Implement download controller

src/Podsync/Controllers/DownloadController.cs

@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Podsync.Services.Links;
+using Podsync.Services.Resolver;
+
+namespace Podsync.Controllers
+{
+    [Route("download")]
+    public class DownloadController : Controller
+    {
+        private readonly IResolverService _resolverService;
+        private readonly ILinkService _linkService;
+
+        public DownloadController(IResolverService resolverService, ILinkService linkService)
+        {
+            _resolverService = resolverService;
+            _linkService = linkService;
+        }
+
+        [Route("{provider}/{videoId}.mp4")]
+        public async Task<IActionResult> Download(Provider provider, string videoId)
+        {
+            var url = _linkService.Make(new LinkInfo
+            {
+                Provider = provider,
+                LinkType = LinkType.Video,
+                Id = videoId
+            });
+
+            var redirectUrl = await _resolverService.Resolve(url);
+
+            return Redirect(redirectUrl.ToString());
+        }
+    }
+}