maticzav

// Standalone
import { applyMiddleware } from 'graphql-middleware'

const schemaWithMiddleware = applyMiddleware(
  schema,
  metricsMiddleware,
  authMiddleware,
  beepMiddleware,
)

maticzav

const loggingMiddleware = async (resolve, parent, args, context, info) => {
  try {
    resolve()
  } catch(err) {
    report(err)
  }
}

maticzav

const loggingMiddleware = {
  Query: async (resolve, parent, args, context, info) => {
    try {
      resolve()
    } catch(err) {
      report(err)
    }
  },
}

maticzav

const loggingMiddleware = {
  Query: {
    foo: async (resolve, parent, args, context, info) => {
      try {
        resolve()
      } catch(err) {
        report(err)
      }
    },
  },

maticzav

// src/permissions/index.ts

import { shield, and } from 'graphql-shield'
import * as rules from './rules'

export const permissions = shield({
  Query: {
    viewer: rules.isGrocer,
  },
  Mutation: {

maticzav

// src/permissions/rules.ts
import { rule, and, or, not } from 'graphql-shield'
import { Context, getUserEmail } from '../utils'

export const isGrocer = rule()(async (parent, args, ctx: Context, info) => {
  const email = getUserEmail(ctx)
  // Is there a Grocer with such email in our database (Prisma)?
  return ctx.db.exists.Grocer({ email })
})

maticzav

# src/schema.graphql

type Query {
  viewer: Viewer
  products: [Product!]!
}

type Mutation {
  addItemToBasket(productId: ID!): Viewer
  removeItemFromBasket(itemId: ID!): Viewer

maticzav

# database/datamodel.graphql

type Grocer {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!

  email: String! @unique
}

maticzav

import fetch from 'isomorphic-fetch'
import { ApolloClient } from 'apollo-client'
import { InMemoryCache } from 'apollo-cache-inmemory'
import { from, ApolloLink } from 'apollo-link'
import { createUploadLink } from 'apollo-upload-client'

let apolloClient = null

// Apollo server polyfill
if (!process.browser) {

maticzav

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