254 lines
10 KiB
Python
254 lines
10 KiB
Python
import logging
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import csv
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import datetime
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from django.db.models import Q
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from django.core import serializers
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# Create your views here.
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from rest_framework import status
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from rest_framework import viewsets
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from rest_framework.response import Response
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from rest_framework.permissions import IsAuthenticatedOrReadOnly, IsAdminUser, IsAuthenticated
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from rest_framework.decorators import api_view, permission_classes, action
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from rest_framework.filters import OrderingFilter
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from django_filters.rest_framework import DjangoFilterBackend
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import requests
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from products.models import Product
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from products.serializers import ProductSerializer, TagFilterSerializer, SearchResultSerializer
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from companies.models import Company
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from history.models import HistorySync
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from back_latienda.permissions import IsCreator
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from .utils import extract_search_filters, find_related_products_v3, find_related_products_v6
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from utils.tag_serializers import TaggitSerializer
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from utils.tag_filters import ProductTagFilter, ProductOrderFilter
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logging.basicConfig(
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filename='logs/product-load.log',
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filemode='w',
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format='%(levelname)s:%(message)s',
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level=logging.INFO,
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)
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class ProductViewSet(viewsets.ModelViewSet):
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queryset = Product.objects.all().order_by('-created')
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serializer_class = ProductSerializer
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permission_classes = [IsAuthenticatedOrReadOnly, IsCreator]
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filter_backends = [DjangoFilterBackend, OrderingFilter]
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filterset_class = ProductTagFilter
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def perform_create(self, serializer):
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serializer.save(creator=self.request.user)
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@action(detail=True, methods=['GET',])
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def related(request):
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# TODO: find the most similar products
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return Response(data=[])
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@api_view(['GET',])
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@permission_classes([IsAuthenticated,])
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def my_products(request):
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qs = Product.objects.filter(creator=request.user)
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product_serializer = ProductSerializer(qs, many=True)
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return Response(data=product_serializer.data)
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@api_view(['POST',])
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@permission_classes([IsAuthenticated,])
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def load_coop_products(request):
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"""Read CSV file being received
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Parse it to create products for related Company
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"""
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try:
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csv_file = request.FILES['csv_file']
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if csv_file.name.endswith('.csv') is not True:
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logging.error(f"File {csv_file.name} is not a CSV file")
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return Response({"errors":{"details": "File is not CSV type"}})
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logging.info(f"Reading contents of {csv_file.name}")
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decoded_file = csv_file.read().decode('utf-8').splitlines()
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csv_reader = csv.DictReader(decoded_file, delimiter=',')
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counter = 0
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# get company linked to user
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company_qs = Company.objects.filter(creator=request.user)
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if company_qs:
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company = company_qs.first()
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else:
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return Response({"errors":{"details": "Your user has no company to add products to"}})
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# create historysync instance
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history = HistorySync.objects.create(company=company, sync_date=datetime.datetime.now(), quantity=len(decoded_file))
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for row in csv_reader:
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if '' in (row['nombre-producto'], row['descripcion'], row['precio'], row['categoria']):
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logging.error(f"Required data missing: {row}")
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continue
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try:
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# download image references in csv
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if row['imagen'].strip() != '':
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image_url = row['imagen'].strip()
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response = requests.get(image_url, stream=True)
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if response.status_code == 200:
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path = f"{setting.BASE_DIR}media/{row['nombre-producto'].strip()}.{image.url.split('/')[-1]}"
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logging.info(f"Saving product image to: {path}")
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new_image = open(path, 'wb')
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for chunk in response:
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new_image.write(chunk)
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new_image.close()
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else:
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logging.warning(f"Image URL did not work: {image_url}")
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new_image = None
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else:
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new_image = None
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# TODO: if tags is empty, auto-generate tags
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# assemble instance data
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product_data = {
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'id': None if row['id'].strip()=='' else row['id'].strip(),
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'company': Company.objects.filter(creator=request.user).first(),
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'name': row['nombre-producto'].strip(),
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'description': row['descripcion'].strip(),
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'image': new_image,
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'url': row['url'].strip(),
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'price': row['precio'].strip(),
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'shipping_cost': row['gastos-envio'].strip(),
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'shipping_terms': row['cond-envio'].strip(),
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'discount': row['descuento'].strip(),
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'stock': row['stock'].strip(),
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'tags': row['tags'].strip(),
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'category': row['categoria'].strip(),
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'identifiers': row['identificadores'].strip(),
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'history': history,
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'creator': request.user,
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}
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Product.objects.create(**product_data)
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logging.info(f"Created Product: {product_data}")
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counter += 1
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except Exception as e:
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logging.error(f"Could not parse {row}")
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return Response()
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except Exception as e:
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return Response({"errors": {"details": str(type(e))}}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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@api_view(['GET',]) # include allowed methods
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def product_search(request):
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"""
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Takes a string of data, return relevant products
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Params:
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- q: used for search [MANDATORY]
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- limit: max number of returned instances [OPTIONAL]
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- offset: where to start counting results [OPTIONAL]
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- shipping_cost: true/false
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- discount: true/false
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- category: string
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- tags: string
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- order: string (newest/oldest)
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- price_min: int
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- price_max: int
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In the response:
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- filters
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- count
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- products
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- price_min
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- price_max
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"""
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# capture query params
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q = request.GET.get('q', None)
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limit = request.GET.get('limit', None)
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offset = request.GET.get('offset', None)
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shipping_cost = request.GET.get('shipping_cost', None)
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if shipping_cost is not None:
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if shipping_cost == 'true':
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shipping_cost = True
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elif shipping_cost == 'false':
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shipping_cost = False
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else:
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shipping_cost = None
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discount = request.GET.get('discount', None)
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if discount is not None:
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if discount == 'true':
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discount = True
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elif discount == 'false':
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discount = False
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else:
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discount = None
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category = request.GET.get('category', None)
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tags = request.GET.get('tags', None)
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price_min = request.GET.get('price_min', None)
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price_max = request.GET.get('price_max', None)
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order = request.GET.get('order', '')
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if q is None:
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return Response({"errors": {"details": "No query string to parse"}})
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elif q is '':
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# return everything
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serializer = SearchResultSerializer(Product.objects.all(), many=True)
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products = serializer.data
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# filters = extract_search_filters(products)
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return Response(data={"filters": [], "count": len(products), "products": products})
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try:
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# we collect our results here
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result_set = set()
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# values for response
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prices = {
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'min': None,
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'max': None,
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}
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# split query string into single words
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chunks = q.split(' ')
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for chunk in chunks:
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product_set, min_price, max_price = find_related_products_v6(chunk, shipping_cost, discount, category, tags, price_min, price_max)
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# update price values
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if prices['min'] is None or min_price['price__min'] < prices['min']:
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prices['min'] = min_price['price__min']
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if prices['max'] is None or max_price['price__max'] > prices['max']:
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prices['max'] = max_price['price__max']
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# add to result set
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result_set.update(product_set)
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# TODO: add search for entire phrase ???
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# extract filters from result_set
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filters = extract_search_filters(result_set)
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result_list = list(result_set)
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if order == 'newest':
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# order results by created
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ordered_products = sorted(result_list, key= lambda x:x.created, reverse=True)
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elif order == 'oldest':
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# order results by created
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ordered_products = sorted(result_list, key= lambda x:x.created, reverse=False)
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else:
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# order results by RANK
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ordered_products = sorted(result_list, key= lambda rank:rank.rank, reverse=True)
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# extract max and min price values
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serializer = SearchResultSerializer(ordered_products, many=True)
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product_results = [dict(i) for i in serializer.data]
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total_results = len(product_results)
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# RESULTS PAGINATION
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if limit is not None and offset is not None:
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limit = int(limit)
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offset = int(offset)
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product_results = product_results[offset:(limit+offset)]
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elif limit is not None:
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limit = int(limit)
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product_results = product_results[:limit]
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return Response(data={"filters": filters, "count": total_results, "products": product_results, 'prices': prices})
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except Exception as e:
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return Response({"errors": {"details": str(e)}}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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