refactor: migrate project structure by reorganizing realization code snippets into documentation and analysis categories.

02_Analyse_Konzept/Common/DestinationService/SetLeRequestDepature.cs

@@ -0,0 +1,35 @@
+	public void SetLeRequestDeparture(string leNo, string placeName)
+	{
+		using var db = _dbContextFactory.GetDbContext();
+		var entry = db.Destination.GetByName(placeName);
+		NullCheck(entry, typeof(Destination), placeName);
+		if (!db.Le.Any(l => l.LeNo == leNo))
+		{
+			throw new InvalidOperationException($"LE {leNo} does not exist.");
+		}
+
+		// only check for regular LE; NoRead can be set in any entry
+		if (leNo != ConstantsCommon.ConstantsLE.NoRead)
+		{
+			db.Destination.GetByLeNo(leNo).ForEach(d =>
+			{
+				if (d.Name == placeName)
+				{
+					if (d.Status != DestinationStatus.LeArrived)
+					{
+						Log.Write(LogLevel.Error,
+							$"{nameof(Le)} {leNo} is set for {nameof(Destination)} {placeName}. But {nameof(Destination.Status)} is {d.Status}.");
+					}
+				}
+				else
+				{
+					Log.Write(LogLevel.Error,
+						$"{nameof(Le)} {leNo} is already set for {nameof(Destination)} {placeName}. {nameof(Destination.Status)} is {d.Status}. Will be deleted from {nameof(Destination)} entry");
+					d.SetLeDeparted();
+				}
+			});
+		}
+
+		db.Destination.GetByName(placeName)?.SetLeRequestDeparture(leNo);
+		db.SaveChanges();
+	}