151 lines
6.5 KiB
Python
151 lines
6.5 KiB
Python
from django.shortcuts import render
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import datetime
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from django.views.generic.edit import UpdateView
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from django.core.urlresolvers import reverse_lazy
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from currencies.models import (ExchangeRate,
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ExchangeRate_date,
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ExchangeRate_name)
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from currencies import exchange_rates
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from currencies.forms import CurrencyForm
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from django.http import JsonResponse
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def CurrencyUpdate(request):
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currency = request.GET.get('CurrencyUpdate', None)
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data = {
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'currency': ExchangeRate_name.objects.get(
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currency).id
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}
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print('currency: ', currency, 'data: ', data)
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return JsonResponse(data)
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def currencies(request):
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# this function fetches the data from exchange_rates.py
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# evaluates if the values are already stored and
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# prepares the view all dynamicaly.
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# It can grow in terms of more Currencies over time automaticaly.
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today = ''
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raw_data = []
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try:
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raw_data, today = exchange_rates.get_exchange_rate()
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except Exception as e:
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print('views raw_data: ', raw_data, 'error:', e) # assert False
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message_no = "Already querried today: "
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message_yes = " Updated successfully: "
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# raw_data can be empty. In this case skip:
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if raw_data:
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# if raw_data is not empty iterate over items in it:
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for currency, rate in raw_data.items():
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# check for already existing exrates per day and add
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# to message that its already been saved.
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if ExchangeRate.objects.filter(
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date__date=today,
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name__name=currency):
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message_no += currency + ", "
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else:
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if ExchangeRate_date.objects.filter(date=today)[:1]:
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# if data and currency is not yet present, save it.
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try:
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# A: https://stackoverflow.com/a/27802801/4061870
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# lustigerweise gibt .values() den value und die id
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# zurück. Ohne .values() gibts nur den "value"
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date_dict = ExchangeRate_date.objects.filter(
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date=today).values()
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except Exception as e:
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print('exdate_exists %s (%s) on %s'
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% (e, type(e), today))
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else:
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try:
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exdate = ExchangeRate_date.objects.create(
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date=today)
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exdate.save()
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except Exception as e:
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print('exdate_not_exists %s (%s) for %s'
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% (e, type(e), today))
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if ExchangeRate_name.objects.filter(
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name=currency)[:1]:
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# if data and currency is not yet present, save it.
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try:
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name_dict = ExchangeRate_name.objects.filter(
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name=currency).values()
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except Exception as e:
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print('exname_exists %s (%s) on %s'
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% (e, type(e), currency))
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else:
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try:
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exname = ExchangeRate_name.objects.create(
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name=currency)
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exname.save()
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except Exception as e:
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print('exname_not_exists %s (%s) on %s'
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% (e, type(e), currency))
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try:
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# save item to where id's match.
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exrate = ExchangeRate.objects.create(
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# name_id=name_id,
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name_id=ExchangeRate_name.objects.get(
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name=currency).id,
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# date_id=date_id,
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date_id=ExchangeRate_date.objects.get(
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date=today).id,
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exchange_rate_to_chf=rate,
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)
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exrate.save()
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message_yes += currency + ", "
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except Exception as e:
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print('exrate_create %s (%s) on %s for %s'
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% (e, type(e), currency, today))
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# prepare messages:
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# python can not swap a char insinde a sting so i have
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# to invert and swap and then invert back:
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message_no = message_no[::-1] # invert the string
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message_no = message_no.replace(",", "!", 1) # replace first , with !
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message_no = message_no[::-1] # invert the string back
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message_yes = message_yes[::-1] # invert the string
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message_yes = message_yes.replace(",", "!", 1) # replace f. , with !
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message_yes = message_yes[::-1] # invert the string back
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# here we evaluate what kind of message is valid:
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if len(message_no) > 24 and len(message_yes) > 23:
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message = message_no + message_yes
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elif len(message_no) > 24:
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message = message_no
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elif len(message_yes) > 23:
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message = message_yes
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elif datetime.datetime.today().isoweekday() == 6:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Es ist Samstag, die SNB publiziert nur an Arbeitstagen
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neue Kurse...
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"""
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elif datetime.datetime.today().isoweekday() == 7:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Es ist Sonntag, die SNB publiziert nur an Arbeitstagen
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neue Kurse...
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"""
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else:
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message = """Die Abfrage wurde ohne ergebniss beendet.
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Kann es sein dass die SNB aufgrund eines Feiertages
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geschlossen ist?
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"""
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# know we can query our data for presentaton:
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currency_list = ExchangeRate.objects.all()
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currency_USD_list = ExchangeRate.objects.filter(
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name__name='USD').order_by('date__date')
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currency_EUR_list = ExchangeRate.objects.filter(
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name__name='EUR').order_by('date__date')
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currency_JPY_list = ExchangeRate.objects.filter(
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name__name='JPY').order_by('date__date')
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currency_GBP_list = ExchangeRate.objects.filter(
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name__name='GBP').order_by('date__date')
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# and publish it on template:
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return render(request,
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'currencies/index.html',
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{'currency_list': currency_list,
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'currency_USD_list': currency_USD_list,
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'currency_EUR_list': currency_EUR_list,
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'currency_JPY_list': currency_JPY_list,
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'currency_GBP_list': currency_GBP_list,
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'message': message})
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