Updated scanner to infer when it has reached the end of results.

JSMR.Application/Scanning/ScanVoiceWorksHandler.cs

@@ -18,8 +18,11 @@ public sealed class ScanVoiceWorksHandler(
         IVoiceWorksScanner? scanner = scannerRepository.GetScanner(request.Locale);
         IVoiceWorkUpdater? updater = updaterRepository.GetUpdater(request.Locale);
 
-        if (scanner is null || updater is null)
-            return new();
+        if (scanner is null)
+            throw new InvalidOperationException($"No scanner registered for locale {request.Locale}.");
+
+        if (updater is null)
+            throw new InvalidOperationException($"No updater registered for locale {request.Locale}.");
 
         VoiceWorkScanOptions options = new(
             PageNumber: request.PageNumber,
@@ -29,15 +32,20 @@ public sealed class ScanVoiceWorksHandler(
             ExcludeAIGeneratedWorks: true
         );
 
-        IReadOnlyList<DLSiteWork> works = await scanner.ScanPageAsync(options, cancellationToken);
+        VoiceWorkScanResult scanResult = await scanner.ScanPageAsync(options, cancellationToken);
 
-        if (works.Count == 0)
-            return new();
+        if (scanResult.EndOfResults)
+        {
+            return new ScanVoiceWorksResponse(
+                Results: [],
+                EndOfResults: true
+            );
+        }
 
-        string[] productIds = [.. works.Where(x => !string.IsNullOrWhiteSpace(x.ProductId)).Select(x => x.ProductId!)];
+        string[] productIds = [.. scanResult.Works.Where(x => !string.IsNullOrWhiteSpace(x.ProductId)).Select(x => x.ProductId!)];
         VoiceWorkDetailCollection voiceWorkDetails = await dlsiteClient.GetVoiceWorkDetailsAsync(productIds, cancellationToken);
 
-        VoiceWorkIngest[] ingests = [.. works.Select(work =>
+        VoiceWorkIngest[] ingests = [.. scanResult.Works.Select(work =>
         {
             voiceWorkDetails.TryGetValue(work.ProductId!, out VoiceWorkDetails? value);
             return VoiceWorkIngest.From(work, value);
@@ -48,9 +56,9 @@ public sealed class ScanVoiceWorksHandler(
 
         await searchUpdater.UpdateAsync(voiceWorkIds, cancellationToken);
 
-        return new()
-        {
-            Results = upsertResults
-        };
+        return new ScanVoiceWorksResponse(
+            Results: upsertResults,
+            EndOfResults: false
+        );
     }
 }