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Moves all plugin logic to new PluginLoader static class

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This commit is contained in:
Neil Dorin
2020-03-25 15:04:44 -06:00
parent e6fb9cd1eb
commit 733dbf9bd7
5 changed files with 295 additions and 422 deletions
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153
PepperDashEssentials/ControlSystem.cs
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@@ -25,7 +25,6 @@ namespace PepperDash.Essentials
{
HttpLogoServer LogoServer;
List<string> LoadedAssemblies = new List<string>();
public ControlSystem()
: base()
@@ -48,6 +47,8 @@ namespace PepperDash.Essentials
ConsoleAccessLevelEnum.AccessOperator);
}
CrestronConsole.AddNewConsoleCommand(PluginLoader.ReportAssemblyVersions, "reportversions", "Reports the versions of the loaded assemblies", ConsoleAccessLevelEnum.AccessOperator);
// CrestronConsole.AddNewConsoleCommand(S => { ConfigWriter.WriteConfigFile(null); }, "writeconfig", "writes the current config to a file", ConsoleAccessLevelEnum.AccessOperator);
CrestronConsole.AddNewConsoleCommand(s =>
{
@@ -80,6 +81,8 @@ namespace PepperDash.Essentials
GoWithLoad();
}
/// <summary>
/// Determines if the program is running on a processor (appliance) or server (VC-4).
///
@@ -160,20 +163,13 @@ namespace PepperDash.Essentials
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Starting Essentials load from configuration");
// Get the loaded assembly filenames
var appDi = new DirectoryInfo(Global.ApplicationDirectoryPathPrefix);
var assemblyFiles = appDi.GetFiles("*.dll");
foreach (var file in assemblyFiles)
{
LoadedAssemblies.Add(file.Name);
}
PluginLoader.AddProgramAssemblies();
var filesReady = SetupFilesystem();
if (filesReady)
{
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Checking for plugins");
LoadPlugins();
PluginLoader.LoadPlugins();
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Folder structure verified. Loading config...");
if (!ConfigReader.LoadConfig2())
@@ -208,142 +204,7 @@ namespace PepperDash.Essentials
}
/// <summary>
/// Loads plugins
/// </summary>
void LoadPlugins()
{
var dir = Global.FilePathPrefix + "plugins";
if (Directory.Exists(dir))
{
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Plugins directory found, checking for factory plugins");
var di = new DirectoryInfo(dir);
var zFiles = di.GetFiles("*.cplz");
foreach (var fi in zFiles)
{
Debug.Console(0, "Found cplz: {0}. Unzipping into plugins directory", fi.Name);
var result = CrestronZIP.Unzip(fi.FullName, di.FullName);
Debug.Console(0, "UnZip Result: {0}", result.ToString());
fi.Delete();
}
var files = di.GetFiles("*.dll");
Dictionary<string, Assembly> assyList = new Dictionary<string, Assembly>();
foreach (FileInfo fi in files)
{
if (!CheckIfAssemblyExists(fi.Name))
{
try
{
string assyVersion = string.Empty;
var assy = Assembly.LoadFrom(fi.FullName);
var ver = assy.GetCustomAttributes(typeof(AssemblyInformationalVersionAttribute), false);
if (ver != null)
{
AssemblyInformationalVersionAttribute verAttribute = ver[0] as AssemblyInformationalVersionAttribute;
assyVersion = verAttribute.InformationalVersion;
}
else
assyList.Add(fi.FullName, assy);
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Loaded plugin file '{0}', version {1}", fi.FullName, assyVersion);
}
catch
{
Debug.Console(2, "Assembly {0} is not a custom assembly", fi.FullName);
continue; //catching any load issues and continuing. There will be exceptions loading Crestron .dlls from the cplz Probably should do something different here
}
}
else
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Skipping plugin: {0}. There is already an assembly with that name loaded.", fi.Name);
}
foreach (var assy in assyList)
{
// iteratate this assembly's classes, looking for "LoadPlugin()" methods
try
{
var types = assy.Value.GetTypes();
foreach (var type in types)
{
try
{
var methods = type.GetMethods(BindingFlags.Public | BindingFlags.Static);
var loadPlugin = methods.FirstOrDefault(m => m.Name.Equals("LoadPlugin"));
if (loadPlugin != null)
{
Debug.Console(2, "LoadPlugin method found in {0}", type.Name);
var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static);
var minimumVersion = fields.FirstOrDefault(p => p.Name.Equals("MinimumEssentialsFrameworkVersion"));
if (minimumVersion != null)
{
Debug.Console(2, "MinimumEssentialsFrameworkVersion found");
var minimumVersionString = minimumVersion.GetValue(null) as string;
if (!string.IsNullOrEmpty(minimumVersionString))
{
var passed = Global.IsRunningMinimumVersionOrHigher(minimumVersionString);
if (!passed)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Plugin indicates minimum Essentials version {0}. Dependency check failed. Skipping Plugin", minimumVersionString);
continue;
}
else
{
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Passed plugin passed dependency check (required version {0})", minimumVersionString);
}
}
else
{
Debug.Console(0, Debug.ErrorLogLevel.Warning, "MinimumEssentialsFrameworkVersion found but not set. Loading plugin, but your mileage may vary.");
}
}
else
{
Debug.Console(0, Debug.ErrorLogLevel.Warning, "MinimumEssentialsFrameworkVersion not found. Loading plugin, but your mileage may vary.");
}
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Adding plugin: {0}", assy.Key);
loadPlugin.Invoke(null, null);
}
}
catch
{
Debug.Console(2, "Load Plugin not found. {0} is not a plugin assembly", assy.Value.FullName);
continue;
}
}
}
catch
{
Debug.Console(2, "Assembly {0} is not a custom assembly. Types cannot be loaded.", assy.Value.FullName);
continue;
}
}
// plugin dll will be loaded. Any classes in plugin should have a static constructor
// that registers that class with the Core.DeviceFactory
}
}
/// <summary>
/// Checks if the filename matches an already loaded assembly file's name
/// </summary>
/// <param name="filename"></param>
/// <returns>True if file already matches loaded assembly file.</returns>
bool CheckIfAssemblyExists(string filename)
{
var loadedAssembly = LoadedAssemblies.FirstOrDefault(s => s.Equals(filename));
if (loadedAssembly != null)
return true;
else
return false;
}
/// <summary>
/// Verifies filesystem is set up. IR, SGD, and programX folders