import * as Y from 'yjs'
import * as encoding from 'lib0/encoding'
import * as decoding from 'lib0/decoding'

export const messagePermissionDenied = 0

export const writePermissionDenied = (
  encoder: encoding.Encoder, 
  reason: string
): void => {
  encoding.writeVarUint(encoder, messagePermissionDenied)
  encoding.writeVarString(encoder, reason)
}

export type PermissionDeniedHandler = (
  y: Y.Doc,
  reason: string
) => void

export const readAuthMessage = (
  decoder: decoding.Decoder,
  y: Y.Doc,
  permissionDeniedHandler: PermissionDeniedHandler
): void => {
  switch (decoding.readVarUint(decoder)) {
    case messagePermissionDenied: 
      permissionDeniedHandler(y, decoding.readVarString(decoder))
  }
}