feat: export PostgreSQL training dataset as JSON

2026-07-12 11:55:17 +09:00
parent e15e4c6e20
commit 49637f1b02
4 changed files with 61 additions and 0 deletions
@@ -0,0 +1,29 @@
+using System.Text.Json;
+using QuantEngine.Core.Interfaces;
+
+namespace QuantEngine.Application.Services;
+
+public sealed class LearningDatasetService
+{
+    private readonly ILearningDatasetReader _reader;
+
+    public LearningDatasetService(ILearningDatasetReader reader) => _reader = reader;
+
+    public async Task<string> ExportJsonAsync(string outputPath, int limit = 1000)
+    {
+        var rows = await _reader.ReadTrainingExamplesAsync(limit);
+        var payload = new
+        {
+            formula_id = "ENGINE_HISTORY_TRAINING_DATASET_V1",
+            gate = rows.Count > 0 ? "PASS" : "DATA_MISSING",
+            generated_at = DateTimeOffset.UtcNow,
+            sample_count = rows.Count,
+            source = "engine_history.training_example_v1",
+            rows
+        };
+        var path = Path.GetFullPath(outputPath);
+        Directory.CreateDirectory(Path.GetDirectoryName(path)!);
+        await File.WriteAllTextAsync(path, JsonSerializer.Serialize(payload, new JsonSerializerOptions { WriteIndented = true }));
+        return path;
+    }
+}