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27 lines
847 B
27 lines
847 B
3 years ago
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from flask.views import MethodView
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from flask_smorest import Blueprint
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from marshmallow import Schema, fields
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from ..db_utils import get_forex_rate
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from .. import returns
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bp = Blueprint('forex', __name__, description='Foreign Exchange information')
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class GetExchangeResult(returns.SuccessSchema):
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rate = fields.Float(optional=True)
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@bp.get('/<from_currency>/<to_currency>')
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@bp.response(422, returns.ErrorSchema, description='Invalid currency')
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@bp.response(200, GetExchangeResult)
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def get_exchange(from_currency: str, to_currency: str):
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"""Get exchange rate between two currencies"""
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if from_currency == to_currency:
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rate = 1
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else:
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rate = get_forex_rate(from_currency, to_currency)
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if rate is None:
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return returns.abort(returns.invalid_argument('currency'))
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return returns.success(rate=rate)
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