show available custom maps and let them download (#8)

Common/CommandLineUtils.cs

@@ -1,11 +1,15 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
 using System.Text;
 
 namespace Common
 {
     public static class CommandLineUtils
     {
+        public static string BloodDir => Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "blood");
+
         public static string GetClientLaunchCommand(string host, int port, string modCommandLine) =>
             $"nblood -client {host} -port {port} {modCommandLine}";
     }

Common/ProcessSpawner.cs

@@ -2,8 +2,6 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
-using System.IO;
-using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Linq;
@@ -18,7 +16,6 @@ namespace Common
         private const int maximumServers = 80;
         private const string nBloodExecutable = "nblood_server";
 
-        private static readonly string workingDir = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "blood");
         private static readonly Random rnd = new Random();
 
         public static SpawnedServerInfo SpawnServer(int players, string modName)
@@ -67,7 +64,7 @@ namespace Common
             var psi = new ProcessStartInfo(GetExecutableName(), $"-server {maxPlayers} -port {port} -pname Server {mod.CommandLine}")
             {
                 UseShellExecute = true,
-                WorkingDirectory = workingDir
+                WorkingDirectory = CommandLineUtils.BloodDir
             };
 
             return psi;

WebInterface/Controllers/CustomMapsController.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using WebInterface.Services;
+
+namespace WebInterface.Controllers
+{
+    public class CustomMapsController : Controller
+    {
+        private readonly ICustomMapService _customMapService;
+
+        public CustomMapsController(ICustomMapService customMapService)
+        {
+            _customMapService = customMapService;
+        }
+
+        [Route("nblood/custommaps", Name = "CustomMaps")]
+        public IActionResult Index()
+        {
+            var viewModel = _customMapService.ListCustomMaps();
+            return View(viewModel);
+        }
+
+        [Route("nblood/custommaps/download", Name = "DownloadCustomMap")]
+        public FileResult Index([FromQuery] string map)
+        {
+            byte[] customMap = _customMapService.GetCustomMapBytes(map);
+            return File(customMap, System.Net.Mime.MediaTypeNames.Application.Octet, map);
+        }
+    }
+}

WebInterface/Services/CustomMapService.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace WebInterface.Services
+{
+    public class CustomMapService : ICustomMapService
+    {
+        private static readonly List<string> crypticMaps = new List<string>()
+        {
+            "CPSL.MAP",
+            "CP01.MAP",
+            "CP02.MAP",
+            "CP03.MAP",
+            "CP04.MAP",
+            "CP05.MAP",
+            "CP06.MAP",
+            "CP07.MAP",
+            "CP08.MAP",
+            "CP09.MAP",
+            "CPBB01.MAP",
+            "CPBB02.MAP",
+            "CPBB03.MAP",
+            "CPBB04.MAP",
+        };
+
+        private List<string> ListableCustomMaps => Directory.GetFiles(Common.CommandLineUtils.BloodDir,
+            "*.map", SearchOption.TopDirectoryOnly)
+            .Select(m => Path.GetFileName(m))
+            .Where(m => !ContainsString(crypticMaps, m))
+            .ToList();
+
+        public IList<string> ListCustomMaps() => ListableCustomMaps;
+
+        public byte[] GetCustomMapBytes(string map)
+        {
+            if (ListableCustomMaps.Any(m => StringsAreSame(m, map)))
+            {
+                return File.ReadAllBytes(Path.Combine(Common.CommandLineUtils.BloodDir, map));
+            }
+            else
+            {
+                throw new Exception($"Cannot download this map: {map}");
+            }
+        }
+
+        private bool ContainsString(IEnumerable<string> list, string value) =>
+            list.Any(e => StringsAreSame(e, value));
+
+        private bool StringsAreSame(string left, string right) =>
+            string.Compare(left, right, StringComparison.OrdinalIgnoreCase) == 0;
+    }
+}

WebInterface/Services/ICustomMapService.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace WebInterface.Services
+{
+    public interface ICustomMapService
+    {
+        IList<string> ListCustomMaps();
+        byte[] GetCustomMapBytes(string map);
+    }
+}

WebInterface/Startup.cs

@@ -42,6 +42,7 @@ namespace WebInterface
             services.Add(new ServiceDescriptor(typeof(IStateService), typeof(StateService), ServiceLifetime.Singleton));
             services.Add(new ServiceDescriptor(typeof(IPrivateServerService), typeof(PrivateServerService), ServiceLifetime.Transient));
             services.Add(new ServiceDescriptor(typeof(IRateLimiterService), typeof(RateLimiterService), ServiceLifetime.Singleton));
+            services.Add(new ServiceDescriptor(typeof(ICustomMapService), typeof(CustomMapService), ServiceLifetime.Transient));
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.

WebInterface/Views/CustomMaps/Index.cshtml

@@ -0,0 +1,14 @@
+@model List<string>
+@{
+    ViewData["Title"] = "Custom Maps";
+    Layout = "~/Views/Shared/_Layout.cshtml";
+}
+
+<h1>List of available custom maps</h1>
+
+<ul>
+    @foreach (var map in Model)
+    {
+        <li><a href="@Url.Link("DownloadCustomMap", new { map = map })">@map</a></li>
+    }
+</ul>

WebInterface/Views/Shared/_Layout.cshtml

@@ -35,8 +35,13 @@
 <body style="background-color: cornsilk">
     <div class="main">
         <header>
+            <div style="float: left; margin-right: 1em;">
+                <form method="get">
+                    <button asp-route="Home">Home</button>
+                </form>
+            </div>
             <form method="get">
-                <button asp-route="Home">Home</button>
+                <button asp-route="CustomMaps">Custom Maps</button>
             </form>
             <hr />
             <p>I live... Again!</p>