117 lines
5.3 KiB
Python
117 lines
5.3 KiB
Python
from django.shortcuts import render
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from currencies.models import ExchangeRate, ExchangeRate_date, ExchangeRate_name
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from currencies import exchange_rates
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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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raw_data, today = exchange_rates.get_exchange_rate()
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message_no = "Already querried today: "
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message_yes = " Updated successfully: "
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count_raw_data = 0
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for currency, rate in raw_data.items():
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count_raw_data += 1
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if ExchangeRate_date.objects.filter(date__date=today) \
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and ExchangeRate_name.objects.get(name=currency):
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message_no += currency + ", "
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# A: https://stackoverflow.com/a/27802801/4061870
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else:
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if ExchangeRate_date.objects.filter(date=today)[:1]:
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try:
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date_dict = ExchangeRate_date.objects.filter(date=today).values()
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date = date_dict[0]['date']
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date_id = date_dict[0]['id']
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except Exception as e:
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print('date_dict %s (%s)' % (e, type(e)))
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else:
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try:
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exdate = ExchangeRate_date.objects.create(date=today)
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exdate.save()
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except Exception as e:
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print('exdate %s (%s)' % (e, type(e)))
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if ExchangeRate_name.objects.filter(name=currency)[:1]:
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try:
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name_dict = ExchangeRate_name.objects.get(name=currency)
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name = name_dict[0]['name']
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name_id = name_dict[0]['id']
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except Exception as e:
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print('exdate %s (%s)' % (e, type(e)))
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else:
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try:
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exname = ExchangeRate_name.objects.create(name=currency)
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exname.save()
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except Exception as e:
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print('exname %s (%s)' % (e, type(e)))
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try:
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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.only('id').get(name=currency).id,
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# date_id=date_id,
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date_id=ExchangeRate_date.objects.only('id').get(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 %s (%s)' % (e, type(e)))
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# prepare messages:
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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 first , with !
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message_yes = message_yes[::-1] # invert the string back
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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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else:
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message = "something whent wrong"
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currency_list = ExchangeRate.objects.all()
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# prepare data to be displayed in a html table:
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# https://stackoverflow.com/questions/8749158/removing-duplicates-from-dictionary#8749473
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# atomar_dates
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# A: https://stackoverflow.com/questions/37205793/django-values-list-vs-values#37205928
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# B: https://stackoverflow.com/questions/6521892/how-to-access-a-dictionary-key-value-present-inside-a-list
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# dates_list = ExchangeRate_date.objects.values_list('date', flat=True)
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# # atomar_currenies
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# currencies_list = ExchangeRate_name.objects.values_list('name', flat=True)
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# # search for currencies in a date and apend them to the list
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# currency_list = []
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# count_date = 0
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# count_currencies = 0
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# for date in dates_list:
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# count_date += 1
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# currency_dict = {}
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# currency_dict['date'] = date
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# for currency in currencies_list:
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# count_currencies += 1
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# try:
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# temp = ExchangeRate.objects.objects.only('exchange_rate_to_chf').get(name=currency).id
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# #temp = ExchangeRate.objects.filter(date=unique_date, name=currency).values() # A
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# exchange_rate_to_chf = temp[0]['exchange_rate_to_chf']
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# currency_dict = currency_dict.update({currency: exchange_rate_to_chf}) # B
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# except Exception as e:
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# print('%s (%s)' % (e, type(e)))
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# currency_list.append(currency_dict)
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# assert False
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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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'raw_data': raw_data,
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'today': today,
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# 'unique_dates_list': unique_dates_list,
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# 'unique_currencies_list': unique_currencies_list,
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'count_raw_data': count_raw_data,
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# 'count_currencies': count_currencies,
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# 'currency_dict': currency_dict,
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'message': message})
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