result-for-host.js

"use strict"

const mongoose = require("mongoose");
const MONGO_URI = process.env.MONGO_URI;
const User = require("./models/user");
const Description = require("./models/description");

const arrName = ["animal", "emoji", "color", "first", "now"];
  
let connection = null;

const connectDB = () => {
  if (connection && mongoose.connection.readyState === 1) return;
  mongoose.connect(MONGO_URI, { }).then(
    conn => {
      connection = conn;
    }
  );
};

module.exports.handler = async (event, context) => {

  const hostId = event.pathParameters.hostId;
  const userId = event.requestContext.authorizer.lambda.userId;
  
  if(hostId != userId)
    return {
      statusCode: "403",
      body: JSON.stringify({
        "message": "User Not Allowed",
      })
    };
  
  connectDB();
  
  try{
    const hostUser = await User.findOne({ id: hostId }).populate("friends");
    
    if (hostUser.friends.length === 0) 
      return {
        statusCode: "204",
        body: JSON.stringify({
          "message" : "No Result Yet", 
          "data":{
            "image" : "000"
          }
        })
      };

    let firsts = {};
    arrName.forEach((name, idx) => {
      const arr = hostUser[name];
      const first = Math.max(...arr);
      firsts[name] = arr.indexOf(first);
    });

    const image = `${firsts["color"]}${firsts["emoji"]}${firsts["animal"]}`;
    const descData = await Description.findOne({ result: `${firsts["first"]}${firsts["now"]}` });

    const result = {
      image: image,
      title: descData.title,
      first: descData.first,
      now: descData.now,
    };
    
    return {
      statusCode: "200",
      body: JSON.stringify({
        "message": "User Results",
        "data" : result
      })
    };
	  
  } catch(err){
    console.log(err);
    return {
      statusCode: "400",
      body: JSON.stringify({
        "message": "Bad Request",
      })
    };
  }
  
};