Subversion Repositories SmartDukaan

'''

Created on 10-May-2010

@author: ashish

'''

from elixir import *

from shop2020.model.v1.user.impl.Dataservice import Cart, Line, Address, User, Discount

from shop2020.thriftpy.model.v1.user.ttypes import CartStatus, LineStatus, ShoppingCartException,\

    PromotionException

import datetime

from shop2020.utils.Utils import to_py_date, to_java_date

from shop2020.thriftpy.model.v1.order.ttypes import Transaction as TTransaction,\

    TransactionStatus as TTransactionStatus, Order as TOrder, LineItem as TLineItem, OrderStatus 

from shop2020.thriftpy.model.v1.catalog.ttypes import Item as TItem

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

    LogisticsServiceException

from shop2020.clients.TransactionClient import TransactionClient

from shop2020.clients.CatalogClient import CatalogClient

from shop2020.clients.LogisticsClient import LogisticsClient

from shop2020.model.v1 import user

from shop2020.clients.PromotionClient import PromotionClient

from shop2020.model.v1.user.impl import UserDataAccessors

def get_cart(user_id):

    query = Cart.query.filter_by(user_id=user_id)      

    query = query.filter_by(cart_status = CartStatus.ACTIVE)

    try:

        cart = query.one()

        session.commit()

    except:

        return None

#        raise ShoppingCartException(101, "Cart does not exist")

    return cart

def get_cart_by_id(id):

    cart = Cart.get_by(id=id)

    return cart

def create_cart(user_id):

    cart = get_cart(user_id)

    if not cart: 

        cart = Cart()

        cart.user_id = user_id

        cart.created_on = datetime.datetime.now()

        cart.updated_on = datetime.datetime.now()

        cart.cart_status = CartStatus.ACTIVE

        session.commit()

    return cart

def get_cart_by_user_id_and_status(user_id, status):

    query = Cart.query.filter_by(user_id=user_id)

    if status:

        query = query.filter_by(cart_status=status)

    carts = query.all()

    return carts

def get_carts_by_status(status):

    return Cart.query.filter_by(cart_status=status).all()

def get_carts_between(start_time, end_time, status):

    init_time = to_py_date(start_time)

    finish_time = to_py_date(end_time)

    query = Cart.query

    if status:

        query = query.filter(Cart.cart_status==status)

    if init_time:

        query = query.filter(Cart.created_on >= init_time)

    if finish_time:

        query = query.filter(Cart.created_on <= finish_time)

    carts = query.all()

    return carts

def get_line(item_id, cart_id, status, single):

    #get cart first 

    try:

        found_cart = Cart.get_by(id=cart_id)

    except:

        raise ShoppingCartException(101, "cart not found ")

    query = Line.query.filter_by(cart = found_cart, item_id = item_id)

    if status:

        query = query.filter_by(line_status = status)

    else:

        query = query.filter_by(line_status = LineStatus.LINE_ACTIVE)

    try:

        if single:

            return query.one()

        else:

            return query.all()

    except:

        return None

def change_cart_status(cart_id, status):

    cart = get_cart_by_id(id)

    if not cart:

        raise ShoppingCartException(101, "no cart attached to this id")

    if not status:

        raise ShoppingCartException(101, "invalid status")

    cart.cart_status = status

    session.commit()

def add_item_to_cart(cart_id, item_id, quantity):

    if not item_id:

        raise ShoppingCartException(101, "item_id cannot be null")

    if not quantity:

        raise ShoppingCartException(101, "quantity cannot be null")    

    cart = Cart.get_by(id = cart_id)    

    if not cart:

        raise ShoppingCartException(101, "no cart attached to this id")

    retval = ""

    inventory_client = CatalogClient().get_client()

    item = inventory_client.getItem(item_id)

    item_shipping_info = inventory_client.isActive(item_id)

    if not item_shipping_info.isActive:

        return inventory_client.getItemStatusDescription(item_id)

    current_time = datetime.datetime.now()

    cart.updated_on = current_time

    line = get_line(item_id, cart_id, None,True)

    if line:

        #change the quantity only

        line.quantity = quantity

        line.updated_on = current_time

    else:

        line = Line()

        line.cart = cart

        line.item_id = item_id

        line.quantity = quantity

        line.created_on = current_time

        line.updated_on = current_time

        line.line_status = LineStatus.LINE_ACTIVE

    session.commit()

    return retval

def delete_item_from_cart(cart_id, item_id):

    if not item_id:

        raise ShoppingCartException(101, "item_id cannot be null")

    cart = Cart.get_by(id = cart_id)

    if not cart:

        raise ShoppingCartException(101, "no cart attached to this id")

    item = get_line(item_id, cart_id, None, True)

    count_deleted_discounts = delete_discounts_for_line(item)

    item.delete()

    current_time = datetime.datetime.now()

    cart.updated_on = current_time

    session.commit()

def delete_discounts_for_line(item_line):

    count_deleted = Discount.query.filter_by(line = item_line).delete()

    session.commit()

    return count_deleted

def delete_discounts_from_cart(cart_id, cart = None):

    if cart is None:

        if cart_id is None:

            raise ShoppingCartException(101, 'cart_id and cart, both cannot be null')

        else:

            cart = Cart.get_by(id = cart_id)

    if cart.lines:

        for line in cart.lines:

            delete_discounts_for_line(line)

def save_discounts(discounts):

    if not discounts:

        raise ShoppingCartException(101, 'discounts be null')

    if len(discounts) > 0:

        cart = Cart.get_by(id = discounts[0].cart_id)

        for t_discount in discounts:

            line = Line.query.filter_by(cart = cart, item_id = t_discount.item_id).first()

            if line is not None:

                discount = Discount()

                discount.line = line

                discount.discount = t_discount.discount

                discount.quantity = t_discount.quantity

                session.commit()

def change_item_status(cart_id, item_id, status):

    if not status:

        raise ShoppingCartException(101, "Status cannot be made null")

    line = get_line(item_id, cart_id, None, True)

    if line:

        line.line_status = status

        current_time = datetime.datetime.now()

        line.updated_on = current_time

        line.cart.updated_on = current_time

        session.commit()

    else:

        raise ShoppingCartException(101, "Unable to probe the line you desired")

def add_address_to_cart(cart_id, address_id):

    if not cart_id:

        raise ShoppingCartException(101, "cart id cannot be made null")

    if not address_id:

        raise ShoppingCartException(101, "address id cannot be made null")

    cart = get_cart_by_id(cart_id)

    if not cart:

        raise ShoppingCartException(101, "no cart for this id")

    address = Address.get_by(id=address_id)

    if not address:

        raise ShoppingCartException(101, "No address for this id")

    cart.address_id = address_id

    current_time = datetime.datetime.now()

    #cart.updated_on = current_time

    session.commit()

def apply_coupon_to_cart(cart_id, coupon_code, total_price, discounted_price):

    cart = get_cart_by_id(cart_id)

    if not cart:

        raise ShoppingCartException(101, "no cart attached to this id")

    cart.total_price = total_price

    cart.discounted_price = discounted_price

    cart.coupon_code = coupon_code

    session.commit()

def remove_coupon(cart_id):

    cart = get_cart_by_id(cart_id)

    if not cart:

        raise ShoppingCartException(101, "no cart attached to this id")

    #Resetting discounted price of each line in cart to Null

    for line in cart.lines:

        line.discounted_price = None

    delete_discounts_from_cart(cart = cart)

    cart.discounted_price = None

    cart.coupon_code = None

    session.commit()

def commit_cart(cart_id, sessionSource, sessionTime):   

    cart = get_cart_by_id(cart_id)   

    #now we have a cart. Need to create a transaction with it

    txn = TTransaction()

    txn.shoppingCartid = cart_id

    txn.customer_id = cart.user_id

    txn.createdOn = to_java_date(datetime.datetime.now())

    txn.transactionStatus = TTransactionStatus.INIT

    txn.statusDescription = "New Order"

    txn.coupon_code = cart.coupon_code

    txn.sessionSource = sessionSource

    txn.sessionStartTime = sessionTime

    txn.orders = create_orders(cart)

    transaction_client = TransactionClient().get_client()

    txn_id = transaction_client.createTransaction(txn)

    session.commit()

    #new_cart = create_cart(cart.user_id)

    #user = User.get_by(id=cart.user_id)

    #user.active_cart_id = new_cart.id

    #session.commit()

    return txn_id

def create_orders(cart):

    cart_lines = cart.lines

    orders = []

    for line in cart_lines:

        if line.line_status == LineStatus.LINE_ACTIVE:

            quantity_remaining_for_order = line.quantity

            for discount in line.discounts:

                i = 0

                while i < discount.quantity:

                    t_line_item = create_line_item(line.item_id, line.actual_price - discount.discount)

                    t_order = create_order(cart.user_id, cart.address_id, t_line_item)

                    orders.append(t_order)

                    i += 1

                quantity_remaining_for_order -= discount.quantity

            i = 0

            while i < quantity_remaining_for_order:

                t_line_item = create_line_item(line.item_id, line.actual_price)

                t_order = create_order(cart.user_id, cart.address_id, t_line_item)

                orders.append(t_order)

                i += 1

    return orders

def create_order(user_id, address_id, t_line_item):

    user = User.get_by(id=user_id)

    address = Address.get_by(id=address_id)

    t_order = TOrder()

    t_order.customer_id = user.id

    t_order.customer_email = user.email

    t_order.customer_name = address.name

    t_order.customer_pincode = address.pin

    t_order.customer_address1 = address.line_1

    t_order.customer_address2 = address.line_2

    t_order.customer_city = address.city

    t_order.customer_state = address.state

    t_order.customer_mobilenumber = address.phone

    t_order.total_amount = t_line_item.total_price

    t_order.total_weight = t_line_item.total_weight

    t_order.lineitems = [t_line_item]

    t_order.status = OrderStatus.PAYMENT_PENDING

    t_order.statusDescription = "Payment Pending"

    t_order.created_timestamp = to_java_date(datetime.datetime.now())

    return t_order

def create_line_item(item_id, final_price):

    inventory_client = CatalogClient().get_client()

    item = inventory_client.getItem(item_id)

    t_line_item = TLineItem()

    t_line_item.productGroup = item.productGroup

    t_line_item.brand = item.brand

    t_line_item.model_number = item.modelNumber

    if item.color is None or item.color == "NA":

        t_line_item.color = ""

    else:

        t_line_item.color = item.color

    t_line_item.model_name = item.modelName

    t_line_item.extra_info = item.featureDescription

    t_line_item.item_id = item.id

    t_line_item.quantity = 1

    t_line_item.unit_price = final_price

    t_line_item.total_price = final_price

    t_line_item.unit_weight = item.weight

    t_line_item.total_weight = item.weight

    return t_line_item

def validate_cart(cartId):

    inventory_client = CatalogClient().get_client()

    logistics_client = LogisticsClient().get_client()

    promotion_client = PromotionClient().get_client()

    retval = ""

    # No need to validate duplicate items since there are only two ways

    # to add items to a cart and both of them check whether the item being

    # added is a duplicate of an already existing item.

    cart = Cart.get_by(id=cartId)

    cart_lines = cart.lines

    customer_pincode = None

    current_time = datetime.datetime.now()

    if cart.address_id:

        address = Address.get_by(id=cart.address_id)

        customer_pincode = address.pin

    if not customer_pincode:

        user = User.get_by(active_cart_id = cartId)

        default_address_id = user.default_address_id

        if default_address_id:

            address = Address.get_by(id = default_address_id)

            customer_pincode = address.pin

    if not customer_pincode:

        #FIXME should not be hard coded. May be we can pick from config server.

        customer_pincode = "110001"

    cart.total_price = 0

    for line in cart_lines:

        old_estimate = line.estimate

        item_id = line.item_id

        item = inventory_client.getItem(item_id)

        item_shipping_info = inventory_client.isActive(item_id) 

        if item_shipping_info.isActive:

            if item_shipping_info.isRisky and item_shipping_info.quantity < line.quantity:

                line.quantity = 1

                retval = "Try adding a smaller quantity of " + item.brand + " " + item.modelNumber + " (" + item.color + ")"

            line.actual_price = item.sellingPrice 

            cart.total_price = cart.total_price + (line.actual_price * line.quantity)

            try:

                item_delivery_estimate = logistics_client.getLogisticsEstimation(item_id, customer_pincode).deliveryTime

            except LogisticsServiceException:

                item_delivery_estimate = -1

                #TODO Use the exception clause to set the retval appropriately

            except :

                item_delivery_estimate = -1

            if old_estimate != item_delivery_estimate:

                line.estimate = item_delivery_estimate

                cart.updated_on = current_time

                if old_estimate != None:

                    retval = "Delivery Estimates updated."

        else:

            line.delete()

            retval = "Some items have been removed from the cart."

    if cart.checked_out_on is not None:

        if cart.updated_on > cart.checked_out_on:

            cart.checked_out_on = None

            if retval == "":

                retval = "Your cart has been updated after the last checkout."

    session.commit()

    if cart.coupon_code is not None:

        try:

            updated_cart = promotion_client.applyCoupon(cart.coupon_code, cart.id)

            for t_line in updated_cart.lines:

            #Find the line in the database which corresponds to this line

                line = Line.query.filter_by(cart = cart).filter_by(item_id = t_line.itemId).one()

            #Update its discounted price.

                line.discounted_price = t_line.discountedPrice

            cart.discounted_price = updated_cart.discountedPrice

            session.commit()

        except PromotionException as ex:

            remove_coupon(cart.id)

            retval = ex.message

    return retval

def merge_cart(fromCartId, toCartId):

    fromCart = Cart.get_by(id=fromCartId)

    toCart = Cart.get_by(id=toCartId)

    old_lines = fromCart.lines

    new_lines = toCart.lines

    for line in old_lines:

        flag = True

        for new_line in new_lines:

            if line.item_id == new_line.item_id:

                flag = False

        if flag:

            toCart.lines.append(line)

    if toCart.coupon_code is None:

        toCart.coupon_code = fromCart.coupon_code

    toCart.updated_on = datetime.datetime.now()

    fromCart.expired_on = datetime.datetime.now()

    fromCart.cart_status = CartStatus.INACTIVE

    session.commit()

def check_out(cartId):

    if cartId is None:

        raise ShoppingCartException(101, "Cart id not specified")

    cart = Cart.get_by(id = cartId)

    if cart is None:

        raise ShoppingCartException(102, "The specified cart couldn't be found")

    cart.checked_out_on = datetime.datetime.now()

    session.commit()

    return True

def reset_cart(cartId, items):

    if cartId is None:

        raise ShoppingCartException(101, "Cart id not specified")

    for item_id, quantity in items.iteritems():

        line = Line.query.filter_by(cart_id=cartId, item_id=item_id).one()

        if line is not None:

            line.discounted_price = None

            line.quantity = line.quantity - quantity

            if line.quantity == 0:

                line.delete()

    cart = Cart.get_by(id=cartId)

    cart.updated_on = datetime.datetime.now()

    cart.checked_out_on = None

    # Removing Coupon

    cart.total_price = None

    cart.discounted_price = None

    cart.coupon_code = None

    session.commit()

    return True

def get_carts_with_coupon_count(coupon_code):

    return Cart.query.filter_by(coupon_code = coupon_code).count()

def close_session():

    if session.is_active:

        print "session is active. closing it."

        session.close()