delete fn

delete.js

//userdetails.cmaps has all the info of project to be deleted
module.exports.deletenode = function (userdetails) {
    return function(done) {
                Project.findOne({'_id': userdetails.cmaps.project_id}, function findmap(err, proj) {
            if (err) {
                done(null, "please login again");
            } else {
                var req_map = proj.maps[userdetails.cmaps.map_name];
                var deleted = {};
                var length = req_map.length;
                var key = 0;
                  for(var i =0 ; i <length; i++){
                    if(req_map[i].i_no == userdetails.cmaps.i_no ) {
                        key = 1;
                        break;
                        }
                    }
                  (function delete_all(i,req_map){
                    if(req_map[i].childi_no!=undefined)
                    {
                    var child_length = req_map[i].childi_no.length;
                    for (var j=0; j<child_length ; j++)
                    {
                        var k=0;
                        while(k < req_map.length && req_map[k].i_no != req_map[i].childi_no[j] )
                        {
                            k++;
                        }
                        delete_all(k,req_map);
                        deleted[req_map[k].i_no] = req_map[k];
                        req_map.splice(k,1);
                    }
                }
                })(i,req_map);
                 var z=0;
                 if(req_map.length>1)
                 {
                        while(req_map[i].parenti_no!=req_map[z].i_no)
                        {
                            z++;
                        }
                        var w=0;
                        while(req_map[z].childi_no[w]!=req_map[i].i_no)
                        {
                            w++;
                        }
                 req_map[z].childi_no.splice(w,1);
                }
                deleted[req_map[i].i_no] = req_map[i];
                req_map.splice(i,1);
                proj.markModified('maps');
                
                 proj.save(function save(){
                if (err) {
                    done(null, "map cannot be edited");
                }
                done(null, JSON.stringify({ map: proj.maps[userdetails.cmaps.map_name], deleted: deleted}));
            });
            }
            });                
        }
    }