unresolved react/nextjs patterns

[fayekelmith]

stores; Zustand stores

// store/simulationStore.ts
import { create } from 'zustand'

interface SimulationStore {
  simulation: Simulation | null
  addClusterForce: () => void
  removeForce: (id: string) => void
}

export const useSimulationStore = create<SimulationStore>((set) => ({
  simulation: null,
  addClusterForce: () => {
    set((state) => ({
      simulation: state.simulation?.addForce('cluster')
    }))
  },
  removeForce: (id: string) => {
    set((state) => ({
      simulation: state.simulation?.removeForce(id)
    }))
  }
}))

// test/simulation.test.ts
describe('Simulation Store', () => {
  it('should add cluster force', () => {
    const store = useSimulationStore.getState()
    store.simulation = mockSimulation
    
    store.addClusterForce()  // ← UNRESOLVED: store.addClusterForce -[CALLS]-> addClusterForce
    
    expect(store.simulation.forces).toContain('cluster')
  })
})

Example:

[fayekelmith]

Context Hook Patterns

// context/AuthContext.tsx
interface AuthContextType {
  user: User | null
  login: (credentials: Credentials) => Promise<void>
  logout: () => void
  refreshToken: () => Promise<void>
}

export const AuthContext = createContext<AuthContextType>(null!)

export function useAuth() {
  return useContext(AuthContext)
}

// components/LoginForm.tsx
export function LoginForm() {
  const auth = useAuth()  // ← auth is a variable holding AuthContextType
  
  const handleSubmit = async (data: Credentials) => {
    await auth.login(data)  // ← UNRESOLVED: auth.login -[CALLS]-> login
    auth.refreshToken()     // ← UNRESOLVED: auth.refreshToken -[CALLS]-> refreshToken
  }
  
  return <form onSubmit={handleSubmit}>...</form>
}

// test/LoginForm.test.tsx
it('calls login on submit', () => {
  const mockAuth = useAuth()
  
  fireEvent.click(submitButton)
  
  expect(mockAuth.login).toHaveBeenCalled()  // ← UNRESOLVED: Can't trace test -> login
})

This one rather uses NESTED_IN example:

[fayekelmith]

Custom Hooks returning objects

// hooks/useMutation.ts
interface MutationResult<T> {
  mutate: (data: T) => Promise<void>
  reset: () => void
  isLoading: boolean
}

export function useMutation<T>(endpoint: string): MutationResult<T> {
  const [isLoading, setIsLoading] = useState(false)
  
  const mutate = async (data: T) => {
    setIsLoading(true)
    await fetch(endpoint, { method: 'POST', body: JSON.stringify(data) })
    setIsLoading(false)
  }
  
  const reset = () => {
    setIsLoading(false)
  }
  
  return { mutate, reset, isLoading }
}

// components/UserForm.tsx
export function UserForm() {
  const mutation = useMutation<UserData>('/api/users')
  
  const handleSave = () => {
    mutation.mutate({ name: 'John' })  // ← UNRESOLVED: mutation.mutate -[CALLS]-> mutate
    mutation.reset()                   // ← UNRESOLVED: mutation.reset -[CALLS]-> reset
  }
  
  return <button onClick={handleSave}>Save</button>
}

we don't have this pattern on Hive but it's quite popular

[fayekelmith]

Chained API Client Pattern

// lib/apiClient.ts
class UsersAPI {
  async get(id: string) {
    return fetch(`/api/users/${id}`)
  }
  
  async list() {
    return fetch('/api/users')
  }
  
  async delete(id: string) {
    return fetch(`/api/users/${id}`, { method: 'DELETE' })
  }
}

class PostsAPI {
  async get(id: string) {
    return fetch(`/api/posts/${id}`)
  }
}

class APIClient {
  users = new UsersAPI()
  posts = new PostsAPI()
}

export const api = new APIClient()

// components/UserList.tsx
export function UserList() {
  useEffect(() => {
    api.users.list()    // ← UNRESOLVED: api.users.list -[CALLS]-> list
    api.posts.get('1')  // ← UNRESOLVED: api.posts.get -[CALLS]-> get
  }, [])
  
  const handleDelete = (id: string) => {
    api.users.delete(id)  // ← UNRESOLVED: api.users.delete -[CALLS]-> delete
  }
}

We do not have this pattern on Hive too, but it's common in some production repos

[fayekelmith]

Destructured Methods from Hooks

// hooks/useStore.ts
export function useStore() {
  const [state, setState] = useState({})
  
  const addForce = () => {
    setState({ force: 'cluster' })
  }
  
  const removeForce = () => {
    setState({})
  }
  
  return { addForce, removeForce, state }
}

// test/useStore.test.ts
describe('useStore', () => {
  it('adds force', () => {
    const { addForce, removeForce } = useStore()
    
    addForce()      // ← PARTIALLY WORKS: Direct call might resolve via imports
    removeForce()   // ← But if destructured from state, it won't
  })
})

// But this case fails:
it('adds force via store object', () => {
  const store = useStore()
  
  store.addForce()     // ← UNRESOLVED: store.addForce -[CALLS]-> addForce
  store.removeForce()  // ← UNRESOLVED: store.removeForce -[CALLS]-> removeForce
})

In hive the only relationship we have in this case is that they are nested... there which isn't accounted for when looking at test calls.

[fayekelmith]

Class Instance - Mostly for Nodejs

// services/DataProcessor.ts
export class DataProcessor {
  transform(data: RawData): ProcessedData {
    return this.normalize(data)
  }
  
  private normalize(data: RawData): ProcessedData {
    return { ...data, normalized: true }
  }
  
  validate(data: ProcessedData): boolean {
    return data.normalized === true
  }
}

// test/DataProcessor.test.ts
describe('DataProcessor', () => {
  it('transforms and validates data', () => {
    const processor = new DataProcessor()  // ← processor is lowercase variable
    
    const result = processor.transform(rawData)  // ← UNRESOLVED: processor.transform -[CALLS]-> transform
    const isValid = processor.validate(result)   // ← UNRESOLVED: processor.validate -[CALLS]-> validate
    
    expect(isValid).toBe(true)
  })
})

This pattern is non-react but can be used to build services for NextJs servers endpoints

[fayekelmith]

React Queries

// hooks/useUserQuery.ts
export function useUserQuery(userId: string) {
  const fetchUser = async () => {
    return fetch(`/api/users/${userId}`).then(r => r.json())
  }
  
  const refetch = () => {
    return fetchUser()
  }
  
  return useQuery(['user', userId], fetchUser, { refetch })
}

// components/UserProfile.tsx
export function UserProfile({ userId }: Props) {
  const query = useUserQuery(userId)
  
  const handleRefresh = () => {
    query.refetch()  // ← UNRESOLVED: query.refetch -[CALLS]-> refetch
  }
  
  return <button onClick={handleRefresh}>Refresh</button>
}

[fayekelmith]

Singleton Service Pattern

// services/analytics.ts
class AnalyticsService {
  track(event: string, data?: any) {
    console.log('Track:', event, data)
  }
  
  identify(userId: string) {
    console.log('Identify:', userId)
  }
  
  page(name: string) {
    console.log('Page:', name)
  }
}

export const analytics = new AnalyticsService()

// pages/HomePage.tsx
export function HomePage() {
  useEffect(() => {
    analytics.page('Home')        // ← UNRESOLVED: analytics.page -[CALLS]-> page
    analytics.track('view_home')  // ← UNRESOLVED: analytics.track -[CALLS]-> track
  }, [])
  
  const handleClick = () => {
    analytics.track('click_button', { button: 'cta' })  // ← UNRESOLVED
  }
}