public async Task <IActionResult> JoinZoneProximityChat([FromServices] ICharacterSessionRepository characterSessionRepository,
[FromServices] IFactoryCreatable <VivoxTokenClaims, VivoxTokenClaimsCreationContext> claimsFactory,
[FromServices] IVivoxTokenSignService signService)
{
int accountId = this.ClaimsReader.GetAccountIdInt(User);
//If the user doesn't actually have a claimed session in the game
//then we shouldn't log them into Vivox.
if (!await characterSessionRepository.AccountHasActiveSession(accountId))
{
return(BuildFailedResponseModel(VivoxLoginResponseCode.NoActiveCharacterSession));
}
int characterId = await RetrieveSessionCharacterIdAsync(characterSessionRepository, accountId);
CharacterSessionModel session = await characterSessionRepository.RetrieveAsync(characterId);
//Players in the same zone will all join the same proximity channel such as Prox-1.
//They can use this for proximity text and voice chat.
//TODO: Use a factory for channel name generation maybe?
VivoxTokenClaims claims = claimsFactory.Create(new VivoxTokenClaimsCreationContext(characterId, VivoxAction.JoinChannel, new VivoxChannelData(true, $"Prox-{session.ZoneId}")));
//We don't send it back in a JSON form even though it's technically a JSON object
//because the client just needs it as a raw string anyway to put through the Vivox client API.
return(BuildSuccessfulResponseModel(new VivoxChannelJoinResponse(signService.CreateSignature(claims), claims.DestinationSIPURI)));
}
private async Task <bool> CheckZoneAuthorizedToModifyCharacterData(int characterId)
{
if (!await CharacterSessionRepository.CharacterHasActiveSession(characterId))
{
return(false);
}
CharacterSessionModel model = await CharacterSessionRepository.RetrieveAsync(characterId);
//If they aren't in this zone we shouldn't be allowed to save it.
return(ClaimsReader.GetAccountIdInt(User) == model.ZoneId);
}
/// <inheritdoc />
public async Task <bool> TryCreateAsync(CharacterSessionModel model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
//TODO: look into transactions/locks
await Context
.CharacterSessions
.AddAsync(model);
//TODO: This can throw due to race condition
int rowChangedCount = await Context.SaveChangesAsync();
return(rowChangedCount != 0);
}
/// <inheritdoc />
public Task UpdateAsync(int key, CharacterSessionModel model)
{
GeneralGenericCrudRepositoryProvider <int, CharacterSessionModel> crudProvider = new GeneralGenericCrudRepositoryProvider <int, CharacterSessionModel>(Context.CharacterSessions, Context);
return(crudProvider.UpdateAsync(key, model));
}
public async Task<CharacterSessionEnterResponse> EnterSession([FromRoute(Name = "id")] int characterId,
[FromServices] ICharacterLocationRepository characterLocationRepository,
[FromServices] IZoneServerRepository zoneServerRepository)
{
if(!await IsCharacterIdValidForUser(characterId, CharacterRepository))
return new CharacterSessionEnterResponse(CharacterSessionEnterResponseCode.InvalidCharacterIdError);
int accountId = ClaimsReader.GetAccountIdInt(User);
//This checks to see if the account, not just the character, has an active session.
//We do this before we check anything to reject quick even though the query behind this
//may be abit more expensive
//As a note, this checks (or should) CLAIMED SESSIONS. So, it won't prevent multiple session entries for an account
//This is good because we actually use the left over session data to re-enter the instances on disconnect.
if(await CharacterSessionRepository.AccountHasActiveSession(accountId))
return new CharacterSessionEnterResponse(CharacterSessionEnterResponseCode.AccountAlreadyHasCharacterSession);
//They may have a session entry already, which is ok. So long as they don't have an active claimed session
//which the above query checks for.
bool hasSession = await CharacterSessionRepository.ContainsAsync(characterId);
//We need to check active or not
if (hasSession)
{
//It's possible that the session no longer matches the character's
//persisted location. We should check their location and put them in the correct zone.
//If it's active we can just retrieve the data and send them off on their way
CharacterSessionModel sessionModel = await CharacterSessionRepository.RetrieveAsync(characterId, true);
if (await characterLocationRepository.ContainsAsync(characterId))
{
CharacterLocationModel locationModel = await characterLocationRepository.RetrieveAsync(characterId);
//They have a location, verify it matches the session
if (locationModel.WorldId != sessionModel.ZoneEntry.WorldId)
{
//The location world and the session's world do not match, so remove the session.
await CharacterSessionRepository.TryDeleteAsync(sessionModel.CharacterId);
}
else
return new CharacterSessionEnterResponse(sessionModel.ZoneId);
}
else
//TODO: Handle case when we have an inactive session that can be claimed
return new CharacterSessionEnterResponse(sessionModel.ZoneId);
}
//If we didn't return above then we should be in a state where the below can handle this now.
try
{
int targetSessionZoneId = 0;
//TO know what zone we should connect to we need to check potential
//character location.
if (await characterLocationRepository.ContainsAsync(characterId))
{
CharacterLocationModel locationModel = await characterLocationRepository.RetrieveAsync(characterId);
//We have no session so we need to find a zone that matches this server.
ZoneInstanceEntryModel firstWithWorldId = await zoneServerRepository.FindFirstWithWorldId(locationModel.WorldId);
//TODO: Should we request one be created for the user??
//There is NO instance available for this world.
if (firstWithWorldId == null)
{
//Location is basically invalid since there is no running world
await characterLocationRepository.TryDeleteAsync(locationModel.CharacterId);
}
else
{
targetSessionZoneId = firstWithWorldId.ZoneId;
}
}
//Try to get into any zone
if (targetSessionZoneId == 0)
{
ZoneInstanceEntryModel entryModel = await zoneServerRepository.AnyAsync();
if (entryModel != null)
targetSessionZoneId = entryModel.ZoneId;
}
//Still zero means literally no zone servers are available.
if(targetSessionZoneId == 0)
return new CharacterSessionEnterResponse(CharacterSessionEnterResponseCode.GeneralServerError);
if(await CharacterSessionRepository.TryCreateAsync(new CharacterSessionModel(characterId, targetSessionZoneId)))
return new CharacterSessionEnterResponse(targetSessionZoneId);
else
return new CharacterSessionEnterResponse(CharacterSessionEnterResponseCode.GeneralServerError);
}
catch (Exception e)
{
if(Logger.IsEnabled(LogLevel.Error))
Logger.LogError($"Character with ID: {characterId} failed to create session. Potentially no default world assigned or World with session was deleted and orphaned. Reason: {e.Message}");
throw;
}
}
