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| 1 | +# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html). |
| 2 | + |
| 3 | +import xml.etree.ElementTree as ET |
| 4 | +from datetime import date, timedelta |
| 5 | + |
| 6 | +import requests |
| 7 | + |
| 8 | +from odoo import _, fields, models |
| 9 | +from odoo.exceptions import UserError |
| 10 | + |
| 11 | + |
| 12 | +class ResCurrencyRateProviderFTA(models.Model): |
| 13 | + _inherit = "res.currency.rate.provider" |
| 14 | + |
| 15 | + service = fields.Selection( |
| 16 | + selection_add=[("fta", "Federal Tax Administration (Switzerland)")], |
| 17 | + ondelete={"fta": "set default"}, |
| 18 | + ) |
| 19 | + |
| 20 | + def _obtain_rates(self, base_currency, currencies, date_from, date_to): |
| 21 | + self.ensure_one() |
| 22 | + if self.service != "fta": |
| 23 | + return super()._obtain_rates(base_currency, currencies, date_from, date_to) |
| 24 | + base_url = "https://www.backend-rates.bazg.admin.ch/api/xmldaily" |
| 25 | + if date_from < date.today(): |
| 26 | + return self._get_historical_rate( |
| 27 | + base_url, currencies, date_from, date_to, base_currency |
| 28 | + ) |
| 29 | + else: |
| 30 | + return self._get_latest_rate(base_url, currencies, base_currency) |
| 31 | + |
| 32 | + def _get_latest_rate(self, base_url, currencies, base_currency): |
| 33 | + """Get all the exchange rates for today""" |
| 34 | + url = f"{base_url}" |
| 35 | + data = self._request_data(url) |
| 36 | + return {date.today(): self._parse_data(data, currencies)} |
| 37 | + |
| 38 | + def _get_historical_rate( |
| 39 | + self, base_url, currencies, date_from, date_to, base_currency |
| 40 | + ): |
| 41 | + """Get all the exchange rates from 'date_from' to 'date_to'""" |
| 42 | + content = {} |
| 43 | + current_date = date_from |
| 44 | + while current_date <= date_to: |
| 45 | + url = f"{base_url}/?d={current_date.strftime('%Y%m%d')}" |
| 46 | + data = self._request_data(url) |
| 47 | + content[current_date] = self._parse_data(data, currencies) |
| 48 | + current_date += timedelta(days=1) |
| 49 | + return content |
| 50 | + |
| 51 | + def _request_data(self, url): |
| 52 | + try: |
| 53 | + return requests.request("GET", url, timeout=10) |
| 54 | + except Exception as e: |
| 55 | + raise UserError( |
| 56 | + _("Couldn't fetch data. Please contact your administrator.") |
| 57 | + ) from e |
| 58 | + |
| 59 | + def _parse_data(self, data, currencies): |
| 60 | + result = {} |
| 61 | + root = ET.fromstring(data.content) |
| 62 | + namespace = {"ns": "https://www.backend-rates.ezv.admin.ch/xmldaily"} |
| 63 | + for devise in root.findall("ns:devise", namespace): |
| 64 | + currency_code = devise.get("code").upper() |
| 65 | + if currency_code in currencies: |
| 66 | + rate = devise.find("ns:kurs", namespace).text |
| 67 | + div = devise.find("ns:waehrung", namespace).text |
| 68 | + div_list = div.split(" ") |
| 69 | + divisor = int(div_list[0]) |
| 70 | + rate_float = float(rate) |
| 71 | + result[currency_code] = str(rate_float / divisor) |
| 72 | + return result |
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