feat: Apiwork

1 files changed, 30 insertions, 0 deletions

diff --git a/code/api/src/Endpoints/EndpointBase.cs b/code/api/src/Endpoints/EndpointBase.cs
index de5d967..a5b0931 100644
--- a/code/api/src/Endpoints/EndpointBase.cs
+++ b/code/api/src/Endpoints/EndpointBase.cs
@@ -1,3 +1,5 @@
+using ILogger = Microsoft.Extensions.Logging.ILogger;
+
 namespace IOL.GreatOffice.Api.Endpoints;
 
 [ApiController]
@@ -20,4 +22,32 @@ public class EndpointBase : ControllerBase
             TraceId = HttpContext.TraceIdentifier
         });
     }
+
+    [NonAction]
+    protected RequestTimeZoneInfo GetRequestTimeZone(ILogger logger = default) {
+        Request.Headers.TryGetValue(AppHeaders.BROWSER_TIME_ZONE, out var timeZoneHeader);
+        var tz = TimeZoneInfo.FindSystemTimeZoneById(timeZoneHeader.ToString().HasValue() ? timeZoneHeader.ToString() : "UTC");
+        var offset = tz.BaseUtcOffset.Hours;
+
+        // This is fine as long as the client is not connecting from Australia: Lord Howe Island,
+        // according to https://en.wikipedia.org/wiki/Daylight_saving_time_by_country
+        if (tz.IsDaylightSavingTime(AppDateTime.UtcNow)) {
+            offset++;
+        }
+
+        logger?.LogInformation("Request time zone (" + tz.Id + ") offset is: " + offset + " hours");
+
+        return new RequestTimeZoneInfo() {
+            TimeZoneInfo = tz,
+            Offset = offset,
+            LocalDateTime = TimeZoneInfo.ConvertTimeFromUtc(AppDateTime.UtcNow, tz)
+        };
+    }
+
+    public class RequestTimeZoneInfo
+    {
+        public TimeZoneInfo TimeZoneInfo { get; set; }
+        public int Offset { get; set; }
+        public DateTime LocalDateTime { get; set; }
+    }
 }
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