Persistenz: SQLite + Dapper, chains/messages Tabellen, History-Endpoint, Frontend History-Load

Endpoints/HistoryEndpoint.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Gott.Models;
+using Gott.Services;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Routing;
+
+namespace Gott.Endpoints;
+
+public static class HistoryEndpoint
+{
+    public static void MapHistoryEndpoint(this IEndpointRouteBuilder app)
+    {
+        app.MapGet("/api/history", HandleHistory);
+    }
+
+    private static async Task HandleHistory(HttpContext ctx, DatabaseService db)
+    {
+        var sessionId = ctx.Request.Query["sessionId"].FirstOrDefault();
+        var limitStr = ctx.Request.Query["limit"].FirstOrDefault();
+        var limit = int.TryParse(limitStr, out var l) ? l : 50;
+
+        IEnumerable<ChainRecord> chains;
+        if (string.IsNullOrEmpty(sessionId) || sessionId == "null")
+            chains = await db.GetRecentChains(limit);
+        else
+            chains = await db.GetSessionChains(sessionId, limit);
+
+        var result = new List<object>();
+        foreach (var chain in chains)
+        {
+            var messages = await db.GetChainMessages(chain.ChainId);
+            result.Add(new { chain, messages });
+        }
+
+        await ctx.Response.WriteAsJsonAsync(result);
+    }
+}