teetopia/server/Library/SessionRetriever.cs

using System.Text.Json;
using System;
using System.Collections.Generic;

namespace gameapi.Library
{
	public class SessionRetriever
    {
        public SessionRetriever()
        {
            this.jsonFileReader = new JsonFileReader();
        }

        private JsonFileReader jsonFileReader;

        public dynamic GetValid(string token)
        {
            var sessionData = this.jsonFileReader.ReadGameData($"sessions/{token}.json");
            var dateProp = sessionData.GetProperty("validUntil").ToString();
			var date = DateTime.Parse(dateProp.ToString());
			if(DateTime.Now > date) {
				throw new Exception("Session expired.");
			}
            return sessionData;
        }

        private List<User> GetUsers()
		{
			JsonElement usersProp = this.jsonFileReader.ReadGameData("users.json");
			List<User> users = new List<User>();
			foreach (JsonElement userElem in usersProp.EnumerateArray())
			{
				var userToAdd = User.Parse(userElem);
				users.Add(userToAdd);
			}
			return users;
		}

        public User GetUserByToken(string token) {
            var sessionData = this.GetValid(token);
            List<User> users = this.GetUsers();
            User existingUser = users.Find(x => x.email == sessionData.GetProperty("email").ToString());
            if(existingUser == null) {
                throw new Exception("User not found.");
            }
            return existingUser;
        }
    }
}