shipper.py

"""
Post Danmark shipping module
v 0.1

By Jakob Torp Svendsen - googletorp

- This module is still in development
"""

try:
    from decimal import Decimal
except:
    from django.utils._decimal import Decimal

from django.utils.translation import ugettext as _

from livesettings import config_get_group
from shipping.modules.base import BaseShipper
from shipping.modules.postdk.helper import pack_parcels

# Fees as per January 1st, 2009.
POSTDK_FEES = {
    'max_5': Decimal("75.00"),
    'max_10': Decimal("100.00"),
    'max_20': Decimal("160.00"),
    'volume': Decimal("76.00"),
    'fragile': Decimal("76.00"),
}



class Shipper(BaseShipper):

    id = "PostDK"
        
    def __str__(self):
        """
        This is mainly helpful for debugging purposes.
        """
        return "Post Danmark"
        
    def description(self):
        """
        A basic description that will be displayed to the user, when
        selecting their shipping options.
        """
        return _("Post Danmark shipping")

    def cost(self):
        """
        Complex calculations can be done here, as long as the return value is
        a decimal figure.
        """
        cartset = self.cart.cartitem_set.all()
        settings = config_get_group('shipping.modules.postdk')
        parcel_list = pack_parcels(cartset, settings)
        result = Decimal("0.00")
        for parcel in parcel_list:
            if parcel.weight <= 5:
                result += POSTDK_FEES['max_5']
            elif parcel.weight <= 10:
                result += POSTDK_FEES['max_10']
            elif parcel.weight <= 20:
                result += POSTDK_FEES['max_20']
            else:
                # TODO, raise error as we currently don't accept parcels over
                # 20 kg, or parcel has no weight.
                pass
            if parcel.volume_fee():
                result += POSTDK_FEES['volume']
        result += settings['POSTDK_HANDLING'].value
        result *= settings['POSTDK_CURRENCY'].value
        return result

    def method(self):
        """
        Describes the actual delivery service (Mail, FedEx, DHL, UPS, etc).
        """
        return _("Post Danmark")

    def expectedDelivery(self):
        """
        Can be a plain string or complex calcuation returning an actual date.
        """
        return settings['POSTDK_DAYS'].value

    def valid(self, order=None):
        """
        Can do complex validation about whether or not this option is valid.
        For example, may check to see if the recipient is in an allowed
        country or location.
        """
        # Only allow sending to Denmark for now. This is not a good way of
        # doing this, as it will simply disable the module.
        # TODO Need to figure out how to do better error handling with
        # satchmo.
        if not self.contact.shipping_address.country_id == 59:
            return False
        return True