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import { Application, Router } from 'https://deno.land/x/oak@v7.3.0/mod.ts';// Currently the way helix exports graphiql doesn't work in deno, so we import the other parts directly, and import a very simple playground file from a gist.import { shouldRenderGraphiQL } from 'https://cdn.jsdelivr.net/gh/contrawork/graphql-helix@master/packages/deno/should-render-graphiql.ts';import { processRequest } from 'https://cdn.jsdelivr.net/gh/contrawork/graphql-helix@master/packages/deno/process-request.ts';import { getGraphQLParameters } from 'https://cdn.jsdelivr.net/gh/contrawork/graphql-helix@master/packages/deno/get-graphql-parameters.ts';import playground from 'https://gist.githubusercontent.com/hayes/5c99f7b4f71234452036fd88e142a825/raw/655245a052b10c2912a803c8a6d537096b73c10b/playground.ts';// Pothosimport SchemaBuilder from './packages/core/mod.ts';
// Create app and routerconst app = new Application();const router = new Router();
// Create a very simple schemaconst builder = new SchemaBuilder({});
builder.queryType({  fields: (t) => ({    hello: t.string({      args: {        name: t.arg.string({}),      },      resolve: (parent, { name }) => `hello, ${name || 'World'}`,    }),  }),});
const schema = builder.toSchema();
// Mount a route to serve the graphql API and playgroundrouter.all('/graphql', async (context) => {  // parse request  const request = {    body: await context.request.body({}).value,    headers: context.request.headers,    method: context.request.method,    query: context.request.url.searchParams,  };
  if (shouldRenderGraphiQL(request)) {    context.response.body = playground({ endpoint: 'localhost:8080/graphql' });
    return;  }  // Extract the GraphQL parameters from the request  const { operationName, query, variables } = getGraphQLParameters(request);
  // Validate and execute the query  const result = await processRequest({    operationName,    query,    variables,    request,    schema,  });
  if (result.type === 'RESPONSE') {    // We set the provided status and headers and just the send the payload back to the client    result.headers.forEach(({ name, value }) => context.response.headers.set(name, value));
    context.response.status = result.status;    context.response.body = result.payload;  } else {    // Omitting other response types for brevity, see graphql-helix docs for more a complete implementation    throw new Error('Unsupported result type');  }});
app.use(router.routes());app.use(router.allowedMethods());
console.log('Go to http://localhost:8080/graphql to open the playground');await app.listen({ port: 8080 });