Add IPIntel API support. (#33339)

Co-authored-by: PJB3005 <pieterjan.briers+git@gmail.com>

Content.Server/Connection/IPIntel/IPIntelAPI.cs

@@ -0,0 +1,40 @@
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Content.Shared.CCVar;
+using Robust.Shared.Configuration;
+using Robust.Shared.Network;
+
+namespace Content.Server.Connection.IPIntel;
+
+public interface IIPIntelApi
+{
+    Task<HttpResponseMessage> GetIPScore(IPAddress ip);
+}
+
+public sealed class IPIntelApi : IIPIntelApi
+{
+    // Holds-The-HttpClient
+    private readonly IHttpClientHolder _http;
+
+    // CCvars
+    private string? _contactEmail;
+    private string? _baseUrl;
+    private string? _flags;
+
+    public IPIntelApi(
+        IHttpClientHolder http,
+        IConfigurationManager cfg)
+    {
+        _http = http;
+
+        cfg.OnValueChanged(CCVars.GameIPIntelEmail, b => _contactEmail = b, true);
+        cfg.OnValueChanged(CCVars.GameIPIntelBase, b => _baseUrl = b, true);
+        cfg.OnValueChanged(CCVars.GameIPIntelFlags, b => _flags = b, true);
+    }
+
+    public Task<HttpResponseMessage> GetIPScore(IPAddress ip)
+    {
+        return _http.Client.GetAsync($"{_baseUrl}/check.php?ip={ip}&contact={_contactEmail}&flags={_flags}");
+    }
+}