[ADD] currency_rate_update_fta: Currency Rate Update: Federal Tax Adm…

…inistration

currency_rate_update_fta/__init__.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from . import models

currency_rate_update_fta/__manifest__.py

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+# Copyright 2025 Openindustry
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+{
+    "name": "Currency Rate Update: Federal Tax Administration",
+    "version": "16.0.1.0.0",
+    "license": "AGPL-3",
+    "summary": """
+        Update exchange rates using https://www.backend-rates.bazg.admin.ch/api/xmldaily
+    """,
+    "category": "Financial Management/Configuration",
+    "company": "https://openindustry.it",
+    "author": "Openindustry.it,Odoo Community Association (OCA)",
+    "maintainers": ["andreampiovesana"],
+    "support": "andrea.m.piovesana@gmail.com",
+    "website": "https://github.com/OCA/l10n-switzerland",
+    "depends": [
+        "currency_rate_update",
+    ],
+    "installable": True,
+    "application": False,
+    "auto_install": False,
+    "price": 10.00,
+    "currency": "EUR",
+}

currency_rate_update_fta/models/__init__.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+from . import res_currency_rate_provider_fta

currency_rate_update_fta/models/res_currency_rate_provider_fta.py

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+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+import xml.etree.ElementTree as ET
+from datetime import date, timedelta
+
+import requests
+
+from odoo import _, fields, models
+from odoo.exceptions import UserError
+
+
+class ResCurrencyRateProviderFTA(models.Model):
+    _inherit = "res.currency.rate.provider"
+
+    service = fields.Selection(
+        selection_add=[("fta", "Federal Tax Administration (Switzerland)")],
+        ondelete={"fta": "set default"},
+    )
+
+    def _obtain_rates(self, base_currency, currencies, date_from, date_to):
+        self.ensure_one()
+        if self.service != "fta":
+            return super()._obtain_rates(base_currency, currencies, date_from, date_to)
+        base_url = "https://www.backend-rates.bazg.admin.ch/api/xmldaily"
+        if date_from < date.today():
+            return self._get_historical_rate(
+                base_url, currencies, date_from, date_to, base_currency
+            )
+        else:
+            return self._get_latest_rate(base_url, currencies, base_currency)
+
+    def _get_latest_rate(self, base_url, currencies, base_currency):
+        """Get all the exchange rates for today"""
+        url = f"{base_url}"
+        data = self._request_data(url)
+        return {date.today(): self._parse_data(data, currencies)}
+
+    def _get_historical_rate(
+        self, base_url, currencies, date_from, date_to, base_currency
+    ):
+        """Get all the exchange rates from 'date_from' to 'date_to'"""
+        content = {}
+        current_date = date_from
+        while current_date <= date_to:
+            url = f"{base_url}/?d={current_date.strftime('%Y%m%d')}"
+            data = self._request_data(url)
+            content[current_date] = self._parse_data(data, currencies)
+            current_date += timedelta(days=1)
+        return content
+
+    def _request_data(self, url):
+        try:
+            return requests.request("GET", url, timeout=10)
+        except Exception as e:
+            raise UserError(
+                _("Couldn't fetch data. Please contact your administrator.")
+            ) from e
+
+    def _parse_data(self, data, currencies):
+        result = {}
+        root = ET.fromstring(data.content)
+        namespace = {"ns": "https://www.backend-rates.ezv.admin.ch/xmldaily"}
+        for devise in root.findall("ns:devise", namespace):
+            currency_code = devise.get("code").upper()
+            if currency_code in currencies:
+                rate = devise.find("ns:kurs", namespace).text
+                div = devise.find("ns:waehrung", namespace).text
+                div_list = div.split(" ")
+                divisor = int(div_list[0])
+                rate_float = float(rate)
+                result[currency_code] = str(rate_float / divisor)
+        return result

currency_rate_update_fta/readme/CONFIGURE.rst

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+Now you can choose the swiss service when configuring
+a currency rates providers.
+
+#. Go to *Invoicing > Configuration > Currency Rates Providers*.
+#. Create a new 'Currency Rates Providers' or edit an existing
+   one and you will see Federal Tax Administration among the available
+   'Source Services' to choose.
+#. If you choose Federal Tax Administration as a 'Source Service', the exchange rates
+   will be updated from that provider.

currency_rate_update_fta/readme/CONTRIBUTORS.rst

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+* `Openindustry <https://openindustry.it>`_:
+
+  * Andrea Piovesana

currency_rate_update_fta/readme/DESCRIPTION.rst

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+This module adds Federal Tax Administration currency exchange rates provider.
+https://www.backend-rates.bazg.admin.ch/api/xmldaily