hyperident-shell / lib / messages.js

// Wire messages for the hypershell protocol — pure compact-encoding, so it
// runs unchanged on both node and bare. Ported from hypershell (shell subset).
import c from 'compact-encoding'

const stringArray = c.array(c.string)

export const handshakeSpawn = {
  preencode (state, s) {
    c.string.preencode(state, s.command || '')
    stringArray.preencode(state, s.args || [])
    c.uint.preencode(state, s.width || 0)
    c.uint.preencode(state, s.height || 0)
  },
  encode (state, s) {
    c.string.encode(state, s.command || '')
    stringArray.encode(state, s.args || [])
    c.uint.encode(state, s.width || 0)
    c.uint.encode(state, s.height || 0)
  },
  decode (state) {
    return {
      command: c.string.decode(state),
      args: stringArray.decode(state),
      width: c.uint.decode(state),
      height: c.uint.decode(state)
    }
  }
}

export const resize = {
  preencode (state, r) {
    c.uint.preencode(state, r.width || 0)
    c.uint.preencode(state, r.height || 0)
  },
  encode (state, r) {
    c.uint.encode(state, r.width || 0)
    c.uint.encode(state, r.height || 0)
  },
  decode (state) {
    return {
      width: c.uint.decode(state),
      height: c.uint.decode(state)
    }
  }
}