private static List <T> GetAllPluginInstances <T>() where T : class, IPluginBase
{
_logger.Trace("PluginsManager.GetAllPluginInstances()");
List <T> list = new List <T>();
// Get the global settings
var settings = ProgramSettings.GetGlobalSettings();
foreach (var pluginAssembly in settings.Assemblies.Where(p => p.IsValid))
{
foreach (var pluginType in pluginAssembly.Plugins.Where(t => t.Enabled))
{
// If the type instance was already loaded, returns the instance
if (pluginType.IsLoaded)
{
T instance = pluginType.PluginInstance as T;
if (instance != null)
{
list.Add(instance);
}
}
else
{
if (!pluginAssembly.IsLoaded)
{
string pluginsDirectory = settings.DirectoriesSettings.PluginsDirectory;
string pluginLocation = Path.Combine(pluginsDirectory, pluginAssembly.File);
pluginAssembly.AssemblyInstance = Assembly.LoadFile(pluginLocation);
pluginAssembly.IsLoaded = true;
}
Type type = pluginAssembly.AssemblyInstance.GetType(pluginType.Class);
var instance = Activator.CreateInstance(type) as T;
if (instance != null)
{
list.Add(instance);
pluginType.PluginInstance = instance;
pluginType.IsLoaded = true;
}
}
}
}
return(list);
}
/// <summary>
/// Gets the plugin instance from the global settins.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="assemblyGuid">The assembly file name.</param>
/// <param name="pluginComponent">Type of the plugin.</param>
/// <returns>Instance object of the plugin</returns>
private static T GetPluginInstance <T>(string assemblyGuid, string pluginComponent) where T : class, IPluginBase
{
_logger.Trace("PluginsManager.GetPluginInstance()");
// Get the global settings
var settings = ProgramSettings.GetGlobalSettings();
// Find the Assembly in the global settings
var globalAssembly = settings.Assemblies.First(a => a.Guid.SequenceEqual(assemblyGuid));
// Find the type in the assembly
var globalAssemblyComponent = globalAssembly.Plugins.First(t => t.Class.Equals(pluginComponent, StringComparison.InvariantCultureIgnoreCase));
// If the type instance was already loaded, returns the instance
if (globalAssemblyComponent.IsLoaded)
{
return((T)globalAssemblyComponent.PluginInstance);
}
// If the assembly is not loaded we need to create an instance
if (!globalAssembly.IsLoaded)
{
string pluginsDirectory = settings.DirectoriesSettings.PluginsDirectory;
string pluginLocation = Path.Combine(pluginsDirectory, globalAssembly.File);
if (File.Exists(pluginLocation))
{
globalAssembly.AssemblyInstance = Assembly.LoadFile(pluginLocation);
globalAssembly.IsLoaded = true;
}
else
{
return(null);
}
}
Type type = globalAssembly.AssemblyInstance.GetType(pluginComponent);
var instance = Activator.CreateInstance(type);
// Create the new instance of the plugin and save it in the global settings (for later use)
globalAssemblyComponent.PluginInstance = (T)instance;
globalAssemblyComponent.IsLoaded = true;
// returns the instance of the plugin
return((T)globalAssemblyComponent.PluginInstance);
}
/// <summary>
/// Imports the plugin.
/// </summary>
/// <param name="pluginLocation">The plugin location.</param>
/// <param name="overwrite">if set to <c>true</c> [overwrite].</param>
public static void ImportPlugin(string pluginLocation, bool overwrite = false)
{
_logger.Trace("PluginsManager.ImportPlugin('{0}')", pluginLocation);
// Get current global settings
var settings = ProgramSettings.GetGlobalSettings();
string extension = Path.GetExtension(pluginLocation) ?? string.Empty;
if (extension.EndsWith(".zip", StringComparison.InvariantCultureIgnoreCase))
{
string shortUniqueName = StringHelper.CreateUniqueName(Path.GetFileNameWithoutExtension(pluginLocation));
string tempDirectory = settings.DirectoriesSettings.TempDirectory;
string pluginTempDirectory = Path.Combine(tempDirectory, shortUniqueName);
Uri pluginTempDirectoryUri = new Uri(tempDirectory, UriKind.Absolute);
if (!Directory.Exists(pluginTempDirectory))
{
Directory.CreateDirectory(pluginTempDirectory);
}
ZipFile.ExtractToDirectory(pluginLocation, pluginTempDirectory);
foreach (string extractedPluginLocation in Directory.GetFiles(pluginTempDirectory, "*.dll", SearchOption.AllDirectories))
{
Uri pluginLocationUri = new Uri(extractedPluginLocation, UriKind.Absolute);
byte[] assemblyBytes = File.ReadAllBytes(extractedPluginLocation);
Assembly assembly = Assembly.Load(assemblyBytes);
string relativePluginLocation = pluginTempDirectoryUri.MakeRelativeUri(pluginLocationUri).ToString();
// Check each assembly for plugins
if (CheckAssembly(relativePluginLocation, assembly, settings, false))
{
string pluginTargetDirectory = Path.Combine(settings.DirectoriesSettings.PluginsDirectory, shortUniqueName);
if (!Directory.Exists(pluginTargetDirectory))
{
Directory.Move(pluginTempDirectory, pluginTargetDirectory);
}
}
}
}
else if (extension.EndsWith(".dll", StringComparison.InvariantCultureIgnoreCase))
{
byte[] assemblyBytes = File.ReadAllBytes(pluginLocation);
Assembly assembly = Assembly.Load(assemblyBytes);
// Check each assembly for plugins
if (CheckAssembly(null, assembly, settings, false))
{
string pluginTargetLocation = Path.Combine(settings.DirectoriesSettings.PluginsDirectory, Path.GetFileName(pluginLocation));
File.Copy(pluginLocation, pluginTargetLocation, overwrite);
}
}
}
/// <summary>
/// Checks the existing plugins in the global settings.
/// </summary>
public static void CheckExistingPlugins()
{
_logger.Trace("PluginsManager.CheckExistingPlugins()");
// Get current global settings
var settings = ProgramSettings.GetGlobalSettings();
// Get DefaultPluginsLocation
string pluginsDirectory = settings.DirectoriesSettings.PluginsDirectory;
foreach (var pluginAssembly in settings.Assemblies)
{
try
{
// Load the assembly from the plugin folder
string pluginLocation = Path.Combine(pluginsDirectory, pluginAssembly.File);
byte[] assemblyBytes = File.ReadAllBytes(pluginLocation);
Assembly assembly = Assembly.Load(assemblyBytes);
bool isValidPlugin = false;
foreach (Configuration.GlobalPlugin pluginComponent in pluginAssembly.Plugins)
{
try
{
Type type = assembly.GetType(pluginComponent.Class);
// Try to create an instance of the type and check
// if inherit from IPluginBase interface
object runnable = Activator.CreateInstance(type);
if (runnable is IPluginBase)
{
isValidPlugin = true;
if (type != null)
{
pluginAssembly.Version = type.Assembly.GetName().Version.ToString();
}
}
}
catch (Exception ex)
{
_logger.Error(ex, ex.Message);
isValidPlugin = false;
}
pluginComponent.IsValid = isValidPlugin;
pluginComponent.Enabled = isValidPlugin && pluginComponent.Enabled;
} // -- fin foreach (PluginType pluginType in pluginAssembly.Types)
}
catch (Exception ex)
{
_logger.Error(ex, ex.Message);
pluginAssembly.IsValid = false;
pluginAssembly.Plugins.ForEach(t =>
{
t.Enabled = false;
t.IsValid = false;
});
}
}
}
