Subversion Repositories SmartDukaan

'''
Created on 06-Jul-2011

@author: Varun Gupta
'''
from shop2020.clients.CatalogClient import CatalogClient
from shop2020.clients.UserClient import UserClient
from shop2020.model.v1.user.impl.PromotionRuleDataUtilities import \
    get_coupon_usage_count, get_coupon_usage_count_by_user
from shop2020.thriftpy.model.v1.user.ttypes import PromotionException, Discount
from shop2020.model.v1.user.impl import PromotionDataAccessors

def execute(cart, coupon):
        
    if coupon.usageLimit is not None:
        if coupon.usageLimit <= get_coupon_usage_count(coupon.couponCode):
            raise PromotionException(112, 'This promotion is over.')
    
    user_client = UserClient().get_client()
    user = user_client.getUserByCartId(cart.id)

    if coupon.usageLimitForUser is not None:
        if coupon.usageLimitForUser <= get_coupon_usage_count_by_user(coupon.couponCode, user.userId):
            raise PromotionException(111, 'You have already used this coupon maximum possible times.')
    
    if not cart.lines:
        return cart
    
    total_selling_price = 0
    total_discounted_price = 0
    cart_has_specified_item = False
    discounts = []
    
    
    couponMappings = PromotionDataAccessors.coupon_item_mapping_cache.get(coupon.couponCode)

    for line in cart.lines:
        total_selling_price += line.actualPrice * line.quantity
        discount_value = 0
        
        if couponMappings.has_key(line.itemId) :
            cart_has_specified_item = True
            line.discountedPrice = round(line.actualPrice - couponMappings[line.itemId], 4)
            total_discounted_price += round(line.discountedPrice * line.quantity, 4)
            discount_value = couponMappings[line.itemId]
        else:
            total_discounted_price += round(line.actualPrice * line.quantity, 4)
        
        if discount_value > 0:
            discount = Discount()
            discount.discount = discount_value
            discount.quantity = line.quantity
            discount.cart_id = cart.id
            discount.item_id = line.itemId
            
            discounts.append(discount)
    
    if cart_has_specified_item is False:
        raise PromotionException(115, 'This coupon is not applicable current items in cart')
    
    cart.totalPrice = round(total_selling_price, 4)
    cart.discountedPrice = total_discounted_price
    return cart, discounts

def getDiscountOnItem(item):
    return 100