feat(panel): edit memoryMB from the Settings modal

Adds GET/POST /api/daemon/config (safe subset of server-config.json -- just memoryMB for now) and a "Resources" section in the existing Settings modal. The Save and Save+restart buttons now POST both /api/server/settings and /api/daemon/config; restartRequired is OR'd across the two endpoints. Future fields like backupKeep / backupSchedule / bluemapDir can be added by extending DAEMON_FIELDS in settings.js + the validation block in RunCommand.cs. Sensitive fields (passwords, manifestUrl, ports) are intentionally kept off this endpoint.
2026-05-20 21:25:47 +01:00
parent 9bf3cc69b0
commit 683c2c19ff
4 changed files with 116 additions and 5 deletions
@@ -707,6 +707,49 @@ public sealed class RunCommand : AsyncCommand<BaseCommandSettings>
            return Results.Json(new { ok = true, restartRequired = serverProc.IsRunning });
        });

+        // ── Daemon config (safe subset of server-config.json) ──
+        // Lets the panel edit things that live in our own config, not server.properties:
+        // memoryMB (the JVM -Xmx). Sensitive fields (passwords, manifestUrl, ports) are
+        // intentionally not exposed here -- those still need direct file edits + restart.
+        app.MapGet("/api/daemon/config", () => Results.Json(new
+        {
+            memoryMB = config.MemoryMB,
+        }));
+
+        app.MapPost("/api/daemon/config", async (HttpContext ctx) =>
+        {
+            using var sr = new StreamReader(ctx.Request.Body);
+            var payload = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(
+                await sr.ReadToEndAsync(), JsonOpts.CaseInsensitive);
+            if (payload is null || payload.Count == 0)
+                return Results.BadRequest(new { ok = false, error = "Empty payload." });
+
+            var changed = false;
+
+            if (payload.TryGetValue("memoryMB", out var memEl))
+            {
+                int memMB;
+                if (memEl.ValueKind == JsonValueKind.Number) memMB = memEl.GetInt32();
+                else if (!int.TryParse(memEl.GetString(), out memMB))
+                    return Results.BadRequest(new { ok = false, error = "memoryMB must be a number" });
+
+                // Sanity bounds. MC needs at least 1 GB; absolute cap of 64 GB protects against
+                // a fat-fingered entry that would refuse to start (JVM allocates Xmx up front).
+                if (memMB < 1024) return Results.BadRequest(new { ok = false, error = "memoryMB must be >= 1024" });
+                if (memMB > 65536) return Results.BadRequest(new { ok = false, error = "memoryMB must be <= 65536" });
+
+                if (config.MemoryMB != memMB)
+                {
+                    config.MemoryMB = memMB;
+                    changed = true;
+                }
+            }
+
+            if (changed) config.Save(configPath);
+            // Memory changes always require a restart -- the JVM can't grow -Xmx at runtime.
+            return Results.Json(new { ok = true, restartRequired = changed && serverProc.IsRunning });
+        });
+
        // ── BlueMap (manual render) ──
        app.MapGet("/api/map/status", () => Results.Json(new
        {