Improve mod list, download release info for each mod

GCMM/MainModder.cs

@@ -2,6 +2,7 @@
 using Newtonsoft.Json.Linq;
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -16,15 +17,13 @@ namespace GCMM
 
         public void GetInstalledMods()
         {
-            foreach (var mod in Directory.GetFiles(Settings.Default.GamePath + @"\Plugins", "*.dll"))
+            foreach (var modPath in Directory.GetFiles(Settings.Default.GamePath + @"\Plugins", "*.dll"))
             {
                 try
                 {
-                    var an = AssemblyName.GetAssemblyName(mod);
+                    var an = AssemblyName.GetAssemblyName(modPath);
                     if (an.Name == "0Harmony") continue;
-                    var item = new ListViewItem(new[] { an.Name, "", an.Version.ToString(), File.GetLastWriteTime(mod).ToString() }, modlist.Groups["installed"]);
-                    item.Name = an.Name;
-                    modlist.Items.Add(item);
+                    AddUpdateModInList(new ModInfo { Name = an.Name, Version = an.Version.ToString(), LastUpdated = File.GetLastWriteTime(modPath) });
                 }
                 catch (BadImageFormatException)
                 { //Not a .NET assembly
@@ -41,21 +40,70 @@ namespace GCMM
                 if (!(bool)obj["ok"]) return;
                 foreach (var repo in obj["data"])
                 {
-                    string name = repo["name"].ToString();
-                    if (modlist.Items.ContainsKey(name))
+                    var mod = new ModInfo
                     {
-                        var item = modlist.Items[name];
-                        var si = item.SubItems;
-                        si[1] = new ListViewItem.ListViewSubItem(item, repo["owner"]["username"].ToString());
-                    }
-                    else
-                    {
-                        var item = new ListViewItem(new[] { name, repo["owner"]["username"].ToString(), "", ((DateTime)repo["updated_at"]).ToString() }, modlist.Groups["available"]);
-                        item.Name = name;
-                        modlist.Items.Add(item);
-                    }
+                        Name = repo["name"].ToString(),
+                        Author = repo["owner"]["username"].ToString(),
+                        LastUpdated = (DateTime)repo["updated_at"]
+                    };
+                    if (await FetchModInfo(mod)) //If it's actually a mod
+                        AddUpdateModInList(mod);
+                }
+            }
+        }
+
+        public async Task<bool> FetchModInfo(ModInfo mod)
+        {
+            string repoURL = "/api/v1/repos/" + mod.Author + "/" + mod.Name + "/releases";
+            using (var client = GetClient())
+            {
+                var obj = JArray.Parse(await client.DownloadStringTaskAsync(repoURL));
+                var release = obj.FirstOrDefault(rel => !(bool)rel["prerelease"] && !(bool)rel["draft"]);
+                if (release == null)
+                    return false;
+                else
+                {
+                    mod.DownloadURL = release["assets"].First["browser_download_url"].ToString();
+                    mod.LastUpdated = (DateTime)release["published_at"];
+                    mod.LatestVersion = release["tag_name"].ToString().Replace("v", "");
+                    return true;
                 }
             }
         }
+
+        public void AddUpdateModInList(ModInfo mod)
+        {
+            if (mods.ContainsKey(mod.Name) ^ modlist.Items.ContainsKey(mod.Name))
+                throw new InvalidOperationException("The mod isn't present in one of the two places: " + mod.Name);
+            if (modlist.Items.ContainsKey(mod.Name))
+            {
+                var omod = mods[mod.Name];
+                var item = modlist.Items[mod.Name];
+                var items = item.SubItems;
+                omod.Author = mod.Author ?? omod.Author;
+                omod.Version = mod.Version ?? omod.Version;
+                omod.LatestVersion = mod.LatestVersion ?? omod.LatestVersion;
+                omod.LastUpdated = mod.LastUpdated == default ? omod.LastUpdated : mod.LastUpdated;
+                items[1].Text = omod.Author ?? "";
+                items[2].Text = omod.Version ?? omod.LatestVersion;
+                items[3].Text = omod.LastUpdated.ToString();
+                item.Group = omod.Installed ? modlist.Groups["installed"] : modlist.Groups["available"];
+                if (mod.Version != mod.LatestVersion)
+                    items[2].ForeColor = Color.Red;
+            }
+            else
+            {
+                mods.Add(mod.Name, mod);
+                var item = new ListViewItem(new[] { mod.Name, mod.Author ?? "", mod.Version ?? mod.LatestVersion ?? "", mod.LastUpdated.ToString() }, modlist.Groups[mod.Installed ? "installed" : "available"]);
+                item.Name = mod.Name;
+                modlist.Items.Add(item);
+            }
+        }
+
+        public void RemoveModFromList(ModInfo mod)
+        {
+            if (mods.Remove(mod.Name))
+                modlist.Items.RemoveByKey(mod.Name);
+        }
     }
 }

GCMM/ModInfo.cs

@@ -6,13 +6,24 @@ using System.Threading.Tasks;
 
 namespace GCMM
 {
-    class ModInfo
+    public class ModInfo
     {
         public string Name { get; set; }
+        /// <summary>
+        /// Can be null.
+        /// </summary>
         public string Version { get; set; }
         public string LatestVersion { get; set; }
+        /// <summary>
+        /// Can be null.
+        /// </summary>
         public string Description { get; set; }
+        /// <summary>
+        /// Can be null.
+        /// </summary>
         public string Author { get; set; }
         public DateTime LastUpdated { get; set; }
+        public bool Installed => Version != null;
+        public string DownloadURL { get; set; }
     }
 }