91 lines
4.0 KiB
Python
91 lines
4.0 KiB
Python
from django.db import connection
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from apps.transactions.models import Transaction
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from apps.rates.models import ExchangeRate
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from decimal import Decimal
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import datetime
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class Calc:
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def ShowDiffRate(self, DayDiff, CurrentRate, Crypto, Fiat):
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with connection.cursor() as cursor:
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sql = """SELECT rate, datetime_valid FROM exchangerate WHERE crypto_currency = %s AND fiat_currency = %s
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AND datetime_valid BETWEEN %s AND %s
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ORDER BY datetime_valid DESC"""
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startDate = datetime.datetime.now() - datetime.timedelta(days=int(DayDiff))
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endDate = startDate + datetime.timedelta(days=1)
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cursor.execute(sql, [Crypto, Fiat, startDate, endDate])
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rateMinusXDay = cursor.fetchone()
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if rateMinusXDay:
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return {"dateRelative": "%s days ago" % (DayDiff,), "date" : rateMinusXDay[1], "rateEUR": rateMinusXDay[0],
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"diffPercentage": (CurrentRate.rate-Decimal(rateMinusXDay[0]))/Decimal(rateMinusXDay[0])*100, "rateUSD": None}
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return None
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def GetCurrentValue(self, userid, crypto, total_investment, current_value, total_tax_free):
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amount_kept = 0
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out = {}
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out["crypto"] = crypto
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with connection.cursor() as cursor:
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sql = """SELECT SUM(amount_after_fee) as after_fee, SUM(amount) as amount FROM `transaction` WHERE amount >= 0 and crypto_currency=%s and owner_id=%s"""
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cursor.execute(sql, [crypto, userid])
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bought = cursor.fetchone()
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if bought[1]:
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out["bought"] = bought[1]
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total_investment += Decimal(bought[1])
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amount_kept += Decimal(bought[0])
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else:
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out["bought"] = None
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with connection.cursor() as cursor:
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sql = """SELECT SUM(amount_before_fee) as before_fee, SUM(amount) as amount FROM `transaction` WHERE amount < 0 and crypto_currency=%s and owner_id=%s"""
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cursor.execute(sql, [crypto, userid])
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sold = cursor.fetchone()
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if sold[1]:
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out["sold"] = sold[1]
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total_investment += Decimal(sold[1])
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amount_kept += Decimal(sold[0])
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else:
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out["sold"] = None
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rateEUR = ExchangeRate.objects.filter(crypto_currency=crypto, fiat_currency='EUR').order_by('-datetime_valid').first()
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rateUSD = ExchangeRate.objects.filter(crypto_currency=crypto, fiat_currency='USD').order_by('-datetime_valid').first()
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if rateEUR:
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cv = Decimal(rateEUR.rate) * amount_kept
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current_value += cv
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out["current_value"] = cv
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out["amount_kept"] = amount_kept
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out["rateEUR"] = rateEUR.rate
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else:
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out["current_value"] = None
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out["amount_kept"] = None
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out["rateEUR"] = None
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out["rates"] = []
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if rateUSD and rateEUR:
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out["rates"].append({"dateRelative": "Now", "date" : rateEUR.datetime_valid, "rateEUR": rateEUR.rate, "diffPercentage": None, "rateUSD": rateUSD.rate})
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if rateEUR:
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for daydiff in ["1", "3", "7", "14", "30"]:
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diffrate = self.ShowDiffRate(daydiff, rateEUR, crypto, 'EUR')
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if diffrate:
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out["rates"].append(diffrate)
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amount_within_past_year = 0
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with connection.cursor() as cursor:
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sql = """SELECT SUM(amount_after_fee) as amount FROM `transaction` WHERE amount > 0 and crypto_currency=%s and owner_id=%s and date_valid>%s"""
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cursor.execute(sql, [crypto, userid, datetime.datetime.now() - datetime.timedelta(days=365)])
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bought = cursor.fetchone()
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out["bought_recently"] = None
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if bought[0]:
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out["bought_recently"] = bought[0]
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amount_within_past_year = Decimal(bought[0])
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amount_available_to_sell = amount_kept - amount_within_past_year
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out["bought_tax_free"] = None
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out["value_tax_free"] = None
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if rateEUR:
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out["bought_tax_free"] = amount_available_to_sell
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out["value_tax_free"] = amount_available_to_sell * rateEUR.rate
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total_tax_free += out["value_tax_free"]
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return (total_investment, current_value, total_tax_free, rateEUR.rate, rateUSD.rate, out)
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