Implemented node system statistics

MoonlightServers.Api/Admin/Nodes/NodeMapper.cs

@@ -1,5 +1,6 @@
 using System.Diagnostics.CodeAnalysis;
 using MoonlightServers.Api.Infrastructure.Database.Entities;
+using MoonlightServers.DaemonShared.Http.Daemon;
 using MoonlightServers.Shared.Admin.Nodes;
 using Riok.Mapperly.Abstractions;
 
@@ -14,4 +15,6 @@ public static partial class NodeMapper
     public static partial IQueryable<NodeDto> ProjectToDto(this IQueryable<Node> nodes);
     public static partial Node ToEntity(CreateNodeDto dto);
     public static partial void Merge([MappingTarget] Node node, UpdateNodeDto dto);
+
+    public static partial NodeStatisticsDto ToDto(SystemStatisticsDto dto);
 }

MoonlightServers.Api/Admin/Nodes/NodeService.cs

@@ -54,6 +54,19 @@ public class NodeService
         }
     }
 
+    public async Task<SystemStatisticsDto> GetStatisticsAsync(Node node)
+    {
+        var client = ClientFactory.CreateClient();
+
+        var request = CreateBaseRequest(node, HttpMethod.Get, "api/system/statistics");
+
+        var response = await client.SendAsync(request);
+
+        await EnsureSuccessAsync(response);
+
+        return (await response.Content.ReadFromJsonAsync<SystemStatisticsDto>(SerializationContext.Default.Options))!;
+    }
+
     private static HttpRequestMessage CreateBaseRequest(
         Node node,
         [StringSyntax(StringSyntaxAttribute.Uri)]

MoonlightServers.Api/Admin/Nodes/StatisticsController.cs

@@ -0,0 +1,40 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using MoonlightServers.Api.Infrastructure.Database;
+using MoonlightServers.Api.Infrastructure.Database.Entities;
+using MoonlightServers.Shared;
+using MoonlightServers.Shared.Admin.Nodes;
+
+namespace MoonlightServers.Api.Admin.Nodes;
+
+[ApiController]
+[Authorize(Policy = Permissions.Nodes.View)]
+[Route("api/admin/servers/nodes/{id:int}/statistics")]
+public class StatisticsController : Controller
+{
+    private readonly NodeService NodeService;
+    private readonly DatabaseRepository<Node> NodeRepository;
+
+    public StatisticsController(NodeService nodeService, DatabaseRepository<Node> nodeRepository)
+    {
+        NodeService = nodeService;
+        NodeRepository = nodeRepository;
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<NodeStatisticsDto>> GetAsync([FromRoute] int id)
+    {
+        var node = await NodeRepository
+            .Query()
+            .FirstOrDefaultAsync(x => x.Id == id);
+
+        if (node == null)
+            return Problem("No node with this id found", statusCode: 404);
+
+        var statistics = await NodeService.GetStatisticsAsync(node);
+        var dto = NodeMapper.ToDto(statistics);
+
+        return dto;
+    }
+}