source: binary-improvements2/MapRendering/Web/API/Markers.cs@ 389

using System;
using System.Collections.Generic;
using System.Net;
using AllocsFixes.JSON;

namespace AllocsFixes.NetConnections.Servers.Web.API {
        class Markers : AbsRestApi {
                private readonly Dictionary<string, (string, string)> markers = new Dictionary<string, (string, string)> ();

                private static readonly JSONArray emptyResult = new JSONArray ();
                
                public Markers () {
                        markers.Add (WebUtils.GenerateGuid (), ("539", "498"));
                        markers.Add (WebUtils.GenerateGuid (), ("-18", "524"));
                        markers.Add (WebUtils.GenerateGuid (), ("29", "-162"));
                        markers.Add (WebUtils.GenerateGuid (), ("458", "-257"));
                }

                protected override void HandleRestGet (RequestContext _context) {
                        string id = _context.RequestPath;
                        
                        if (string.IsNullOrEmpty (id)) {
                                JSONArray result = new JSONArray ();

                                foreach (KeyValuePair<string, (string, string)> kvp in markers) {
                                        JSONObject marker = new JSONObject ();
                                        marker.Add ("id", new JSONString (kvp.Key));
                                        marker.Add ("lat", new JSONString (kvp.Value.Item1));
                                        marker.Add ("lng", new JSONString (kvp.Value.Item2));
                                        result.Add (marker);
                                }
                                
                                SendEnvelopedResult (_context, result);
                                return;
                        }

                        if (!markers.TryGetValue (id, out (string, string) location)) {
                                SendEnvelopedResult (_context, emptyResult, HttpStatusCode.NotFound);
                                return;
                        }

                        {
                                JSONArray result = new JSONArray ();
                                JSONObject marker = new JSONObject ();
                                marker.Add ("id", new JSONString (id));
                                marker.Add ("lat", new JSONString (location.Item1));
                                marker.Add ("lng", new JSONString (location.Item2));
                                result.Add (marker);
                                SendEnvelopedResult (_context, result);
                        }
                }

                protected override void HandleRestPost (RequestContext _context, JSONNode _jsonBody) {
                        if (!(_jsonBody is JSONObject bodyObject)) {
                                
                        }

                        throw new NotImplementedException ();
                }

                protected override void HandleRestPut (RequestContext _context, JSONNode _jsonBody) {
                        throw new NotImplementedException ();
                }

                protected override void HandleRestDelete (RequestContext _context) {
                        throw new NotImplementedException ();
                }
        }
}