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egroupware/phpgwapi/inc/class.vfs_sharing.inc.php

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<?php
/***************************************************************************\
* eGroupWare - File Manager *
* http://www.egroupware.org *
* Written by: *
* - Vinicius Cubas Brand <viniciuscb@users.sourceforge.net> *
* sponsored by Thyamad - http://www.thyamad.com *
* ------------------------------------------------------------------------- *
* Description: File Sharing class handler for VFS (SQL implementation v2) *
* ------------------------------------------------------------------------- *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
\***************************************************************************/
// This class had to be created because file sharing work very differently
// In fm2 than in fm.
#FIXME this class is completely vfs_sql2 oriented. Must exist implementation
# to other types
class vfs_sharing
{
var $accounts;
var $db;
/*!
* function vfs_sharing
* @description Class constructor
*/
function vfs_sharing()
{
$this->accounts =& $GLOBALS['phpgw']->accounts;
$this->db = clone($GLOBALS['phpgw']->db);
}
/*!
* function set_permissions
* @description Add specified permissions that do not exist, remove
* unspecified permissions that exist. Easier to call than
* add_permissions and then remove_permissions
* @param array $data in the following format:
* array(
* file_id => array(
* account_id => acl_rights,
* account_id2 => acl_rights2,...
* ),
* file_id2 ... );
*/
function set_permissions($data)
{
//TODO see if a user have permissions in a file. Only if he have
//(or if is inside his homedir) he can change permissions
if (!$data || !is_array($data))
{
return false;
}
//search for permissions on files, to know which ones must be
//updated/inserted
reset($data);
while(list($file_id,$account_ids) = each($data))
{
$file_ids[] = $file_id;
}
$sql = 'SELECT * from phpgw_vfs2_shares
WHERE file_id IN ('.implode(',',$file_ids).')';
$this->db->query($sql,__LINE__,__FILE__);
while ($this->db->next_record())
{
$current_shares[$this->db->Record['file_id']][$this->db->Record['account_id']] = $this->db->Record['acl_rights'];
}
//now that we have the current permissions, must know which ones to
//insert/update and which ones to delete
reset($data);
while(list($file_id,$account_ids) = each($data))
{
reset($account_ids);
while(list($account_id,$acl_rights) = each($account_ids))
{
//exists
if (array_key_exists($account_id,$current_shares[$file_id]))
{
if ($current_shares[$file_id][$account_id] != $acl_rights)
{
$insert[$file_id][$account_id] = $acl_rights;
}
unset($current_shares[$file_id][$account_id]);
}
else
{
$insert[$file_id][$account_id] = $acl_rights;
}
}
}
//get which ones to delete
reset($current_shares);
while(list($file_id,$account_ids) = each($current_shares))
{
if (is_array($account_ids))
{
reset($account_ids);
while(list($account_id,$acl_rights) = each($account_ids))
{
$delete[$file_id][$account_id] = $acl_rights;
}
}
}
foreach($insert as $file_id => $account_ids)
{
$this->store_permissions($file_id,$account_ids);
}
foreach($delete as $file_id => $account_ids)
{
$this->remove_permissions($file_id,$account_ids);
}
return true;
}
/*!
* function store_qpermissions
* @description Add/update new permissions to a file id
* @param account_ids: array('account_id'=> acl_rights,acc_id2=>acl_r2,)
*/
function store_permissions($file_id,$account_ids)
{
if (!is_array($account_ids) || !is_numeric($file_id))
{
return false;
}
foreach($account_ids as $account_id => $acl_rights)
{
$this->db->insert('phpgw_vfs2_shares',
array('acl_rights'=>$acl_rights),
array('account_id'=>$account_id,'file_id'=>$file_id),
__LINE__,__FILE__);
}
return true;
}
/*!
* function remove_permissions
* @description Remove some permissions of a file id
*/
function remove_permissions($file_id,$account_ids)
{
if (!is_array($account_ids) || !is_numeric($file_id))
{
return false;
}
//gets an array will all accounts as key
$accounts = array_keys($account_ids);
$this->db->delete('phpgw_vfs2_shares',
array('account_id'=>$accounts,'file_id'=>$file_id),
__LINE__,__FILE__);
return true;
}
/**
* Function: remove_all_permissions
*
* Removes all permissions of a file
*/
function remove_all_permissions($file_id)
{
$this->db->delete('phpgw_vfs2_shares',
array('file_id'=>$file_id),
__LINE__,__FILE__);
}
/*!
* function get_permissions
* @description This function will get the permissions set for a given
* file, makeing a simple query in the file repository. Does not
* search for permissions in parent dirs. If you want to know which
* is the permission for a user in a given file TAKING IN COUNT the
* parent dirs, use $this->get_file_permissions instead.
* @param int file_id The id of the file
* @result array with account_id as index, acl_rights as value
* @author Vinicius Cubas Brand
*/
function get_permissions($file_id)
{
$this->db->select('phpgw_vfs2_shares','acl_rights,account_id',
array('file_id'=>$file_id),__LINE__,__FILE__);
$result = array();
while ($this->db->next_record())
{
$result[$this->db->Record['account_id']] = $this->db->Record['acl_rights'];
}
return ($result);
}
/*!
* function get_shares
* @description Get all shares in which the user have $permission
* @param $account_id The id of the user that can read the shared folder
* @param $is_owner If true, will get only the shared folders that
* $account_id owns. Useful to get the shares that account_id owns
* and have configured himself (true), or instead the shares of the
* others that he have $permission (false)
* @result array with the list of the file_id's of all shares
*/
function get_shares($account_id,$is_owner=false,$permission=PHPGW_ACL_READ,$exclude_dir='')
{
$default_values = array(
'is_owner' => false,
'permission' => PHPGW_ACL_READ
);
if (is_array($account_id))
{
$account_id = array_merge($default_values,$account_id);
$is_owner = $account_id['is_owner'];
$permission = $account_id['permission'];
$exclude_dir = $account_id['exclude_dir'];
$only_dir = $account_id['only_dir'];
$account_id = $account_id['account_id'];
}
if ($exclude_dir)
{
if (is_array($exclude_dir))
{
foreach ($exclude_dir as $dir)
{
$append .= " AND fls.directory NOT LIKE '".$dir."%' ";
}
}
else
{
$append .= " AND fls.directory NOT LIKE '".$exclude_dir."%' ";
}
}
elseif ($only_dir)
{
$append .= " AND fls.directory LIKE '".$only_dir."%' ";
}
if ($is_owner)
{
$sql = "SELECT DISTINCT sh.file_id as file_id,
sh.acl_rights as acl_rights,
fls.directory as directory,
fls.name as name,
fls.owner_id as owner_id
FROM phpgw_vfs2_shares as sh,
phpgw_vfs2_files as fls
INNER JOIN phpgw_vfs2_mimetypes mime on fls.mime_id = mime.mime_id
WHERE sh.file_id = fls.file_id
AND mime.mime = 'Directory'
AND fls.shared = 'Y'
$append
AND fls.owner_id = $account_id";
}
else
{
//gets the id of all groups $account_id belongs to
$groups = $GLOBALS['phpgw']->accounts->membership($account_id);
foreach($groups as $group)
{
$accounts[] = $group['account_id'];
}
$accounts[] = $account_id;
$sql = "SELECT DISTINCT sh.file_id as file_id,
sh.acl_rights as acl_rights,
fls.directory as directory,
fls.name as name,
fls.owner_id as owner_id
FROM phpgw_vfs2_shares as sh,
phpgw_vfs2_files as fls
INNER JOIN phpgw_vfs2_mimetypes mime on fls.mime_id = mime.mime_id
WHERE sh.file_id = fls.file_id
AND mime.mime = 'Directory'
AND sh.account_id IN (".implode(',',$accounts).")
AND fls.shared = 'Y'
$append
AND fls.owner_id != $account_id";
}
$this->db->query($sql,__LINE__,__FILE__);
$res = array();
while($this->db->next_record())
{
if($this->db->Record['acl_rights'] & $permission)
{
$res[] = $this->db->Record;
}
}
//should be returned the array with complete file description
return $res;
}
/*!
* function search_shares
* @description Search for a shared folder which the user have
* $permission and have $keyword related (in directory or filename)
* @result array with the list of all shares
*/
//TODO search by file owner's name
function search_shares($account_id,$keyword,$permission=PHPGW_ACL_READ)
{
if ($account_id != ((int)$account_id))
{
return false;
}
//gets the id of all groups $account_id belongs to
$groups = $GLOBALS['phpgw']->accounts->membership($account_id);
foreach($groups as $group)
{
$accounts[] = $group['account_id'];
}
$accounts[] = $account_id;
$sql = "SELECT DISTINCT sh.file_id as file_id,
sh.acl_rights as acl_rights,
fls.directory as directory,
fls.name as name,
fls.owner_id as owner_id
FROM phpgw_vfs2_shares as sh,
phpgw_vfs2_files as fls
WHERE sh.file_id = fls.file_id
AND sh.account_id IN (".implode(',',$accounts).")
AND ( fls.directory LIKE '%$keyword%'
OR fls.name LIKE '%$keyword%')
AND fls.shared = 'Y'
AND fls.owner_id != $account_id";
$this->db->query($sql,__LINE__,__FILE__);
while($this->db->next_record())
{
if ($this->db->Record['acl_rights'] & $permission)
{
$res[] = $this->db->Record;
}
}
return $res;
}
/**
* Function: get_file_permissions
*
* Gets the permissions for a user in a given file For files in a
* shared dir, will get the acl rights of the parent dir, and if
* not specified, of the parent of the parent, and so on. NOTE:
* this consider that files CANNOT have permissions set, only
* their parent dir, and the file inherits the nearer parent with
* permissions defined (even if these permissions are NONE)
*
* @result int some mask of various PHPGW_ACL_*
*/
function get_file_permissions($account_id,$file_id)
{
//get directory/file names
$this->db->select('phpgw_vfs2_files','directory,name',
array('file_id' => $file_id),__LINE__,__FILE__);
$this->db->next_record();
$directory = $this->db->Record['directory'];
$name = $this->db->Record['name'];
$fullname = $directory.'/'.$name;
$parent_dirs = array();
$dirs_expl = explode('/',$fullname);
//put all parents hierarchy in an array
$parent_dirs_array[]=$fullname;
while(1)
{
array_pop($dirs_expl);
if($dirs_expl[1])
{
$parent_dirs_array[]=implode('/',$dirs_expl);
}
else
{
$parent_dirs_array[]='/';
break;
}
}
//gets the id of all groups $account_id belongs to
$groups = $GLOBALS['phpgw']->accounts->membership($account_id);
foreach($groups as $group)
{
$accounts[] = $group['account_id'];
}
$accounts[] = $account_id;
$accounts[] = 0; //default permission for all users
$accounts = implode(',',$accounts);
//searches for information in the parent dirs
for($i=0; $i<count($parent_dirs_array);$i++)
{
$dir_name = array_pop(explode('/',$parent_dirs_array[$i]));
if ($dir_name)
{
//if file have a reg in table, will try to see if it is
//with permissions to the current user
$sql = "SELECT sh.acl_rights as acl_rights,
fls.directory as directory,
fls.name as name,
fls.owner_id as owner_id,
fls.shared as shared
FROM phpgw_vfs2_files as fls,
phpgw_vfs2_shares as sh
WHERE fls.file_id = sh.file_id
AND fls.directory = '".$parent_dirs_array[$i+1]."'
AND fls.name = '".$dir_name."'
AND fls.shared = 'Y'";
$this->db->query($sql,__LINE__,__FILE__);
if ($this->db->next_record())
{
$sql = "SELECT sh.acl_rights as acl_rights,
fls.directory as directory,
fls.name as name,
fls.owner_id as owner_id,
fls.shared as shared
FROM phpgw_vfs2_files as fls,
phpgw_vfs2_shares as sh
WHERE (sh.account_id IN ($accounts)
OR fls.owner_id = $account_id)
AND fls.file_id = sh.file_id
AND fls.directory = '".$parent_dirs_array[$i+1]."'
AND fls.name = '".$dir_name."'
AND fls.shared = 'Y'";
$this->db->query($sql,__LINE__,__FILE__);
/*
$this->db->select('phpgw_vfs2_files','file_id',
array('directory'=>$parent_dirs_array[$i+1],
'name'=>$dir_name), __LINE__,__FILE__);
$this->db->next_record();
$this->db->select('phpgw_vfs2_shares','acl_rights',
array('file_id'=>$this->db->Record['file_id'],
'account_id'=>$account_id),__LINE__,__FILE__);*/
// echo "tested file: ".$dir_name." \n<br>";
// echo $sql."<br><br>\n\n";
while ($this->db->next_record())
{
// echo "results for file: ".$dir_name." \n<br>";
if ($this->db->Record['owner_id'] == $account_id)
{
//the user can do anything with any dir or file
//inside a dir that belongs to him.
return PHPGW_ACL_READ|PHPGW_ACL_EDIT|PHPGW_ACL_ADD;
}
else
{
$entered = true;
$result |= $this->db->Record['acl_rights'];
}
}
if($entered)
{
return $result;
}
else
{
return 0;
}
}
}
}
return false;
}
}
?>
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