userHasVisitedParkOnWishlist()

function getParksByState(parks, state) {
  let parksByState = [];
  const parksFilter = parks.filter((parks) => {
    if (parks.location.state === state) {
      parksByState.push(parks);
    }
  });
  return parksByState;
}

function getWishlistParksForUser(parks, users, username) {  
  let result = parks.filter((park) => users[username].wishlist.includes(park.id))
  return result;
  
  if (!users.wishlist) return wishlistByUser;
 };

function userHasVisitedAllParksInState(parks, users, state, username) {
  const parksInState = getParksByState(parks, state);
  const parksVisitedByUser = users[username].visited;
  const parksById = parksInState.map((park) => park.id);
  let result;
  
  parksVisitedByUser.forEach((park) => {
    parksById.forEach((parkId) => {
      if(park === parkId) {
        result = true;
      } else {
        result = false;
      }
    });
  });
  return result;
}

function userHasVisitedParkOnWishlist(users, usernameOne, usernameTwo) {
  let result;
  let usernameOneV = users[usernameOne].visited;
  let usernameTwoW = users[usernameTwo].wishlist;
  
  usernameOneV.forEach((visited) => {
    usernameTwoW.forEach((wish) => {
      if (wish === visited) {
        result = true;
      } else {
        result = false;
      }
    });
  });  
 return result;
}


function getUsersForUserWishlist(users, username) {
  let usersWhoHaveVisitedParks = [];
  let userWishlist = users[username].wishlist;
  const usersName = users[username]
  
  
  for (let name in users) {
    let userVisited = users[name].visited;
    const username = name;
    
    for (let i = 0; i < userWishlist.length; i++) {
      for (let j = 0; j < userVisited.length; j++) {
         if (userWishlist[i] === userVisited[j] && !usersWhoHaveVisitedParks.includes(username)) {
           usersWhoHaveVisitedParks.push(username);
         };   
      };
    };
  };
  return usersWhoHaveVisitedParks;
  if (usersWhoHaveVisitedParks = []) {return usersWhoHaveVisitedParks};  
};