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devicehub-teal/ereuse_devicehub/resources/device/models.py
Xavier Bustamante Talavera 1c5b4e0b16 Update device structure
2018-06-26 15:36:21 +02:00

309 lines
9.8 KiB
Python

from contextlib import suppress
from itertools import chain
from operator import attrgetter
from typing import Dict, Set
from sqlalchemy import BigInteger, Column, Enum as DBEnum, Float, ForeignKey, Integer, Sequence, \
SmallInteger, Unicode, inspect
from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy.orm import ColumnProperty, backref, relationship, validates
from sqlalchemy.util import OrderedSet
from sqlalchemy_utils import ColorType
from stdnum import imei, meid
from ereuse_devicehub.resources.enums import ComputerChassis, DataStorageInterface, DisplayTech, \
RamFormat, RamInterface
from ereuse_devicehub.resources.models import STR_BIG_SIZE, STR_SIZE, STR_SM_SIZE, Thing
from ereuse_utils.naming import Naming
from teal.db import CASCADE, POLYMORPHIC_ID, POLYMORPHIC_ON, ResourceNotFound, check_range
from teal.marshmallow import ValidationError
class Device(Thing):
"""
Base class for any type of physical object that can be identified.
"""
id = Column(BigInteger, Sequence('device_seq'), primary_key=True)
id.comment = """
The identifier of the device for this database.
"""
type = Column(Unicode(STR_SM_SIZE), nullable=False)
hid = Column(Unicode(STR_BIG_SIZE), unique=True)
hid.comment = """
The Hardware ID (HID) is the unique ID traceability systems
use to ID a device globally.
"""
model = Column(Unicode(STR_BIG_SIZE))
manufacturer = Column(Unicode(STR_SIZE))
serial_number = Column(Unicode(STR_SIZE))
weight = Column(Float(decimal_return_scale=3), check_range('weight', 0.1, 3))
weight.comment = """
The weight of the device in Kgm.
"""
width = Column(Float(decimal_return_scale=3), check_range('width', 0.1, 3))
width.comment = """
The width of the device in meters.
"""
height = Column(Float(decimal_return_scale=3), check_range('height', 0.1, 3))
height.comment = """
The height of the device in meters.
"""
depth = Column(Float(decimal_return_scale=3), check_range('depth', 0.1, 3))
color = Column(ColorType)
color.comment = """
"""
@property
def events(self) -> list:
"""
All the events where the device participated, including
1) events performed directly to the device, 2) events performed
to a component, and 3) events performed to a parent device.
Events are returned by ascending creation time.
"""
return sorted(chain(self.events_multiple, self.events_one), key=attrgetter('created'))
def __init__(self, **kw) -> None:
super().__init__(**kw)
with suppress(TypeError):
self.hid = Naming.hid(self.manufacturer, self.serial_number, self.model)
@property
def physical_properties(self) -> Dict[str, object or None]:
"""
Fields that describe the physical properties of a device.
:return A generator where each value is a tuple with tho fields:
- Column.
- Actual value of the column or None.
"""
# todo ensure to remove materialized values when start using them
# todo or self.__table__.columns if inspect fails
return {c.key: getattr(self, c.key, None)
for c in inspect(self.__class__).attrs
if isinstance(c, ColumnProperty)
and not getattr(c, 'foreign_keys', None)
and c.key not in {'id', 'type', 'created', 'updated', 'parent_id', 'hid'}}
@declared_attr
def __mapper_args__(cls):
"""
Defines inheritance.
From `the guide <http://docs.sqlalchemy.org/en/latest/orm/
extensions/declarative/api.html
#sqlalchemy.ext.declarative.declared_attr>`_
"""
args = {POLYMORPHIC_ID: cls.t}
if cls.t == 'Device':
args[POLYMORPHIC_ON] = cls.type
return args
def __lt__(self, other):
return self.id < other.id
def __repr__(self) -> str:
return '<{0.t} {0.id!r} model={0.model!r} S/N={0.serial_number!r}>'.format(self)
class DisplayMixin:
size = Column(Float(decimal_return_scale=2), check_range('size', 2, 150))
size.comment = """
The size of the monitor in inches.
"""
technology = Column(DBEnum(DisplayTech))
technology.comment = """
The technology the monitor uses to display the image.
"""
resolution_width = Column(SmallInteger, check_range('resolution_width', 10, 20000))
resolution_width.comment = """
The maximum horizontal resolution the monitor can natively support
in pixels.
"""
resolution_height = Column(SmallInteger, check_range('resolution_height', 10, 20000))
resolution_height.comment = """
The maximum vertical resolution the monitor can natively support
in pixels.
"""
class Computer(Device):
id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
chassis = Column(DBEnum(ComputerChassis), nullable=False)
@property
def events(self) -> list:
return sorted(chain(super().events, self.events_parent), key=attrgetter('created'))
class Desktop(Computer):
pass
class Laptop(Computer):
pass
class Server(Computer):
pass
class Monitor(DisplayMixin, Device):
id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
class ComputerMonitor(Monitor):
pass
class TelevisionSet(Monitor):
pass
class Mobile(Device):
id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
imei = Column(BigInteger)
imei.comment = """
The International Mobile Equipment Identity of the smartphone
as an integer.
"""
meid = Column(Unicode)
meid.comment = """
The Mobile Equipment Identifier as a hexadecimal string.
"""
@validates('imei')
def validate_imei(self, _, value: int):
if not imei.is_valid(value):
raise ValidationError('{} is not a valid imei.'.format(value))
@validates('meid')
def validate_meid(self, _, value: str):
if not meid.is_valid(value):
raise ValidationError('{} is not a valid meid.'.format(value))
class Smartphone(Mobile):
pass
class Tablet(Mobile):
pass
class Cellphone(Mobile):
pass
class Component(Device):
id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
parent_id = Column(BigInteger, ForeignKey(Computer.id))
parent = relationship(Computer,
backref=backref('components',
lazy=True,
cascade=CASCADE,
order_by=lambda: Component.id,
collection_class=OrderedSet),
primaryjoin=parent_id == Computer.id)
def similar_one(self, parent: Computer, blacklist: Set[int]) -> 'Component':
"""
Gets a component that:
- has the same parent.
- Doesn't generate HID.
- Has same physical properties.
:param parent:
:param blacklist: A set of components to not to consider
when looking for similar ones.
"""
assert self.hid is None, 'Don\'t use this method with a component that has HID'
component = self.__class__.query \
.filter_by(parent=parent, hid=None, **self.physical_properties) \
.filter(~Component.id.in_(blacklist)) \
.first()
if not component:
raise ResourceNotFound(self.type)
return component
@property
def events(self) -> list:
return sorted(chain(super().events, self.events_components), key=attrgetter('created'))
class JoinedComponentTableMixin:
@declared_attr
def id(cls):
return Column(BigInteger, ForeignKey(Component.id), primary_key=True)
class GraphicCard(JoinedComponentTableMixin, Component):
memory = Column(SmallInteger, check_range('memory', min=1, max=10000))
memory.comment = """
The amount of memory of the Graphic Card in MB.
"""
class DataStorage(JoinedComponentTableMixin, Component):
size = Column(Integer, check_range('size', min=1, max=10 ** 8))
size.comment = """
The size of the data-storage in MB.
"""
interface = Column(DBEnum(DataStorageInterface))
class HardDrive(DataStorage):
pass
class SolidStateDrive(DataStorage):
pass
class Motherboard(JoinedComponentTableMixin, Component):
slots = Column(SmallInteger, check_range('slots'))
slots.comment = """
PCI slots the motherboard has.
"""
usb = Column(SmallInteger, check_range('usb'))
firewire = Column(SmallInteger, check_range('firewire'))
serial = Column(SmallInteger, check_range('serial'))
pcmcia = Column(SmallInteger, check_range('pcmcia'))
class NetworkMixin:
speed = Column(SmallInteger, check_range('speed', min=10, max=10000))
speed.comment = """
The maximum speed this network adapter can handle, in mbps.
"""
class NetworkAdapter(JoinedComponentTableMixin, NetworkMixin, Component):
pass
class Processor(JoinedComponentTableMixin, Component):
speed = Column(Float, check_range('speed', 0.1, 15))
cores = Column(SmallInteger, check_range('cores', 1, 10))
address = Column(SmallInteger, check_range('address', 8, 256))
class RamModule(JoinedComponentTableMixin, Component):
size = Column(SmallInteger, check_range('size', min=128, max=17000))
speed = Column(Float, check_range('speed', min=100, max=10000))
interface = Column(DBEnum(RamInterface))
format = Column(DBEnum(RamFormat))
class Display(JoinedComponentTableMixin, DisplayMixin, Component):
"""
The display of a device. This is used in all devices that have
displays but that it is not their main treat, like laptops,
mobiles, smart-watches, and so on; excluding then ComputerMonitor
and Television Set.
"""
pass