/// <summary>
/// Updates the ZoneConcurrentList for UserSession's zone-enter and zone-last-seen timestamps
/// </summary>
/// <returns></returns>
private async Task UpdateZoneConcurrentListAsync()
{
try
{
bool isDataModified = false;
_zoneConcurrentList = await _dataClient?.TransientData?.ObtainZoneConcurrentListAsync();
if (_zoneConcurrentList != null)
{
// Retrieve the User's respective UserSession
var userSession = _zoneConcurrentList.ObtainZoneSession(_locationDevice.ZoneID.Value)?.UserConcurrentList?.ObtainUserSession(_userID.Value);
if (userSession != null)
{
userSession.EnteredIntoZoneAt = userSession.EnteredIntoZoneAt ?? DateTime.UtcNow;
userSession.LastSeenInZoneAt = DateTime.UtcNow;
isDataModified = true;
}
}
if (isDataModified)
{
// Save the updated UserSessions
await _dataClient.TransientData.SaveZoneConcurrentListAsync();
Context.Logger.LogLine("UserSessions updated");
}
}
catch (Exception ex)
{
Context.Logger.LogLine("ZoneConcurrentList ERROR: " + ex.Message);
}
}
private void ResetDataMembers()
{
_userID = null;
_dataClient = null;
_locationDevice = null;
_displayConcurrentList = null;
_zoneConcurrentList = null;
}
/// <summary>
/// Flushes ZoneConcurrentList
/// </summary>
/// <param name="dataClientConfig"></param>
private async Task FlushZoneConcurrentListAsync()
{
try
{
bool isDataModified = false;
_zoneConcurrentList = await _dataClient?.TransientData?.ObtainZoneConcurrentListAsync();
if (_zoneConcurrentList?.ZoneSessions?.Any() ?? false)
{
// Traverse through all ZoneSessions in ZoneConcurrentList
foreach (ZoneSession zoneSession in _zoneConcurrentList.ZoneSessions)
{
if (zoneSession?.UserConcurrentList != null)
{
// Flush the UserConcurrentList's UserSessions
UserConcurrentList userConcurrentList = zoneSession.UserConcurrentList;
if (userConcurrentList.UserSessions?.Any() ?? false)
{
List <UserSession> userSessionsToRemove = new List <UserSession>();
// Traverse through all UserSessions in UserConcurrentList
foreach (UserSession userSession in userConcurrentList.UserSessions)
{
if (userSession != null)
{
if (userSession.LastSeenInZoneAt != null)
{
// Remove UserSession from the Zone if the combination of the time the User is last seen in the Zone and
// UserSession zone-timeout threshold is lesser than current time
var combinedTs = userSession.LastSeenInZoneAt.Value.AddSeconds(Config.UserSessionZoneTimeoutThreshold).ToUniversalTime();
if (combinedTs < DateTime.UtcNow)
{
userSessionsToRemove.Add(userSession);
}
}
else
{
userSessionsToRemove.Add(userSession);
}
}
}
// Removing UserSessions from the UserConcurrentList
if (userSessionsToRemove.Any())
{
foreach (UserSession userSessionToRemove in userSessionsToRemove)
{
userConcurrentList.UserSessions.Remove(userSessionToRemove);
}
userConcurrentList.LastFlushedAt = DateTime.UtcNow;
isDataModified = true;
}
}
}
}
}
if (isDataModified)
{
// Save the updated ZoneConcurrentList
await _dataClient.TransientData.SaveZoneConcurrentListAsync();
Context.Logger.LogLine("ZoneConcurrentList updated");
}
}
catch (Exception ex)
{
Context.Logger.LogLine("ZoneConcurrentList ERROR: " + ex.Message);
}
}
private void ResetDataMembers()
{
_dataClient = null;
_zoneConcurrentList = null;
}