<?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');
}
}