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# SPDX-License-Identifier: AGPL-3.0-or-later
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import unicodedata
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import re
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from searx.data import CURRENCIES
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from .online import OnlineProcessor
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parser_re = re.compile('.*?(\\d+(?:\\.\\d+)?) ([^.0-9]+) (?:in|to) ([^.0-9]+)', re.I)
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def normalize_name(name):
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name = name.lower().replace('-', ' ').rstrip('s')
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name = re.sub(' +', ' ', name)
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return unicodedata.normalize('NFKD', name).lower()
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def name_to_iso4217(name):
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global CURRENCIES
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name = normalize_name(name)
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currency = CURRENCIES['names'].get(name, [name])
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return currency[0]
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def iso4217_to_name(iso4217, language):
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global CURRENCIES
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return CURRENCIES['iso4217'].get(iso4217, {}).get(language, iso4217)
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class OnlineCurrencyProcessor(OnlineProcessor):
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engine_type = 'online_currency'
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def get_params(self, search_query, engine_category):
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params = super().get_params(search_query, engine_category)
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if params is None:
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return None
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m = parser_re.match(search_query.query)
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if not m:
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return None
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amount_str, from_currency, to_currency = m.groups()
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try:
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amount = float(amount_str)
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except ValueError:
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return None
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from_currency = name_to_iso4217(from_currency.strip())
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to_currency = name_to_iso4217(to_currency.strip())
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params['amount'] = amount
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params['from'] = from_currency
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params['to'] = to_currency
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params['from_name'] = iso4217_to_name(from_currency, 'en')
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params['to_name'] = iso4217_to_name(to_currency, 'en')
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return params
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