Function parseFrame

websockets/next-chat/lib/protocol.ts:52–63

(raw: unknown)

/** Parse an incoming WebSocket payload into a typed frame, or null if invalid. */
export function parseFrame<T extends { type: string }>(raw: unknown): T | null {
  if (typeof raw !== 'string') return null
  try {
    const obj = JSON.parse(raw)
    if (obj && typeof obj === 'object' && typeof obj.type === 'string') {
      return obj as T
    }
  } catch {
    /* malformed JSON — ignore */
  }
  return null
}