graphql-yoga/esm/plugins/useResultProcessor.js

import { isAsyncIterable } from '@envelop/core';
import { getMediaTypesForRequestInOrder, isMatchingMediaType, } from './resultProcessor/accept.js';
export function useResultProcessors(resultProcessors) {
    return {
        onResultProcess({ request, result, acceptableMediaTypes, setResultProcessor, }) {
            const requestMediaTypes = getMediaTypesForRequestInOrder(request);
            for (const requestMediaType of requestMediaTypes) {
                for (const resultProcessorConfig of resultProcessors) {
                    if (isAsyncIterable(result) &&
                        resultProcessorConfig.noAsyncIterable) {
                        continue;
                    }
                    const processorMediaTypesInOrder = [
                        ...resultProcessorConfig.mediaTypes,
                    ].reverse();
                    for (const processorMediaType of processorMediaTypesInOrder) {
                        acceptableMediaTypes.push(processorMediaType);
                        if (isMatchingMediaType(processorMediaType, requestMediaType)) {
                            setResultProcessor(resultProcessorConfig.processResult, processorMediaType);
                        }
                    }
                }
            }
        },
    };
}