ContainerViewController

swift/WorkflowUI/Sources/Container/ContainerViewController+AnyWorkflow.swift

@@ -0,0 +1,39 @@
+import Foundation
+import Workflow
+
+extension ContainerViewController {
+    public convenience init<W: AnyWorkflowConvertible>(
+        workflow: W,
+        rootViewEnvironment: ViewEnvironment = .empty
+    ) where W.Rendering == ScreenType, W.Output == Output {
+        self.init(workflow: WrapperWorkflow(workflow), rootViewEnvironment: rootViewEnvironment)
+    }
+}
+
+fileprivate struct WrapperWorkflow<Rendering, Output>: Workflow {
+
+    var wrapped: AnyWorkflow<Rendering, Output>
+
+    init<W: AnyWorkflowConvertible>(_ wrapped: W) where W.Output == Output, W.Rendering == Rendering {
+        self.wrapped = wrapped.asAnyWorkflow()
+    }
+
+    typealias State = Void
+
+    func makeInitialState() -> State {
+        return ()
+    }
+
+    func workflowDidChange(from previousWorkflow: WrapperWorkflow, state: inout State) {
+    }
+
+    typealias Output = Output
+
+    typealias Rendering = Rendering
+
+    func render(state: State, context: RenderContext<WrapperWorkflow>) -> Rendering {
+        return wrapped
+            .mapOutput { AnyWorkflowAction(sendingOutput: $0) }
+            .rendered(with: context)
+    }
+}