@graphql-mesh/transport-rest/esm/directives/pubsubOperation.js

import { stringInterpolator } from '@graphql-mesh/string-interpolation';
import { createGraphQLError } from '@graphql-tools/utils';
export function processPubSubOperationAnnotations({ field, globalPubsub, pubsubTopic, logger: globalLogger, }) {
    field.subscribe = function pubSubSubscribeFn(root, args, context, info) {
        const logger = context?.logger || globalLogger;
        const operationLogger = logger.child(`${info.parentType.name}.${field.name}`);
        const pubsub = context?.pubsub || globalPubsub;
        if (!pubsub) {
            return createGraphQLError(`You should have PubSub defined in either the config or the context!`);
        }
        const interpolationData = { root, args, context, info, env: process.env };
        let interpolatedPubSubTopic = stringInterpolator.parse(pubsubTopic, interpolationData);
        if (interpolatedPubSubTopic.startsWith('webhook:')) {
            const [, expectedMethod, expectedUrl] = interpolatedPubSubTopic.split(':');
            const expectedPath = new URL(expectedUrl, 'http://localhost').pathname;
            interpolatedPubSubTopic = `webhook:${expectedMethod}:${expectedPath}`;
        }
        operationLogger.debug(`${info.parentType.name}.${field.name} => Subscribing to pubSubTopic: ${interpolatedPubSubTopic}`);
        return pubsub.asyncIterator(interpolatedPubSubTopic);
    };
    field.resolve = function pubSubResolver(root, args, context, info) {
        const logger = context?.logger || globalLogger;
        const operationLogger = logger.child(`${info.parentType.name}.${field.name}`);
        operationLogger.debug('Received ', root, ' from ', pubsubTopic);
        return root;
    };
}