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views.py
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views.py
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from itertools import chain
from typing import List, Tuple
from django.core.urlresolvers import reverse_lazy
from django.http import Http404, JsonResponse
from django.shortcuts import redirect, render
from django.views.generic import View
from catalog.models import AbstractCategory, AbstractProduct
from search import search as search_engine
from pages.views import CustomPageView
from pages.models import Page
SEARCH_RESULT = Tuple[List[AbstractCategory], List[AbstractProduct]]
class SearchView(CustomPageView):
limit = 20
template_path = 'search/{}.html'
search_entities = []
def get_redirect_search_entity(self):
pass
def get_context_data(self, term: str, **kwargs) -> dict:
search_limit = search_engine.Limit(self.limit)
search_result = list(chain.from_iterable(
search_limit.limit_data(entity.search(term))
for entity in self.search_entities
))
return dict(
**super().get_context_data(**kwargs),
items=search_result,
term=term,
)
def get(self, request, *args, **kwargs):
term = request.GET.get('term')
# 404 - the most convenient error for bad get param
# http://bit.ly/refarm_conv_404_on_wrong_get_param
if not term:
raise Http404('Define "term" get parameter')
# if we have entity with id == int(term)
# then redirect to this entity
redirect_search_entity = self.get_redirect_search_entity()
if redirect_search_entity:
search_entity = redirect_search_entity.search_by_redirect_field(term)
if search_entity:
return redirect(search_entity.url, permanent=True)
self.object = self.get_object()
context = self.get_context_data(term=term)
search_result = context['items']
search_limit = search_engine.Limit(self.limit)
# if there is only one autocompleted entity
# then redirect to this entity
if search_limit.size == 1:
for model in search_result:
if model:
return redirect(
to=model.url,
permanent=True
)
has_result = bool(search_result)
template = self.template_path.format(
'results' if has_result else 'no_results'
)
return render(request, template, context)
class AutocompleteView(View):
limit = 20
search_entities = [] # query lookups
search_url = reverse_lazy(Page.CUSTOM_PAGES_URL_NAME, kwargs={'page': 'search'})
see_all_label = 'See all results'
@staticmethod
def prepare_fields(items, fields, context) -> list:
def get_dict(item):
# pairs of {name: value}
field_pairs = {attr: getattr(item, attr) for attr in fields}
field_pairs.update(context)
return field_pairs
return [get_dict(item) for item in items]
def see_all_link_as_list(self, term):
url = '{}?term={}'.format(self.search_url, term)
return [{'name': self.see_all_label,
'url': url,
'type': 'see_all'}]
def get(self, request):
def get_search_fields(search_name: str) -> List[str]:
"""
Return search fields for Search instance with name `search_name`
:param search_name:
:return:
"""
for search in self.search_entities:
if search.name == search_name:
return search.template_fields
return []
term = request.GET.get('term')
# 404 - the most convenient error for bad get param
# http://bit.ly/refarm_conv_404_on_wrong_get_param
if not term:
raise Http404('Define "term" get parameter')
search_limit = search_engine.Limit(self.limit)
search_result = {
entity.name: search_limit.limit_data(entity.search(term))
for entity in self.search_entities
}
if not any(search_result.values()):
return JsonResponse({})
# @todo #85 - refactor autocomplete view
# common view class should know nothing about search entities
autocomplete_items = (
self.prepare_fields(
search_result.get('category', []),
get_search_fields('category'),
{'type': 'category'}
) +
self.prepare_fields(
search_result.get('product', []),
get_search_fields('product'),
{'type': 'product'}
) +
self.see_all_link_as_list(request.GET.get('term'))
)
return JsonResponse(autocomplete_items, safe=False)
class AdminAutocompleteView(View):
limit = 20
search_entities = []
def get(self, request):
term, page_type = request.GET.get('term'), request.GET.get('pageType')
search_expression = next(
(item for item in self.search_entities if item.name == page_type),
None
)
if not search_expression:
return
search_limit = search_engine.Limit(self.limit)
search_result = {
search_expression.name: search_limit.limit_data(search_expression.search(term))
}
names = [
result_item.name
for result_item in search_result[search_expression.name]
]
return JsonResponse(names, safe=False)