gistfile1.txt

  share: function(req,res){

        if(!req.param("id") || !req.param("permission")){
            return ErrorService.sendError(412,'Missing parameters',req,res);
        }

        shareFolderRecursively(parseInt(req.param("id"),10), req.param("permission"), function(){
            return console.log('DONE');
        });

        function shareFolderRecursively(id, permission,cb){
            Folder
                .findOne({ id: id })
                .populate('files')
                .populate('folders')
                .exec(function(err,folder){
                    if(err){
                        console.log(err);
                    }
                    folder.permission = permission;
                    folder.save(function(err){
                        if(err){
                            return ErrorService.sendError(404,err,req,res);
                        }
                        /** Loop trough all the current folder's files and update their permissions **/
                        async.each(
                            folder.files,
                            function shareFile(file,callback){
                                file.permission = permission;
                                file.save(function(err){
                                    if(err){
                                        callback(err);
                                    }
                                    else{
                                        callback();
                                    }
                                });
                            },
                            function(err){
                                if(err){
                                    console.log(err);
                                }
                                else if(folder.folders.length > 0 ){
                                    async.each(
                                        folder.folders,
                                        function reLoop(folder,callback2){
                                            shareFolderRecursively(folder.id,permission,callback2);
                                        },
                                        function(err){
                                            if(err){
                                                console.log(err);
                                            }
                                            else{
                                                cb();
                                            }
                                        }
                                    );
                                }
                                else{
                                    cb();
                                }
                            }
                        );
                    });
                });
        }

    }