@graphql-mesh/graphql/index.cjs.js

'use strict';

const fetchache = require('fetchache');
const urlLoader = require('@graphql-tools/url-loader');
const graphql = require('graphql');
const wrap = require('@graphql-tools/wrap');
const utils = require('@graphql-mesh/utils');

class GraphQLHandler {
    constructor({ name, config, cache }) {
        this.name = name;
        this.config = config;
        this.cache = cache;
    }
    async getMeshSource() {
        const urlLoader$1 = new urlLoader.UrlLoader();
        const customFetch = (...args) => fetchache.fetchache(args[0] instanceof fetchache.Request ? args[0] : new fetchache.Request(...args), this.cache);
        const getExecutorAndSubscriberForParams = (params, headersFactory) => {
            const resolverData = {
                root: {},
                args: params.variables,
                context: params.context,
            };
            const headers = utils.getHeadersObject(headersFactory(resolverData));
            return urlLoader$1.getExecutorAndSubscriber(this.config.endpoint, {
                customFetch: customFetch,
                ...this.config,
                headers,
            });
        };
        let schema;
        const schemaHeadersFactory = utils.getInterpolatedHeadersFactory(this.config.schemaHeaders);
        if (this.config.introspection) {
            const result = await urlLoader$1.handleSDL(this.config.introspection, {
                customFetch: customFetch,
                ...this.config,
                headers: this.config.schemaHeaders,
            });
            schema = result.schema;
        }
        else if (this.config.cacheIntrospection) {
            const cacheKey = this.name + '_introspection';
            const introspectionData = await this.cache.get(cacheKey);
            if (introspectionData) {
                schema = graphql.buildClientSchema(introspectionData);
            }
            else {
                schema = await wrap.introspectSchema(async (params) => {
                    const { executor } = await getExecutorAndSubscriberForParams(params, schemaHeadersFactory);
                    return executor(params);
                });
                const ttl = typeof this.config.cacheIntrospection === 'object' && this.config.cacheIntrospection.ttl;
                const introspection = graphql.introspectionFromSchema(schema);
                this.cache.set(cacheKey, introspection, { ttl });
            }
        }
        else {
            schema = await wrap.introspectSchema(async (params) => {
                const { executor } = await getExecutorAndSubscriberForParams(params, schemaHeadersFactory);
                return executor(params);
            });
        }
        const operationHeadersFactory = utils.getInterpolatedHeadersFactory(this.config.operationHeaders);
        return {
            schema,
            executor: async (params) => {
                const { executor } = await getExecutorAndSubscriberForParams(params, operationHeadersFactory);
                return executor(params);
            },
            subscriber: async (params) => {
                const { subscriber } = await getExecutorAndSubscriberForParams(params, operationHeadersFactory);
                return subscriber(params);
            },
        };
    }
}

module.exports = GraphQLHandler;
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