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egroupware/phpgwapi/inc/class.egw_link.inc.php

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<?php
/**
* API - Interapplicaton links BO layer
*
* Links have two ends each pointing to an entry, each entry is a double:
* - app app-name or directory-name of an egw application, eg. 'infolog'
* - id this is the id, eg. an integer or a tupple like '0:INBOX:1234'
*
* @link http://www.egroupware.org
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright 2001-2008 by RalfBecker@outdoor-training.de
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage link
* @version $Id$
*/
/**
* Generalized linking between entries of eGroupware apps
*
* Please note: this class can NOT and does not need to be initialised, all methods are static
*
* To participate in the linking an applications has to implement the following hooks:
*
* /**
* * Hook called by link-class to include app in the appregistry of the linkage
* *
* * @param array/string $location location and other parameters (not used)
* * @return array with method-names
* *%
* function search_link($location)
* {
* return array(
* 'query' => 'app.class.link_query', // method to search app for a pattern: array link_query(string $pattern)
* 'title' => 'app.class.link_title', // method to return title of an entry of app: string/false/null link_title(int/string $id)
* 'titles' => 'app.class.link_titles', // method to return multiple titles: array link_title(array $ids)
* 'view' => array( // get parameters to view an entry of app
* 'menuaction' => 'app.class.method',
* ),
* 'view_id' => 'app_id', // name of get parameter of the id
* 'view_popup' => '400x300', // size of popup (XxY), if view is in popup
* 'add' => array( // get parameter to add an empty entry to app
* 'menuaction' => 'app.class.method',
* ),
* 'add_app' => 'link_app', // name of get parameter to add links to other app
* 'add_id' => 'link_id', // --------------------- " ------------------- id
* 'add_popup' => '400x300', // size of popup (XxY), if add is in popup
* 'notify' => 'app.class.method', // method to be called if an other applications liks or unlinks with app: notify(array $data)
* 'file_access' => 'app.class.method', // method to be called to check file access rights, see links_stream_wrapper class
* // boolean file_access(string $id,int $check,string $rel_path)
* 'find_extra' => array('name_preg' => '/^(?!.picture.jpg)$/') // extra options to egw_vfs::find, to eg. remove some files from the list of attachments
* }
* All entries are optional, thought you only get conected functionality, if you implement them ...
*
* The BO-layer implementes some extra features on top of the so-layer:
* 1) It handles links to not already existing entries. This is used by the eTemplate link-widget, which allows to
* setup links even for new / not already existing entries, before they get saved.
* In that case you have to set the first id to 0 for the link-static function and pass the array returned in that id
* (not the return-value) after saveing your new entry again to the link static function.
* 2) Attaching files: they are saved in the vfs and not the link-table (!).
* Attached files are stored under $vfs_basedir='/infolog' in the vfs!
* 3) It manages the link-registry, in which apps can register themselfs by implementing some hooks
* 4) It notifies apps, who registered for that service, about changes in the links their entries
*/
class egw_link extends solink
{
/**
* appname used for returned attached files (!= 'filemanager'!)
*/
const VFS_APPNAME = 'file'; // pseudo-appname for own file-attachments in vfs, this is NOT the vfs-app
/**
* Baseurl for the attachments in the vfs
*/
const VFS_BASEURL = 'vfs://default/apps';
/**
* Turns on debug-messages
*/
const DEBUG = false;
/**
* other apps can participate in the linking by implementing a 'search_link' hook, which
* has to return an array in the format of an app_register entry below
*
* @var array
*/
static $app_register = array(
'felamimail' => array(
'add' => array(
'menuaction' => 'felamimail.uicompose.compose',
),
'add_popup' => '700x750',
),
);
/**
* Caches link titles for a better performance
*
* @var array
*/
private static $title_cache = array();
/**
* Private constructor to forbid instanciated use
*
*/
private function __construct()
{
}
/**
* initialize our static vars
*/
static function init_static( )
{
// other apps can participate in the linking by implementing a search_link hook, which
// has to return an array in the format of an app_register entry
// for performance reasons, we do it only once / cache it in the session
if (!($search_link_hooks = $GLOBALS['egw']->session->appsession('search_link_hooks','phpgwapi')))
{
$search_link_hooks = $GLOBALS['egw']->hooks->process('search_link');
$GLOBALS['egw']->session->appsession('search_link_hooks','phpgwapi',$search_link_hooks);
}
if (is_array($search_link_hooks))
{
foreach($search_link_hooks as $app => $data)
{
if (is_array($data))
{
self::$app_register[$app] = $data;
}
}
}
if (!(self::$title_cache = $GLOBALS['egw']->session->appsession('link_title_cache','phpgwapi')))
{
self::$title_cache = array();
}
}
/**
* Called by egw::egw_final to store the title-cache in the session
*
*/
static function save_session_cache()
{
$GLOBALS['egw']->session->appsession('link_title_cache','phpgwapi',self::$title_cache);
}
/**
* creats a link between $app1,$id1 and $app2,$id2 - $id1 does NOT need to exist yet
*
* Does NOT check if link already exists.
* File-attachments return a negative link-id !!!
*
* @param string $app1 app of $id1
* @param string/array &$id1 id of item to linkto or 0 if item not yet created or array with links
* of not created item or $file-array if $app1 == self::VFS_APPNAME (see below).
* If $id==0 it will be set on return to an array with the links for the new item.
* @param string/array $app2 app of 2.linkend or array with links ($id2 not used)
* @param string $id2='' id of 2. item of $file-array if $app2 == self::VFS_APPNAME (see below)<br>
* $file array with informations about the file in format of the etemplate file-type<br>
* $file['name'] name of the file (no directory)<br>
* $file['type'] mine-type of the file<br>
* $file['tmp_name'] name of the uploaded file (incl. directory)<br>
* $file['path'] path of the file on the client computer<br>
* $file['ip'] of the client (path and ip in $file are only needed if u want a symlink (if possible))
* @param string $remark='' Remark to be saved with the link (defaults to '')
* @param int $owner=0 Owner of the link (defaults to user)
* @param int $lastmod=0 timestamp of last modification (defaults to now=time())
* @param int $no_notify=0 &1 dont notify $app1, &2 dont notify $app2
* @return int/boolean False (for db or param-error) or on success link_id (Please not the return-value of $id1)
*/
static function link( $app1,&$id1,$app2,$id2='',$remark='',$owner=0,$lastmod=0,$no_notify=0 )
{
if (self::DEBUG)
{
echo "<p>egw_link::link('$app1',$id1,'".print_r($app2,true)."',".print_r($id2,true).",'$remark',$owner,$lastmod)</p>\n";
}
if (!$app1 || !$app2 || $app1 == $app2 && $id1 == $id2)
{
return False;
}
if (is_array($id1) || !$id1) // create link only in $id1 array
{
if (!is_array($id1))
{
$id1 = array( );
}
$link_id = self::temp_link_id($app2,$id2);
$id1[$link_id] = array(
'app' => $app2,
'id' => $id2,
'remark' => $remark,
'owner' => $owner,
'link_id' => $link_id,
'lastmod' => time()
);
if (self::DEBUG)
{
_debug_array($id1);
}
return $link_id;
}
if (is_array($app2) && !$id2)
{
reset($app2);
$link_id = True;
while ($link_id && list(,$link) = each($app2))
{
if (!is_array($link)) // check for unlink-marker
{
//echo "<b>link='$link' is no array</b><br>\n";
continue;
}
if ($link['app'] == self::VFS_APPNAME)
{
$link_id = self::attach_file($app1,$id1,$link['id'],$link['remark']);
}
else
{
$link_id = solink::link($app1,$id1,$link['app'],$link['id'],
$link['remark'],$link['owner'],$link['lastmod']);
// notify both sides
if (!($no_notify&2)) self::notify('link',$link['app'],$link['id'],$app1,$id1,$link_id);
if (!($no_notify&1)) self::notify('link',$app1,$id1,$link['app'],$link['id'],$link_id);
}
}
return $link_id;
}
if ($app1 == self::VFS_APPNAME)
{
return self::attach_file($app2,$id2,$id1,$remark);
}
elseif ($app2 == self::VFS_APPNAME)
{
return self::attach_file($app1,$id1,$id2,$remark);
}
$link_id = solink::link($app1,$id1,$app2,$id2,$remark,$owner);
if (!($no_notify&2)) self::notify('link',$app2,$id2,$app1,$id1,$link_id);
if (!($no_notify&1)) self::notify('link',$app1,$id1,$app2,$id2,$link_id);
return $link_id;
}
/**
* generate temporary link_id used as array-key
*
* @param string $app app-name
* @param mixed $id
* @return string
*/
static function temp_link_id($app,$id)
{
return $app.':'.($app != self::VFS_APPNAME ? $id : $id['name']);
}
/**
* returns array of links to $app,$id (reimplemented to deal with not yet created items)
*
* @param string $app appname
* @param string/array $id id of entry in $app or array of links if entry not yet created
* @param string $only_app if set return only links from $only_app (eg. only addressbook-entries) or NOT from if $only_app[0]=='!'
* @param string $order='link_lastmod DESC' defaults to newest links first
* @return array of links or empty array if no matching links found
*/
static function get_links( $app,$id,$only_app='',$order='link_lastmod DESC' )
{
if (self::DEBUG) echo "<p>egw_link::get_links(app='$app',id='$id',only_app='$only_app',order='$order')</p>\n";
if (is_array($id) || !$id)
{
$ids = array();
if (is_array($id))
{
if (($not_only = $only_app[0] == '!'))
{
$only_app = substr(1,$only_app);
}
foreach (array_reverse($id) as $link)
{
if (is_array($link) // check for unlink-marker
&& !($only_app && $not_only == ($link['app'] == $only_app)))
{
$ids[$link['link_id']] = $only_app ? $link['id'] : $link;
}
}
}
return $ids;
}
$ids = solink::get_links($app,$id,$only_app,$order);
if (empty($only_app) || $only_app == self::VFS_APPNAME ||
($only_app[0] == '!' && $only_app != '!'.self::VFS_APPNAME))
{
if ($vfs_ids = self::list_attached($app,$id))
{
$ids += $vfs_ids;
}
}
//echo "ids=<pre>"; print_r($ids); echo "</pre>\n";
return $ids;
}
/**
* Query the links of multiple entries of one application
*
* @ToDo also query the attachments in a single query, eg. via a directory listing of /apps/$app
* @param string $app
* @param array $ids
* @param boolean $cache_titles=true should all titles be queryed and cached (allows to query each link app only once!)
* @param string $only_app if set return only links from $only_app (eg. only addressbook-entries) or NOT from if $only_app[0]=='!'
* @param string $order='link_lastmod DESC' defaults to newest links first
* @return array of $id => array($links) pairs
*/
static function get_links_multiple($app,array $ids,$cache_titles=true,$only_app='',$order='link_lastmod DESC' )
{
if (self::DEBUG) echo "<p>".__METHOD__."('$app',".print_r($ids,true).",$cache_titles,'$only_app','$order')</p>\n";
if (!$ids)
{
return array(); // no ids are linked to nothing
}
$links = solink::get_links($app,$ids,$only_app,$order);
if (empty($only_app) || $only_app == self::VFS_APPNAME ||
($only_app[0] == '!' && $only_app != '!'.self::VFS_APPNAME))
{
// todo do that in a single query, eg. directory listing, too
foreach($ids as $id)
{
if (!isset($links[$id]))
{
$links[$id] = array();
}
if ($vfs_ids = self::list_attached($app,$id))
{
$links[$id] += $vfs_ids;
}
}
}
if ($cache_titles)
{
// agregate links by app
$app_ids = array();
foreach($links as $src_id => &$targets)
{
foreach($targets as $link)
{
$app_ids[$link['app']][] = $link['id'];
}
}
foreach($app_ids as $app => $a_ids)
{
self::titles($app,array_unique($a_ids));
}
}
return $links;
}
/**
* Read one link specified by it's link_id or by the two end-points
*
* If $id is an array (links not yet created) only link_ids are allowed.
*
* @param int/string $app_link_id > 0 link_id of link or app-name of link
* @param string/array $id='' id if $app_link_id is an appname or array with links, if 1. entry not yet created
* @param string $app2='' second app
* @param string $id2='' id in $app2
* @return array with link-data or False
*/
static function get_link($app_link_id,$id='',$app2='',$id2='')
{
if (self::DEBUG)
{
echo '<p>'.__METHOD__."($app_link_id,$id,$app2,$id2)</p>\n"; echo function_backtrace();
}
if (is_array($id))
{
if (strpos($app_link_id,':') === false) $app_link_id = self::temp_link_id($app2,$id2); // create link_id of temporary link, if not given
if (isset($id[$app_link_id]) && is_array($id[$app_link_id])) // check for unlinked-marker
{
return $id[$app_link_id];
}
return False;
}
if ((int)$app_link_id < 0 || $app_link_id == self::VFS_APPNAME || $app2 == self::VFS_APPNAME)
{
if ((int)$app_link_id < 0) // vfs link_id ?
{
return self::fileinfo2link(-$app_link_id);
}
if ($app_link_id == self::VFS_APPNAME)
{
return self::info_attached($app2,$id2,$id);
}
return self::info_attached($app_link_id,$id,$id2);
}
return solink::get_link($app_link_id,$id,$app2,$id2);
}
/**
* Remove link with $link_id or all links matching given $app,$id
*
* Note: if $link_id != '' and $id is an array: unlink removes links from that array only
* unlink has to be called with &$id to see the result (depricated) or unlink2 has to be used !!!
*
* @param $link_id link-id to remove if > 0
* @param string $app='' appname of first endpoint
* @param string/array $id='' id in $app or array with links, if 1. entry not yet created
* @param string $app2='' app of second endpoint
* @param string $id2='' id in $app2
* @return the number of links deleted
*/
static function unlink($link_id,$app='',$id='',$owner='',$app2='',$id2='')
{
return self::unlink2($link_id,$app,$id,$owner,$app2,$id2);
}
/**
* Remove link with $link_id or all links matching given $app,$id
*
* @param $link_id link-id to remove if > 0
* @param string $app='' appname of first endpoint
* @param string/array &$id='' id in $app or array with links, if 1. entry not yet created
* @param string $app2='' app of second endpoint, or !file (other !app are not yet supported!)
* @param string $id2='' id in $app2
* @return the number of links deleted
*/
static function unlink2($link_id,$app,&$id,$owner='',$app2='',$id2='')
{
if (self::DEBUG)
{
echo "<p>egw_link::unlink('$link_id','$app','$id','$owner','$app2','$id2')</p>\n";
}
if ($link_id < 0) // vfs-link?
{
return self::delete_attached(-$link_id);
}
elseif ($app == self::VFS_APPNAME)
{
return self::delete_attached($app2,$id2,$id);
}
elseif ($app2 == self::VFS_APPNAME)
{
return self::delete_attached($app,$id,$id2);
}
if (!is_array($id))
{
if (!$link_id && !$app2 && !$id2 && $app2 != '!'.self::VFS_APPNAME)
{
self::delete_attached($app,$id); // deleting all attachments
unset(self::$title_cache[$app.':'.$id]);
}
$deleted =& solink::unlink($link_id,$app,$id,$owner,$app2 != '!'.self::VFS_APPNAME ? $app2 : '',$id2);
// only notify on real links, not the one cached for writing or fileattachments
self::notify_unlink($deleted);
return count($deleted);
}
if (!$link_id) $link_id = self::temp_link_id($app2,$id2); // create link_id of temporary link, if not given
if (isset($id[$link_id]))
{
$id[$link_id] = False; // set the unlink marker
if (self::DEBUG)
{
_debug_array($id);
}
return True;
}
return False;
}
/**
* get list/array of link-aware apps the user has rights to use
*
* @param string $must_support capability the apps need to support, eg. 'add', default ''=list all apps
* @return array with app => title pairs
*/
static function app_list($must_support='')
{
$apps = array();
foreach(self::$app_register as $app => $reg)
{
if ($must_support && !isset($reg[$must_support])) continue;
if ($GLOBALS['egw_info']['user']['apps'][$app])
{
$apps[$app] = $GLOBALS['egw_info']['apps'][$app]['title'];
}
}
return $apps;
}
/**
* Searches for a $pattern in the entries of $app
*
* @param string $app app to search
* @param string $pattern pattern to search
* @return array with $id => $title pairs of matching entries of app
*/
static function query($app,$pattern)
{
if ($app == '' || !is_array($reg = self::$app_register[$app]) || !isset($reg['query']))
{
return array();
}
$method = $reg['query'];
if (self::DEBUG)
{
echo "<p>egw_link::query('$app','$pattern') => '$method'</p>\n";
}
return ExecMethod($method,$pattern);
}
/**
* returns the title (short description) of entry $id and $app
*
* @param string $app appname
* @param string $id id in $app
* @param array $link=null link-data for file-attachments
* @return string/boolean string with title, null if $id does not exist in $app or false if no perms to view it
*/
static function title($app,$id,$link=null)
{
if (!$id) return '';
if (isset(self::$title_cache[$app.':'.$id]))
{
if (self::DEBUG) echo '<p>'.__METHOD__."('$app','$id')='".self::$title_cache[$app.':'.$id]."' (from cache)</p>\n";
return self::$title_cache[$app.':'.$id];
}
if ($app == self::VFS_APPNAME)
{
if (is_array($id) && $link)
{
$link = $id;
$id = $link['name'];
}
if (is_array($link))
{
$extra = ': '.$link['type'] . ' '.egw_vfs::hsize($link['size']);
}
return self::$title_cache[$app.':'.$id] = $id.$extra;
}
if ($app == '' || !is_array($reg = self::$app_register[$app]) || !isset($reg['title']))
{
if (self::DEBUG) echo "<p>".__METHOD__."('$app','$id') something is wrong!!!</p>\n";
return array();
}
$method = $reg['title'];
$title = ExecMethod($method,$id);
if ($id && is_null($title)) // $app,$id has been deleted ==> unlink all links to it
{
self::unlink(0,$app,$id);
if (self::DEBUG) echo '<p>'.__METHOD__."('$app','$id') unlinked, as $method returned null</p>\n";
return False;
}
if (self::DEBUG) echo '<p>'.__METHOD__."('$app','$id')='$title' (from $method)</p>\n";
return self::$title_cache[$app.':'.$id] = $title;
}
/**
* Query the titles off multiple id's of one app
*
* Apps can implement that hook, if they have a quicker (eg. less DB queries) method to query the title of multiple entries.
* If it's not implemented, we call the regular title method multiple times.
*
* @param string $app
* @param array $ids
*/
static function titles($app,array $ids)
{
if (self::DEBUG)
{
echo "<p>".__METHOD__."($app,".implode(',',$ids).")</p>\n";
}
$titles = $ids_to_query = array();
foreach($ids as $id)
{
if (!isset(self::$title_cache[$app.':'.$id]))
{
if (isset(self::$app_register[$app]['titles']))
{
$ids_to_query[] = $id; // titles method --> collect links to query at once
}
else
{
self::title($app,$id); // no titles method --> fallback to query each link separate
}
}
$titles[$id] = self::$title_cache[$app.':'.$id];
}
if ($ids_to_query)
{
foreach(ExecMethod(self::$app_register[$app]['titles'],$ids_to_query) as $id => $title)
{
$titles[$id] = self::$title_cache[$app.':'.$id] = $title;
}
}
return $titles;
}
/**
* Add new entry to $app, evtl. already linked to $to_app, $to_id
*
* @param string $app appname of entry to create
* @param string $to_app appname to link the new entry to
* @param string $to_id id in $to_app
* @return array/boolean with name-value pairs for link to add-methode of $app or false if add not supported
*/
static function add($app,$to_app='',$to_id='')
{
//echo "<p>egw_link::add('$app','$to_app','$to_id') app_register[$app] ="; _debug_array($app_register[$app]);
if ($app == '' || !is_array($reg = self::$app_register[$app]) || !isset($reg['add']))
{
return false;
}
$params = $reg['add'];
if ($reg['add_app'] && $to_app && $reg['add_id'] && $to_id)
{
$params[$reg['add_app']] = $to_app;
$params[$reg['add_id']] = $to_id;
}
return $params;
}
/**
* view entry $id of $app
*
* @param string $app appname
* @param string $id id in $app
* @param array $link=null link-data for file-attachments
* @return array with name-value pairs for link to view-methode of $app to view $id
*/
static function view($app,$id,$link=null)
{
if ($app == self::VFS_APPNAME && !empty($id) && is_array($link))
{
return egw_vfs::download_url(parse_url(self::vfs_path($link['app2'],$link['id2'],$link['id']),PHP_URL_PATH));
}
if ($app == '' || !is_array($reg = self::$app_register[$app]) || !isset($reg['view']) || !isset($reg['view_id']))
{
return array();
}
$view = $reg['view'];
$names = explode(':',$reg['view_id']);
if (count($names) > 1)
{
$id = explode(':',$id);
while (list($n,$name) = each($names))
{
$view[$name] = $id[$n];
}
}
else
{
$view[$reg['view_id']] = $id;
}
return $view;
}
/**
* Check if $app uses a popup for $action
*
* @param string $app app-name
* @param string $action='view' name of the action, atm. 'view' or 'add'
* @return boolean/string false if no popup is used or $app is not registered, otherwise string with the prefered popup size (eg. '640x400)
*/
static function is_popup($app,$action='view')
{
return self::get_registry($app,$action.'_popup');
}
/**
* Check if $app is in the registry and has an entry for $name
*
* @param string $app app-name
* @param string $name name / key in the registry, eg. 'view'
* @return boolean/string false if $app is not registered, otherwise string with the value for $name
*/
static function get_registry($app,$name)
{
$reg = self::$app_register[$app];
return isset($reg) ? $reg[$name] : false;
}
/**
* path to the attached files of $app/$ip or the directory for $app if no $id,$file given
*
* All link-files are based in the vfs-subdir '/apps/'.$app
*
* @param string $app appname
* @param string $id='' id in $app
* @param string $file='' filename
* @param boolean $just_the_path=false return url or just the vfs path
* @return string/array path or array with path and relatives, depending on $relatives
*/
static function vfs_path($app,$id='',$file='',$just_the_path=false)
{
$path = self::VFS_BASEURL;
if ($app)
{
$path .= '/'.$app;
if ($id)
{
$path .= '/'.$id;
if ($file)
{
$path .= '/'.$file;
}
}
}
if ($just_the_path)
{
$path = parse_url($path,PHP_URL_PATH);
}
else
{
$path = egw_vfs::resolve_url($path);
}
//error_log(__METHOD__."($app,$id,$file)=$path");
return $path;
}
/**
* Put a file to the corrosponding place in the VFS and set the attributes
*
* @param string $app appname to linke the file to
* @param string $id id in $app
* @param array $file informations about the file in format of the etemplate file-type
* $file['name'] name of the file (no directory)
* $file['type'] mine-type of the file
* $file['tmp_name'] name of the uploaded file (incl. directory)
* $file['path'] path of the file on the client computer
* $file['ip'] of the client (path and ip are only needed if u want a symlink (if possible))
* @param string $comment='' comment to add to the link
* @return int negative id of egw_sqlfs table as negative link-id's are for vfs attachments
*/
static function attach_file($app,$id,$file,$comment='')
{
$entry_dir = self::vfs_path($app,$id);
if (self::DEBUG)
{
echo "<p>attach_file: app='$app', id='$id', tmp_name='$file[tmp_name]', name='$file[name]', size='$file[size]', type='$file[type]', path='$file[path]', ip='$file[ip]', comment='$comment', entry_dir='$entry_dir'</p>\n";
}
if (file_exists($entry_dir) || ($Ok = mkdir($entry_dir,0,true)))
{
if (($Ok = copy($file['tmp_name'],$fname = egw_vfs::concat($entry_dir,$file['name'])) &&
($stat = links_stream_wrapper::url_stat($fname,0))) && $comment)
{
egw_vfs::proppatch(parse_url($fname,PHP_URL_PATH),array(array('name'=>'comment','val'=>$comment))); // set comment
}
}
else
{
error_log(__METHOD__."($app,$id,$file,$comment) Can't mkdir $entry_dir!");
}
return $Ok ? -$stat['ino'] : false;
}
/**
* deletes a single or all attached files of an entry (for all there's no acl check, as the entry probably not exists any more!)
*
* @param int/string $app > 0: file_id of an attchemnt or $app/$id entry which linked to
* @param string $id='' id in app
* @param string $fname='' filename
* @return boolean/array false on error ($app or $id not found), array with path as key and boolean result of delete
*/
static function delete_attached($app,$id='',$fname='')
{
if ((int)$app > 0) // is file_id
{
$url = links_stream_wrapper::PREFIX.links_stream_wrapper::id2path($app);
}
else
{
if (empty($app) || empty($id))
{
return False; // dont delete more than all attachments of an entry
}
$url = self::vfs_path($app,$id,$fname);
if (!$fname || !$id) // we delete the whole entry (or all entries), which probably not exist anymore
{
$current_is_root = egw_vfs::$is_root;
egw_vfs::$is_root = true;
}
}
if (self::DEBUG)
{
echo "<p>egw_link::delete_attached('$app','$id','$fname') url=$url</p>\n";
}
if (($Ok = egw_vfs::remove($url,true)) && ((int)$app > 0 || $fname))
{
// try removing the dir, in case it's empty
@rmdir(egw_vfs::dirname($url));
}
if (!is_null($current_is_root))
{
egw_vfs::$is_root = $current_is_root;
}
return $Ok;
}
/**
* converts the infos vfs has about a file into a link
*
* @param string $app appname
* @param string $id id in app
* @param string $filename filename
* @return array 'kind' of link-array
*/
static function info_attached($app,$id,$filename)
{
$url = self::vfs_path($app,$id,$filename);
if (!($stat = links_stream_wrapper::url_stat($url,STREAM_URL_STAT_QUIET)))
{
return false;
}
return self::fileinfo2link($stat,$url);
}
/**
* converts a fileinfo (row in the vfs-db-table) in a link
*
* @param array/int $fileinfo a row from the vfs-db-table (eg. returned by the vfs ls static function) or a file_id of that table
* @return array a 'kind' of link-array
*/
static function fileinfo2link($fileinfo,$url=null)
{
if (!is_array($fileinfo))
{
$url = links_stream_wrapper::id2path($fileinfo);
if (!($fileinfo = links_stream_wrapper::url_stat($url,STREAM_URL_STAT_QUIET)))
{
return false;
}
}
list(,,,,$app,$id) = explode('/',$url); // links://apps/$app/$id
return array(
'app' => self::VFS_APPNAME,
'id' => $fileinfo['name'],
'app2' => $app,
'id2' => $id,
'remark' => '', // only list_attached currently sets the remark
'owner' => $fileinfo['uid'],
'link_id' => -$fileinfo['ino'],
'lastmod' => $fileinfo['mtime'],
'size' => $fileinfo['size'],
'type' => $fileinfo['mime'],
);
}
/**
* lists all attachments to $app/$id
*
* @param string $app appname
* @param string $id id in app
* @return array with link_id => 'kind' of link-array pairs
*/
static function list_attached($app,$id)
{
$url = self::vfs_path($app,$id);
//error_log(__METHOD__."($app,$id) url=$url");
if (!($extra = self::get_registry($app,'find_extra'))) $extra = array();
$attached = array();
if (($url2stats = egw_vfs::find($url,array('url'=>true,'need_mime'=>true,'type'=>'f')+$extra,true)))
{
$props = egw_vfs::propfind(array_keys($url2stats)); // get the comments
foreach($url2stats as $url => &$fileinfo)
{
$link = self::fileinfo2link($fileinfo,$url);
if (isset($props[$path = parse_url($url,PHP_URL_PATH)]))
{
foreach($props[$path] as $prop)
{
if ($prop['ns'] == egw_vfs::DEFAULT_PROP_NAMESPACE && $prop['name'] == 'comment')
{
$link['remark'] = $prop['val'];
break;
}
}
}
$attached[$link['link_id']] = $link;
$urls[] = $url;
}
}
return $attached;
}
/**
* reverse static function of htmlspecialchars()
*
* @param string $str string to decode
* @return string decoded string
*/
static private function decode_htmlspecialchars($str)
{
return str_replace(array('&amp;','&quot;','&lt;','&gt;'),array('&','"','<','>'),$str);
}
/**
* notify other apps about changed content in $app,$id
*
* @param string $app name of app in which the updated happend
* @param string $id id in $app of the updated entry
* @param array $data=null updated data of changed entry, as the read-method of the BO-layer would supply it
*/
static function notify_update($app,$id,$data=null)
{
foreach(self::get_links($app,$id,'!'.self::VFS_APPNAME) as $link_id => $link)
{
self::notify('update',$link['app'],$link['id'],$app,$id,$link_id,$data);
}
unset(self::$title_cache[$app.':'.$id]);
}
/**
* notify an application about a new or deleted links to own entries or updates in the content of the linked entry
*
* Please note: not all apps supply update notifications
*
* @internal
* @param string $type 'link' for new links, 'unlink' for unlinked entries, 'update' of content in linked entries
* @param string $notify_app app to notify
* @param string $notify_id id in $notify_app
* @param string $target_app name of app whos entry changed, linked or deleted
* @param string $target_id id in $target_app
* @param array $data=null data of entry in app2 (optional)
*/
static private function notify($type,$notify_app,$notify_id,$target_app,$target_id,$link_id,$data=null)
{
if ($link_id && isset(self::$app_register[$notify_app]) && isset(self::$app_register[$notify_app]['notify']))
{
ExecMethod(self::$app_register[$notify_app]['notify'],array(
'type' => $type,
'id' => $notify_id,
'target_app' => $target_app,
'target_id' => $target_id,
'link_id' => $link_id,
'data' => $data,
));
}
}
/**
* notifies about unlinked links
*
* @internal
* @param array &$links unlinked links from the database
*/
static private function notify_unlink(&$links)
{
foreach($links as $link)
{
// we notify both sides of the link, as the unlink command NOT clearly knows which side initiated the unlink
self::notify('unlink',$link['link_app1'],$link['link_id1'],$link['link_app2'],$link['link_id2'],$link['link_id']);
self::notify('unlink',$link['link_app2'],$link['link_id2'],$link['link_app1'],$link['link_id1'],$link['link_id']);
}
}
}
egw_link::init_static();
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