Docker Compose bot + Google Api

LaDOSE.Src/LaDOSE.Service/Provider/SheetsProvider/DisabledSheetsWriter.cs

@@ -0,0 +1,25 @@
+using System.Threading;
+using System.Threading.Tasks;
+using LaDOSE.Business.Interface;
+using LaDOSE.Entity;
+
+namespace LaDOSE.Business.Provider.SheetsProvider
+{
+    /// <summary>
+    /// The default when GoogleSheets:Writer names nothing usable. Reports itself as
+    /// unconfigured so the API answers 503 with a message the user can act on, rather than
+    /// throwing a NullReferenceException that reaches the browser as an HTML developer page.
+    /// </summary>
+    public class DisabledSheetsWriter : ISheetsWriter
+    {
+        public string Name => "Disabled";
+
+        public bool IsConfigured => false;
+
+        public Task<SheetExportResult> WriteTablesAsync(SheetExportRequest request, CancellationToken ct = default)
+        {
+            throw new SheetsExportException(503,
+                "Google Sheets export is not configured on the server. Set GoogleSheets:Writer.");
+        }
+    }
+}