1 files changed, 54 insertions, 0 deletions
diff --git a/code/api/src/Endpoints/EndpointBase.cs b/code/api/src/Endpoints/EndpointBase.cs
new file mode 100644
index 0000000..105fbdf
--- /dev/null
+++ b/code/api/src/Endpoints/EndpointBase.cs
@@ -0,0 +1,54 @@
+using ILogger = Microsoft.Extensions.Logging.ILogger;
+
+namespace IOL.GreatOffice.Api.Endpoints;
+
+[ApiController]
+public class EndpointBase : ControllerBase
+{
+    /// <summary>
+    /// User data for the currently logged on user.
+    /// </summary>
+    protected LoggedInUserModel LoggedInUser => new() {
+        Username = User.FindFirstValue(AppClaims.NAME),
+        Id = User.FindFirstValue(AppClaims.USER_ID).AsGuid(),
+    };
+
+    [NonAction]
+    protected ActionResult KnownProblem(string title = default, string subtitle = default, Dictionary<string, string[]> errors = default) {
+        HttpContext.Response.Headers.Add(AppHeaders.IS_KNOWN_PROBLEM, "1");
+        return BadRequest(new KnownProblemModel {
+            Title = title,
+            Subtitle = subtitle,
+            Errors = errors,
+            TraceId = HttpContext.TraceIdentifier
+        });
+    }
+
+    [NonAction]
+    protected ActionResult KnownProblem(KnownProblemModel problem) {
+        HttpContext.Response.Headers.Add(AppHeaders.IS_KNOWN_PROBLEM, "1");
+        problem.TraceId = HttpContext.TraceIdentifier;
+        return BadRequest(problem);
+    }
+
+    [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)
+        };
+    }
+}
+\ No newline at end of file