manifold/web/hooks/use-contract.ts

import { useEffect, useState } from 'react'
import { Contract, listenForContract } from 'web/lib/firebase/contracts'
import { useStateCheckEquality } from './use-state-check-equality'

export const useContract = (contractId: string) => {
  const [contract, setContract] = useState<Contract | null | 'loading'>(
    'loading'
  )

  useEffect(() => {
    if (contractId) return listenForContract(contractId, setContract)
  }, [contractId])

  return contract
}

export const useContractWithPreload = (initial: Contract | null) => {
  const [contract, setContract] = useStateCheckEquality<Contract | null>(
    initial
  )
  const contractId = initial?.id

  useEffect(() => {
    if (contractId) return listenForContract(contractId, setContract)
  }, [contractId, setContract])

  return contract
}