add IamReadyToPlayCommand & refactoring

src/main/kotlin/eventDemo/configuration/ConfigureHttp.kt

@@ -0,0 +1,52 @@
+package eventDemo.configuration
+
+import io.ktor.http.HttpHeaders
+import io.ktor.http.HttpMethod
+import io.ktor.http.HttpStatusCode
+import io.ktor.server.application.Application
+import io.ktor.server.application.install
+import io.ktor.server.plugins.autohead.AutoHeadResponse
+import io.ktor.server.plugins.cors.routing.CORS
+import io.ktor.server.plugins.statuspages.StatusPages
+import io.ktor.server.resources.Resources
+import io.ktor.server.response.respondText
+
+fun Application.configureHttpRouting() {
+    install(CORS) {
+        allowMethod(HttpMethod.Options)
+        allowMethod(HttpMethod.Put)
+        allowMethod(HttpMethod.Post)
+        allowMethod(HttpMethod.Delete)
+        allowMethod(HttpMethod.Patch)
+        allowHeader(HttpHeaders.Authorization)
+        allowHeader("MyCustomHeader")
+        anyHost() // @TODO: Don't do this in production if possible. Try to limit it.
+    }
+    install(AutoHeadResponse)
+    install(Resources)
+    install(StatusPages) {
+        exception<BadRequestException> { call, cause ->
+            call.respondText(text = "400: $cause", status = HttpStatusCode.BadRequest)
+        }
+        exception<Throwable> { call, cause ->
+            call.respondText(text = "500: $cause", status = HttpStatusCode.InternalServerError)
+        }
+    }
+}
+
+class BadRequestException(
+    val httpError: HttpErrorBadRequest,
+) : Exception()
+
+class HttpErrorBadRequest(
+    statusCode: HttpStatusCode,
+    val title: String = statusCode.description,
+    val invalidParams: List<InvalidParam>,
+) {
+    val statusCode: Int = statusCode.value
+
+    data class InvalidParam(
+        val name: String,
+        val reason: String,
+    )
+}