/// <summary>
/// 寻找合适的书籍输出器。
/// </summary>
/// <param name="bookToken">书籍节点。</param>
/// <returns>支持指定书籍节点的书籍输出器。</returns>
/// <exception cref="NotSupportedException">未找到支持节点的小说下载插件。</exception>
/// <exception cref="NotSupportedException">不支持的插件类型。</exception>
protected internal IBookWriter FindBookWriterForBookToken(NDTBook bookToken)
{
NovelDownLoadPluginBookTokenAttribute attribute = bookToken.GetType().GetCustomAttribute <NovelDownLoadPluginBookTokenAttribute>(true);
if (attribute == null)
{
throw new NotSupportedException("未找到支持节点的小说下载插件。");
}
// 获取已注册的插件实例。
if (this.Plugins.TryGetValue(attribute.PluginGuid, out IPlugin plugin) && plugin is INovelDownloadPlugin ndPlugin)
{
if (!this.BookWriters.TryGetValue(ndPlugin.Guid, out IBookWriter bookWriter)) // 尝试从已注册的书籍输出器中寻找。
{
// 指定插件未注册书籍输出器，采用默认书籍输出器。
if (ndPlugin is ILightNovelDownloadPlugin)
{
bookWriter = new LightNovelBookWriter();
}
else
{
bookWriter = new NormalBookWriter();
}
}
// 组装组件。
var catalog = new TypeCatalog(typeof(NovelDownloadPluginBase), typeof(BookWriterBase), typeof(PluginManager));
var container = new CompositionContainer(catalog);
container.ComposeParts(plugin, bookWriter, this);
return(bookWriter);
}
else
{
throw new NotSupportedException("不支持的插件类型。");
}
}
