Added API for listing of scans

Added API support

app/controllers/api/ApiController.scala

@@ -0,0 +1,30 @@
+package controllers.api
+
+import controllers.AuthenticatedController
+import play.api.mvc.{ActionBuilder, Request, Result}
+import play.twirl.api.Txt
+
+import scala.concurrent.Future
+
+trait ApiController extends AuthenticatedController with ApiResources {
+
+  protected def apiConfig: ApiConfig
+
+  protected def ApiAction(resource: ApiResource) = new ActionBuilder[Request] {
+    override def invokeBlock[A](request: Request[A], block: (Request[A]) => Future[Result]): Future[Result] = {
+      val appNameOption = request.headers.get("x-app-name").orElse(request.getQueryString("app-name"))
+      val appTokenOption = request.headers.get("x-app-token").orElse(request.getQueryString("app-token"))
+      (appNameOption, appTokenOption) match {
+        case (Some(appName), Some(appToken)) =>
+          apiConfig.getApplication(appName, appToken) match {
+            case Some(app) =>
+              if(app.isAllowed(resource)) block(request)
+              else Future.successful(Unauthorized(Txt("The application is not allowed to access "+resource.name)))
+            case None => Future.successful(Unauthorized(Txt("Unknown application or bad token")))
+          }
+        case _ => Future.successful(Unauthorized(Txt("Missing auth headers x-app-name and x-app-token (or similar GET parameters).")))
+      }
+    }
+  }
+
+}