import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';

const MEMBER_DETAILS = gql`
  query Member {
    member {
      name
      role
      session @client {
        isLoggedIn
        connectionCount
        errors
      }
    }
  }
`;

const client = new ApolloClient({
  link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
  cache: new InMemoryCache(),
  resolvers: {
    Member: {
      session() {
        return {
          __typename: 'Session',
          isLoggedIn: someInternalLoginVerificationFunction(),
          connectionCount: calculateOpenConnections(),
          errors: sessionError(),
        };
      }
    }
  },
});

import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';

const MEMBER_DETAILS = gql`
  query Member {
    member {
      name
      role
      isLoggedIn @client
    }
  }
`;

const client = new ApolloClient({
  link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
  cache: new InMemoryCache(),
  resolvers: {
    Member: {
      isLoggedIn() {
        return someInternalLoginVerificationFunction();
      }
    }
  },
});

// ... run the query using client.query, the <Query /> component, etc.

import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';

const query = gql`
  query CurrentAuthorPostCount($authorId: Int!) {
    currentAuthorId @client @export(as: "authorId")
    postCount(authorId: $authorId)
  }
`;

const cache = new InMemoryCache();
const client = new ApolloClient({
  link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
  cache,
  resolvers: {},
});

cache.writeQuery({
  query: gql`query GetCurrentAuthorId { currentAuthorId }`,
  data: {
    currentAuthorId: 12345,
  },
});

// ... run the query using client.query, the <Query /> component, etc.

import { ApolloClient, InMemoryCache, HttpLink, gql } from '@apollo/client';

const query = gql`
  query CurrentAuthorPostCount($authorId: Int!) {
    currentAuthor @client {
      name
      authorId @export(as: "authorId")
    }
    postCount(authorId: $authorId)
  }
`;

const cache = new InMemoryCache();
const client = new ApolloClient({
  link: new HttpLink({ uri: 'http://localhost:4000/graphql' }),
  cache,
  resolvers: {},
});

cache.writeQuery({
  query: gql`
    query GetCurrentAuthor {
      currentAuthor {
        name
        authorId
      }
    }
  `,
  data: {
    currentAuthor: {
      __typename: 'Author',
      name: 'John Smith',
      authorId: 12345,
    },
  },
});

// ... run the query using client.query, the <Query /> component, etc.

import { ApolloClient, InMemoryCache, gql } from '@apollo/client';

const typeDefs = gql`
  extend type Query {
    isLoggedIn: Boolean!
    cartItems: [Launch]!
  }

  extend type Launch {
    isInCart: Boolean!
  }

  extend type Mutation {
    addOrRemoveFromCart(id: ID!): [Launch]
  }
`;

const client = new ApolloClient({
  cache: new InMemoryCache(),
  uri: 'http://localhost:4000/graphql',
  typeDefs,
});