@kingstinct/react-native-healthkit/lib/module/utils/subscribeToQuantitySamples.js

React Native bindings for HealthKit

import { QuantityTypes } from '../modules';
import { subscribeToChanges } from './subscribeToChanges';
export const subscribeToQuantitySamples = (identifier, callback, after = new Date()) => {
    return subscribeToChanges(identifier, async ({ errorMessage }) => {
        if (errorMessage) {
            return callback({
                typeIdentifier: identifier,
                errorMessage,
            });
        }
        const samplesAfterLast = await QuantityTypes.queryQuantitySamples(identifier, {
            limit: 0,
            filter: {
                date: {
                    startDate: after,
                },
            },
        });
        if (samplesAfterLast.length > 0) {
            callback({
                typeIdentifier: identifier,
                samples: samplesAfterLast,
            });
        }
    });
};