public async Task OpenDatabase(OpenDatabaseRequest request)
{
try
{
ValidateDbInput(request);
var(databaseName, changeHandler) = request;
if (!_ws.State.DbNameToHash.TryGetValue(databaseName, out var dbNameHash))
{
dbNameHash = HmacUtils.SignString(_ws.Keys.HmacKey, databaseName);
_ws.State.DbNameToHash[databaseName] = dbNameHash;
}
var newDatabaseParams = CreateDatabase(databaseName);
await OpenDatabaseInternal(dbNameHash, changeHandler, newDatabaseParams);
} catch (Exception ex) {
if (!(ex is IError e))
{
throw new UnknownServiceUnavailable(ex);
}
switch (e.Name)
{
case "ParamsMustBeObject":
case "DatabaseAlreadyOpening":
case "DatabaseNameMustBeString":
case "DatabaseNameMissing":
case "DatabaseNameCannotBeBlank":
case "DatabaseNameTooLong":
case "ChangeHandlerMissing":
case "ChangeHandlerMustBeFunction":
case "UserNotSignedIn":
case "UserNotFound":
case "TooManyRequests":
case "ServiceUnavailable":
throw;
default:
throw new UnknownServiceUnavailable(ex);
}
}
}
private void ValidateDbInput(OpenDatabaseRequest request)
{
var dbName = request.DatabaseName;
if (string.IsNullOrEmpty(dbName))
{
throw new DatabaseNameCannotBeBlank();
}
if (dbName.Length > MAX_DB_NAME_CHAR_LENGTH)
{
throw new DatabaseNameTooLong(MAX_DB_NAME_CHAR_LENGTH);
}
if (_ws.Reconnecting)
{
throw new Reconnecting();
}
if (!_ws.Keys.Init)
{
throw new UserNotSignedIn();
}
}
