Ocelot-Social/src/middleware/sluggifyMiddleware.js

import uniqueSlug from './slugify/uniqueSlug'

const isUniqueFor = (context, type) => {
  return async (slug) => {
    const session = context.driver.session()
    const response = await session.run(
      `MATCH(p:${type} {slug: $slug }) return p.slug`, {
        slug
      })
    session.close()
    return response.records.length === 0
  }
}

export default {
  Mutation: {
    CreatePost: async (resolve, root, args, context, info) => {
      args.slug = args.slug || await uniqueSlug(args.title, isUniqueFor(context, 'Post'))
      return resolve(root, args, context, info)
    },
    CreateUser: async (resolve, root, args, context, info) => {
      args.slug = args.slug || await uniqueSlug(args.name, isUniqueFor(context, 'User'))
      return resolve(root, args, context, info)
    },
    CreateOrganization: async (resolve, root, args, context, info) => {
      args.slug = args.slug || await uniqueSlug(args.name, isUniqueFor(context, 'Organization'))
      return resolve(root, args, context, info)
    },
    CreateCategory: async (resolve, root, args, context, info) => {
      args.slug = args.slug || await uniqueSlug(args.name, isUniqueFor(context, 'Category'))
      return resolve(root, args, context, info)
    }
  }
}