namespace Nancy.Testing

{

using Nancy.ViewEngines;

/// <summary>

/// A view factory decorator, aimed for test,

/// that exposes some interesting properties about the generated view

/// </summary>

public class TestingViewFactory : IViewFactory

{

private readonly DefaultViewFactory decoratedViewFactory;

/// <summary>

/// Creates the view based on the view factory sent to the constructor

/// </summary>

/// <param name="viewFactory">the view factory that is decorated</param>

public TestingViewFactory(DefaultViewFactory viewFactory)

{

this.decoratedViewFactory = viewFactory;

}

/// <summary>

/// Renders the view and then call into the viewfactory

/// that the TestingViewFactory is decorating

/// </summary>

/// <param name="viewName">The name of the view to render.</param>

/// <param name="model">The module path of the module that is rendering the view.</param>

/// <param name="viewLocationContext">A <see cref="ViewLocationContext"/> instance, containing information about the context for which the view is being rendered.</param>

/// <returns>A response.</returns>

public Response RenderView(string viewName, dynamic model, ViewLocationContext viewLocationContext)

{

// Intercept and store interesting stuff

viewLocationContext.Context.Items[TestingViewContextKeys.VIEWMODEL] = model;

viewLocationContext.Context.Items[TestingViewContextKeys.VIEWNAME] = viewName;

viewLocationContext.Context.Items[TestingViewContextKeys.MODULENAME] = viewLocationContext.ModuleName;

viewLocationContext.Context.Items[TestingViewContextKeys.MODULEPATH] = viewLocationContext.ModulePath;

return this.decoratedViewFactory.RenderView(viewName, model, viewLocationContext);

}

}

/// <summary>

/// The key names for where the testing view context data is stored

/// </summary>

public static class TestingViewContextKeys

{

/// <summary>

/// The key in ViewLocationContext.Item for the view model

/// </summary>

public const string VIEWMODEL = "__Nancy_Testing_ViewModel";

/// <summary>

/// The key in ViewLocationContext.Item for the view name

/// </summary>

public const string VIEWNAME = "__Nancy_Testing_ViewName";

/// <summary>

/// The key in ViewLocationContext.Item for the model name

/// </summary>

public const string MODULENAME = "__Nancy_Testing_ModuleName";

/// <summary>

/// The key in ViewLocationContext.Item for the module path

/// </summary>

public const string MODULEPATH = "__Nancy_Testing_ModulePath";

}

}