78 lines
3.0 KiB
Python
78 lines
3.0 KiB
Python
import logging
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import requests
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from django.template.defaultfilters import floatformat
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logger = logging.getLogger("games")
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from games.models import ExchangeRate, Purchase
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# fixme: save preferred currency in user model
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currency_to = "CZK"
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currency_to = currency_to.upper()
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def save_converted_info(purchase, converted_price, converted_currency):
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logger.info(
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f"Setting converted price of {purchase} to {converted_price} {converted_currency} (originally {purchase.price} {purchase.price_currency})"
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)
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purchase.converted_price = converted_price
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purchase.converted_currency = converted_currency
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purchase.save()
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def convert_prices():
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purchases = Purchase.objects.filter(
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converted_price__isnull=True, converted_currency=""
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)
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if purchases.count() == 0:
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logger.info("[convert_prices]: No prices to convert.")
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for purchase in purchases:
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if purchase.price_currency.upper() == currency_to or purchase.price == 0:
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save_converted_info(purchase, purchase.price, currency_to)
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continue
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year = purchase.date_purchased.year
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currency_from = purchase.price_currency.upper()
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exchange_rate = ExchangeRate.objects.filter(
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currency_from=currency_from, currency_to=currency_to, year=year
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).first()
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logger.info(
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f"[convert_prices]: Looking for exchange rate in database: {currency_from}->{currency_to}"
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)
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if not exchange_rate:
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logger.info(
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f"[convert_prices]: Getting exchange rate from {currency_from} to {currency_to} for {year}..."
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)
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try:
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# this API endpoint only accepts lowercase currency string
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response = requests.get(
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f"https://cdn.jsdelivr.net/npm/@fawazahmed0/currency-api@{year}-01-01/v1/currencies/{currency_from.lower()}.json"
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)
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response.raise_for_status()
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data = response.json()
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currency_from_data = data.get(currency_from.lower())
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rate = currency_from_data.get(currency_to.lower())
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if rate:
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logger.info(f"[convert_prices]: Got {rate}, saving...")
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exchange_rate = ExchangeRate.objects.create(
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currency_from=currency_from,
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currency_to=currency_to,
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year=year,
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rate=floatformat(rate, 2),
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)
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else:
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logger.info("[convert_prices]: Could not get an exchange rate.")
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except requests.RequestException as e:
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logger.info(
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f"[convert_prices]: Failed to fetch exchange rate for {currency_from}->{currency_to} in {year}: {e}"
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)
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if exchange_rate:
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save_converted_info(
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purchase,
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floatformat(purchase.price * exchange_rate.rate, 0),
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currency_to,
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)
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