Merge branch 'dev' into rename-file

.github/actions/spelling/expect.txt

@@ -99,3 +99,7 @@ pluginsmanager
 alreadyexists
 Softpedia
 img
+Reloadable
+metadatas
+WMP
+VSTHRD

.github/actions/spelling/patterns.txt

@@ -133,3 +133,4 @@
 \bPortuguês (Brasil)\b
 \bčeština\b
 \bPortuguês\b
+\bIoc\b

Flow.Launcher.Core/Plugin/PluginInstaller.cs

@@ -0,0 +1,353 @@
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+using CommunityToolkit.Mvvm.DependencyInjection;
+using Flow.Launcher.Infrastructure.UserSettings;
+using Flow.Launcher.Plugin;
+
+namespace Flow.Launcher.Core.Plugin;
+
+/// <summary>
+/// Class for installing, updating, and uninstalling plugins.
+/// </summary>
+public static class PluginInstaller
+{
+    private static readonly string ClassName = nameof(PluginInstaller);
+
+    private static readonly Settings Settings = Ioc.Default.GetRequiredService<Settings>();
+
+    // We should not initialize API in static constructor because it will create another API instance
+    private static IPublicAPI api = null;
+    private static IPublicAPI API => api ??= Ioc.Default.GetRequiredService<IPublicAPI>();
+
+    /// <summary>
+    /// Installs a plugin and restarts the application if required by settings. Prompts user for confirmation and handles download if needed.
+    /// </summary>
+    /// <param name="newPlugin">The plugin to install.</param>
+    /// <returns>A Task representing the asynchronous install operation.</returns>
+    public static async Task InstallPluginAndCheckRestartAsync(UserPlugin newPlugin)
+    {
+        if (API.PluginModified(newPlugin.ID))
+        {
+            API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), newPlugin.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+            return;
+        }
+
+        if (API.ShowMsgBox(
+            string.Format(
+                API.GetTranslation("InstallPromptSubtitle"),
+                newPlugin.Name, newPlugin.Author, Environment.NewLine),
+            API.GetTranslation("InstallPromptTitle"),
+            button: MessageBoxButton.YesNo) != MessageBoxResult.Yes) return;
+
+        try
+        {
+            // at minimum should provide a name, but handle plugin that is not downloaded from plugins manifest and is a url download
+            var downloadFilename = string.IsNullOrEmpty(newPlugin.Version)
+                ? $"{newPlugin.Name}-{Guid.NewGuid()}.zip"
+                : $"{newPlugin.Name}-{newPlugin.Version}.zip";
+
+            var filePath = Path.Combine(Path.GetTempPath(), downloadFilename);
+
+            using var cts = new CancellationTokenSource();
+
+            if (!newPlugin.IsFromLocalInstallPath)
+            {
+                await DownloadFileAsync(
+                    $"{API.GetTranslation("DownloadingPlugin")} {newPlugin.Name}",
+                    newPlugin.UrlDownload, filePath, cts);
+            }
+            else
+            {
+                filePath = newPlugin.LocalInstallPath;
+            }
+
+            // check if user cancelled download before installing plugin
+            if (cts.IsCancellationRequested)
+            {
+                return;
+            }
+
+            if (!File.Exists(filePath))
+            {
+                throw new FileNotFoundException($"Plugin {newPlugin.ID} zip file not found at {filePath}", filePath);
+            }
+
+            if (!API.InstallPlugin(newPlugin, filePath))
+            {
+                return;
+            }
+
+            if (!newPlugin.IsFromLocalInstallPath)
+            {
+                File.Delete(filePath);
+            }
+        }
+        catch (Exception e)
+        {
+            API.LogException(ClassName, "Failed to install plugin", e);
+            API.ShowMsgError(API.GetTranslation("ErrorInstallingPlugin"));
+            return; // do not restart on failure
+        }
+
+        if (Settings.AutoRestartAfterChanging)
+        {
+            API.RestartApp();
+        }
+        else
+        {
+            API.ShowMsg(
+                API.GetTranslation("installbtn"),
+                string.Format(
+                    API.GetTranslation(
+                        "InstallSuccessNoRestart"),
+                    newPlugin.Name));
+        }
+    }
+
+    /// <summary>
+    /// Installs a plugin from a local zip file and restarts the application if required by settings. Validates the zip and prompts user for confirmation.
+    /// </summary>
+    /// <param name="filePath">The path to the plugin zip file.</param>
+    /// <returns>A Task representing the asynchronous install operation.</returns>
+    public static async Task InstallPluginAndCheckRestartAsync(string filePath)
+    {
+        UserPlugin plugin;
+        try
+        {
+            using ZipArchive archive = ZipFile.OpenRead(filePath);
+            var pluginJsonEntry = archive.Entries.FirstOrDefault(x => x.Name == "plugin.json") ??
+                throw new FileNotFoundException("The zip file does not contain a plugin.json file.");
+
+            using Stream stream = pluginJsonEntry.Open();
+            plugin = JsonSerializer.Deserialize<UserPlugin>(stream);
+            plugin.IcoPath = "Images\\zipfolder.png";
+            plugin.LocalInstallPath = filePath;
+        }
+        catch (Exception e)
+        {
+            API.LogException(ClassName, "Failed to validate zip file", e);
+            API.ShowMsgError(API.GetTranslation("ZipFileNotHavePluginJson"));
+            return;
+        }
+
+        if (API.PluginModified(plugin.ID))
+        {
+            API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), plugin.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+            return;
+        }
+
+        if (Settings.ShowUnknownSourceWarning)
+        {
+            if (!InstallSourceKnown(plugin.Website)
+                && API.ShowMsgBox(string.Format(
+                    API.GetTranslation("InstallFromUnknownSourceSubtitle"), Environment.NewLine),
+                    API.GetTranslation("InstallFromUnknownSourceTitle"),
+                    MessageBoxButton.YesNo) == MessageBoxResult.No)
+                return;
+        }
+
+        await InstallPluginAndCheckRestartAsync(plugin);
+    }
+
+    /// <summary>
+    /// Uninstalls a plugin and restarts the application if required by settings. Prompts user for confirmation and whether to keep plugin settings.
+    /// </summary>
+    /// <param name="oldPlugin">The plugin metadata to uninstall.</param>
+    /// <returns>A Task representing the asynchronous uninstall operation.</returns>
+    public static async Task UninstallPluginAndCheckRestartAsync(PluginMetadata oldPlugin)
+    {
+        if (API.PluginModified(oldPlugin.ID))
+        {
+            API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), oldPlugin.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+            return;
+        }
+
+        if (API.ShowMsgBox(
+            string.Format(
+                API.GetTranslation("UninstallPromptSubtitle"),
+                oldPlugin.Name, oldPlugin.Author, Environment.NewLine),
+            API.GetTranslation("UninstallPromptTitle"),
+            button: MessageBoxButton.YesNo) != MessageBoxResult.Yes) return;
+
+        var removePluginSettings = API.ShowMsgBox(
+            API.GetTranslation("KeepPluginSettingsSubtitle"),
+            API.GetTranslation("KeepPluginSettingsTitle"),
+            button: MessageBoxButton.YesNo) == MessageBoxResult.No;
+
+        try
+        {
+            if (!await API.UninstallPluginAsync(oldPlugin, removePluginSettings))
+            {
+                return;
+            }
+        }
+        catch (Exception e)
+        {
+            API.LogException(ClassName, "Failed to uninstall plugin", e);
+            API.ShowMsgError(API.GetTranslation("ErrorUninstallingPlugin"));
+            return; // don not restart on failure
+        }
+
+        if (Settings.AutoRestartAfterChanging)
+        {
+            API.RestartApp();
+        }
+        else
+        {
+            API.ShowMsg(
+                API.GetTranslation("uninstallbtn"),
+                string.Format(
+                    API.GetTranslation(
+                        "UninstallSuccessNoRestart"),
+                    oldPlugin.Name));
+        }
+    }
+
+    /// <summary>
+    /// Updates a plugin to a new version and restarts the application if required by settings. Prompts user for confirmation and handles download if needed.
+    /// </summary>
+    /// <param name="newPlugin">The new plugin version to install.</param>
+    /// <param name="oldPlugin">The existing plugin metadata to update.</param>
+    /// <returns>A Task representing the asynchronous update operation.</returns>
+    public static async Task UpdatePluginAndCheckRestartAsync(UserPlugin newPlugin, PluginMetadata oldPlugin)
+    {
+        if (API.ShowMsgBox(
+            string.Format(
+                API.GetTranslation("UpdatePromptSubtitle"),
+                oldPlugin.Name, oldPlugin.Author, Environment.NewLine),
+            API.GetTranslation("UpdatePromptTitle"),
+            button: MessageBoxButton.YesNo) != MessageBoxResult.Yes) return;
+
+        try
+        {
+            var filePath = Path.Combine(Path.GetTempPath(), $"{newPlugin.Name}-{newPlugin.Version}.zip");
+
+            using var cts = new CancellationTokenSource();
+
+            if (!newPlugin.IsFromLocalInstallPath)
+            {
+                await DownloadFileAsync(
+                    $"{API.GetTranslation("DownloadingPlugin")} {newPlugin.Name}",
+                    newPlugin.UrlDownload, filePath, cts);
+            }
+            else
+            {
+                filePath = newPlugin.LocalInstallPath;
+            }
+
+            // check if user cancelled download before installing plugin
+            if (cts.IsCancellationRequested)
+            {
+                return;
+            }
+
+            if (!await API.UpdatePluginAsync(oldPlugin, newPlugin, filePath))
+            {
+                return;
+            }
+        }
+        catch (Exception e)
+        {
+            API.LogException(ClassName, "Failed to update plugin", e);
+            API.ShowMsgError(API.GetTranslation("ErrorUpdatingPlugin"));
+            return; // do not restart on failure
+        }
+
+        if (Settings.AutoRestartAfterChanging)
+        {
+            API.RestartApp();
+        }
+        else
+        {
+            API.ShowMsg(
+                API.GetTranslation("updatebtn"),
+                string.Format(
+                    API.GetTranslation(
+                        "UpdateSuccessNoRestart"),
+                    newPlugin.Name));
+        }
+    }
+
+    /// <summary>
+    /// Downloads a file from a URL to a local path, optionally showing a progress box and handling cancellation.
+    /// </summary>
+    /// <param name="progressBoxTitle">The title for the progress box.</param>
+    /// <param name="downloadUrl">The URL to download from.</param>
+    /// <param name="filePath">The local file path to save to.</param>
+    /// <param name="cts">Cancellation token source for cancelling the download.</param>
+    /// <param name="deleteFile">Whether to delete the file if it already exists.</param>
+    /// <param name="showProgress">Whether to show a progress box during download.</param>
+    /// <returns>A Task representing the asynchronous download operation.</returns>
+    private static async Task DownloadFileAsync(string progressBoxTitle, string downloadUrl, string filePath, CancellationTokenSource cts, bool deleteFile = true, bool showProgress = true)
+    {
+        if (deleteFile && File.Exists(filePath))
+            File.Delete(filePath);
+
+        if (showProgress)
+        {
+            var exceptionHappened = false;
+            await API.ShowProgressBoxAsync(progressBoxTitle,
+                async (reportProgress) =>
+                {
+                    if (reportProgress == null)
+                    {
+                        // when reportProgress is null, it means there is exception with the progress box
+                        // so we record it with exceptionHappened and return so that progress box will close instantly
+                        exceptionHappened = true;
+                        return;
+                    }
+                    else
+                    {
+                        await API.HttpDownloadAsync(downloadUrl, filePath, reportProgress, cts.Token).ConfigureAwait(false);
+                    }
+                }, cts.Cancel);
+
+            // if exception happened while downloading and user does not cancel downloading,
+            // we need to redownload the plugin
+            if (exceptionHappened && (!cts.IsCancellationRequested))
+                await API.HttpDownloadAsync(downloadUrl, filePath, token: cts.Token).ConfigureAwait(false);
+        }
+        else
+        {
+            await API.HttpDownloadAsync(downloadUrl, filePath, token: cts.Token).ConfigureAwait(false);
+        }
+    }
+
+    /// <summary>
+    /// Determines if the plugin install source is a known/approved source (e.g., GitHub and matches an existing plugin author).
+    /// </summary>
+    /// <param name="url">The URL to check.</param>
+    /// <returns>True if the source is known, otherwise false.</returns>
+    private static bool InstallSourceKnown(string url)
+    {
+        if (string.IsNullOrEmpty(url))
+            return false;
+
+        var pieces = url.Split('/');
+
+        if (pieces.Length < 4)
+            return false;
+
+        var author = pieces[3];
+        var acceptedHost = "github.com";
+        var acceptedSource = "https://github.com";
+        var constructedUrlPart = string.Format("{0}/{1}/", acceptedSource, author);
+
+        if (!Uri.TryCreate(url, UriKind.Absolute, out var uri) || uri.Host != acceptedHost)
+            return false;
+
+        return API.GetAllPlugins().Any(x =>
+            !string.IsNullOrEmpty(x.Metadata.Website) &&
+            x.Metadata.Website.StartsWith(constructedUrlPart)
+        );
+    }
+}

Flow.Launcher.Core/Plugin/PluginManager.cs

@@ -20,7 +20,7 @@ using ISavable = Flow.Launcher.Plugin.ISavable;
 namespace Flow.Launcher.Core.Plugin
 {
     /// <summary>
-    /// The entry for managing Flow Launcher plugins
+    /// Class for co-ordinating and managing all plugin lifecycle.
     /// </summary>
     public static class PluginManager
     {
@@ -693,8 +693,13 @@ namespace Flow.Launcher.Core.Plugin
         private static bool SameOrLesserPluginVersionExists(string metadataPath)
         {
             var newMetadata = JsonSerializer.Deserialize<PluginMetadata>(File.ReadAllText(metadataPath));
+
+            if (!Version.TryParse(newMetadata.Version, out var newVersion))
+                return true; // If version is not valid, we assume it is lesser than any existing version
+
             return AllPlugins.Any(x => x.Metadata.ID == newMetadata.ID
-                          && newMetadata.Version.CompareTo(x.Metadata.Version) <= 0);
+                                       && Version.TryParse(x.Metadata.Version, out var version)
+                                       && newVersion <= version);
         }
 
         #region Public functions
@@ -704,33 +709,46 @@ namespace Flow.Launcher.Core.Plugin
             return ModifiedPlugins.Contains(id);
         }
 
-        public static async Task UpdatePluginAsync(PluginMetadata existingVersion, UserPlugin newVersion, string zipFilePath)
+        public static async Task<bool> UpdatePluginAsync(PluginMetadata existingVersion, UserPlugin newVersion, string zipFilePath)
         {
-            InstallPlugin(newVersion, zipFilePath, checkModified: false);
-            await UninstallPluginAsync(existingVersion, removePluginFromSettings: false, removePluginSettings: false, checkModified: false);
+            if (PluginModified(existingVersion.ID))
+            {
+                API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), existingVersion.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+                return false;
+            }
+
+            var installSuccess = InstallPlugin(newVersion, zipFilePath, checkModified: false);
+            if (!installSuccess) return false;
+
+            var uninstallSuccess = await UninstallPluginAsync(existingVersion, removePluginFromSettings: false, removePluginSettings: false, checkModified: false);
+            if (!uninstallSuccess) return false;
+
             ModifiedPlugins.Add(existingVersion.ID);
+            return true;
         }
 
-        public static void InstallPlugin(UserPlugin plugin, string zipFilePath)
+        public static bool InstallPlugin(UserPlugin plugin, string zipFilePath)
         {
-            InstallPlugin(plugin, zipFilePath, checkModified: true);
+            return InstallPlugin(plugin, zipFilePath, checkModified: true);
         }
 
-        public static async Task UninstallPluginAsync(PluginMetadata plugin, bool removePluginSettings = false)
+        public static async Task<bool> UninstallPluginAsync(PluginMetadata plugin, bool removePluginSettings = false)
         {
-            await UninstallPluginAsync(plugin, removePluginFromSettings: true, removePluginSettings: removePluginSettings, checkModified: true);
+            return await UninstallPluginAsync(plugin, removePluginFromSettings: true, removePluginSettings: removePluginSettings, checkModified: true);
         }
 
         #endregion
 
         #region Internal functions
 
-        internal static void InstallPlugin(UserPlugin plugin, string zipFilePath, bool checkModified)
+        internal static bool InstallPlugin(UserPlugin plugin, string zipFilePath, bool checkModified)
         {
             if (checkModified && PluginModified(plugin.ID))
             {
-                // Distinguish exception from installing same or less version
-                throw new ArgumentException($"Plugin {plugin.Name} {plugin.ID} has been modified.", nameof(plugin));
+                API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), plugin.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+                return false;
             }
 
             // Unzip plugin files to temp folder
@@ -748,12 +766,16 @@ namespace Flow.Launcher.Core.Plugin
 
             if (string.IsNullOrEmpty(metadataJsonFilePath) || string.IsNullOrEmpty(pluginFolderPath))
             {
-                throw new FileNotFoundException($"Unable to find plugin.json from the extracted zip file, or this path {pluginFolderPath} does not exist");
+                API.ShowMsgError(string.Format(API.GetTranslation("failedToInstallPluginTitle"), plugin.Name),
+                    string.Format(API.GetTranslation("fileNotFoundMessage"), pluginFolderPath));
+                return false;
             }
 
             if (SameOrLesserPluginVersionExists(metadataJsonFilePath))
             {
-                throw new InvalidOperationException($"A plugin with the same ID and version already exists, or the version is greater than this downloaded plugin {plugin.Name}");
+                API.ShowMsgError(string.Format(API.GetTranslation("failedToInstallPluginTitle"), plugin.Name),
+                    API.GetTranslation("pluginExistAlreadyMessage"));
+                return false;
             }
 
             var folderName = string.IsNullOrEmpty(plugin.Version) ? $"{plugin.Name}-{Guid.NewGuid()}" : $"{plugin.Name}-{plugin.Version}";
@@ -797,13 +819,17 @@ namespace Flow.Launcher.Core.Plugin
             {
                 ModifiedPlugins.Add(plugin.ID);
             }
+
+            return true;
         }
 
-        internal static async Task UninstallPluginAsync(PluginMetadata plugin, bool removePluginFromSettings, bool removePluginSettings, bool checkModified)
+        internal static async Task<bool> UninstallPluginAsync(PluginMetadata plugin, bool removePluginFromSettings, bool removePluginSettings, bool checkModified)
         {
             if (checkModified && PluginModified(plugin.ID))
             {
-                throw new ArgumentException($"Plugin {plugin.Name} has been modified");
+                API.ShowMsgError(string.Format(API.GetTranslation("pluginModifiedAlreadyTitle"), plugin.Name),
+                    API.GetTranslation("pluginModifiedAlreadyMessage"));
+                return false;
             }
 
             if (removePluginSettings || removePluginFromSettings)
@@ -872,6 +898,8 @@ namespace Flow.Launcher.Core.Plugin
             {
                 ModifiedPlugins.Add(plugin.ID);
             }
+
+            return true;
         }
 
         #endregion

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -398,6 +398,9 @@ namespace Flow.Launcher.Infrastructure.UserSettings
         
         public int MaxHistoryResultsToShowForHomePage { get; set; } = 5;
 
+        public bool AutoRestartAfterChanging { get; set; } = false;
+        public bool ShowUnknownSourceWarning { get; set; } = true;
+
         public int CustomExplorerIndex { get; set; } = 0;
 
         [JsonIgnore]

Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs

@@ -23,8 +23,8 @@ namespace Flow.Launcher.Plugin
         /// </summary>
         /// <param name="query">query text</param>
         /// <param name="requery">
-        /// Force requery. By default, Flow Launcher will not fire query if your query is same with existing one. 
-        /// Set this to <see langword="true"/> to force Flow Launcher requerying
+        /// Force requery. By default, Flow Launcher will not fire query if your query is same with existing one.
+        /// Set this to <see langword="true"/> to force Flow Launcher re-querying
         /// </param>
         void ChangeQuery(string query, bool requery = false);
 
@@ -49,7 +49,7 @@ namespace Flow.Launcher.Plugin
         /// </summary>
         /// <param name="text">Text to save on clipboard</param>
         /// <param name="directCopy">When true it will directly copy the file/folder from the path specified in text</param>
-        /// <param name="showDefaultNotification">Whether to show the default notification from this method after copy is done. 
+        /// <param name="showDefaultNotification">Whether to show the default notification from this method after copy is done.
         ///                                         It will show file/folder/text is copied successfully.
         ///                                         Turn this off to show your own notification after copy is done.</param>>
         public void CopyToClipboard(string text, bool directCopy = false, bool showDefaultNotification = true);
@@ -65,7 +65,7 @@ namespace Flow.Launcher.Plugin
         void SavePluginSettings();
 
         /// <summary>
-        /// Reloads any Plugins that have the 
+        /// Reloads any Plugins that have the
         /// IReloadable implemented. It refeshes
         /// Plugin's in memory data with new content
         /// added by user.
@@ -97,7 +97,7 @@ namespace Flow.Launcher.Plugin
         /// Show the MainWindow when hiding
         /// </summary>
         void ShowMainWindow();
-        
+
         /// <summary>
         /// Focus the query text box in the main window
         /// </summary>
@@ -115,7 +115,7 @@ namespace Flow.Launcher.Plugin
         bool IsMainWindowVisible();
 
         /// <summary>
-        /// Invoked when the visibility of the main window has changed. Currently, the plugin will continue to be subscribed even if it is turned off. 
+        /// Invoked when the visibility of the main window has changed. Currently, the plugin will continue to be subscribed even if it is turned off.
         /// </summary>
         event VisibilityChangedEventHandler VisibilityChanged;
 
@@ -171,7 +171,7 @@ namespace Flow.Launcher.Plugin
         string GetTranslation(string key);
 
         /// <summary>
-        /// Get all loaded plugins 
+        /// Get all loaded plugins
         /// </summary>
         /// <returns></returns>
         List<PluginPair> GetAllPlugins();
@@ -229,7 +229,7 @@ namespace Flow.Launcher.Plugin
         MatchResult FuzzySearch(string query, string stringToCompare);
 
         /// <summary>
-        /// Http download the spefic url and return as string
+        /// Http download the specific url and return as string
         /// </summary>
         /// <param name="url">URL to call Http Get</param>
         /// <param name="token">Cancellation Token</param>
@@ -237,7 +237,7 @@ namespace Flow.Launcher.Plugin
         Task<string> HttpGetStringAsync(string url, CancellationToken token = default);
 
         /// <summary>
-        /// Http download the spefic url and return as stream
+        /// Http download the specific url and return as stream
         /// </summary>
         /// <param name="url">URL to call Http Get</param>
         /// <param name="token">Cancellation Token</param>
@@ -305,8 +305,8 @@ namespace Flow.Launcher.Plugin
         void LogError(string className, string message, [CallerMemberName] string methodName = "");
 
         /// <summary>
-        /// Log an Exception. Will throw if in debug mode so developer will be aware, 
-        /// otherwise logs the eror message. This is the primary logging method used for Flow 
+        /// Log an Exception. Will throw if in debug mode so developer will be aware,
+        /// otherwise logs the eror message. This is the primary logging method used for Flow
         /// </summary>
         void LogException(string className, string message, Exception e, [CallerMemberName] string methodName = "");
 
@@ -393,7 +393,7 @@ namespace Flow.Launcher.Plugin
 
         /// <summary>
         /// Reloads the query.
-        /// When current results are from context menu or history, it will go back to query results before requerying.
+        /// When current results are from context menu or history, it will go back to query results before re-querying.
         /// </summary>
         /// <param name="reselect">Choose the first result after reload if true; keep the last selected result if false. Default is true.</param>
         public void ReQuery(bool reselect = true);
@@ -547,8 +547,10 @@ namespace Flow.Launcher.Plugin
         /// <param name="zipFilePath">
         /// Path to the zip file containing the plugin. It will be unzipped to the temporary directory, removed and installed.
         /// </param>
-        /// <returns></returns>
-        public Task UpdatePluginAsync(PluginMetadata pluginMetadata, UserPlugin plugin, string zipFilePath);
+        /// <returns>
+        /// True if the plugin is updated successfully, false otherwise.
+        /// </returns>
+        public Task<bool> UpdatePluginAsync(PluginMetadata pluginMetadata, UserPlugin plugin, string zipFilePath);
 
         /// <summary>
         /// Install a plugin. By default will remove the zip file if installation is from url,
@@ -558,7 +560,10 @@ namespace Flow.Launcher.Plugin
         /// <param name="zipFilePath">
         /// Path to the zip file containing the plugin. It will be unzipped to the temporary directory, removed and installed.
         /// </param>
-        public void InstallPlugin(UserPlugin plugin, string zipFilePath);
+        /// <returns>
+        /// True if the plugin is installed successfully, false otherwise.
+        /// </returns>
+        public bool InstallPlugin(UserPlugin plugin, string zipFilePath);
 
         /// <summary>
         /// Uninstall a plugin
@@ -567,8 +572,10 @@ namespace Flow.Launcher.Plugin
         /// <param name="removePluginSettings">
         /// Plugin has their own settings. If this is set to true, the plugin settings will be removed.
         /// </param>
-        /// <returns></returns>
-        public Task UninstallPluginAsync(PluginMetadata pluginMetadata, bool removePluginSettings = false);
+        /// <returns>
+        /// True if the plugin is updated successfully, false otherwise.
+        /// </returns>
+        public Task<bool> UninstallPluginAsync(PluginMetadata pluginMetadata, bool removePluginSettings = false);
 
         /// <summary>
         /// Log debug message of the time taken to execute a method
@@ -603,7 +610,7 @@ namespace Flow.Launcher.Plugin
         bool IsApplicationDarkTheme();
 
         /// <summary>
-        /// Invoked when the actual theme of the application has changed. Currently, the plugin will continue to be subscribed even if it is turned off. 
+        /// Invoked when the actual theme of the application has changed. Currently, the plugin will continue to be subscribed even if it is turned off.
         /// </summary>
         event ActualApplicationThemeChangedEventHandler ActualApplicationThemeChanged;
     }

Flow.Launcher/App.xaml.cs

@@ -211,6 +211,9 @@ namespace Flow.Launcher
 
                 Http.Proxy = _settings.Proxy;
 
+                // Initialize plugin manifest before initializing plugins so that they can use the manifest instantly
+                await API.UpdatePluginManifestAsync();
+
                 await PluginManager.InitializePluginsAsync();
 
                 // Change language after all plugins are initialized because we need to update plugin title based on their api

Flow.Launcher/Languages/en.xaml

@@ -135,6 +135,10 @@
     <system:String x:Key="homeToggleBoxToolTip">This can only be edited if plugin supports Home feature and Home Page is enabled.</system:String>
     <system:String x:Key="showAtTopmost">Show Search Window at Foremost</system:String>
     <system:String x:Key="showAtTopmostToolTip">Overrides other programs' 'Always on Top' setting and displays Flow in the foremost position.</system:String>
+    <system:String x:Key="autoRestartAfterChanging">Restart after modifying plugin via Plugin Store</system:String>
+    <system:String x:Key="autoRestartAfterChangingToolTip">Restart Flow Launcher automatically after installing/uninstalling/updating plugin via Plugin Store</system:String>
+    <system:String x:Key="showUnknownSourceWarning">Show unknown source warning</system:String>
+    <system:String x:Key="showUnknownSourceWarningToolTip">Show warning when installing plugins from unknown sources</system:String>
 
     <!--  Setting Plugin  -->
     <system:String x:Key="searchplugin">Search Plugin</system:String>
@@ -173,6 +177,12 @@
     <system:String x:Key="failedToRemovePluginSettingsMessage">Plugins: {0} - Fail to remove plugin settings files, please remove them manually</system:String>
     <system:String x:Key="failedToRemovePluginCacheTitle">Fail to remove plugin cache</system:String>
     <system:String x:Key="failedToRemovePluginCacheMessage">Plugins: {0} - Fail to remove plugin cache files, please remove them manually</system:String>
+    <system:String x:Key="pluginModifiedAlreadyTitle">{0} modified already</system:String>
+    <system:String x:Key="pluginModifiedAlreadyMessage">Please restart Flow before making any further changes</system:String>
+    <system:String x:Key="failedToInstallPluginTitle">Fail to install {0}</system:String>
+    <system:String x:Key="failedToUninstallPluginTitle">Fail to uninstall {0}</system:String>
+    <system:String x:Key="fileNotFoundMessage">Unable to find plugin.json from the extracted zip file, or this path {0} does not exist</system:String>
+    <system:String x:Key="pluginExistAlreadyMessage">A plugin with the same ID and version already exists, or the version is greater than this downloaded plugin</system:String>
 
     <!--  Setting Plugin Store  -->
     <system:String x:Key="pluginStore">Plugin Store</system:String>
@@ -188,6 +198,28 @@
     <system:String x:Key="LabelNew">New Version</system:String>
     <system:String x:Key="LabelNewToolTip">This plugin has been updated within the last 7 days</system:String>
     <system:String x:Key="LabelUpdateToolTip">New Update is Available</system:String>
+    <system:String x:Key="ErrorInstallingPlugin">Error installing plugin</system:String>
+    <system:String x:Key="ErrorUninstallingPlugin">Error uninstalling plugin</system:String>
+    <system:String x:Key="ErrorUpdatingPlugin">Error updating plugin</system:String>
+    <system:String x:Key="KeepPluginSettingsTitle">Keep plugin settings</system:String>
+    <system:String x:Key="KeepPluginSettingsSubtitle">Do you want to keep the settings of the plugin for the next usage?</system:String>
+    <system:String x:Key="InstallSuccessNoRestart">Plugin {0} successfully installed. Please restart Flow.</system:String>
+    <system:String x:Key="UninstallSuccessNoRestart">Plugin {0} successfully uninstalled. Please restart Flow.</system:String>
+    <system:String x:Key="UpdateSuccessNoRestart">Plugin {0} successfully updated. Please restart Flow.</system:String>
+    <system:String x:Key="InstallPromptTitle">Plugin install</system:String>
+    <system:String x:Key="InstallPromptSubtitle">{0} by {1} {2}{2}Would you like to install this plugin?</system:String>
+    <system:String x:Key="UninstallPromptTitle">Plugin uninstall</system:String>
+    <system:String x:Key="UninstallPromptSubtitle">{0} by {1} {2}{2}Would you like to uninstall this plugin?</system:String>
+    <system:String x:Key="UpdatePromptTitle">Plugin update</system:String>
+    <system:String x:Key="UpdatePromptSubtitle">{0} by {1} {2}{2}Would you like to update this plugin?</system:String>
+    <system:String x:Key="DownloadingPlugin">Downloading plugin</system:String>
+    <system:String x:Key="AutoRestartAfterChange">Automatically restart after installing/uninstalling/updating plugins in plugin store</system:String>
+    <system:String x:Key="ZipFileNotHavePluginJson">Zip file does not have a valid plugin.json configuration</system:String>
+    <system:String x:Key="InstallFromUnknownSourceTitle">Installing from an unknown source</system:String>
+    <system:String x:Key="InstallFromUnknownSourceSubtitle">This plugin is from an unknown source and it may contain potential risks!{0}{0}Please ensure you understand where this plugin is from and that it is safe.{0}{0}Would you like to continue still?{0}{0}(You can switch off this warning in general section of setting window)</system:String>
+    <system:String x:Key="ZipFiles">Zip files</system:String>
+    <system:String x:Key="SelectZipFile">Please select zip file</system:String>
+    <system:String x:Key="installLocalPluginTooltip">Install plugin from local path</system:String>
 
     <!--  Setting Theme  -->
     <system:String x:Key="theme">Theme</system:String>

Flow.Launcher/ProgressBoxEx.xaml.cs

@@ -19,32 +19,32 @@ namespace Flow.Launcher
 
         public static async Task ShowAsync(string caption, Func<Action<double>, Task> reportProgressAsync, Action cancelProgress = null)
         {
-            ProgressBoxEx prgBox = null;
+            ProgressBoxEx progressBox = null;
             try
             {
                 if (!Application.Current.Dispatcher.CheckAccess())
                 {
                     await Application.Current.Dispatcher.InvokeAsync(() =>
                     {
-                        prgBox = new ProgressBoxEx(cancelProgress)
+                        progressBox = new ProgressBoxEx(cancelProgress)
                         {
                             Title = caption
                         };
-                        prgBox.TitleTextBlock.Text = caption;
-                        prgBox.Show();
+                        progressBox.TitleTextBlock.Text = caption;
+                        progressBox.Show();
                     });
                 }
                 else
                 {
-                    prgBox = new ProgressBoxEx(cancelProgress)
+                    progressBox = new ProgressBoxEx(cancelProgress)
                     {
                         Title = caption
                     };
-                    prgBox.TitleTextBlock.Text = caption;
-                    prgBox.Show();
+                    progressBox.TitleTextBlock.Text = caption;
+                    progressBox.Show();
                 }
 
-                await reportProgressAsync(prgBox.ReportProgress).ConfigureAwait(false);
+                await reportProgressAsync(progressBox.ReportProgress).ConfigureAwait(false);
             }
             catch (Exception e)
             {
@@ -58,12 +58,12 @@ namespace Flow.Launcher
                 {
                     await Application.Current.Dispatcher.InvokeAsync(() =>
                     {
-                        prgBox?.Close();
+                        progressBox?.Close();
                     });
                 }
                 else
                 {
-                    prgBox?.Close();
+                    progressBox?.Close();
                 }
             }
         }

Flow.Launcher/PublicAPIInstance.cs

@@ -567,13 +567,13 @@ namespace Flow.Launcher
 
         public bool PluginModified(string id) => PluginManager.PluginModified(id);
 
-        public Task UpdatePluginAsync(PluginMetadata pluginMetadata, UserPlugin plugin, string zipFilePath) =>
+        public Task<bool> UpdatePluginAsync(PluginMetadata pluginMetadata, UserPlugin plugin, string zipFilePath) =>
             PluginManager.UpdatePluginAsync(pluginMetadata, plugin, zipFilePath);
 
-        public void InstallPlugin(UserPlugin plugin, string zipFilePath) =>
+        public bool InstallPlugin(UserPlugin plugin, string zipFilePath) =>
             PluginManager.InstallPlugin(plugin, zipFilePath);
 
-        public Task UninstallPluginAsync(PluginMetadata pluginMetadata, bool removePluginSettings = false) =>
+        public Task<bool> UninstallPluginAsync(PluginMetadata pluginMetadata, bool removePluginSettings = false) =>
             PluginManager.UninstallPluginAsync(pluginMetadata, removePluginSettings);
 
         public long StopwatchLogDebug(string className, string message, Action action, [CallerMemberName] string methodName = "") =>

Flow.Launcher/SettingPages/ViewModels/SettingsPanePluginStoreViewModel.cs

@@ -1,7 +1,9 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.Input;
+using Flow.Launcher.Core.Plugin;
 using Flow.Launcher.Plugin;
 using Flow.Launcher.ViewModel;
 
@@ -96,6 +98,35 @@ public partial class SettingsPanePluginStoreViewModel : BaseModel
         }
     }
 
+    [RelayCommand]
+    private async Task InstallPluginAsync()
+    {
+        var file = GetFileFromDialog(
+            App.API.GetTranslation("SelectZipFile"),
+            $"{App.API.GetTranslation("ZipFiles")} (*.zip)|*.zip");
+
+        if (!string.IsNullOrEmpty(file))
+            await PluginInstaller.InstallPluginAndCheckRestartAsync(file);
+    }
+
+    private static string GetFileFromDialog(string title, string filter = "")
+    {
+        var dlg = new Microsoft.Win32.OpenFileDialog
+        {
+            InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile) + "\\Downloads",
+            Multiselect = false,
+            CheckFileExists = true,
+            CheckPathExists = true,
+            Title = title,
+            Filter = filter
+        };
+        var result = dlg.ShowDialog();
+        if (result == true)
+            return dlg.FileName;
+
+        return string.Empty;
+    }
+
     public bool SatisfiesFilter(PluginStoreItemViewModel plugin)
     {
         // Check plugin language

Flow.Launcher/SettingPages/Views/SettingsPaneGeneral.xaml

@@ -225,6 +225,30 @@
                 </cc:Card>
             </cc:CardGroup>
 
+            <cc:CardGroup Margin="0 14 0 0">
+                <cc:Card
+                    Title="{DynamicResource autoRestartAfterChanging}"
+                    Icon="&#xF83E;"
+                    Sub="{DynamicResource autoRestartAfterChangingToolTip}"
+                    Type="First">
+                    <ui:ToggleSwitch
+                        IsOn="{Binding Settings.AutoRestartAfterChanging}"
+                        OffContent="{DynamicResource disable}"
+                        OnContent="{DynamicResource enable}" />
+                </cc:Card>
+
+                <cc:Card
+                    Title="{DynamicResource showUnknownSourceWarning}"
+                    Icon="&#xE7BA;"
+                    Sub="{DynamicResource showUnknownSourceWarningToolTip}"
+                    Type="Last">
+                    <ui:ToggleSwitch
+                        IsOn="{Binding Settings.ShowUnknownSourceWarning}"
+                        OffContent="{DynamicResource disable}"
+                        OnContent="{DynamicResource enable}" />
+                </cc:Card>
+            </cc:CardGroup>
+
             <cc:ExCard
                 Title="{DynamicResource searchDelay}"
                 Margin="0 14 0 0"

Flow.Launcher/SettingPages/Views/SettingsPanePluginStore.xaml

@@ -92,6 +92,13 @@
                         </ui:MenuFlyout>
                     </ui:FlyoutService.Flyout>
                 </Button>
+                <Button
+                    Height="34"
+                    Margin="0 0 10 0"
+                    Command="{Binding InstallPluginCommand}"
+                    ToolTip="{DynamicResource installLocalPluginTooltip}">
+                    <ui:FontIcon FontSize="14" Glyph="&#xE8DA;" />
+                </Button>
                 <TextBox
                     Name="PluginStoreFilterTextbox"
                     Width="150"

Flow.Launcher/ViewModel/PluginStoreItemViewModel.cs

@@ -1,5 +1,5 @@
 using System;
-using System.Linq;
+using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.Input;
 using Flow.Launcher.Core.Plugin;
 using Flow.Launcher.Plugin;
@@ -9,27 +9,28 @@ namespace Flow.Launcher.ViewModel
 {
     public partial class PluginStoreItemViewModel : BaseModel
     {
-        private PluginPair PluginManagerData => PluginManager.GetPluginForId("9f8f9b14-2518-4907-b211-35ab6290dee7");
+        private readonly UserPlugin _newPlugin;
+        private readonly PluginPair _oldPluginPair;
+
         public PluginStoreItemViewModel(UserPlugin plugin)
         {
-            _plugin = plugin;
+            _newPlugin = plugin;
+            _oldPluginPair = PluginManager.GetPluginForId(plugin.ID);
         }
 
-        private UserPlugin _plugin;
+        public string ID => _newPlugin.ID;
+        public string Name => _newPlugin.Name;
+        public string Description => _newPlugin.Description;
+        public string Author => _newPlugin.Author;
+        public string Version => _newPlugin.Version;
+        public string Language => _newPlugin.Language;
+        public string Website => _newPlugin.Website;
+        public string UrlDownload => _newPlugin.UrlDownload;
+        public string UrlSourceCode => _newPlugin.UrlSourceCode;
+        public string IcoPath => _newPlugin.IcoPath;
 
-        public string ID => _plugin.ID;
-        public string Name => _plugin.Name;
-        public string Description => _plugin.Description;
-        public string Author => _plugin.Author;
-        public string Version => _plugin.Version;
-        public string Language => _plugin.Language;
-        public string Website => _plugin.Website;
-        public string UrlDownload => _plugin.UrlDownload;
-        public string UrlSourceCode => _plugin.UrlSourceCode;
-        public string IcoPath => _plugin.IcoPath;
-
-        public bool LabelInstalled => PluginManager.GetPluginForId(_plugin.ID) != null;
-        public bool LabelUpdate => LabelInstalled && new Version(_plugin.Version) > new Version(PluginManager.GetPluginForId(_plugin.ID).Metadata.Version);
+        public bool LabelInstalled => _oldPluginPair != null;
+        public bool LabelUpdate => LabelInstalled && new Version(_newPlugin.Version) > new Version(_oldPluginPair.Metadata.Version);
 
         internal const string None = "None";
         internal const string RecentlyUpdated = "RecentlyUpdated";
@@ -41,15 +42,15 @@ namespace Flow.Launcher.ViewModel
             get
             {
                 string category = None;
-                if (DateTime.Now - _plugin.LatestReleaseDate < TimeSpan.FromDays(7))
+                if (DateTime.Now - _newPlugin.LatestReleaseDate < TimeSpan.FromDays(7))
                 {
                     category = RecentlyUpdated;
                 }
-                if (DateTime.Now - _plugin.DateAdded < TimeSpan.FromDays(7))
+                if (DateTime.Now - _newPlugin.DateAdded < TimeSpan.FromDays(7))
                 {
                     category = NewRelease;
                 }
-                if (PluginManager.GetPluginForId(_plugin.ID) != null)
+                if (_oldPluginPair != null)
                 {
                     category = Installed;
                 }
@@ -59,11 +60,22 @@ namespace Flow.Launcher.ViewModel
         }
 
         [RelayCommand]
-        private void ShowCommandQuery(string action)
+        private async Task ShowCommandQueryAsync(string action)
         {
-            var actionKeyword = PluginManagerData.Metadata.ActionKeywords.Any() ? PluginManagerData.Metadata.ActionKeywords[0] + " " : String.Empty;
-            App.API.ChangeQuery($"{actionKeyword}{action} {_plugin.Name}");
-            App.API.ShowMainWindow();
+            switch (action)
+            {
+                case "install":
+                    await PluginInstaller.InstallPluginAndCheckRestartAsync(_newPlugin);
+                    break;
+                case "uninstall":
+                    await PluginInstaller.UninstallPluginAndCheckRestartAsync(_oldPluginPair.Metadata);
+                    break;
+                case "update":
+                    await PluginInstaller.UpdatePluginAndCheckRestartAsync(_newPlugin, _oldPluginPair.Metadata);
+                    break;
+                default:
+                    break;
+            }
         }
     }
 }

Flow.Launcher/ViewModel/PluginViewModel.cs

@@ -1,5 +1,4 @@
-using System.Linq;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
@@ -32,21 +31,6 @@ namespace Flow.Launcher.ViewModel
             }
         }
 
-        private static string PluginManagerActionKeyword
-        {
-            get
-            {
-                var keyword = PluginManager
-                    .GetPluginForId("9f8f9b14-2518-4907-b211-35ab6290dee7")
-                    .Metadata.ActionKeywords.FirstOrDefault();
-                return keyword switch
-                {
-                    null or "*" => string.Empty,
-                    _ => keyword
-                };
-            }
-        }
-
         private async Task LoadIconAsync()
         {
             Image = await App.API.LoadImageAsync(PluginPair.Metadata.IcoPath);
@@ -186,10 +170,9 @@ namespace Flow.Launcher.ViewModel
         }
 
         [RelayCommand]
-        private void OpenDeletePluginWindow()
+        private async Task OpenDeletePluginWindowAsync()
         {
-            App.API.ChangeQuery($"{PluginManagerActionKeyword} uninstall {PluginPair.Metadata.Name}".Trim(), true);
-            App.API.ShowMainWindow();
+            await PluginInstaller.UninstallPluginAndCheckRestartAsync(PluginPair.Metadata);
         }
 
         [RelayCommand]

Flow.Launcher/ViewModel/SelectBrowserViewModel.cs

@@ -1,6 +1,5 @@
 using System.Collections.ObjectModel;
 using System.Linq;
-using System.Windows;
 using CommunityToolkit.Mvvm.Input;
 using Flow.Launcher.Infrastructure.UserSettings;
 using Flow.Launcher.Plugin;

Plugins/Flow.Launcher.Plugin.PluginsManager/Languages/en.xaml

@@ -45,10 +45,15 @@
     <system:String x:Key="plugin_pluginsmanager_update_success_no_restart">Plugin {0} successfully updated. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_update_all_success_no_restart">{0} plugins successfully updated. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_plugin_modified_error">Plugin {0} has already been modified. Please restart Flow before making any further changes.</system:String>
+    <system:String x:Key="plugin_pluginsmanager_plugin_modified_error_title">{0} modified already</system:String>
+    <system:String x:Key="plugin_pluginsmanager_plugin_modified_error_message">Please restart Flow before making any further changes</system:String>
+
+    <system:String x:Key="plugin_pluginsmanager_invalid_zip_title">Invalid zip installer file</system:String>
+    <system:String x:Key="plugin_pluginsmanager_invalid_zip_subtitle">Please check if there is a plugin.json in {0}</system:String>
 
     <!--  Plugin Infos  -->
     <system:String x:Key="plugin_pluginsmanager_plugin_name">Plugins Manager</system:String>
-    <system:String x:Key="plugin_pluginsmanager_plugin_description">Management of installing, uninstalling or updating Flow Launcher plugins</system:String>
+    <system:String x:Key="plugin_pluginsmanager_plugin_description">Install, uninstall or update Flow Launcher plugins via the search window</system:String>
     <system:String x:Key="plugin_pluginsmanager_unknown_author">Unknown Author</system:String>
 
     <!--  Context menu items  -->
@@ -63,5 +68,5 @@
 
     <!--  Settings menu items  -->
     <system:String x:Key="plugin_pluginsmanager_plugin_settings_unknown_source">Install from unknown source warning</system:String>
-    <system:String x:Key="plugin_pluginsmanager_plugin_settings_auto_restart">Automatically restart Flow Launcher after installing/uninstalling/updating plugins</system:String>
+    <system:String x:Key="plugin_pluginsmanager_plugin_settings_auto_restart">Restart Flow Launcher automatically after installing/uninstalling/updating plugin via Plugins Manager</system:String>
 </ResourceDictionary>

Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs

@@ -114,6 +114,14 @@ namespace Flow.Launcher.Plugin.PluginsManager
                 return;
             }
 
+            if (Context.API.PluginModified(plugin.ID))
+            {
+                Context.API.ShowMsgError(
+                    string.Format(Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_title"), plugin.Name),
+                    Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_message"));
+                return;
+            }
+
             string message;
             if (Settings.AutoRestartAfterChanging)
             {
@@ -158,7 +166,8 @@ namespace Flow.Launcher.Plugin.PluginsManager
                 if (cts.IsCancellationRequested)
                     return;
                 else
-                    Install(plugin, filePath);
+                    if (!Install(plugin, filePath))
+                        return;
             }
             catch (HttpRequestException e)
             {
@@ -196,7 +205,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
             }
         }
 
-        private async Task DownloadFileAsync(string prgBoxTitle, string downloadUrl, string filePath, CancellationTokenSource cts, bool deleteFile = true, bool showProgress = true)
+        private async Task DownloadFileAsync(string progressBoxTitle, string downloadUrl, string filePath, CancellationTokenSource cts, bool deleteFile = true, bool showProgress = true)
         {
             if (deleteFile && File.Exists(filePath))
                 File.Delete(filePath);
@@ -204,12 +213,12 @@ namespace Flow.Launcher.Plugin.PluginsManager
             if (showProgress)
             {
                 var exceptionHappened = false;
-                await Context.API.ShowProgressBoxAsync(prgBoxTitle,
+                await Context.API.ShowProgressBoxAsync(progressBoxTitle,
                     async (reportProgress) =>
                     {
                         if (reportProgress == null)
                         {
-                            // when reportProgress is null, it means there is expcetion with the progress box
+                            // when reportProgress is null, it means there is exception with the progress box
                             // so we record it with exceptionHappened and return so that progress box will close instantly
                             exceptionHappened = true;
                             return;
@@ -242,6 +251,18 @@ namespace Flow.Launcher.Plugin.PluginsManager
             if (FilesFolders.IsZipFilePath(search, checkFileExists: true))
             {
                 pluginFromLocalPath = Utilities.GetPluginInfoFromZip(search);
+
+                if (pluginFromLocalPath == null) return new List<Result>
+                {
+                    new()
+                    {
+                        Title = Context.API.GetTranslation("plugin_pluginsmanager_invalid_zip_title"),
+                        SubTitle = string.Format(Context.API.GetTranslation("plugin_pluginsmanager_invalid_zip_subtitle"),
+                            search),
+                        IcoPath = icoPath
+                    }
+                };
+
                 pluginFromLocalPath.LocalInstallPath = search;
                 updateFromLocalPath = true;
             }
@@ -261,6 +282,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
                 select
                     new
                     {
+                        existingPlugin.Metadata.ID,
                         pluginUpdateSource.Name,
                         pluginUpdateSource.Author,
                         CurrentVersion = existingPlugin.Metadata.Version,
@@ -290,6 +312,14 @@ namespace Flow.Launcher.Plugin.PluginsManager
                         IcoPath = x.IcoPath,
                         Action = e =>
                         {
+                            if (Context.API.PluginModified(x.ID))
+                            {
+                                Context.API.ShowMsgError(
+                                    string.Format(Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_title"), x.Name),
+                                    Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_message"));
+                                return false;
+                            }
+
                             string message;
                             if (Settings.AutoRestartAfterChanging)
                             {
@@ -340,8 +370,11 @@ namespace Flow.Launcher.Plugin.PluginsManager
                                     }
                                     else
                                     {
-                                        await Context.API.UpdatePluginAsync(x.PluginExistingMetadata, x.PluginNewUserPlugin,
-                                            downloadToFilePath);
+                                        if (!await Context.API.UpdatePluginAsync(x.PluginExistingMetadata, x.PluginNewUserPlugin,
+                                            downloadToFilePath))
+                                        {
+                                            return;
+                                        }
 
                                         if (Settings.AutoRestartAfterChanging)
                                         {
@@ -409,6 +442,14 @@ namespace Flow.Launcher.Plugin.PluginsManager
                     IcoPath = icoPath,
                     AsyncAction = async e =>
                     {
+                        if (resultsForUpdate.All(x => Context.API.PluginModified(x.ID)))
+                        {
+                            Context.API.ShowMsgError(Context.API.GetTranslation("plugin_pluginsmanager_install_error_title"),
+                                string.Format(Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error"),
+                                    string.Join(" ", resultsForUpdate.Select(x => x.Name))));
+                            return false;
+                        }
+
                         string message;
                         if (Settings.AutoRestartAfterChanging)
                         {
@@ -430,6 +471,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
                             return false;
                         }
 
+                        var anyPluginSuccess = false;
                         await Task.WhenAll(resultsForUpdate.Select(async plugin =>
                         {
                             var downloadToFilePath = Path.Combine(Path.GetTempPath(),
@@ -447,8 +489,11 @@ namespace Flow.Launcher.Plugin.PluginsManager
                                 if (cts.IsCancellationRequested)
                                     return;
                                 else
-                                    await Context.API.UpdatePluginAsync(plugin.PluginExistingMetadata, plugin.PluginNewUserPlugin,
-                                        downloadToFilePath);
+                                    if (!await Context.API.UpdatePluginAsync(plugin.PluginExistingMetadata, plugin.PluginNewUserPlugin,
+                                        downloadToFilePath))
+                                       return;
+
+                                anyPluginSuccess = true;
                             }
                             catch (Exception ex)
                             {
@@ -461,6 +506,8 @@ namespace Flow.Launcher.Plugin.PluginsManager
                             }
                         }));
 
+                        if (!anyPluginSuccess) return false;
+
                         if (Settings.AutoRestartAfterChanging)
                         {
                             Context.API.ShowMsg(Context.API.GetTranslation("plugin_pluginsmanager_update_title"),
@@ -556,6 +603,20 @@ namespace Flow.Launcher.Plugin.PluginsManager
         {
             var plugin = Utilities.GetPluginInfoFromZip(localPath);
 
+            if (plugin == null)
+            {
+                return new List<Result>
+                {
+                    new()
+                    {
+                        Title = Context.API.GetTranslation("plugin_pluginsmanager_invalid_zip_title"),
+                        SubTitle = string.Format(Context.API.GetTranslation("plugin_pluginsmanager_invalid_zip_subtitle"),
+                            localPath),
+                        IcoPath = icoPath
+                    }
+                };
+            }
+
             plugin.LocalInstallPath = localPath;
 
             return new List<Result>
@@ -597,14 +658,17 @@ namespace Flow.Launcher.Plugin.PluginsManager
                 return false;
 
             var author = pieces[3];
+            var acceptedHost = "github.com";
             var acceptedSource = "https://github.com";
             var constructedUrlPart = string.Format("{0}/{1}/", acceptedSource, author);
 
-            return url.StartsWith(acceptedSource) &&
-                Context.API.GetAllPlugins().Any(x => 
-                    !string.IsNullOrEmpty(x.Metadata.Website) &&
-                    x.Metadata.Website.StartsWith(constructedUrlPart)
-                );
+            if (!Uri.TryCreate(url, UriKind.Absolute, out var uri) || uri.Host != acceptedHost)
+                return false;
+
+            return Context.API.GetAllPlugins().Any(x =>
+                !string.IsNullOrEmpty(x.Metadata.Website) &&
+                x.Metadata.Website.StartsWith(constructedUrlPart)
+            );
         }
 
         internal async ValueTask<List<Result>> RequestInstallOrUpdateAsync(string search, CancellationToken token,
@@ -644,7 +708,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
             return Search(results, search);
         }
 
-        private void Install(UserPlugin plugin, string downloadedFilePath)
+        private bool Install(UserPlugin plugin, string downloadedFilePath)
         {
             if (!File.Exists(downloadedFilePath))
                 throw new FileNotFoundException($"Plugin {plugin.ID} zip file not found at {downloadedFilePath}",
@@ -652,10 +716,13 @@ namespace Flow.Launcher.Plugin.PluginsManager
 
             try
             {
-                Context.API.InstallPlugin(plugin, downloadedFilePath);
+                if (!Context.API.InstallPlugin(plugin, downloadedFilePath))
+                    return false;
 
                 if (!plugin.IsFromLocalInstallPath)
                     File.Delete(downloadedFilePath);
+
+                return true;
             }
             catch (FileNotFoundException e)
             {
@@ -677,6 +744,8 @@ namespace Flow.Launcher.Plugin.PluginsManager
                         plugin.Name));
                 Context.API.LogException(ClassName, e.Message, e);
             }
+
+            return false;
         }
 
         internal List<Result> RequestUninstall(string search)
@@ -691,6 +760,14 @@ namespace Flow.Launcher.Plugin.PluginsManager
                         IcoPath = x.Metadata.IcoPath,
                         AsyncAction = async e =>
                         {
+                            if (Context.API.PluginModified(x.Metadata.ID))
+                            {
+                                Context.API.ShowMsgError(
+                                    string.Format(Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_title"), x.Metadata.Name),
+                                    Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error_message"));
+                                return false;
+                            }
+
                             string message;
                             if (Settings.AutoRestartAfterChanging)
                             {
@@ -712,7 +789,10 @@ namespace Flow.Launcher.Plugin.PluginsManager
                                     MessageBoxButton.YesNo) == MessageBoxResult.Yes)
                             {
                                 Context.API.HideMainWindow();
-                                await UninstallAsync(x.Metadata);
+                                if (!await UninstallAsync(x.Metadata))
+                                {
+                                    return false;
+                                }
                                 if (Settings.AutoRestartAfterChanging)
                                 {
                                     Context.API.RestartApp();
@@ -745,7 +825,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
             return Search(results, search);
         }
 
-        private async Task UninstallAsync(PluginMetadata plugin)
+        private async Task<bool> UninstallAsync(PluginMetadata plugin)
         {
             try
             {
@@ -753,13 +833,14 @@ namespace Flow.Launcher.Plugin.PluginsManager
                     Context.API.GetTranslation("plugin_pluginsmanager_keep_plugin_settings_subtitle"),
                     Context.API.GetTranslation("plugin_pluginsmanager_keep_plugin_settings_title"),
                     button: MessageBoxButton.YesNo) == MessageBoxResult.No;
-                await Context.API.UninstallPluginAsync(plugin, removePluginSettings);
+                return await Context.API.UninstallPluginAsync(plugin, removePluginSettings);
             }
             catch (ArgumentException e)
             {
                 Context.API.LogException(ClassName, e.Message, e);
                 Context.API.ShowMsgError(Context.API.GetTranslation("plugin_pluginsmanager_uninstall_error_title"),
-                    Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error"));
+                    string.Format(Context.API.GetTranslation("plugin_pluginsmanager_plugin_modified_error"), plugin.Name));
+                return false;
             }
         }
     }

Plugins/Flow.Launcher.Plugin.PluginsManager/Utilities.cs

@@ -65,9 +65,7 @@ namespace Flow.Launcher.Plugin.PluginsManager
 
             using (ZipArchive archive = System.IO.Compression.ZipFile.OpenRead(filePath))
             {
-                var pluginJsonPath = archive.Entries.FirstOrDefault(x => x.Name == "plugin.json").ToString();
-                ZipArchiveEntry pluginJsonEntry = archive.GetEntry(pluginJsonPath);
-
+                var pluginJsonEntry = archive.Entries.FirstOrDefault(x => x.Name == "plugin.json");
                 if (pluginJsonEntry != null)
                 {
                     using Stream stream = pluginJsonEntry.Open();

Plugins/Flow.Launcher.Plugin.PluginsManager/plugin.json

@@ -4,7 +4,7 @@
     "pm"
   ],
   "Name": "Plugins Manager",
-  "Description": "Management of installing, uninstalling or updating Flow Launcher plugins",
+  "Description": "Install, uninstall or update Flow Launcher plugins via the search window",
   "Author": "Jeremy Wu",
   "Version": "1.0.0",
   "Language": "csharp",