Pseudo Gateway App code

pseudo-gateway-app.js

// If senderId does not exist in the members object mapping, add it with an empty array of messages
const addIfNotInNetwork = (members, senderId) => members[senderId] ? members : {
  ...members,
  [senderId]: []
}

const loraMagicSend = () => {
 // Send the message off over LoRa... 
}

const getResponse = (members, senderId) => {
  // We know that members[senderId] is an array by construction
  const [response] = members[senderId];
  if (response === undefined) return SPECIAL_NO_MESSAGES_CONSTANT;
  // I'm just copying the members to a new object - I'm used to working in React with no-param-reassign (props = true)
  const updatedMembers = {...members};
  // Remove that first message
  updatedMembers[senderId].shift();
  return updatedMembers;
}

const receiveMessage = (members, incomingSenderId, msg) => {
  // First add the sender to the list of members if they do not exist
  addIfNotInNetwork(members, incomingSenderId);
  loraMagicSend(getResponse(members, incomingSenderId));
  // Send a response t
  // For each member, append the message to the individual's queue
  return Object.entries(members).reduce((accObj, [memberId, messages]) => 
                                        ({ ...accObj, [senderId]: [...messages, msg] }), {});
}