internal static async Task <SessionInfo> CreateOrJoinGameSession(GameSessionRequest sessionParams)
{
// find or create a game session
using (MySqlConnection conn = new MySqlConnection(_connStr))
{
await conn.OpenAsync();
using (MySqlCommand cmd = new MySqlCommand("createOrJoinGameSession", conn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new MySqlParameter("@param_player_id", sessionParams.PlayerId));
using (var cursor = await cmd.ExecuteReaderAsync())
{
cursor.Read();
var id = Convert.ToInt64(cursor["id"]);
var guid = Guid.Parse(cursor["guid"].ToString());
return(new SessionInfo
{
Id = id,
Guid = guid
});
}
}
}
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req,
[OrchestrationClient] DurableOrchestrationClient starter,
ILogger log)
{
// get request params
var postData = await req.ReadAsStringAsync();
GameSessionRequest sessionParams = null;
try
{
sessionParams = JsonConvert.DeserializeObject <GameSessionRequest>(postData);
}
catch (JsonException ex)
{
return(new BadRequestResult());
}
// get playerId
if (ValidateRequest(sessionParams))
{
log.LogInformation($"The player identifier provided is: {sessionParams.PlayerId}");
}
else
{
return(new BadRequestResult());
}
// query db to join or create session
SessionInfo sessionInfo = await DataClient.CreateOrJoinGameSession(sessionParams);
var sessionOrchestrator = await starter.GetStatusAsync(sessionInfo.Guid.ToString());
if (sessionOrchestrator == null)
{
// create session
var initialGameState = new GameSession(sessionInfo.Id, sessionInfo.Guid, sessionParams.PlayerId);
string instanceId = await starter.StartNewAsync("GameSession", sessionInfo.Guid.ToString(), initialGameState);
log.LogInformation($"Started game session for player {sessionParams.PlayerId} with ID = '{instanceId}'.");
}
else
{
// send 'player join' event to session orchestrator
await starter.RaiseEventAsync(sessionInfo.Guid.ToString(), Constants.PlayerJoinEventTag, sessionParams.PlayerId);
}
return(new OkObjectResult(starter.CreateHttpManagementPayload(sessionInfo.Guid.ToString())));
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req,
[OrchestrationClient] DurableOrchestrationClient starter,
ILogger log)
{
// get request params
var postData = await req.ReadAsStringAsync();
GameSessionRequest sessionParams = null;
try
{
sessionParams = JsonConvert.DeserializeObject <GameSessionRequest>(postData);
}
catch (JsonException ex)
{
return(new BadRequestResult());
}
// get playerId
int?playerId = null;
if (sessionParams != null)
{
playerId = sessionParams.PlayerId;
log.LogInformation($"The player identifier provided is: {playerId}");
}
else
{
return(new BadRequestResult());
}
// query db for session matching params
string matchResult = null;
if (playerId.HasValue)
{
matchResult = await DataClient.GetJoinableGameSessionGuid(playerId.Value.ToString());
}
if (matchResult == null)
{
// create session
var initialGameState = new GameSession(playerId.Value);
string instanceId = await starter.StartNewAsync("GameSession", initialGameState);
// write game to db so other players can discover it
await DataClient.AddGameSession(initialGameState, instanceId);
log.LogInformation($"Started game session for player {playerId} with ID = '{instanceId}'.");
matchResult = instanceId;
}
else
{
// send 'player join' event to session orchestrator
await starter.RaiseEventAsync(matchResult, Constants.PlayerJoinEventTag, playerId);
}
return(new OkObjectResult(matchResult));
}
public static bool ValidateRequest(GameSessionRequest req)
{
return(req != null && req.PlayerId != 0);
}
