Allow setting of minimum app version plugin requirement

Flow.Launcher.Core/ExternalPlugins/PluginsManifest.cs

@@ -4,6 +4,7 @@
 using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.DependencyInjection;
 using Flow.Launcher.Plugin;
+using Flow.Launcher.Infrastructure;
 
 namespace Flow.Launcher.Core.ExternalPlugins
 {
@@ -39,13 +40,23 @@ public static async Task<bool> UpdateManifestAsync(bool usePrimaryUrlOnly = fals
                     var results = await mainPluginStore.FetchAsync(token, usePrimaryUrlOnly).ConfigureAwait(false);
 
                     // If the results are empty, we shouldn't update the manifest because the results are invalid.
-                    if (results.Count != 0)
-                    {
-                        UserPlugins = results;
-                        lastFetchedAt = DateTime.Now;
+                    if (results.Count == 0)
+                        return false;
+
+                    lastFetchedAt = DateTime.Now;
 
-                        return true;
+                    var updatedPluginResults = new List<UserPlugin>();
+                    var appVersion = SemanticVersioning.Version.Parse(Constant.Version);
+
+                    for (int i = 0; i < results.Count; i++)
+                    {
+                        if (IsMinimumAppVersionSatisfied(results[i], appVersion))
+                            updatedPluginResults.Add(results[i]);
                     }
+
+                    UserPlugins = updatedPluginResults;
+
+                    return true;
                 }
             }
             catch (Exception e)
@@ -59,5 +70,16 @@ public static async Task<bool> UpdateManifestAsync(bool usePrimaryUrlOnly = fals
 
             return false;
         }
+
+        private static bool IsMinimumAppVersionSatisfied(UserPlugin plugin, SemanticVersioning.Version appVersion)
+        {
+            if (string.IsNullOrEmpty(plugin.MinimumAppVersion) || appVersion >= SemanticVersioning.Version.Parse(plugin.MinimumAppVersion))
+                return true;
+
+            API.LogDebug(ClassName, $"Plugin {plugin.Name} requires minimum Flow Launcher version {plugin.MinimumAppVersion}, "
+                    + $"but current version is {Constant.Version}. Plugin excluded from manifest.");
+
+            return false;
+        }
     }
 }

Flow.Launcher.Plugin/UserPlugin.cs

@@ -76,5 +76,10 @@ public record UserPlugin
         /// Indicates whether the plugin is installed from a local path
         /// </summary>
         public bool IsFromLocalInstallPath => !string.IsNullOrEmpty(LocalInstallPath);
+
+        /// <summary>
+        /// The minimum Flow Launcher version required for this plugin. Default is "".
+        /// </summary>
+        public string MinimumAppVersion { get; set; } = string.Empty;
     }
 }