graphql-redis-subscriptions/dist/with-filter.js

A graphql-subscriptions PubSub Engine using redis

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.withFilter = void 0;
const withFilter = (asyncIteratorFn, filterFn) => {
    return (rootValue, args, context, info) => {
        const asyncIterator = asyncIteratorFn();
        const getNextPromise = () => {
            return asyncIterator
                .next()
                .then(payload => Promise.all([
                payload,
                Promise.resolve(filterFn(payload.value, args, context, info)).catch(() => false),
            ]))
                .then(([payload, filterResult]) => {
                if (filterResult === true) {
                    return payload;
                }
                return getNextPromise();
            });
        };
        return {
            next() {
                return getNextPromise();
            },
            return() {
                return asyncIterator.return();
            },
            throw(error) {
                return asyncIterator.throw(error);
            },
            [Symbol.asyncIterator]() {
                return this;
            },
        };
    };
};
exports.withFilter = withFilter;
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