Sith/counter/views.py
2016-08-05 09:52:19 +02:00

412 lines
16 KiB
Python

from django.shortcuts import render
from django.views.generic import ListView, DetailView, RedirectView
from django.views.generic.edit import UpdateView, CreateView, DeleteView, ProcessFormView, FormMixin
from django.forms.models import modelform_factory
from django.forms import CheckboxSelectMultiple
from django.core.urlresolvers import reverse_lazy
from django.contrib.auth.forms import AuthenticationForm
from django.http import HttpResponseRedirect
from django.utils import timezone
from django import forms
from django.utils.translation import ugettext_lazy as _
from django.conf import settings
from django.db import DataError, transaction
import re
from datetime import date, timedelta
from core.views import CanViewMixin, CanEditMixin, CanEditPropMixin, CanCreateMixin
from subscription.models import Subscriber
from subscription.views import get_subscriber
from counter.models import Counter, Customer, Product, Selling, Refilling, ProductType
class GetUserForm(forms.Form):
"""
The Form class aims at providing a valid user_id field in its cleaned data, in order to pass it to some view,
reverse function, or any other use.
The Form implements a nice JS widget allowing the user to type a customer account id, or search the database with
some nickname, first name, or last name (TODO)
"""
code = forms.CharField(label="Code", max_length=10, required=False)
id = forms.IntegerField(label="ID", required=False)
# TODO: add a nice JS widget to search for users
def as_p(self):
self.fields['code'].widget.attrs['autofocus'] = True
return super(GetUserForm, self).as_p()
def clean(self):
cleaned_data = super(GetUserForm, self).clean()
cus = None
if cleaned_data['code'] != "":
cus = Customer.objects.filter(account_id=cleaned_data['code']).first()
elif cleaned_data['id'] is not None:
cus = Customer.objects.filter(user=cleaned_data['id']).first()
sub = get_subscriber(cus.user) if cus is not None else None
if cus is None or sub is None or (date.today() - sub.subscriptions.last().subscription_end) > timedelta(days=90):
raise forms.ValidationError(_("User not found"))
cleaned_data['user_id'] = cus.user.id
cleaned_data['user'] = cus.user
return cleaned_data
class RefillForm(forms.ModelForm):
error_css_class = 'error'
required_css_class = 'required'
class Meta:
model = Refilling
fields = ['amount', 'payment_method', 'bank']
class CounterMain(DetailView, ProcessFormView, FormMixin):
"""
The public (barman) view
"""
model = Counter
template_name = 'counter/counter_main.jinja'
pk_url_kwarg = "counter_id"
form_class = GetUserForm # Form to enter a client code and get the corresponding user id
def get_context_data(self, **kwargs):
"""
We handle here the login form for the barman
"""
if self.request.method == 'POST':
self.object = self.get_object()
kwargs = super(CounterMain, self).get_context_data(**kwargs)
kwargs['login_form'] = AuthenticationForm()
kwargs['login_form'].fields['username'].widget.attrs['autofocus'] = True
kwargs['form'] = self.get_form()
if self.object.type == 'BAR':
kwargs['barmen'] = Counter.get_barmen_list(self.object.id)
elif self.request.user.is_authenticated():
kwargs['barmen'] = [self.request.user]
if 'last_basket' in self.request.session.keys():
kwargs['last_basket'] = self.request.session.pop('last_basket')
kwargs['last_customer'] = self.request.session.pop('last_customer')
kwargs['last_total'] = self.request.session.pop('last_total')
kwargs['new_customer_amount'] = self.request.session.pop('new_customer_amount')
return kwargs
def form_valid(self, form):
"""
We handle here the redirection, passing the user id of the asked customer
"""
self.kwargs['user_id'] = form.cleaned_data['user_id']
return super(CounterMain, self).form_valid(form)
def get_success_url(self):
return reverse_lazy('counter:click', args=self.args, kwargs=self.kwargs)
class CounterClick(DetailView):
"""
The click view
This is a detail view not to have to worry about loading the counter
Everything is made by hand in the post method
"""
model = Counter
template_name = 'counter/counter_click.jinja'
pk_url_kwarg = "counter_id"
def get(self, request, *args, **kwargs):
"""Simple get view"""
self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first()
if 'basket' not in request.session.keys(): # Init the basket session entry
request.session['basket'] = {}
request.session['basket_total'] = 0
request.session['not_enough'] = False
self.refill_form = None
ret = super(CounterClick, self).get(request, *args, **kwargs)
if ((self.object.type != "BAR" and not request.user.is_authenticated()) or
(self.object.type == "BAR" and
len(Counter.get_barmen_list(self.object.id)) < 1)): # Check that at least one barman is logged in
ret = self.cancel(request) # Otherwise, go to main view
return ret
def post(self, request, *args, **kwargs):
""" Handle the many possibilities of the post request """
self.object = self.get_object()
self.customer = Customer.objects.filter(user__id=self.kwargs['user_id']).first()
self.refill_form = None
if ((self.object.type != "BAR" and not request.user.is_authenticated()) or
(self.object.type == "BAR" and
len(Counter.get_barmen_list(self.object.id)) < 1)): # Check that at least one barman is logged in
return self.cancel(request)
if 'basket' not in request.session.keys():
request.session['basket'] = {}
request.session['basket_total'] = 0
request.session['not_enough'] = False
if self.object.type != "BAR":
self.operator = request.user
elif self.is_barman_price():
self.operator = self.customer.user
else:
self.operator = Counter.get_random_barman(self.object.id)
if 'add_product' in request.POST['action']:
self.add_product(request)
elif 'del_product' in request.POST['action']:
self.del_product(request)
elif 'refill' in request.POST['action']:
self.refill(request)
elif 'code' in request.POST['action']:
return self.parse_code(request)
elif 'cancel' in request.POST['action']:
return self.cancel(request)
elif 'finish' in request.POST['action']:
return self.finish(request)
context = self.get_context_data(object=self.object)
return self.render_to_response(context)
def is_barman_price(self):
if self.object.type == "BAR" and self.customer.user.id in [s.id for s in Counter.get_barmen_list(self.object.id)]:
return True
else:
return False
def get_price(self, pid):
p = Product.objects.filter(pk=pid).first()
if self.is_barman_price():
price = p.special_selling_price
else:
price = p.selling_price
return price
def sum_basket(self, request):
total = 0
for pid,infos in request.session['basket'].items():
total += infos['price'] * infos['qty']
return total / 100
def add_product(self, request, q = 1, p=None):
""" Add a product to the basket """
pid = p or request.POST['product_id']
pid = str(pid)
price = self.get_price(pid)
total = self.sum_basket(request)
if self.customer.amount < (total + q*float(price)):
request.session['not_enough'] = True
return False
if pid in request.session['basket']:
request.session['basket'][pid]['qty'] += q
else:
request.session['basket'][pid] = {'qty': q, 'price': int(price*100)}
request.session['not_enough'] = False # Reset not_enough to save the session
request.session.modified = True
return True
def del_product(self, request):
""" Delete a product from the basket """
pid = str(request.POST['product_id'])
if pid in request.session['basket']:
request.session['basket'][pid]['qty'] -= 1
if request.session['basket'][pid]['qty'] <= 0:
del request.session['basket'][pid]
else:
request.session['basket'][pid] = 0
request.session.modified = True
def parse_code(self, request):
"""Parse the string entered by the barman"""
string = str(request.POST['code']).upper()
if string == _("END"):
return self.finish(request)
elif string == _("CAN"):
return self.cancel(request)
regex = re.compile(r"^((?P<nb>[0-9]+)X)?(?P<code>[A-Z0-9]+)$")
m = regex.match(string)
if m is not None:
nb = m.group('nb')
code = m.group('code')
if nb is None:
nb = 1
else:
nb = int(nb)
p = self.object.products.filter(code=code).first()
if p is not None:
while nb > 0 and not self.add_product(request, nb, p.id):
nb -= 1
context = self.get_context_data(object=self.object)
return self.render_to_response(context)
def finish(self, request):
""" Finish the click session, and validate the basket """
with transaction.atomic():
request.session['last_basket'] = []
for pid,infos in request.session['basket'].items():
# This duplicates code for DB optimization (prevent to load many times the same object)
p = Product.objects.filter(pk=pid).first()
if self.is_barman_price():
uprice = p.special_selling_price
else:
uprice = p.selling_price
if uprice * infos['qty'] > self.customer.amount:
raise DataError(_("You have not enough money to buy all the basket"))
request.session['last_basket'].append("%d x %s" % (infos['qty'], p.name))
s = Selling(label=p.name, product=p, counter=self.object, unit_price=uprice,
quantity=infos['qty'], seller=self.operator, customer=self.customer)
s.save()
request.session['last_customer'] = self.customer.user.get_display_name()
request.session['last_total'] = "%0.2f" % self.sum_basket(request)
request.session['new_customer_amount'] = str(self.customer.amount)
del request.session['basket']
request.session.modified = True
kwargs = {
'counter_id': self.object.id,
}
return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs))
def cancel(self, request):
""" Cancel the click session """
kwargs = {'counter_id': self.object.id}
request.session.pop('basket', None)
return HttpResponseRedirect(reverse_lazy('counter:details', args=self.args, kwargs=kwargs))
def refill(self, request):
"""Refill the customer's account"""
form = RefillForm(request.POST)
if form.is_valid():
form.instance.counter = self.object
form.instance.operator = self.operator
form.instance.customer = self.customer
form.instance.save()
else:
self.refill_form = form
def get_context_data(self, **kwargs):
""" Add customer to the context """
kwargs = super(CounterClick, self).get_context_data(**kwargs)
kwargs['customer'] = self.customer
kwargs['basket_total'] = self.sum_basket(self.request)
kwargs['refill_form'] = self.refill_form or RefillForm()
return kwargs
class CounterLogin(RedirectView):
"""
Handle the login of a barman
Logged barmen are stored in the class-wide variable 'barmen_session', in the Counter model
"""
permanent = False
def post(self, request, *args, **kwargs):
"""
Register the logged user as barman for this counter
"""
self.counter_id = kwargs['counter_id']
form = AuthenticationForm(request, data=request.POST)
if form.is_valid():
user = Subscriber.objects.filter(username=form.cleaned_data['username']).first()
if user.is_subscribed():
Counter.add_barman(self.counter_id, user.id)
else:
print("Error logging the barman") # TODO handle that nicely
return super(CounterLogin, self).post(request, *args, **kwargs)
def get_redirect_url(self, *args, **kwargs):
return reverse_lazy('counter:details', args=args, kwargs=kwargs)
class CounterLogout(RedirectView):
permanent = False
def post(self, request, *args, **kwargs):
"""
Unregister the user from the barman
"""
self.counter_id = kwargs['counter_id']
Counter.del_barman(self.counter_id, request.POST['user_id'])
return super(CounterLogout, self).post(request, *args, **kwargs)
def get_redirect_url(self, *args, **kwargs):
return reverse_lazy('counter:details', args=args, kwargs=kwargs)
## Counter admin views
class CounterListView(CanViewMixin, ListView):
"""
A list view for the admins
"""
model = Counter
template_name = 'counter/counter_list.jinja'
class CounterEditView(CanEditPropMixin, UpdateView):
"""
Edit a counter's main informations (for the counter's admin)
"""
model = Counter
form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'sellers', 'products'],
widgets={
'products':CheckboxSelectMultiple,
'sellers':CheckboxSelectMultiple})
pk_url_kwarg = "counter_id"
template_name = 'counter/counter_edit.jinja'
class CounterCreateView(CanEditMixin, CreateView):
"""
Create a counter (for the admins)
"""
model = Counter
form_class = modelform_factory(Counter, fields=['name', 'club', 'type', 'products'],
widgets={'products':CheckboxSelectMultiple})
template_name = 'counter/counter_edit.jinja'
class CounterDeleteView(CanEditMixin, DeleteView):
"""
Delete a counter (for the admins)
"""
model = Counter
pk_url_kwarg = "counter_id"
template_name = 'core/delete_confirm.jinja'
success_url = reverse_lazy('counter:admin_list')
# Product management
class ProductTypeListView(CanEditPropMixin, ListView):
"""
A list view for the admins
"""
model = ProductType
template_name = 'counter/producttype_list.jinja'
class ProductTypeCreateView(CanCreateMixin, CreateView):
"""
A create view for the admins
"""
model = ProductType
fields = ['name', 'description', 'icon']
template_name = 'core/create.jinja'
class ProductTypeEditView(CanEditPropMixin, UpdateView):
"""
An edit view for the admins
"""
model = ProductType
template_name = 'core/edit.jinja'
fields = ['name', 'description', 'icon']
pk_url_kwarg = "type_id"
class ProductListView(CanEditPropMixin, ListView):
"""
A list view for the admins
"""
model = Product
template_name = 'counter/product_list.jinja'
class ProductCreateView(CanCreateMixin, CreateView):
"""
A create view for the admins
"""
model = Product
fields = ['name', 'description', 'product_type', 'code', 'purchase_price',
'selling_price', 'special_selling_price', 'icon', 'club']
template_name = 'core/create.jinja'
class ProductEditView(CanEditPropMixin, UpdateView):
"""
An edit view for the admins
"""
model = Product
fields = ['name', 'description', 'product_type', 'code', 'purchase_price',
'selling_price', 'special_selling_price', 'icon', 'club']
pk_url_kwarg = "product_id"
template_name = 'core/edit.jinja'
# TODO: add management of the 'counters' ForeignKey