Subversion Repositories SmartDukaan

'''

Created on 05-Aug-2010

@author: ashish

'''

from shop2020.thriftpy.logistics.ttypes import LogisticsInfo,\

    LogisticsServiceException, DeliveryType

from shop2020.logistics.service.impl.DataAccessor import get_empty_AWB,\

    get_shipment_info, initialize, get_logistics_estimation, get_provider,\

    get_providers, close_session, get_free_awb_count, get_holidays,\

    is_alive

from shop2020.logistics.service.impl.Converters import to_t_awbupdate,\

    to_t_provider

from shop2020.clients.CatalogClient import CatalogClient

from shop2020.config.client.ConfigClient import ConfigClient

import datetime

import math

import sys

from shop2020.logistics.service.impl import DataAccessor

class LogisticsServiceHandler:

    def __init__(self, dbname='logistics', db_hostname='localhost'):

        initialize(dbname, db_hostname)

        try:

            config_client = ConfigClient()

            self.cutoff_time = int(config_client.get_property('delivery_cutoff_time'))

            self.cod_cutoff_time = 0 #int(config_client.get_property('delivery_cutoff_time'))

            self.stock_threshold = int(config_client.get_property('inventory_stock_threshold'))

            self.time_to_procure = int(config_client.get_property('inventory_time_to_procure'))

            self.default_pincode = int(config_client.get_property('default_pincode'))

        except Exception as ex:

            print "[ERROR] Unexpected config error:", sys.exc_info()[0]

            self.cutoff_time = 15

            self.cod_cutoff_time = 0

            self.stock_threshold = 2

            self.time_to_procure = 48

            self.default_pincode = "110001"

    def getProvider(self, providerId):

        """

        Returns a provider for a given provider ID. Throws an exception if none found.

        Parameters:

         - providerId

        """

        try:

            provider = get_provider(providerId)

            if provider:

                return to_t_provider(provider)

            else:

                raise LogisticsServiceException(101, "No Provider found for the given id")

        finally:

            close_session()

    def getAllProviders(self, ):

        """

        Returns a list containing all the providers.

        """

        try:

            return [to_t_provider(provider) for provider in get_providers()]

        finally:

            close_session()

    def getLogisticsInfo(self, destination_pincode, itemId, type):

        """

        Parameters:

         - destination_pincode

         - item_id

         - type

        """

        try:

            logistics_info = self.get_logistics_estimation_with_type(itemId, destination_pincode, type)

            logistics_info.airway_billno = get_empty_AWB(logistics_info.providerId, type)

            return logistics_info

        finally:

            close_session()

    def getEmptyAWB(self, provider_id):

        """

        Parameters:

         - provider_id

        """

        try:

            return get_empty_AWB(provider_id)

        finally:

            close_session()

    def getShipmentInfo(self, awb, providerId):

        """

        Parameters:

         - awb

         - providerId

        """

        try:

            awb_updates = get_shipment_info(awb, providerId)

            t_updates = []

            for update in awb_updates:

                t_updates.append(to_t_awbupdate(update))

            return t_updates

        finally:

            close_session()

    def getLogisticsEstimation(self, itemId, destination_pin, type):

        """

        Parameters:

         - itemId

         - destination_pin

         - type

        """

        try:

            return self.get_logistics_estimation_with_type(itemId, destination_pin, type)

        finally:

            close_session()

    def get_logistics_estimation_with_type(self, itemId, destination_pin, type):

        if not destination_pin:

            destination_pin = self.default_pincode

        try:

            client = CatalogClient().get_client()

            item = client.getItem(itemId)

        except Exception as ex:

            raise LogisticsServiceException(103, "Unable to fetch inventory information about this item.")

        delivery_estimate = get_logistics_estimation(destination_pin, item.sellingPrice, None, type)

        if delivery_estimate is None:

            raise LogisticsServiceException(104, "Unable to fetch delivery estimate for this pincode.")

        warehouse_loc = delivery_estimate.warehouse_location

        try:

            #Get the id and location of actual warehouse that'll be used to fulfil this order.

            warehouse_loc, warehouse_id, items_in_inventory, expected_delay = client.getItemAvailabilityAtLocation(warehouse_loc, itemId)

        except Exception as ex:

            raise LogisticsServiceException(103, "Unable to fetch inventory information about this item.")

        # We are revising the estimates based on the actual warehouse that this order will be assigned to.

        # This warehouse may be located in a zone which is different from the one we allocated for this pincode.

        delivery_estimate = get_logistics_estimation(destination_pin, item.sellingPrice, warehouse_loc, type)

        if delivery_estimate is None:

            raise LogisticsServiceException(105, "Unable to fetch delivery estimate for pincode: " + destination_pin + " and revised location: " + str(warehouse_loc))

        delivery_time = 24 * delivery_estimate.delivery_time

        '''

        We're now calculating the expected shipping delay which is independent of

        the courier agency and is completely within our control (well, almost).

        '''

        #Always add the expected delay

        shipping_delay = 24 * expected_delay

        # Increase the estimate if the actual stock is less than the threshold 

        if items_in_inventory < self.stock_threshold :

            shipping_delay = shipping_delay + self.time_to_procure

        # Sometimes we set negative shipping delay just in case we know time to procure will be less than the default.

        # If we have received inventory and forgot to remove expected delay from item, it could lead to display negative shipping days. 

        if shipping_delay < 0:

            shipping_delay = 0

        #Further increase the estimate if it's late in the day

        current_hour = datetime.datetime.now().hour

        if type == DeliveryType.PREPAID and self.cutoff_time <= current_hour:

            shipping_delay = shipping_delay + 24

        elif type == DeliveryType.COD and self.cod_cutoff_time <= current_hour:

            shipping_delay = shipping_delay + 24

        #In case of COD,increase delay by one more day

        if type == DeliveryType.COD:

            shipping_delay = shipping_delay + 24

        delivery_time = delivery_time + shipping_delay

        shipping_delay = int(math.ceil(shipping_delay/24.0))

        delivery_time = int(math.ceil(delivery_time/24.0))

        logistics_info = LogisticsInfo()

        logistics_info.deliveryTime = delivery_time

        logistics_info.providerId = delivery_estimate.provider_id

        logistics_info.warehouseId = warehouse_id

        logistics_info.shippingTime = shipping_delay

        logistics_info.codAllowed = delivery_estimate.codAllowed 

        return logistics_info

    def getDestinationCode(self, providerId, pinCode):

        """

        Returns the short three letter code of a pincode for the given provider.

        Raises an exception if the pin code is not serviced by the given provider.

        Parameters:

         - providerId

         - pinCode

        """

        try:

            try:

                dest_code = DataAccessor.serviceable_location_cache[providerId][pinCode][0]

                return dest_code

            except:

                raise LogisticsServiceException(101, "The pincode " + pinCode + " is not serviced by this provider: " + str(providerId))

        finally:

            close_session()

    def getFreeAwbCount(self, providerId, type):

        """

        Returns the number of unused AWB numbers for the given provider of the given type

        Parameters:

         - providerId

         - type

        """

        try:

            return get_free_awb_count(providerId, type)

        finally:

            close_session()

    def getHolidays(self, fromDate, toDate):

        """

        Returns list of Holiday dates between fromDate and toDate (both inclusive)

        fromDate should be passed as milliseconds corresponding to the start of the day.

        If fromDate is passed as -1, fromDate is not considered for filtering

        If toDate is passed as -1, toDate is not considered for filtering

        Parameters:

         - fromDate

         - toDate

        """

        try:

            return get_holidays(fromDate, toDate)

        finally:

            close_session()

    def closeSession(self, ):

        close_session()

    def isAlive(self, ):

        """

        For checking weather service is active alive or not. It also checks connectivity with database

        """

        try:

            return is_alive()

        finally:

            close_session()