<?php
namespace RedMatrix\RedDAV;
use Sabre\DAV;
/**
* @brief Provides a DAV frontend for the webbrowser.
*
* RedBrowser is a SabreDAV server-plugin to provide a view to the DAV storage
* for the webbrowser.
*
* @extends \Sabre\DAV\Browser\Plugin
*
* @link http://github.com/friendica/red
* @license http://opensource.org/licenses/mit-license.php The MIT License (MIT)
*/
class RedBrowser extends DAV\Browser\Plugin {
/**
* @see set_writeable()
* @see \Sabre\DAV\Auth\Backend\BackendInterface
* @var RedBasicAuth
*/
private $auth;
/**
* @brief Constructor for RedBrowser class.
*
* $enablePost will be activated through set_writeable() in a later stage.
* At the moment the write_storage permission is only valid for the whole
* folder. No file specific permissions yet.
* @todo disable enablePost by default and only activate if permissions
* grant edit rights.
*
* Disable assets with $enableAssets = false. Should get some thumbnail views
* anyway.
*
* @param RedBasicAuth &$auth
*/
public function __construct(&$auth) {
$this->auth = $auth;
parent::__construct(true, false);
}
/**
* The DAV browser is instantiated after the auth module and directory classes
* but before we know the current directory and who the owner and observer
* are. So we add a pointer to the browser into the auth module and vice versa.
* Then when we've figured out what directory is actually being accessed, we
* call the following function to decide whether or not to show web elements
* which include writeable objects.
*
* @fixme It only disable/enable the visible parts. Not the POST handler
* which handels the actual requests when uploading files or creating folders.
*
* @todo Maybe this whole way of doing this can be solved with some
* $server->subscribeEvent().
*/
public function set_writeable() {
if (! $this->auth->owner_id) {
$this->enablePost = false;
}
if (! perm_is_allowed($this->auth->owner_id, get_observer_hash(), 'write_storage')) {
$this->enablePost = false;
} else {
$this->enablePost = true;
}
}
/**
* @brief Creates the directory listing for the given path.
*
* @param string $path which should be displayed
*/
public function generateDirectoryIndex($path) {
// (owner_id = channel_id) is visitor owner of this directory?
$is_owner = ((local_user() && $this->auth->owner_id == local_user()) ? true : false);
if ($this->auth->getTimezone())
date_default_timezone_set($this->auth->getTimezone());
require_once('include/conversation.php');
if ($this->auth->owner_nick) {
$html = profile_tabs(get_app(), (($is_owner) ? true : false), $this->auth->owner_nick);
}
$files = $this->server->getPropertiesForPath($path, array(
'{DAV:}displayname',
'{DAV:}resourcetype',
'{DAV:}getcontenttype',
'{DAV:}getcontentlength',
'{DAV:}getlastmodified',
), 1);
$parent = $this->server->tree->getNodeForPath($path);
$parentpath = array();
// only show parent if not leaving /cloud/; TODO how to improve this?
if ($path && $path != "cloud") {
list($parentUri) = DAV\URLUtil::splitPath($path);
$fullPath = DAV\URLUtil::encodePath($this->server->getBaseUri() . $parentUri);
$parentpath['icon'] = $this->enableAssets ? '<a href="' . $fullPath . '"><img src="' . $this->getAssetUrl('icons/parent' . $this->iconExtension) . '" width="24" alt="' . t('parent') . '"></a>' : '';
$parentpath['path'] = $fullPath;
}
$f = array();
foreach ($files as $file) {
$ft = array();
$type = null;
// This is the current directory, we can skip it
if (rtrim($file['href'],'/') == $path) continue;
list(, $name) = DAV\URLUtil::splitPath($file['href']);
if (isset($file[200]['{DAV:}resourcetype'])) {
$type = $file[200]['{DAV:}resourcetype']->getValue();
// resourcetype can have multiple values
if (!is_array($type)) $type = array($type);
foreach ($type as $k=>$v) {
// Some name mapping is preferred
switch ($v) {
case '{DAV:}collection' :
$type[$k] = t('Collection');
break;
case '{DAV:}principal' :
$type[$k] = t('Principal');
break;
case '{urn:ietf:params:xml:ns:carddav}addressbook' :
$type[$k] = t('Addressbook');
break;
case '{urn:ietf:params:xml:ns:caldav}calendar' :
$type[$k] = t('Calendar');
break;
case '{urn:ietf:params:xml:ns:caldav}schedule-inbox' :
$type[$k] = t('Schedule Inbox');
break;
case '{urn:ietf:params:xml:ns:caldav}schedule-outbox' :
$type[$k] = t('Schedule Outbox');
break;
case '{http://calendarserver.org/ns/}calendar-proxy-read' :
$type[$k] = 'Proxy-Read';
break;
case '{http://calendarserver.org/ns/}calendar-proxy-write' :
$type[$k] = 'Proxy-Write';
break;
}
}
$type = implode(', ', $type);
}
// If no resourcetype was found, we attempt to use
// the contenttype property
if (!$type && isset($file[200]['{DAV:}getcontenttype'])) {
$type = $file[200]['{DAV:}getcontenttype'];
}
if (!$type) $type = t('Unknown');
$size = isset($file[200]['{DAV:}getcontentlength']) ? (int)$file[200]['{DAV:}getcontentlength'] : '';
$lastmodified = ((isset($file[200]['{DAV:}getlastmodified'])) ? $file[200]['{DAV:}getlastmodified']->getTime()->format('Y-m-d H:i:s') : '');
$fullPath = DAV\URLUtil::encodePath('/' . trim($this->server->getBaseUri() . ($path ? $path . '/' : '') . $name, '/'));
$displayName = isset($file[200]['{DAV:}displayname']) ? $file[200]['{DAV:}displayname'] : $name;
$displayName = $this->escapeHTML($displayName);
$type = $this->escapeHTML($type);
$icon = '';
if ($this->enableAssets) {
$node = $this->server->tree->getNodeForPath(($path ? $path . '/' : '') . $name);
foreach (array_reverse($this->iconMap) as $class=>$iconName) {
if ($node instanceof $class) {
$icon = '<a href="' . $fullPath . '"><img src="' . $this->getAssetUrl($iconName . $this->iconExtension) . '" alt="" width="24"></a>';
break;
}
}
}
$parentHash = "";
$owner = $this->auth->owner_id;
$splitPath = split("/", $fullPath);
if (count($splitPath) > 3) {
for ($i = 3; $i < count($splitPath); $i++) {
$attachName = urldecode($splitPath[$i]);
$attachHash = $this->findAttachHash($owner, $parentHash, $attachName);
$parentHash = $attachHash;
}
}
$attachIcon = ""; // "<a href=\"attach/".$attachHash."\" title=\"".$displayName."\"><i class=\"icon-download\"></i></a>";
// put the array for this file together
$ft['attachId'] = $this->findAttachIdByHash($attachHash);
$ft['fileStorageUrl'] = substr($fullPath, 0, strpos($fullPath, "cloud/")) . "filestorage/" . $this->auth->getCurrentUser();
$ft['icon'] = $icon;
$ft['attachIcon'] = (($size) ? $attachIcon : '');
// @todo Should this be an item value, not a global one?
$ft['is_owner'] = $is_owner;
$ft['fullPath'] = $fullPath;
$ft['displayName'] = $displayName;
$ft['type'] = $type;
$ft['size'] = $size;
$ft['sizeFormatted'] = $this->userReadableSize($size);
$ft['lastmodified'] = (($lastmodified) ? datetime_convert('UTC', date_default_timezone_get(), $lastmodified) : '');
$f[] = $ft;
}
// Storage and quota for the account (all channels of the owner of this directory)!
$limit = service_class_fetch($owner, 'attach_upload_limit');
$r = q("SELECT SUM(filesize) AS total FROM attach WHERE aid = %d",
intval($this->auth->channel_account_id)
);
$used = $r[0]['total'];
if ($used) {
$quotaDesc = t('%1$s used');
$quotaDesc = sprintf($quotaDesc,
$this->userReadableSize($used));
}
if ($limit && $used) {
$quotaDesc = t('%1$s used of %2$s (%3$s%)');
$quotaDesc = sprintf($quotaDesc,
$this->userReadableSize($used),
$this->userReadableSize($limit),
round($used / $limit, 1));
}
// prepare quota for template
$quota['used'] = $used;
$quota['limit'] = $limit;
$quota['desc'] = $quotaDesc;
$html .= replace_macros(get_markup_template('cloud_directory.tpl'), array(
'$header' => t('Files') . ": " . $this->escapeHTML($path) . "/",
'$parentpath' => $parentpath,
'$entries' => $f,
'$quota' => $quota,
'$name' => t('Name'),
'$type' => t('Type'),
'$size' => t('Size'),
'$lastmod' => t('Last Modified'),
'$parent' => t('parent'),
'$edit' => t('Edit'),
'$delete' => t('Delete'),
'$total' => t('Total')
));
$output = '';
if ($this->enablePost) {
$this->server->broadcastEvent('onHTMLActionsPanel', array($parent, &$output));
}
$html .= $output;
get_app()->page['content'] = $html;
construct_page(get_app());
}
/**
* @brief Returns a human readable formatted string for filesizes.
*
* Don't we need such a functionality in other places, too?
*
* @param int $size filesize in bytes
* @return string
*/
function userReadableSize($size) {
$ret = "";
if (is_numeric($size)) {
$incr = 0;
$k = 1024;
$unit = array('bytes', 'KB', 'MB', 'GB', 'TB', 'PB');
while (($size / $k) >= 1){
$incr++;
$size = round($size / $k, 2);
}
$ret = $size . " " . $unit[$incr];
}
return $ret;
}
/**
* @brief Creates a form to add new folders and upload files.
*
* @param \Sabre\DAV\INode $node
* @param string &$output
*/
public function htmlActionsPanel(DAV\INode $node, &$output) {
if (! $node instanceof DAV\ICollection)
return;
// We also know fairly certain that if an object is a non-extended
// SimpleCollection, we won't need to show the panel either.
if (get_class($node) === 'Sabre\\DAV\\SimpleCollection')
return;
$output .= replace_macros(get_markup_template('cloud_actionspanel.tpl'), array(
'$folder_header' => t('Create new folder'),
'$folder_submit' => t('Create'),
'$upload_header' => t('Upload file'),
'$upload_submit' => t('Upload')
));
}
/**
* This method takes a path/name of an asset and turns it into url
* suiteable for http access.
*
* @param string $assetName
* @return string
*/
protected function getAssetUrl($assetName) {
return z_root() . '/cloud/?sabreAction=asset&assetName=' . urlencode($assetName);
}
/**
* @brief Return the hash of an attachment.
*
* Given the owner, the parent folder and and attach name get the attachment
* hash.
*
* @param int $owner
* The owner_id
* @param string $hash
* The parent's folder hash
* @param string $attachName
* The name of the attachment
* @return string
*/
protected function findAttachHash($owner, $parentHash, $attachName) {
$r = q("SELECT hash FROM attach WHERE uid = %d AND folder = '%s' AND filename = '%s' ORDER BY edited DESC LIMIT 1",
intval($owner),
dbesc($parentHash),
dbesc($attachName)
);
$hash = "";
if ($r) {
foreach ($r as $rr) {
$hash = $rr['hash'];
}
}
return $hash;
}
/**
* @brief Returns an attachment's id for a given hash.
*
* This id is used to access the attachment in filestorage/
*
* @param string $attachHash
* The hash of an attachment
* @return string
*/
protected function findAttachIdByHash($attachHash) {
$r = q("SELECT id FROM attach WHERE hash = '%s' ORDER BY edited DESC LIMIT 1",
dbesc($attachHash)
);
$id = "";
if ($r) {
foreach ($r as $rr) {
$id = $rr['id'];
}
}
return $id;
}
}
