318 lines
12 KiB
PHP
318 lines
12 KiB
PHP
<?php
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Michael Gapczynski
|
|
* @copyright 2011 Michael Gapczynski GapczynskiM@gmail.com
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
|
|
* License as published by the Free Software Foundation; either
|
|
* version 3 of the License, or any later version.
|
|
*
|
|
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
OC_Hook::connect("OC_FILESYSTEM","post_delete", "OC_Share", "deleteItem");
|
|
OC_Hook::connect("OC_FILESYSTEM","post_rename", "OC_Share", "renameItem");
|
|
|
|
/**
|
|
* This class manages shared items within the database.
|
|
*/
|
|
class OC_Share {
|
|
|
|
const WRITE = 1;
|
|
const DELETE = 2;
|
|
|
|
/**
|
|
* TODO notify user a file is being shared with them?
|
|
* Share an item, adds an entry into the database
|
|
* @param string $item
|
|
* @param user item shared with $uid_shared_with
|
|
*/
|
|
public function __construct($source, $uid_shared_with, $permissions, $public = false) {
|
|
if ($source && OC_FILESYSTEM::file_exists($source) && OC_FILESYSTEM::is_readable($source)) {
|
|
$source = "/".OC_User::getUser()."/files".$source;
|
|
$uid_owner = OC_User::getUser();
|
|
if ($public) {
|
|
// TODO create token for public file
|
|
$token = sha1("$uid_owner-$item");
|
|
} else {
|
|
$query = OC_DB::prepare("INSERT INTO *PREFIX*sharing VALUES(?,?,?,?,?)");
|
|
$target = "/".$uid_shared_with."/files/Share/".basename($source);
|
|
$check = OC_DB::prepare("SELECT target FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with = ?");
|
|
$result = $check->execute(array($target, $uid_shared_with))->fetchAll();
|
|
// Check if target already exists for the user, if it does append a number to the name
|
|
if (count($result) > 0) {
|
|
if ($pos = strrpos($target, ".")) {
|
|
$name = substr($target, 0, $pos);
|
|
$ext = substr($target, $pos);
|
|
} else {
|
|
$name = $target;
|
|
$ext = "";
|
|
}
|
|
$counter = 1;
|
|
while (count($result) > 0) {
|
|
$newTarget = $name."_".$counter.$ext;
|
|
$result = $check->execute(array($newTarget, $uid_shared_with))->fetchAll();
|
|
$counter++;
|
|
}
|
|
$target = $newTarget;
|
|
}
|
|
$query->execute(array($uid_owner, $uid_shared_with, $source, $target, $permissions));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove any duplicate or trailing '/' from the path
|
|
* @return A clean path
|
|
*/
|
|
private static function cleanPath($path) {
|
|
$path = rtrim($path, "/");
|
|
return preg_replace('{(/)\1+}', "/", $path);
|
|
}
|
|
|
|
/**
|
|
* Get the user and the user's groups and put them into an array
|
|
* @return An array to be used by the IN operator in a query for uid_shared_with
|
|
*/
|
|
private static function getUserAndGroups() {
|
|
$self = OC_User::getUser();
|
|
$groups = OC_Group::getUserGroups($self);
|
|
array_unshift($groups, $self);
|
|
return $groups;
|
|
}
|
|
|
|
/**
|
|
* Create a new entry in the database for a file inside a shared folder
|
|
*
|
|
* $oldTarget and $newTarget may be the same value. $oldTarget exists in case the file is being moved outside of the folder
|
|
*
|
|
* @param $oldTarget The current target location
|
|
* @param $newTarget The new target location
|
|
*/
|
|
public static function pullOutOfFolder($oldTarget, $newTarget) {
|
|
$folders = self::getParentFolders($oldTarget);
|
|
$source = $folders['source'].substr($oldTarget, strlen($folders['target']));
|
|
$item = self::getItem($folders['target']);
|
|
$query = OC_DB::prepare("INSERT INTO *PREFIX*sharing VALUES(?,?,?,?,?)");
|
|
$query->execute(array($item[0]['uid_owner'], OC_User::getUser(), $source, $newTarget, $item[0]['permissions']));
|
|
}
|
|
|
|
/**
|
|
* Get the item with the specified target location
|
|
* @param $target The target location of the item
|
|
* @return An array with the item
|
|
*/
|
|
public static function getItem($target) {
|
|
$target = self::cleanPath($target);
|
|
$query = OC_DB::prepare("SELECT uid_owner, source, permissions FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with = ? LIMIT 1");
|
|
return $query->execute(array($target, OC_User::getUser()))->fetchAll();
|
|
}
|
|
|
|
/**
|
|
* Get all items the current user is sharing
|
|
* @return An array with all items the user is sharing
|
|
*/
|
|
public static function getMySharedItems() {
|
|
$query = OC_DB::prepare("SELECT uid_shared_with, source, permissions FROM *PREFIX*sharing WHERE uid_owner = ?");
|
|
return $query->execute(array(OC_User::getUser()))->fetchAll();
|
|
}
|
|
|
|
/**
|
|
* Get the items within a shared folder that have their own entry for the purpose of name, location, or permissions that differ from the folder itself
|
|
*
|
|
* Works for both target and source folders. Can be used for getting all items shared with you e.g. pass '/MTGap/files'
|
|
*
|
|
* @param $folder The folder of the items to look for
|
|
* @return An array with all items in the database that are in the folder
|
|
*/
|
|
public static function getItemsInFolder($folder) {
|
|
$folder = self::cleanPath($folder);
|
|
// Append '/' in order to filter out the folder itself if not already there
|
|
if (substr($folder, -1) !== "/") {
|
|
$folder .= "/";
|
|
}
|
|
$length = strlen($folder);
|
|
$userAndGroups = self::getUserAndGroups();
|
|
$query = OC_DB::prepare("SELECT uid_owner, source, target FROM *PREFIX*sharing WHERE SUBSTR(source, 1, ?) = ? OR SUBSTR(target, 1, ?) = ? AND uid_shared_with IN(".substr(str_repeat(",?", count($userAndGroups)), 1).")");
|
|
return $query->execute(array_merge(array($length, $folder, $length, $folder), $userAndGroups))->fetchAll();
|
|
}
|
|
|
|
/**
|
|
* Get the source and target parent folders of the specified target location
|
|
* @param $target The target location of the item
|
|
* @return An array with the keys 'source' and 'target' with the values of the source and target parent folders
|
|
*/
|
|
public static function getParentFolders($target) {
|
|
$target = self::cleanPath($target);
|
|
$userAndGroups = self::getUserAndGroups();
|
|
$query = OC_DB::prepare("SELECT source FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with IN(".substr(str_repeat(",?", count($userAndGroups)), 1).") LIMIT 1");
|
|
// Prevent searching for user directory e.g. '/MTGap/files'
|
|
$userDirectory = substr($target, 0, strpos($target, "files") + 5);
|
|
while ($target != "" && $target != "/" && $target != "." && $target != $userDirectory) {
|
|
// Check if the parent directory of this target location is shared
|
|
$target = dirname($target);
|
|
$result = $query->execute(array_merge(array($target), $userAndGroups))->fetchAll();
|
|
if (count($result) > 0) {
|
|
break;
|
|
}
|
|
}
|
|
if (count($result) > 0) {
|
|
// Return both the source folder and the target folder
|
|
return array("source" => $result[0]['source'], "target" => $target);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the source location of the item at the specified target location
|
|
* @param $target The target location of the item
|
|
* @return Source location or false if target location is not valid
|
|
*/
|
|
public static function getSource($target) {
|
|
$target = self::cleanPath($target);
|
|
$userAndGroups = self::getUserAndGroups();
|
|
$query = OC_DB::prepare("SELECT source FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with IN(".substr(str_repeat(",?", count($userAndGroups)), 1).") LIMIT 1");
|
|
$result = $query->execute(array_merge(array($target), $userAndGroups))->fetchAll();
|
|
if (count($result) > 0) {
|
|
return $result[0]['source'];
|
|
} else {
|
|
$folders = self::getParentFolders($target);
|
|
if ($folders == true) {
|
|
return $folders['source'].substr($target, strlen($folders['target']));
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the user's permissions for the item at the specified target location
|
|
* @param $target The target location of the item
|
|
* @return The permissions, use bitwise operators to check against the constants WRITE and DELETE
|
|
*/
|
|
public static function getPermissions($target) {
|
|
$target = self::cleanPath($target);
|
|
$userAndGroups = self::getUserAndGroups();
|
|
$query = OC_DB::prepare("SELECT permissions FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with IN(".substr(str_repeat(",?", count($userAndGroups)), 1).") LIMIT 1");
|
|
$result = $query->execute(array_merge(array($target), $userAndGroups))->fetchAll();
|
|
if (count($result) > 0) {
|
|
return $result[0]['permissions'];
|
|
} else {
|
|
$folders =self::getParentFolders($target);
|
|
if ($folders == true) {
|
|
$result = $query->execute(array_merge(array($folders), $userAndGroups))->fetchAll();
|
|
if (count($result) > 0) {
|
|
return $result[0]['permissions'];
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the source location to a new value
|
|
* @param $oldSource The current source location
|
|
* @param $newTarget The new source location
|
|
*/
|
|
public static function setSource($oldSource, $newSource) {
|
|
$oldSource = self::cleanPath($oldSource);
|
|
$newSource = self::cleanPath($newSource);
|
|
$query = OC_DB::prepare("UPDATE *PREFIX*sharing SET source = REPLACE(source, ?, ?) WHERE uid_owner = ?");
|
|
$query->execute(array($oldSource, $newSource, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Set the target location to a new value
|
|
*
|
|
* You must use the pullOutOfFolder() function to change the target location of a file inside a shared folder if the target location differs from the folder
|
|
*
|
|
* @param $oldTarget The current target location
|
|
* @param $newTarget The new target location
|
|
*/
|
|
public static function setTarget($oldTarget, $newTarget) {
|
|
$oldTarget = self::cleanPath($oldTarget);
|
|
$newTarget = self::cleanPath($newTarget);
|
|
$query = OC_DB::prepare("UPDATE *PREFIX*sharing SET target = REPLACE(target, ?, ?) WHERE uid_shared_with = ?");
|
|
$query->execute(array($oldTarget, $newTarget, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Change the permissions for the specified item and user
|
|
*
|
|
* You must construct a new shared item to change the permissions of a file inside a shared folder if the permissions differ from the folder
|
|
*
|
|
* @param $source The source location of the item
|
|
* @param $uid_shared_with The user to change the permissions for
|
|
* @param $permissions The permissions, use the constants WRITE and DELETE
|
|
*/
|
|
public static function setPermissions($source, $uid_shared_with, $permissions) {
|
|
$source = self::cleanPath($source);
|
|
$query = OC_DB::prepare("UPDATE *PREFIX*sharing SET permissions = ? WHERE SUBSTR(source, 1, ?) = ? AND uid_shared_with = ? AND uid_owner = ?");
|
|
$query->execute(array($permissions, strlen($source), $source, $uid_shared_with, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Unshare the item, removes it from all specified users
|
|
*
|
|
* You must use the pullOutOfFolder() function to unshare a file inside a shared folder and set $newTarget to nothing
|
|
*
|
|
* @param $source The source location of the item
|
|
* @param $uid_shared_with Array of users to unshare the item from
|
|
*/
|
|
public static function unshare($source, $uid_shared_with) {
|
|
$source = self::cleanPath($source);
|
|
$query = OC_DB::prepare("DELETE FROM *PREFIX*sharing WHERE SUBSTR(source, 1, ?) = ? AND uid_shared_with = ? AND uid_owner = ?");
|
|
$query->execute(array(strlen($source), $source, $uid_shared_with, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Unshare the item from the current user, removes it only from the database and doesn't touch the source file
|
|
*
|
|
* You must use the pullOutOfFolder() function to unshare a file inside a shared folder and set $newTarget to nothing
|
|
*
|
|
* @param $target The target location of the item
|
|
*/
|
|
public static function unshareFromMySelf($target) {
|
|
$target = self::cleanPath($target);
|
|
$query = OC_DB::prepare("DELETE FROM *PREFIX*sharing WHERE SUBSTR(target, 1, ?) = ? AND uid_shared_with = ?");
|
|
$query->execute(array(strlen($target), $target, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Remove the item from the database, the owner deleted the file
|
|
* @param $arguments Array of arguments passed from OC_HOOK
|
|
*/
|
|
public static function deleteItem($arguments) {
|
|
$source = "/".OC_User::getUser()."/files".$arguments['path'];
|
|
$source = self::cleanPath($source);
|
|
$query = OC_DB::prepare("DELETE FROM *PREFIX*sharing WHERE SUBSTR(source, 1, ?) = ? AND uid_owner = ?");
|
|
$query->execute(array(strlen($source), $source, OC_User::getUser()));
|
|
}
|
|
|
|
/**
|
|
* Rename the item in the database, the owner renamed the file
|
|
* @param $arguments Array of arguments passed from OC_HOOK
|
|
*/
|
|
public static function renameItem($arguments) {
|
|
$oldSource = "/".OC_User::getUser()."/files".$arguments['oldpath'];
|
|
$oldSource = self::cleanPath($oldSource);
|
|
$newSource = "/".OC_User::getUser()."/files".$arguments['newpath'];
|
|
$newSource = self::cleanPath($newSource);
|
|
self::setSource($oldSource, $newSource);
|
|
}
|
|
|
|
}
|
|
|
|
?>
|