Add redirect in noMatch handler (#170)

Co-authored-by: hfhbd <[email protected]>

Author: hfhbd

integrationTest/src/jsMain/kotlin/demo.kt

@@ -97,10 +97,7 @@ fun RouteBuilder.Routing() {
     }
     redirect("redirect", target = "users", hide = true)
     if (enableAnswer) {
-        route("answer") {
-            Br()
-            Text("The Answer to the Ultimate Question of Life, the Universe, and Everything is 42.")
-        }
+        answer()
     }
     noMatch {
         P {
@@ -145,6 +142,20 @@ fun RouteBuilder.Routing() {
     }
 }
 
+@Routing
+@Composable
+fun RouteBuilder.answer() {
+    route("answer") {
+        int {
+            Br()
+            Text("The Answer to the Ultimate Question of Life, the Universe, and Everything is $it.")
+        }
+        noMatch {
+            redirect("42")
+        }
+    }
+}
+
 @Composable
 fun RedirectButton() {
     Text("You could also hide navigations and redirect path to other routes.")

src/commonMain/kotlin/app/softwork/routingcompose/RouteBuilder.kt

@@ -150,7 +150,17 @@ public class RouteBuilder internal constructor(private val basePath: String, pri
         }
     }
 
-    public class NoMatch(public val remainingPath: String, public val parameters: Parameters?)
+    @Routing
+    public class NoMatch(public val remainingPath: String, public val parameters: Parameters?) {
+        @Routing
+        @Composable
+        public fun redirect(target: String, hide: Boolean = false) {
+            val router = Router.current
+            LaunchedEffect(Unit) {
+                router.navigate(target, hide)
+            }
+        }
+    }
 }
 
 private class DelegatingRouter(val basePath: String, val router: Router) : Router by router {
@@ -159,13 +169,16 @@ private class DelegatingRouter(val basePath: String, val router: Router) : Route
             to.startsWith("/") -> {
                 router.navigate(to, hide)
             }
+
             basePath == "/" -> {
                 router.navigate("/$to", hide)
             }
+
             to.startsWith(".") -> {
                 val newPath = router.currentPath.relative(to)
                 router.navigate(newPath.path)
             }
+
             else -> {
                 router.navigate("$basePath/$to", hide)
             }

src/jsTest/kotlin/app/softwork/routingcompose/RedirectTest.kt

@@ -33,4 +33,28 @@ class RedirectTest {
         waitForChanges()
         assertEquals("foo", root.innerHTML, "Second")
     }
+
+    @Test
+    fun redirectingNoMatchTest() = runTest {
+        val router = MockRouter()
+        composition {
+            router("/bar") {
+                route("foo") {
+                    Text("foo")
+                }
+                route("bar") {
+                    Text("bar")
+                }
+                noMatch {
+                    redirect("foo", hide = true)
+                }
+            }
+        }
+        assertEquals("bar", root.innerHTML)
+
+        router.navigate("/asdf")
+        waitForChanges()
+        waitForChanges()
+        assertEquals("foo", root.innerHTML)
+    }
 }