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Diffstat (limited to 'MediaBrowser.Common/Plugins/BasePluginOfT.cs')
| -rw-r--r-- | MediaBrowser.Common/Plugins/BasePluginOfT.cs | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/MediaBrowser.Common/Plugins/BasePluginOfT.cs b/MediaBrowser.Common/Plugins/BasePluginOfT.cs new file mode 100644 index 000000000..d5c780851 --- /dev/null +++ b/MediaBrowser.Common/Plugins/BasePluginOfT.cs @@ -0,0 +1,208 @@ +#pragma warning disable SA1649 // File name should match first type name +using System; +using System.IO; +using System.Runtime.InteropServices; +using MediaBrowser.Common.Configuration; +using MediaBrowser.Model.Plugins; +using MediaBrowser.Model.Serialization; + +namespace MediaBrowser.Common.Plugins +{ + /// <summary> + /// Provides a common base class for all plugins. + /// </summary> + /// <typeparam name="TConfigurationType">The type of the T configuration type.</typeparam> + public abstract class BasePlugin<TConfigurationType> : BasePlugin, IHasPluginConfiguration + where TConfigurationType : BasePluginConfiguration + { + /// <summary> + /// The configuration sync lock. + /// </summary> + private readonly object _configurationSyncLock = new object(); + + /// <summary> + /// The configuration save lock. + /// </summary> + private readonly object _configurationSaveLock = new object(); + + /// <summary> + /// The configuration. + /// </summary> + private TConfigurationType _configuration; + + /// <summary> + /// Initializes a new instance of the <see cref="BasePlugin{TConfigurationType}" /> class. + /// </summary> + /// <param name="applicationPaths">The application paths.</param> + /// <param name="xmlSerializer">The XML serializer.</param> + protected BasePlugin(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer) + { + ApplicationPaths = applicationPaths; + XmlSerializer = xmlSerializer; + if (this is IPluginAssembly assemblyPlugin) + { + var assembly = GetType().Assembly; + var assemblyName = assembly.GetName(); + var assemblyFilePath = assembly.Location; + + var dataFolderPath = Path.Combine(ApplicationPaths.PluginsPath, Path.GetFileNameWithoutExtension(assemblyFilePath)); + if (!Directory.Exists(dataFolderPath) && Version != null) + { + // Try again with the version number appended to the folder name. + dataFolderPath = dataFolderPath + "_" + Version.ToString(); + } + + assemblyPlugin.SetAttributes(assemblyFilePath, dataFolderPath, assemblyName.Version); + + var idAttributes = assembly.GetCustomAttributes(typeof(GuidAttribute), true); + if (idAttributes.Length > 0) + { + var attribute = (GuidAttribute)idAttributes[0]; + var assemblyId = new Guid(attribute.Value); + + assemblyPlugin.SetId(assemblyId); + } + } + } + + /// <summary> + /// Gets the application paths. + /// </summary> + /// <value>The application paths.</value> + protected IApplicationPaths ApplicationPaths { get; private set; } + + /// <summary> + /// Gets the XML serializer. + /// </summary> + /// <value>The XML serializer.</value> + protected IXmlSerializer XmlSerializer { get; private set; } + + /// <summary> + /// Gets the type of configuration this plugin uses. + /// </summary> + /// <value>The type of the configuration.</value> + public Type ConfigurationType => typeof(TConfigurationType); + + /// <summary> + /// Gets or sets the event handler that is triggered when this configuration changes. + /// </summary> + public EventHandler<BasePluginConfiguration> ConfigurationChanged { get; set; } + + /// <summary> + /// Gets the name the assembly file. + /// </summary> + /// <value>The name of the assembly file.</value> + protected string AssemblyFileName => Path.GetFileName(AssemblyFilePath); + + /// <summary> + /// Gets or sets the plugin configuration. + /// </summary> + /// <value>The configuration.</value> + public TConfigurationType Configuration + { + get + { + // Lazy load + if (_configuration == null) + { + lock (_configurationSyncLock) + { + if (_configuration == null) + { + _configuration = LoadConfiguration(); + } + } + } + + return _configuration; + } + + protected set => _configuration = value; + } + + /// <summary> + /// Gets the name of the configuration file. Subclasses should override. + /// </summary> + /// <value>The name of the configuration file.</value> + public virtual string ConfigurationFileName => Path.ChangeExtension(AssemblyFileName, ".xml"); + + /// <summary> + /// Gets the full path to the configuration file. + /// </summary> + /// <value>The configuration file path.</value> + public string ConfigurationFilePath => Path.Combine(ApplicationPaths.PluginConfigurationsPath, ConfigurationFileName); + + /// <summary> + /// Gets the plugin configuration. + /// </summary> + /// <value>The configuration.</value> + BasePluginConfiguration IHasPluginConfiguration.Configuration => Configuration; + + /// <summary> + /// Saves the current configuration to the file system. + /// </summary> + /// <param name="config">Configuration to save.</param> + public virtual void SaveConfiguration(TConfigurationType config) + { + lock (_configurationSaveLock) + { + var folder = Path.GetDirectoryName(ConfigurationFilePath); + if (!Directory.Exists(folder)) + { + Directory.CreateDirectory(folder); + } + + XmlSerializer.SerializeToFile(config, ConfigurationFilePath); + } + } + + /// <summary> + /// Saves the current configuration to the file system. + /// </summary> + public virtual void SaveConfiguration() + { + SaveConfiguration(Configuration); + } + + /// <inheritdoc /> + public virtual void UpdateConfiguration(BasePluginConfiguration configuration) + { + if (configuration == null) + { + throw new ArgumentNullException(nameof(configuration)); + } + + Configuration = (TConfigurationType)configuration; + + SaveConfiguration(Configuration); + + ConfigurationChanged?.Invoke(this, configuration); + } + + /// <inheritdoc /> + public override PluginInfo GetPluginInfo() + { + var info = base.GetPluginInfo(); + + info.ConfigurationFileName = ConfigurationFileName; + + return info; + } + + private TConfigurationType LoadConfiguration() + { + var path = ConfigurationFilePath; + + try + { + return (TConfigurationType)XmlSerializer.DeserializeFromFile(typeof(TConfigurationType), path); + } + catch + { + var config = (TConfigurationType)Activator.CreateInstance(typeof(TConfigurationType)); + SaveConfiguration(config); + return config; + } + } + } +} |