add simple generate changelog feature

ModpackUpdater.Apps.Manager/Features/SharedFunctions.cs

@@ -1,7 +1,9 @@
-using ModpackUpdater.Apps.Manager.Api.Model;
+using Microsoft.Extensions.Primitives;
+using ModpackUpdater.Apps.Manager.Api.Model;
 using ModpackUpdater.Apps.Manager.Ui;
 using ModpackUpdater.Manager;
 using Pilz.UI.Extensions;
+using System.Text;
 using Telerik.WinControls.UI;
 
 namespace ModpackUpdater.Apps.Manager.Features;
@@ -154,4 +156,50 @@ internal static class SharedFunctions
         gridView?.EndUpdate();
         rwb?.StopWaiting();
     }
+
+    public static string GenerateChangelog(InstallInfos installInfos, UpdateInfo updateInfos)
+    {
+        var log = new StringBuilder();
+
+        foreach (var action in updateInfos.Actions.OrderBy(n => n.Type))
+        {
+            // Create copy
+            var copy = new UpdateAction();
+            ModpackInstaller.DuplicateTo(action, copy);
+
+            // Resolve inherit
+            if (!string.IsNullOrWhiteSpace(copy.InheritFrom))
+                ModpackInstaller.ResolveInherit(copy, installInfos);
+
+            if (string.IsNullOrWhiteSpace(copy.Name) || copy.Type != UpdateActionType.Update)
+                continue;
+
+            // Append bullet
+            log.Append('-');
+
+            // Append action indicator
+            log.Append(' ');
+            log.Append("⚒️");
+
+            // Append name
+            log.Append(' ');
+            log.Append("**");
+            log.Append(copy.Name);
+            log.Append("**");
+
+            // Append new version
+            if (!string.IsNullOrWhiteSpace(copy.SourceTag))
+            {
+                log.Append(' ');
+                log.Append('`');
+                log.Append(copy.SourceTag);
+                log.Append('`');
+            }
+
+            // Append new line
+            log.AppendLine();
+        }
+
+        return log.ToString().TrimEnd();
+    }
 }