Implemented custom Manifest property UpdateCautionMessage

Relates to #299.

Author: Floogen

Stardrop/Models/SMAPI/Manifest.cs

@@ -36,5 +36,8 @@ public class Manifest
 
         /// <summary>Custom property for Stardrop.</summary>
         public bool DeleteOldVersion { get; set; }
+
+        /// <summary>Custom property for Stardrop.</summary>
+        public string? UpdateCautionMessage { get; set; }
     }
 }

Stardrop/Views/MainWindow.axaml.cs

@@ -2260,6 +2260,25 @@ private async Task<List<Mod>> AddMods(string[]? filePaths)
                             continue;
                         }
 
+                        // If this is a mod update and if the Manifest.UpdateCautionMessage has a value, display message (and confirm if user wants to continue with mod update)
+                        bool shouldProceedWithUpdate = true;
+                        foreach (var manifest in pathToManifests.Values.Where(m => m is not null && HasModInstalled(m.UniqueID) is true && string.IsNullOrEmpty(m.UpdateCautionMessage) is false))
+                        {
+                            var requestWindow = new MessageWindow(String.Format(Program.translation.Get("ui.message.confirm_mod_update_caution"), manifest!.Name, manifest!.UpdateCautionMessage)) { Topmost = true };
+                            if (await requestWindow.ShowDialog<bool>(this) is false)
+                            {
+                                Program.helper.Log($"User elected to skip mod update due to given Manifest.UpdateCautionMessage message for mod {manifest!.UniqueID}:{manifest!.UpdateCautionMessage}");
+                                shouldProceedWithUpdate = false;
+                                break;
+                            }
+                        }
+
+                        // Skip updating if user elected to skip any of the bundled mods due to Manifest.UpdateCautionMessage
+                        if (shouldProceedWithUpdate is false)
+                        {
+                            continue;
+                        }
+
                         int currentManifestIndex = 1;
                         bool alwaysAskToDelete = Program.settings.AlwaysAskToDelete;
                         foreach (var manifestPath in pathToManifests.Keys)
@@ -2438,6 +2457,11 @@ private async Task<List<Mod>> AddMods(string[]? filePaths)
             return addedMods;
         }
 
+        private bool HasModInstalled(string uniqueID)
+        {
+            return _viewModel.Mods.Any(m => m.UniqueId.Equals(uniqueID, StringComparison.OrdinalIgnoreCase));
+        }
+
         private void CreateDirectoryJunctions(List<string> arguments)
         {
             // Prepare the process

Stardrop/i18n/default.json

@@ -228,6 +228,7 @@
   "ui.message.confirm_nxm_install": "Would you like to install the following mod:\n\n{0}\n\nYou can disable this confirmation in the settings menu.",
   "ui.message.require_nexus_login": "This action requires being signed into the Nexus Mods API.",
   "ui.message.succeeded_nexus_install": "Successfully installed the following mod via Nexus Mods:\n\n{0}",
+  "ui.message.confirm_mod_update_caution": "{0}\nUpdate Caution Message:\n\n{1}\n\nProceed with the mod update?",
 
   // Window Names
   "ui.window.settings.name": "Settings",