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# SPDX-License-Identifier: AGPL-3.0-or-later
"""Processors for engine-type: ``online_currency``
"""
import unicodedata
import re
from searx.data import CURRENCIES
from .online import OnlineProcessor
parser_re = re.compile('.*?(\\d+(?:\\.\\d+)?) ([^.0-9]+) (?:in|to) ([^.0-9]+)', re.I)
def normalize_name(name):
name = name.lower().replace('-', ' ').rstrip('s')
name = re.sub(' +', ' ', name)
return unicodedata.normalize('NFKD', name).lower()
def name_to_iso4217(name):
name = normalize_name(name)
currency = CURRENCIES['names'].get(name, [name])
if isinstance(currency, str):
return currency
return currency[0]
def iso4217_to_name(iso4217, language):
return CURRENCIES['iso4217'].get(iso4217, {}).get(language, iso4217)
class OnlineCurrencyProcessor(OnlineProcessor):
"""Processor class used by ``online_currency`` engines."""
engine_type = 'online_currency'
def get_params(self, search_query, engine_category):
"""Returns a set of :ref:`request params <engine request online_currency>`
or ``None`` if search query does not match to :py:obj:`parser_re`."""
params = super().get_params(search_query, engine_category)
if params is None:
return None
m = parser_re.match(search_query.query)
if not m:
return None
amount_str, from_currency, to_currency = m.groups()
try:
amount = float(amount_str)
except ValueError:
return None
from_currency = name_to_iso4217(from_currency.strip())
to_currency = name_to_iso4217(to_currency.strip())
params['amount'] = amount
params['from'] = from_currency
params['to'] = to_currency
params['from_name'] = iso4217_to_name(from_currency, 'en')
params['to_name'] = iso4217_to_name(to_currency, 'en')
return params
def get_default_tests(self):
tests = {}
tests['currency'] = {
'matrix': {'query': '1337 usd in rmb'},
'result_container': ['has_answer'],
}
return tests
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