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<?php
namespace App\Helpers;
use App\Core\Database;
use App\Helpers\AuthHelper;
use App\Helpers\CoreHelper;
use App\Helpers\FileFolderHelper;
use App\Models\FileFolderShare;
use App\Models\FileFolderShareItem;
class SharingHelper
{
/**
* Main function to create a share of files and/or folders.
*
* @param type $fileIds
* @param type $folderIds
* @param type $shareUserId
* @param type $permissionLevel
* @param type $folderRecursive
* @param type $isGlobal
* @return object $fileFolderShare
*/
static function createShare($fileIds, $folderIds, $shareUserId = null, $permissionLevel = 'view', $folderRecursive = true, $isGlobal = 0, $createdByUserId = null) {
// get current user
$Auth = AuthHelper::getAuth();
$createdByUserId = $createdByUserId===null?$Auth->id:$createdByUserId;
// generate random accessKey
$accessKey = self::generateUniqueAccessKey();
// create new sharing object
$fileFolderShare = FileFolderShare::create();
$fileFolderShare->access_key = $accessKey;
$fileFolderShare->date_created = CoreHelper::sqlDateTime();
$fileFolderShare->created_by_user_id = $createdByUserId;
$fileFolderShare->shared_with_user_id = ((int) $shareUserId ? (int) $shareUserId : null);
$fileFolderShare->share_permission_level = $permissionLevel;
$fileFolderShare->is_global = $isGlobal;
$fileFolderShare->save();
// prepare folder ids
$folderIdsToAdd = array();
if (count($folderIds)) {
foreach ($folderIds AS $folderId) {
$folderIdsToAdd[] = $folderId;
if ($folderRecursive === true) {
$folderIdsToAdd = array_merge($folderIdsToAdd, FileFolderHelper::getAllChildFolderIdsRecurrsive($folderId));
}
}
}
// ensure folder array is unique
$folderIdsToAdd = array_unique($folderIdsToAdd);
// add actual folders
if (count($folderIdsToAdd)) {
foreach ($folderIdsToAdd AS $folderIdToAdd) {
$fileFolderShareItem = FileFolderShareItem::create();
$fileFolderShareItem->file_folder_share_id = $fileFolderShare->id;
$fileFolderShareItem->folder_id = $folderIdToAdd;
$fileFolderShareItem->date_created = CoreHelper::sqlDateTime();
$fileFolderShareItem->save();
}
}
// add files
if (count($fileIds)) {
foreach ($fileIds AS $fileId) {
$fileFolderShareItem = FileFolderShareItem::create();
$fileFolderShareItem->file_folder_share_id = $fileFolderShare->id;
$fileFolderShareItem->file_id = $fileId;
$fileFolderShareItem->date_created = CoreHelper::sqlDateTime();
$fileFolderShareItem->save();
}
}
return $fileFolderShare;
}
static function generateUniqueAccessKey() {
return CoreHelper::generateRandomString(128);
}
static function getTotalSharedByUser($userId) {
// get DB connection
$db = Database::getDatabase();
// return the total shared items in the root only
$totalFolders = (int) $db->getValue('SELECT COUNT(DISTINCT file_folder.id) AS totalFolderCount '
. 'FROM file_folder '
. 'WHERE file_folder.status = "active" '
. 'AND file_folder.id IN ('
. 'SELECT folder_id '
. 'FROM file_folder_share '
. 'LEFT JOIN file_folder_share_item ON file_folder_share.id = file_folder_share_item.file_folder_share_id '
. 'LEFT JOIN file_folder ON file_folder_share_item.folder_id = file_folder.id '
. 'WHERE (shared_with_user_id = :user_id OR (shared_with_user_id IS NULL AND is_global = 1)) '
. 'AND folder_id IS NOT NULL '
. 'AND (file_folder.parentId IS NULL OR file_folder.parentId NOT IN ('
. 'SELECT folder_id FROM file_folder_share LEFT JOIN file_folder_share_item ON file_folder_share.id = file_folder_share_item.file_folder_share_id WHERE shared_with_user_id = :user_id AND folder_id IS NOT NULL '
. '))'
. ')', array(
'user_id' => $userId,
));
$totalFiles = (int) $db->getValue('SELECT COUNT(DISTINCT file.id) AS totalFileCount '
. 'FROM file '
. 'WHERE file.status = "active" '
. 'AND file.id IN ('
. 'SELECT file_id '
. 'FROM file_folder_share '
. 'LEFT JOIN file_folder_share_item ON file_folder_share.id = file_folder_share_item.file_folder_share_id '
. 'WHERE (shared_with_user_id = :user_id OR (shared_with_user_id IS NULL AND is_global = 1)) '
. 'AND file_id IS NOT NULL '
. ')', array(
'user_id' => $userId,
));
return $totalFolders + $totalFiles;
}
/**
* Used for reloading/editing existing shares, based on the fileIds/folderIds
*
* @param type $fileIds
* @param type $folderIds
* @return type
*/
static function generateEditTrackerHash($fileIds, $folderIds) {
return md5('files=' . implode('-', $fileIds) . '-folders=' . implode('-', $folderIds));
}
public static function getSharedUsersForFilesAndFolders($fileIds = array(), $folderIds = array()) {
// make sure our input is safe
$safeFileIds = array_map('intval', $fileIds);
$safeFolderIds = array_map('intval', $folderIds);
if(count($safeFileIds) === 0 && count($safeFolderIds) === 0) {
return array();
}
// prep clause
$clause = array();
if(count($safeFileIds)) {
$clause[] = 'file_folder_share_item.file_id IN ('.implode(', ', $safeFileIds).')';
}
if(count($safeFolderIds)) {
$clause[] = 'file_folder_share_item.folder_id IN ('.implode(', ', $safeFolderIds).')';
}
// get db
$db = Database::getDatabase();
// get list of shares
return $db->getRows('SELECT DISTINCT users.email, users.id AS user_id, file_folder_share.id, '
. 'file_folder_share.share_permission_level '
. 'FROM file_folder_share '
. 'LEFT JOIN users ON file_folder_share.shared_with_user_id = users.id '
. 'LEFT JOIN file_folder_share_item ON file_folder_share.id = file_folder_share_item.file_folder_share_id '
. 'WHERE file_folder_share.shared_with_user_id IS NOT NULL '
. 'AND ('.implode(' OR ', $clause).')');
}
public static function removeShareById($shareId) {
// get db
$db = Database::getDatabase();
// remove the share
$db->query('DELETE '
. 'FROM file_folder_share_item '
. 'WHERE file_folder_share_id = :file_folder_share_id', array(
'file_folder_share_id' => $shareId,
));
// clear any shares which now have no items
$db->query('DELETE '
. 'FROM file_folder_share '
. 'WHERE (SELECT count(id) FROM file_folder_share_item WHERE file_folder_share_item.file_folder_share_id = file_folder_share.id) = 0');
return true;
}
}