/// <summary>
/// Get date to print as string.
/// Time zone by user logged in.
/// It will get the logged user and then get the time-zone and then print.
/// </summary>
/// <param name="timeZone"></param>
/// <param name="dt"></param>
/// <param name="format">if format null then default format.</param>
/// <param name="addTimeZoneString">Add timezone string with Date. Eg. 26-Aug-2015 (GMT -07:00)</param>
/// <returns>Returns nice string format based on logged user's selected time zone.</returns>
public static string GetDateTime(
TimeZoneSet timeZone,
DateTime?dt,
string format = null,
bool addTimeZoneString = true)
{
if (dt == null)
{
return("");
}
var dt2 = (DateTime)dt;
if (format == null)
{
format = DateTimeFormat;
}
if (timeZone == null || !timeZone.IsTimeZoneInfoExist())
{
return(dt2.ToString(format));
}
var currentZone = timeZone.TimeZoneInfo;
//time zone found.
var newDate = TimeZoneInfo.ConvertTime(dt2, currentZone);
var additionalString = "";
if (addTimeZoneString)
{
var userZone = timeZone.UserTimezone;
additionalString = "(" + GmtConst + userZone.TimePartOnly + ")";
}
return(newDate.ToString(format) + additionalString);
}
/// <summary>
/// Optimized fist check on cache then database.
/// Get time zone from database base on user name.
/// </summary>
/// <param name="username"></param>
/// <returns>Returns time zone of the user.</returns>
public static TimeZoneSet Get(string username)
{
TimeZoneSet timeZoneInfo = null;
timeZoneInfo = GetSavedTimeZone(username);
if (timeZoneInfo != null)
{
//got time zone from cache.
return(timeZoneInfo);
}
//if cache time zone not exist.
var user = UserManager.GetUser(username);
if (user != null)
{
var timezoneDb = _dbTimeZones.FirstOrDefault(n => n.UserTimeZoneID == user.UserTimeZoneID);
if (timezoneDb != null)
{
timeZoneInfo = new TimeZoneSet();
timeZoneInfo.UserTimezone = timezoneDb;
timeZoneInfo.TimeZoneInfo = SystemTimeZones.FirstOrDefault(n => n.Id == timezoneDb.InfoID);
}
if (timeZoneInfo != null && timeZoneInfo.TimeZoneInfo != null)
{
// Save the time zone to the cache.
SaveTimeZone(timeZoneInfo, username);
return(timeZoneInfo);
}
}
return(null);
}
private static void SaveTimeZone(TimeZoneSet timeZoneInfo, string log)
{
if (log == null || timeZoneInfo == null)
{
return;
}
//save to cache
AppConfig.Caches.Set(CookiesNames.ZoneInfo + log, timeZoneInfo);
}
/// <summary>
/// Saved for current logged user.
/// </summary>
/// <param name="timeZoneInfo"></param>
private static void SaveTimeZone(TimeZoneSet timeZoneInfo)
{
if (!HttpContext.Current.User.Identity.IsAuthenticated)
{
return;
}
var log = HttpContext.Current.User.Identity.Name;
SaveTimeZone(timeZoneInfo, log);
}
/// <summary>
/// No need to convert dates based on time zones.
/// </summary>
/// <param name="timeZone"></param>
/// <param name="dt"></param>
/// <param name="format">if format null then default format.</param>
/// <param name="addTimeZoneString">Add timezone string with Date. Eg. 26-Aug-2015 (GMT -07:00)</param>
/// <returns>Returns nice string format based on logged user's selected time zone.</returns>
public static string GetDate(
TimeZoneSet timeZone,
DateTime?dt,
string format = null,
bool addTimeZoneString = true)
{
if (format == null)
{
format = DateFormat;
}
return(GetDateTime(timeZone, dt, format, addTimeZoneString));
}
