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#!/usr/bin/env python 

# encoding: utf-8 

 

# Copyright (C) 2015 Chintalagiri Shashank 

# 

# This file is part of Tendril. 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU Affero General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program 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 program.  If not, see <http://www.gnu.org/licenses/>. 

 

""" 

Docstring for controller.py 

""" 

 

from sqlalchemy.orm.exc import NoResultFound 

 

from tendril.utils.db import with_db 

 

from model import SerialNumberSeries 

from model import SerialNumber 

from model import SerialNumberAssociation 

 

from tendril.utils import log 

logger = log.get_logger(__name__, log.DEFAULT) 

 

 

@with_db 

def get_series_obj(series=None, session=None): 

    return session.query(SerialNumberSeries).filter_by(series=series).one() 

 

 

@with_db 

def create_series_obj(series=None, start_seed=None, session=None): 

    if not series or not isinstance(series, str): 

        raise ValueError('series should be a string, got : ' + 

                         repr(series)) 

    if not start_seed or not isinstance(series, str): 

        raise ValueError('start_seed should be a string, got : ' + 

                         repr(start_seed)) 

    sobj = SerialNumberSeries(series=series, last_seed=start_seed) 

    session.add(sobj) 

    session.flush() 

    return sobj 

 

 

@with_db 

def get_all_serialnos(session=None): 

    return session.query(SerialNumber).all() 

 

 

@with_db 

def get_serialnos_by_efield(efield=None, session=None): 

    return session.query(SerialNumber).filter_by(efield=efield).all() 

 

 

@with_db 

def get_serialnos_by_series(series=None, session=None): 

    if not series or not isinstance(series, str): 

        raise ValueError('series should be a string, got : ' + repr(series)) 

    return session.query(SerialNumber).filter( 

        SerialNumber.sno.like('{0}%'.format(series))).all() 

 

 

@with_db 

def get_serialno_object(sno=None, session=None): 

    if sno is None: 

        raise AttributeError("sno cannot be None") 

    return session.query(SerialNumber).filter_by(sno=sno).one() 

 

 

@with_db 

def register_serialno(sno=None, efield=None, session=None): 

    sobj = SerialNumber(sno=sno, efield=efield) 

    session.add(sobj) 

    session.flush() 

    return sobj 

 

 

@with_db 

def delete_serialno(sno=None, session=None): 

    if sno is None: 

        raise AttributeError("sno cannot be None") 

    if not isinstance(sno, SerialNumber): 

        sno = get_serialno_object(sno=sno, session=session) 

    session.delete(sno) 

    session.flush() 

 

 

@with_db 

def link_serialno(child=None, parent=None, 

                  association_type=None, session=None): 

 

    if not isinstance(child, SerialNumber): 

        child = get_serialno_object(sno=child, session=session) 

    if not isinstance(parent, SerialNumber): 

        parent = get_serialno_object(sno=parent, session=session) 

 

    try: 

        existing = session.query(SerialNumberAssociation).filter_by( 

            child_id=child.id, parent_id=parent.id).one() 

        session.delete(existing) 

        session.flush() 

    except NoResultFound: 

        pass 

 

    assoc_object = SerialNumberAssociation(child_id=child.id, child=child, 

                                           parent_id=parent.id, parent=parent, 

                                           association_type=association_type) 

    session.add(assoc_object) 

    session.flush() 

    return assoc_object 

 

 

@with_db 

def get_child_snos(serialno=None, child_efield=None, child_series=None, 

                   session=None): 

 

    if serialno is None: 

        raise ValueError("serialno cannot be None") 

    if not isinstance(serialno, SerialNumber): 

        serialno = get_serialno_object(sno=serialno, session=session) 

 

    q = session.query(SerialNumberAssociation).filter_by( 

        parent_id=serialno.id 

    ) 

    q = q.join(SerialNumberAssociation.child) 

 

    if child_efield is not None: 

        q = q.filter(SerialNumber.efield == child_efield) 

 

    if child_series is not None: 

        q = q.filter(SerialNumber.sno.like(child_series+'%')) 

 

    return [x.child.sno for x in q.all()]