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
import datetime
from math import floor

def execute(cart, coupon_code, args):
    if 'handset_display_name' not in args:
        raise PromotionException(109, 'Error in rule arguments.')
            
    if 'end_on' in args and datetime.datetime.strptime(args['end_on'], '%Y-%m-%d') <= datetime.datetime.now():
        raise PromotionException(112, 'This promotion is expired.')
         
    if 'usage_limit' in args and args['usage_limit'] is not None:
        if args['usage_limit'] <= get_coupon_usage_count(coupon_code):
            raise PromotionException(112, 'This promotion is over.')
    
    user_client = UserClient().get_client()
    user = user_client.getUserByCartId(cart.id)

    if 'usage_limit_for_user' in args and args['usage_limit_for_user'] is not None:
        if args['usage_limit_for_user'] <= get_coupon_usage_count_by_user(coupon_code, user.userId):
            raise PromotionException(111, 'You have already used this coupon maximum possible times.')
    
    if not cart.lines:
        return cart


    discountJ = None
    if 'discount' in args:
        discountJ  = args ['discount']

    min_amount = None
    if 'min_amount' in args:
        min_amount  = args ['min_amount']

    max_discount = 10000
    if 'max_discount' in args:
        max_discount  = args ['max_discount']
    
    discount_left = max_discount
        
    
    isPercentageDiscount = False
    if 'is_percentage_discount' in args:
        isPercentageDiscount = args['is_percentage_discount']

    total_discounts = 0
    cart_has_specified_item = False
    discounts = []

    for line in cart.lines:
        if discount_left > 0 :
            discount_value = 0
            
            if min_amount is not None and line.actualPrice < min_amount:
                continue
    
            if 'items' in args:
                if line.itemId in args['items'] :
                    if type(args['items'])==dict: 
                        discount_value = args['items'][line.itemId]
                        cart_has_specified_item = True
                    elif discountJ is not None:
                        discount_value = discountJ
                        cart_has_specified_item = True
                else:
                    continue
            elif 'categories' in args:
                catalog_client = CatalogClient().get_client()
                category = catalog_client.getItem(line.itemId).category
                if category in args['categories']:
                    if type(args['categories'])==dict: 
                        discount_value = args['categories'][category]
                        cart_has_specified_item = True
                    elif discountJ is not None:
                        discount_value = discountJ 
                        cart_has_specified_item = True
                else:
                    continue
            elif discountJ is not None:
                discount_value = discountJ 
                cart_has_specified_item = True
            else :
                continue
        
            if isPercentageDiscount:
                discount_value = round((line.actualPrice*discount_value)/100, 4)
            
            quantity = min(floor(discount_left/discount_value), line.quantity)
            if quantity > 0:
                discount = Discount()
                discount.cart_id = cart.id
                discount.item_id = line.itemId
                discount.quantity = quantity
                discount.discount = discount_value
                discounts.append(discount)
                
                discount_left = discount_left - quantity*discount_value
                total_discounts += round(discount_value * quantity, 4)
            
            if discount_left > 0 and line.quantity - quantity > 0:
                discountOne = Discount()
                discountOne.cart_id = cart.id
                discountOne.item_id = line.itemId
                discountOne.quantity = 1
                discountOne.discount = discount_left
                discounts.append(discountOne)

                discount_left = 0
                total_discounts = max_discount
                    
        else:
            break
    
    if cart_has_specified_item is False:
        raise PromotionException(115, 'This coupon is applicable only for ' + args['handset_display_name'])
    
    cart.discountedPrice = cart.totalPrice - round(total_discounts, 0)
    return cart, discounts

def getDiscountOnItem(item):
    return None