private static void TestUserDB() { Console.WriteLine("It works!"); var db = new UserDBHelper(); { bool run = true; while (run) { Console.WriteLine( "1. Add user\n" + "2. Remove user by id\n" + "3. Add to friends\n" + "4. Remove from friends\n" + "5. Print users\n" + "6. Print relations\n" + "7. Print user info"); var key = Console.ReadKey().Key; Console.WriteLine(); switch (key) { case ConsoleKey.D1: { Console.WriteLine(); RandomUserRegistration(db.RegisterUserToTable, db.RemoveUserByIdFromTable, db.FindUserByNickname); break; } case ConsoleKey.D2: { Console.WriteLine(); System.Int32 id; Console.Write("Write id to delete: "); var idStr = Console.ReadLine(); if (Int32.TryParse(idStr, out id)) { db.RemoveUserByIdFromTable(id); } break; } case ConsoleKey.D3: { Int32 thisIdInt; Int32 idToAddInt; Console.Write("Write userid [who want to add]: "); string thisIdString = Console.ReadLine(); if (thisIdString.Length > 0) { if (Int32.TryParse(thisIdString, out thisIdInt)) { Console.Write("Write userid [whom want to add]: "); string idToAddString = Console.ReadLine(); if (idToAddString.Length > 0) { if (Int32.TryParse(idToAddString, out idToAddInt)) { if (thisIdInt != 0 && idToAddInt != 0) { db.AddUserToFriends(thisIdInt, idToAddInt); } } else { Console.WriteLine($"Can't pasrse idToAddString: {idToAddString}"); } } } else { Console.WriteLine($"Can't pasrse thisIdString: {thisIdString}"); } } break; } case ConsoleKey.D4: { Int32 thisIdInt; Int32 idToRemoveInt; Console.Write("Write userid [who want to remove]: "); string thisIdString = Console.ReadLine(); if (thisIdString.Length > 0) { if (Int32.TryParse(thisIdString, out thisIdInt)) { Console.Write("Write userid [whom want to remove]: "); string idToRemoveString = Console.ReadLine(); if (idToRemoveString.Length > 0) { if (Int32.TryParse(idToRemoveString, out idToRemoveInt)) { if (thisIdInt != 0 && idToRemoveInt != 0) { db.RemoveUserFromFriends(thisIdInt, idToRemoveInt); } } else { Console.WriteLine($"Can't pasrse idToAddString: {idToRemoveString}"); } } } else { Console.WriteLine($"Can't pasrse thisIdString: {thisIdString}"); } } break; } case ConsoleKey.D5: { Console.Clear(); Console.WriteLine("Users:"); var usersList = db.GetAllUsers(); foreach (var el in usersList) { Console.WriteLine($"{el.UserId} {el.FullName} {el.Nickname} {el.Email}"); } break; } case ConsoleKey.D6: { Console.Clear(); Console.WriteLine("\nRelations:"); var friends = db.GetUsersFriendsTable(1); Console.WriteLine("Frineds: "); foreach (var friend in friends) { Console.WriteLine($"{friend.UserId} - {friend.FriendId}"); } var followers = db.GetUsersFollowersTable(1); Console.WriteLine("Followers: "); foreach (var follower in followers) { Console.WriteLine($"{follower.UserId} - {follower.FollowerId}"); } var followings = db.GetUsersFollowingsTable(1); Console.WriteLine("Followings: "); foreach (var following in followings) { Console.WriteLine($"{following.UserId} - {following.FollowingId}"); } Console.WriteLine(); break; } case ConsoleKey.D7: { var usersInfo = db.GetAllUsersInfo(); //foreach (var user in usersInfo) //{ // Console.WriteLine($"{user.Nickname} {user.UserId} {user.CoreId}"); //} break; } case ConsoleKey.C: { Console.Clear(); break; } case ConsoleKey.Escape: { run = false; break; } default: { break; } } } } }