firebase-functions/lib/esm/v2/providers/dataconnect/graphql.mjs

Firebase SDK for Cloud Functions

import { initV2Endpoint } from "../../../runtime/manifest.mjs";
import { convertIfPresent, convertInvoker } from "../../../common/encoding.mjs";
import { withInit } from "../../../common/onInit.mjs";
import { withErrorHandler } from "../../../common/providers/https.mjs";
import { wrapTraceContext } from "../../trace.mjs";
import { getGlobalOptions, optionsToEndpoint } from "../../options.mjs";
import express from "express";
import fs from "fs";
import { ApolloServer } from "@apollo/server";
import { expressMiddleware } from "@as-integrations/express4";

//#region src/v2/providers/dataconnect/graphql.ts
const FIREBASE_AUTH_HEADER = "X-Firebase-Auth-Token";
/** @hidden */
async function initGraphqlServer(opts) {
	if (!opts.schema && !opts.schemaFilePath || opts.schema && opts.schemaFilePath) {
		throw new Error("Exactly one of 'schema' or 'schemaFilePath' must be provided.");
	}
	if (opts.schemaFilePath) {
		opts.schema = fs.readFileSync(opts.schemaFilePath, "utf-8");
	}
	if (!opts.resolvers.query && !opts.resolvers.mutation) {
		throw new Error("At least one query or mutation resolver must be provided.");
	}
	const apolloResolvers = {};
	if (opts.resolvers.query) {
		apolloResolvers.Query = opts.resolvers.query;
	}
	if (opts.resolvers.mutation) {
		apolloResolvers.Mutation = opts.resolvers.mutation;
	}
	try {
		const serverPromise = (async () => {
			const app = express();
			const server = new ApolloServer({
				typeDefs: opts.schema,
				resolvers: apolloResolvers
			});
			await server.start();
			app.use(`/${opts.path ?? "graphql"}`, express.json(), expressMiddleware(server, { context: ({ req }) => Promise.resolve({ auth: { token: req.header(FIREBASE_AUTH_HEADER) } }) }));
			return app;
		})();
		return serverPromise;
	} catch (e) {
		if (e instanceof Error) {
			throw new Error("Error initializing GraphQL server: " + e.message);
		} else {
			throw e;
		}
	}
}
/**
* @hidden
* Handles HTTPS GraphQL requests.
* @param {GraphqlServerOptions} opts - Options for configuring the GraphQL server.
* @returns {HttpsFunction} A function you can export and deploy.
*/
function onGraphRequest(opts) {
	let serverPromise = null;
	const handler = wrapTraceContext(withInit(withErrorHandler(async (req, res) => {
		serverPromise = serverPromise ?? initGraphqlServer(opts);
		const app = await serverPromise;
		app(req, res);
	})));
	const globalOpts = getGlobalOptions();
	const baseOpts = optionsToEndpoint(globalOpts);
	const specificOpts = optionsToEndpoint(opts);
	const endpoint = {
		...initV2Endpoint(globalOpts, opts),
		platform: "gcfv2",
		...baseOpts,
		...specificOpts,
		labels: {
			...baseOpts?.labels,
			...specificOpts?.labels
		},
		dataConnectGraphqlTrigger: {}
	};
	convertIfPresent(endpoint.dataConnectGraphqlTrigger, globalOpts, "invoker", "invoker", convertInvoker);
	convertIfPresent(endpoint.dataConnectGraphqlTrigger, opts, "invoker", "invoker", convertInvoker);
	if (opts.schemaFilePath) {
		endpoint.dataConnectGraphqlTrigger.schemaFilePath = opts.schemaFilePath;
	}
	handler.__endpoint = endpoint;
	return handler;
}

//#endregion
export { initGraphqlServer, onGraphRequest };