feature: In-App Simulation Runner (Backend)

2026-08-06 01:52:53 +08:00
parent 943d41339c
commit 24f45851e9
83 changed files with 3974 additions and 120 deletions
@@ -0,0 +1,79 @@
+using VigilCare.Simulation;
+
+public interface IScenarioCatalog
+{
+    IReadOnlyList<ScenarioFile> ListScenarios();
+    ScenarioFile? GetById(string scenarioId);
+}
+
+public sealed class ScenarioCatalog : IScenarioCatalog
+{
+    private readonly string _directory;
+    private readonly object _gate = new();
+    private IReadOnlyList<(ScenarioFile Scenario, string Path, DateTime LastWriteUtc)> _entries =
+        Array.Empty<(ScenarioFile, string, DateTime)>();
+
+    public ScenarioCatalog(Microsoft.Extensions.Options.IOptions<SimulationOptions> options)
+    {
+        _directory = options.Value.ScenarioDirectory;
+    }
+
+    public IReadOnlyList<ScenarioFile> ListScenarios()
+    {
+        RefreshIfNeeded();
+        return _entries.Select(e => e.Scenario).ToList();
+    }
+
+    public ScenarioFile? GetById(string scenarioId)
+    {
+        RefreshIfNeeded();
+        return _entries
+            .Select(e => e.Scenario)
+            .FirstOrDefault(s => string.Equals(
+                s.Scenario.Id, scenarioId, StringComparison.OrdinalIgnoreCase));
+    }
+
+    private void RefreshIfNeeded()
+    {
+        lock (_gate)
+        {
+            if (!Directory.Exists(_directory))
+            {
+                _entries = Array.Empty<(ScenarioFile, string, DateTime)>();
+                return;
+            }
+
+            var disk = Directory.EnumerateFiles(_directory, "*.json")
+                .Where(p => !string.Equals(
+                    Path.GetFileName(p), "schema.json", StringComparison.OrdinalIgnoreCase))
+                .Select(p => (Path: p, LastWriteUtc: File.GetLastWriteTimeUtc(p)))
+                .OrderBy(x => x.Path, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+
+            var unchanged = _entries.Count == disk.Count
+                && _entries.Zip(disk, (cached, onDisk) =>
+                        cached.Path == onDisk.Path && cached.LastWriteUtc == onDisk.LastWriteUtc)
+                    .All(eq => eq);
+
+            if (unchanged)
+                return;
+
+            var loaded = new List<(ScenarioFile Scenario, string Path, DateTime LastWriteUtc)>();
+            foreach (var file in disk)
+            {
+                try
+                {
+                    loaded.Add((ScenarioLoader.Load(file.Path), file.Path, file.LastWriteUtc));
+                }
+                catch
+                {
+                    // Skip corrupt files — catalogue must stay resilient.
+                }
+            }
+
+            _entries = loaded
+                .OrderBy(e => e.Scenario.Scenario.Id, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+        }
+    }
+}