1 files changed, 93 insertions, 0 deletions
diff --git a/src/SMAPI.Web/Controllers/IndexController.cs b/src/SMAPI.Web/Controllers/IndexController.cs
new file mode 100644
index 00000000..5d45118f
--- /dev/null
+++ b/src/SMAPI.Web/Controllers/IndexController.cs
@@ -0,0 +1,93 @@
+using System;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Caching.Memory;
+using StardewModdingAPI.Web.Framework.Clients.GitHub;
+using StardewModdingAPI.Web.ViewModels;
+
+namespace StardewModdingAPI.Web.Controllers
+{
+    /// <summary>Provides an info/download page about SMAPI.</summary>
+    [Route("")]
+    [Route("install")]
+    internal class IndexController : Controller
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The cache in which to store release data.</summary>
+        private readonly IMemoryCache Cache;
+
+        /// <summary>The GitHub API client.</summary>
+        private readonly IGitHubClient GitHub;
+
+        /// <summary>The cache time for release info.</summary>
+        private readonly TimeSpan CacheTime = TimeSpan.FromMinutes(5);
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="cache">The cache in which to store release data.</param>
+        /// <param name="github">The GitHub API client.</param>
+        public IndexController(IMemoryCache cache, IGitHubClient github)
+        {
+            this.Cache = cache;
+            this.GitHub = github;
+        }
+
+        /// <summary>Display the index page.</summary>
+        [HttpGet]
+        public async Task<ViewResult> Index()
+        {
+            // fetch latest SMAPI release
+            GitRelease release = await this.Cache.GetOrCreateAsync("latest-smapi-release", async entry =>
+            {
+                entry.AbsoluteExpiration = DateTimeOffset.UtcNow.Add(this.CacheTime);
+                return await this.GitHub.GetLatestReleaseAsync("Pathoschild/SMAPI");
+            });
+            string downloadUrl = this.GetMainDownloadUrl(release);
+            string devDownloadUrl = this.GetDevDownloadUrl(release);
+
+            // render view
+            var model = new IndexModel(release.Name, release.Body, downloadUrl, devDownloadUrl);
+            return this.View(model);
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>Get the main download URL for a SMAPI release.</summary>
+        /// <param name="release">The SMAPI release.</param>
+        private string GetMainDownloadUrl(GitRelease release)
+        {
+            // get main download URL
+            foreach (GitAsset asset in release.Assets ?? new GitAsset[0])
+            {
+                if (Regex.IsMatch(asset.FileName, @"SMAPI-[\d\.]+-installer.zip"))
+                    return asset.DownloadUrl;
+            }
+
+            // fallback just in case
+            return "https://github.com/pathoschild/SMAPI/releases";
+        }
+
+        /// <summary>Get the for-developers download URL for a SMAPI release.</summary>
+        /// <param name="release">The SMAPI release.</param>
+        private string GetDevDownloadUrl(GitRelease release)
+        {
+            // get dev download URL
+            foreach (GitAsset asset in release.Assets ?? new GitAsset[0])
+            {
+                if (Regex.IsMatch(asset.FileName, @"SMAPI-[\d\.]+-installer-for-developers.zip"))
+                    return asset.DownloadUrl;
+            }
+
+            // fallback just in case
+            return "https://github.com/pathoschild/SMAPI/releases";
+        }
+    }
+}