientException(_m('There was a database error while saving your file. Please try again.'));
        }

        // Set file geometrical properties if available
        try {
            $image = ImageFile::fromFileObject($file);
            $orig = clone($file);
            $file->width = $image->width;
            $file->height = $image->height;
            $file->update($orig);

            // We have to cleanup after ImageFile, since it
            // may have generated a temporary file from a
            // video support plugin or something.
            // FIXME: Do this more automagically.
            // Honestly, I think this is unlikely these days,
            // but better be safe than sure, I guess
            if ($image->getPath() != $file->getPath()) {
                $image->unlink();
            }
        } catch (ServerException $e) {
            // We just couldn't make out an image from the file. This
            // does not have to be UnsupportedMediaException, as we can
            // also get ServerException from files not existing etc.
        }

        return $file;
    }

    /**
     * The maximum allowed file size, as a string
     */
    public static function maxFileSize()
    {
        $value = self::maxFileSizeInt();
        if ($value > 1024 * 1024) {
            $value = $value / (1024 * 1024);
            // TRANS: Number of megabytes. %d is the number.
            return sprintf(_m('%dMB', '%dMB', $value), $value);
        } elseif ($value > 1024) {
            $value = $value / 1024;
            // TRANS: Number of kilobytes. %d is the number.
            return sprintf(_m('%dkB', '%dkB', $value), $value);
        } else {
            // TRANS: Number of bytes. %d is the number.
            return sprintf(_m('%dB', '%dB', $value), $value);
        }
    }

    /**
     * The maximum allowed file size, as an int
     */
    public static function maxFileSizeInt(): int
    {
        return common_config('attachments', 'file_quota');
    }

    /**
     * Encodes a file name and a file hash in the new file format, which is used to avoid
     * having an extension in the file, removing trust in extensions, while keeping the original name
     *
     * @param null|string $original_name
     * @param string $filehash
     * @param null|string|bool $ext from File::getSafeExtension
     *
     * @return string
     * @throws ClientException
     * @throws ServerException
     */
    public static function encodeFilename($original_name, string $filehash, $ext = null): string
    {
        if (empty($original_name)) {
            $original_name = _m('Untitled attachment');
        }

        // If we're given an extension explicitly, use it, otherwise...
        $ext = $ext ?:
            // get a replacement extension if configured, returns false if it's blocked,
            // null if no extension
            File::getSafeExtension($original_name);
        if ($ext === false) {
            throw new ClientException(_m('Blacklisted file extension.'));
        }

        if (!empty($ext)) {
            // Remove dots if we have them (make sure they're not repeated)
            $ext = preg_replace('/^\.+/', '', $ext);
            $original_name = preg_replace('/\.+.+$/i', ".{$ext}", $original_name);
        }

        $enc_name = bin2hex($original_name);
        return "{$enc_name}-{$filehash}";
    }

    /**
     * Decode the new filename format
     *
     * @return false | null | string on failure, no match (old format) or original file name, respectively
     */
    public static function decodeFilename(string $encoded_filename)
    {
        // Should match:
        //   hex-hash
        //   thumb-id-widthxheight-hex-hash
        // And return the `hex` part
        $ret = preg_match('/^(.*-)?([^-]+)-[^-]+$/', $encoded_filename, $matches);
        if ($ret === false) {
            return false;
        } elseif ($ret === 0 || !ctype_xdigit($matches[2])) {
            return null; // No match
        } else {
            $filename = hex2bin($matches[2]);

            // Matches extension
            if (preg_match('/^(.+?)\.(.+)$/', $filename, $sub_matches) === 1) {
                $ext = $sub_matches[2];
                // Previously, there was a blacklisted extension array, which could have an alternative
                // extension, such as phps, to replace php. We want to turn it back (this is deprecated,
                // as it no longer makes sense, since we don't trust trust files based on extension,
                // but keep the feature)
                $blacklist = common_config('attachments', 'extblacklist');
                if (is_array($blacklist)) {
                    foreach ($blacklist as $upload_ext => $safe_ext) {
                        if ($ext === $safe_ext) {
                            $ext = $upload_ext;
                            break;
                        }
                    }
                }
                return "{$sub_matches[1]}.{$ext}";
            } else {
                // No extension, don't bother trying to replace it
                return $filename;
            }
        }
    }

    /**
     * Create a new MediaFile or ImageFile object from an upload
     *
     * Tries to set the mimetype correctly, using the most secure method available and rejects the file otherwise.
     * In case the upload is an image, this function returns an new ImageFile (which extends MediaFile)
     * The filename has a new format:
     *   bin2hex("{$original_name}.{$ext}")."-{$filehash}"
     * This format should be respected. Notice the dash, which is important to distinguish it from the previous
     * format ("{$hash}.{$ext}")
     *
     * @param string $param Form name
     * @param Profile|null $scoped
     * @return ImageFile|MediaFile
     * @throws ClientException
     * @throws InvalidFilenameException
     * @throws NoResultException
     * @throws NoUploadedMediaException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     */
    public static function fromUpload(string $param = 'media', ?Profile $scoped = null)
    {
        // The existence of the "error" element means PHP has processed it properly even if it was ok.
        if (!(isset($_FILES[$param], $_FILES[$param]['error']))) {
            throw new NoUploadedMediaException($param);
        }

        switch ($_FILES[$param]['error']) {
            case UPLOAD_ERR_OK: // success, jump out
                break;
            case UPLOAD_ERR_INI_SIZE:
            case UPLOAD_ERR_FORM_SIZE:
                // TRANS: Exception thrown when too large a file is uploaded.
                // TRANS: %s is the maximum file size, for example "500b", "10kB" or "2MB".
                throw new ClientException(sprintf(
                    _m('That file is too big. The maximum file size is %s.'),
                    self::maxFileSize()
                ));
            case UPLOAD_ERR_PARTIAL:
                @unlink($_FILES[$param]['tmp_name']);
                // TRANS: Client exception.
                throw new ClientException(_m('The uploaded file was only partially uploaded.'));
            case UPLOAD_ERR_NO_FILE:
                // No file; probably just a non-AJAX submission.
                throw new NoUploadedMediaException($param);
            case UPLOAD_ERR_NO_TMP_DIR:
                // TRANS: Client exception thrown when a temporary folder is not present to store a file upload.
                throw new ClientException(_m('Missing a temporary folder.'));
            case UPLOAD_ERR_CANT_WRITE:
                // TRANS: Client exception thrown when writing to disk is not possible during a file upload operation.
                throw new ClientException(_m('Failed to write file to disk.'));
            case UPLOAD_ERR_EXTENSION:
                // TRANS: Client exception thrown when a file upload operation has been stopped by an extension.
                throw new ClientException(_m('File upload stopped by extension.'));
            default:
                common_log(LOG_ERR, __METHOD__ . ': Unknown upload error ' . $_FILES[$param]['error']);
                // TRANS: Client exception thrown when a file upload operation has failed with an unknown reason.
                throw new ClientException(_m('System error uploading file.'));
        }

        $filehash = strtolower(self::getHashOfFile($_FILES[$param]['tmp_name']));

        try {
            $file = File::getByHash($filehash);
            while ($file->fetch()) {
                if ($file->getUrl(false)) {
                    continue;
                }
                try {
                    return ImageFile::fromFileObject($file);
                } catch (UnsupportedMediaException $e) {
                    return MediaFile::fromFileObject($file);
                }
            }
            // If no exception is thrown the file exists locally, so we'll use that and just add redirections.
            // but if the _actual_ locally stored file doesn't exist, getPath will throw FileNotFoundException
            $filepath = $file->getPath();
            $mimetype = $file->mimetype;
        } catch (FileNotFoundException | NoResultException $e) {
            // We have to save the upload as a new local file. This is the normal course of action.
            if ($scoped instanceof Profile) {
                // Throws exception if additional size does not respect quota
                // This test is only needed, of course, if we're uploading something new.
                File::respectsQuota($scoped, $_FILES[$param]['size']);
            }

            $mimetype = self::getUploadedMimeType($_FILES[$param]['tmp_name'], $_FILES[$param]['name']);
            $media = common_get_mime_media($mimetype);

            $basename = basename($_FILES[$param]['name']);

            if ($media == 'image') {
                // Use -1 for the id to avoid adding this temporary file to the DB
                $img = new ImageFile(-1, $_FILES[$param]['tmp_name']);
                // Validate the image by re-encoding it. Additionally normalizes old formats to WebP,
                // keeping GIF untouched if animated
                $outpath = $img->resizeTo($img->filepath);
                $ext = image_type_to_extension($img->preferredType(), false);
            }
            $filename = self::encodeFilename($basename, $filehash, isset($ext) ? $ext : File::getSafeExtension($basename));

            $filepath = File::path($filename);

            if ($media == 'image') {
                $result = rename($outpath, $filepath);
            } else {
                $result = move_uploaded_file($_FILES[$param]['tmp_name'], $filepath);
            }
            if (!$result) {
                // TRANS: Client exception thrown when a file upload operation fails because the file could
                // TRANS: not be moved from the temporary folder to the permanent file location.
                // UX: too specific
                throw new ClientException(_m('File could not be moved to destination directory.'));
            }

            if ($media == 'image') {
                return new ImageFile(null, $filepath, $filehash);
            }
        }
        return new self($filepath, $mimetype, $filehash, null);
    }

    /**
     * Create a new MediaFile or ImageFile object from an url
     *
     * Tries to set the mimetype correctly, using the most secure method available and rejects the file otherwise.
     * In case the url is an image, this function returns an new ImageFile (which extends MediaFile)
     * The filename has the following format: bin2hex("{$original_name}.{$ext}")."-{$filehash}"
     *
     * @param string $url Remote media URL
     * @param Profile|null $scoped
     * @param string|null $name
     * @return ImageFile|MediaFile
     * @throws ClientException
     * @throws FileNotFoundException
     * @throws InvalidFilenameException
     * @throws NoResultException
     * @throws ServerException
     * @throws UnsupportedMediaException
     * @throws UseFileAsThumbnailException
     */
    public static function fromUrl(string $url, ?Profile $scoped = null, ?string $name = null)
    {
        if (!common_valid_http_url($url)) {
            // TRANS: Server exception. %s is a URL.
            throw new ServerException(sprintf('Invalid remote media URL %s.', $url));
        }

        $http = new HTTPClient();
        common_debug(sprintf('Performing HEAD request for incoming activity to avoid ' .
            'unnecessarily downloading too large files. URL: %s',
            $url));
        $head = $http->head($url);
        $url = $head->getEffectiveUrl();   // to avoid going through redirects again
        if (empty($url)) {
            throw new ServerException(sprintf('URL after redirects is somehow empty, for URL %s.', $url));
        }
        $headers = $head->getHeader();
        $headers = array_change_key_case($headers, CASE_LOWER);
        if (array_key_exists('content-length', $headers)) {
            $fileQuota = common_config('attachments', 'file_quota');
            $fileSize = $headers['content-length'];
            if ($fileSize > $fileQuota) {
                // TRANS: Message used to be inserted as %2$s in  the text "No file may
                // TRANS: be larger than %1$d byte and the file you sent was %2$s.".
                // TRANS: %1$d is the number of bytes of an uploaded file.
                $fileSizeText = sprintf(_m('%1$d byte', '%1$d bytes', $fileSize), $fileSize);

                // TRANS: Message given if an upload is larger than the configured maximum.
                // TRANS: %1$d (used for plural) is the byte limit for uploads,
                // TRANS: %2$s is the proper form of "n bytes". This is the only ways to have
                // TRANS: gettext support multiple plurals in the same message, unfortunately...
                throw new ClientException(
                    sprintf(
                        _m(
                            'No file may be larger than %1$d byte and the file you sent was %2$s. Try to upload a smaller version.',
                            'No file may be larger than %1$d bytes and the file you sent was %2$s. Try to upload a smaller version.',
                            $fileQuota
                        ),
                        $fileQuota,
                        $fileSizeText
                    )
                );
            }
        } else {
            throw new ServerException(sprintf('Invalid remote media URL headers %s.', $url));
        }
        unset($head);
        unset($headers);

        $tempfile = new TemporaryFile('gs-mediafile');
        fwrite($tempfile->getResource(), HTTPClient::quickGet($url));
        fflush($tempfile->getResource());

        $filehash = strtolower(self::getHashOfFile($tempfile->getRealPath()));

        try {
            $file = File::getByUrl($url);
            /*
             * If no exception is thrown the file exists locally, so we'll use
             * that and just add redirections.
             * But if the _actual_ locally stored file doesn't exist, getPath
             * will throw FileNotFoundException.
             */
            $filepath = $file->getPath();
            $mimetype = $file->mimetype;
        } catch (FileNotFoundException | NoResultException $e) {
            // We have to save the downloaded as a new local file.
            // This is the normal course of action.
            if ($scoped instanceof Profile) {
                // Throws exception if additional size does not respect quota
                // This test is only needed, of course, if something new is uploaded.
                File::respectsQuota($scoped, filesize($tempfile->getRealPath()));
            }

            $mimetype = self::getUploadedMimeType(
                $tempfile->getRealPath(),
                $name ?? false
            );
            $media = common_get_mime_media($mimetype);

            $basename = basename($name ?? ('media' . common_timestamp()));

            if ($media === 'image') {
                // Use -1 for the id to avoid adding this temporary file to the DB.
                $img = new ImageFile(-1, $tempfile->getRealPath());
                // Validate the image by re-encoding it.
                // Additionally normalises old formats to PNG,
                // keeping JPEG and GIF untouched.
                $outpath = $img->resizeTo($img->filepath);
                $ext = image_type_to_extension($img->preferredType(), false);
            }
            $filename = self::encodeFilename(
                $basename,
                $filehash,
                $ext ?? File::getSafeExtension($basename)
            );

            $filepath = File::path($filename);

            if ($media === 'image') {
                $result = rename($outpath, $filepath);
            } else {
                try {
                    $tempfile->commit($filepath);
                    $result = true;
                } catch (TemporaryFileException $e) {
                    $result = false;
                }
            }
            if (!$result) {
                // TRANS: Server exception thrown when a file upload operation fails because the file could
                // TRANS: not be moved from the temporary directory to the permanent file location.
                throw new ServerException(_m('File could not be moved to destination directory.'));
            }

            if ($media === 'image') {
                return new ImageFile(null, $filepath, $filehash, $url);
            }
        }
        return new self($filepath, $mimetype, $filehash, null, $url);
    }

    public static function fromFileInfo(SplFileInfo $finfo, Profile $scoped = null)
    {
        $filehash = hash_file(File::FILEHASH_ALG, $finfo->getRealPath());

        try {
            $file = File::getByHash($filehash);
            $file->fetch();
            // Already have it, so let's reuse the locally stored File
            // by using getPath we also check whether the file exists
            // and throw a FileNotFoundException with the path if it doesn't.
            $filename = basename($file->getPath());
            $mimetype = $file->mimetype;
        } catch (FileNotFoundException $e) {
            // This happens if the file we have uploaded has disappeared
            // from the local filesystem for some reason. Since we got the
            // File object from a sha256 check in fromFileInfo, it's safe
            // to just copy the uploaded data to disk!

            // dump the contents of our filehandle to the path from our exception
            // and report error if it failed.
            if (file_put_contents($e->path, file_get_contents($finfo->getRealPath())) === false) {
                // TRANS: Client exception thrown when a file upload operation fails because the file could
                // TRANS: not be moved from the temporary folder to the permanent file location.
                throw new ClientException(_m('File could not be moved to destination directory.'));
            }
            if (!chmod($e->path, 0664)) {
                common_log(LOG_ERR, 'Could not chmod uploaded file: ' . _ve($e->path));
            }

            $filename = basename($file->getPath());
            $mimetype = $file->mimetype;
        } catch (NoResultException $e) {
            if ($scoped instanceof Profile) {
                File::respectsQuota($scoped, filesize($finfo->getRealPath()));
            }

            $mimetype = self::getUploadedMimeType($finfo->getRealPath());

            $filename = strtolower($filehash) . '.' . File::guessMimeExtension($mimetype);
            $filepath = File::path($filename);

            $result = copy($finfo->getRealPath(), $filepath) && chmod($filepath, 0664);

            if (!$result) {
                common_log(LOG_ERR, 'File could not be moved (or chmodded) from ' . _ve($stream['uri']) . ' to ' . _ve($filepath));
                // TRANS: Client exception thrown when a file upload operation fails because the file could
                // TRANS: not be moved from the temporary folder to the permanent file location.
                throw new ClientException(_m('File could not be moved to destination directory.'));
            }
        }

        return new self($filename, $mimetype, $filehash);
    }

    /**
     * Attempt to identify the content type of a given file.
     *
     * @param string $filepath filesystem path as string (file must exist)
     * @param bool $originalFilename (optional) for extension-based detection
     *
     * @return string
     *
     * @fixme this seems to tie a front-end error message in, kinda confusing
     *
     * @throws ServerException
     *
     * @throws ClientException if type is known, but not supported for local uploads
     */
    public static function getUploadedMimeType(string $filepath, $originalFilename = false)
    {
        // We only accept filenames to existing files

        $mimetype = null;

        // From CodeIgniter
        // We'll need this to validate the MIME info string (e.g. text/plain; charset=us-ascii)
        $regexp = '/^([a-z\-]+\/[a-z0-9\-\.\+]+)(;\s[^\/]+)?$/';
        /**
         * Fileinfo extension - most reliable method
         *
         * Apparently XAMPP, CentOS, cPanel and who knows what
         * other PHP distribution channels EXPLICITLY DISABLE
         * ext/fileinfo, which is otherwise enabled by default
         * since PHP 5.3 ...
         */
        if (function_exists('finfo_file')) {
            $finfo = @finfo_open(FILEINFO_MIME);
            // It is possible that a FALSE value is returned, if there is no magic MIME database
            // file found on the system
            if (is_resource($finfo)) {
                $mime = @finfo_file($finfo, $filepath);
                finfo_close($finfo);
                /* According to the comments section of the PHP manual page,
                 * it is possible that this function returns an empty string
                 * for some files (e.g. if they don't exist in the magic MIME database)
                 */
                if (is_string($mime) && preg_match($regexp, $mime, $matches)) {
                    $mimetype = $matches[1];
                }
            }
        }
        /* This is an ugly hack, but UNIX-type systems provide a "native" way to detect the file type,
         * which is still more secure than depending on the value of $_FILES[$field]['type'], and as it
         * was reported in issue #750 (https://github.com/EllisLab/CodeIgniter/issues/750) - it's better
         * than mime_content_type() as well, hence the attempts to try calling the command line with
         * three different functions.
         *
         * Notes:
         *  - the DIRECTORY_SEPARATOR comparison ensures that we're not on a Windows system
         *  - many system admins would disable the exec(), shell_exec(), popen() and similar functions
         *    due to security concerns, hence the function_usable() checks
         */
        if (DIRECTORY_SEPARATOR !== '\\') {
            $cmd = 'file --brief --mime ' . escapeshellarg($filepath) . ' 2>&1';
            if (empty($mimetype) && function_exists('exec')) {
                /* This might look confusing, as $mime is being populated with all of the output
                 * when set in the second parameter. However, we only need the last line, which is
                 * the actual return value of exec(), and as such - it overwrites anything that could
                 * already be set for $mime previously. This effectively makes the second parameter a
                 * dummy value, which is only put to allow us to get the return status code.
                 */
                $mime = @exec($cmd, $mime, $return_status);
                if ($return_status === 0 && is_string($mime) && preg_match($regexp, $mime, $matches)) {
                    $mimetype = $matches[1];
                }
            }
            if (empty($mimetype) && function_exists('shell_exec')) {
                $mime = @shell_exec($cmd);
                if (strlen($mime) > 0) {
                    $mime = explode("\n", trim($mime));
                    if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)) {
                        $mimetype = $matches[1];
                    }
                }
            }
            if (empty($mimetype) && function_exists('popen')) {
                $proc = @popen($cmd, 'r');
                if (is_resource($proc)) {
                    $mime = @fread($proc, 512);
                    @pclose($proc);
                    if ($mime !== false) {
                        $mime = explode("\n", trim($mime));
                        if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)) {
                            $mimetype = $matches[1];
                        }
                    }
                }
            }
        }
        // Fall back to mime_content_type(), if available (still better than $_FILES[$field]['type'])
        if (empty($mimetype) && function_exists('mime_content_type')) {
            $mimetype = @mime_content_type($filepath);
            // It's possible that mime_content_type() returns FALSE or an empty string
            if ($mimetype == false && strlen($mimetype) > 0) {
                throw new ServerException(_m('Could not determine file\'s MIME type.'));
            }
        }

        // Unclear types are such that we can't really tell by the auto
        // detect what they are (.bin, .exe etc. are just "octet-stream")
        $unclearTypes = ['application/octet-stream',
            'application/vnd.ms-office',
            'application/zip',
            'text/plain',
            'text/html',  // Ironically, Wikimedia Commons' SVG_logo.svg is identified as text/html
            // TODO: for XML we could do better content-based sniffing too
            'text/xml',];

        $supported = common_config('attachments', 'supported');

        // If we didn't match, or it is an unclear match
        if ($originalFilename && (!$mimetype || in_array($mimetype, $unclearTypes))) {
            try {
                $type = common_supported_filename_to_mime($originalFilename);
                return $type;
            } catch (UnknownExtensionMimeException $e) {
                // FIXME: I think we should keep the file extension here (supported should be === true here)
            } catch (Exception $e) {
                // Extension parsed but no connected mimetype, so $mimetype is our best guess
            }
        }

        // If $config['attachments']['supported'] equals boolean true, accept any mimetype
        if ($supported === true || array_key_exists($mimetype, $supported)) {
            // FIXME: Don't know if it always has a mimetype here because
            // finfo->file CAN return false on error: http://php.net/finfo_file
            // so if $supported === true, this may return something unexpected.
            return $mimetype;
        }

        // We can conclude that we have failed to get the MIME type
        $media = common_get_mime_media($mimetype);
        if ('application' !== $media) {
            // TRANS: Client exception thrown trying to upload a forbidden MIME type.
            // TRANS: %1$s is the file type that was denied, %2$s is the application part of
            // TRANS: the MIME type that was denied.
            $hint = sprintf(_m('"%1$s" is not a supported file type on this server. ' .
                'Try using another %2$s format.'), $mimetype, $media);
        } else {
            // TRANS: Client exception thrown trying to upload a forbidden MIME type.
            // TRANS: %s is the file type that was denied.
            $hint = sprintf(_m('"%s" is not a supported file type on this server.'), $mimetype);
        }
        throw new ClientException($hint);
    }

    /**
     * Title for a file, to display in the interface (if there's no better title) and
     * for download filenames
     *
     * @param $file File object
     * @returns string
     */
    public static function getDisplayName(File $file): string
    {
        if (empty($file->filename)) {
            return _m('Untitled attachment');
        }

        // New file name format is "{bin2hex(original_name.ext)}-{$hash}"
        $filename = self::decodeFilename($file->filename);

        // If there was an error in the match, something's wrong with some piece
        // of code (could be a file with utf8 chars in the name)
        $log_error_msg = "Invalid file name for File with id={$file->id} " .
            "({$file->filename}). Some plugin probably did something wrong.";
        if ($filename === false) {
            common_log(LOG_ERR, $log_error_msg);
        } elseif ($filename === null) {
            // The old file name format was "{hash}.{ext}" so we didn't have a name
            // This extracts the extension
            $ret = preg_match('/^.+?\.+?(.+)$/', $file->filename, $matches);
            if ($ret !== 1) {
                common_log(LOG_ERR, $log_error_msg);
                return _m('Untitled attachment');
            }
            $ext = $matches[1];
            // There's a blacklisted extension array, which could have an alternative
            // extension, such as phps, to replace php. We want to turn it back
            // (currently defaulted to empty, but let's keep the feature)
            $blacklist = common_config('attachments', 'extblacklist');
            if (is_array($blacklist)) {
                foreach ($blacklist as $upload_ext => $safe_ext) {
                    if ($ext === $safe_ext) {
                        $ext = $upload_ext;
                        break;
                    }
                }
            }
            $filename = "untitled.{$ext}";
        }
        return $filename;
    }
}