constraints.js

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

const { creator, resolver } = require('@microsoft/recognizers-text-data-types-timex-expression');

// The TimexRangeResolved can be used in application logic to apply constraints to a set of TIMEX expressions.
// The constraints themselves are TIMEX expressions. This is designed to appear a little like a database join,
// of course its a little less generic than that because dates can be complicated things.

module.exports.examples = () => {
    // When you give the recognzier the text "Wednesday 4 o'clock" you get these distinct TIMEX values back.
    // But our bot logic knows that whatever the user says it should be evaluated against the constraints of
    // a week from today with respect to the date part and in the evening with respect to the time part.
    const resolutions = resolver.evaluate(
        ['XXXX-WXX-3T04', 'XXXX-WXX-3T16'],
        [creator.weekFromToday(), creator.evening]
    );

    const today = new Date();

    resolutions.forEach(resolution => {
        console.log(resolution.toNaturalLanguage(today));
    });
};