From fb203e85b849817943f85d9c7368695fb8c78583 Mon Sep 17 00:00:00 2001
From: Li Haoyi <haoyi.sg@gmail.com>
Date: Wed, 9 Oct 2019 10:27:37 +0800
Subject: Allow `cask.decorators.compress` to skip results it doesn't care
 about

---
 cask/src/cask/decorators/compress.scala    | 2 +-
 cask/src/cask/endpoints/JsonEndpoint.scala | 1 -
 cask/src/cask/router/Result.scala          | 6 ++++++
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/cask/src/cask/decorators/compress.scala b/cask/src/cask/decorators/compress.scala
index 3738bd0..61d76f6 100644
--- a/cask/src/cask/decorators/compress.scala
+++ b/cask/src/cask/decorators/compress.scala
@@ -11,7 +11,7 @@ class compress extends cask.RawDecorator{
       .toSeq
       .flatMap(_.asScala)
       .flatMap(_.split(", "))
-    delegate(Map()).map{ v =>
+    delegate(Map()).transform{ case v: cask.Response[_]  =>
       val (newData, newHeaders) = if (acceptEncodings.exists(_.toLowerCase == "gzip")) {
         new Response.Data {
           def write(out: OutputStream): Unit = {
diff --git a/cask/src/cask/endpoints/JsonEndpoint.scala b/cask/src/cask/endpoints/JsonEndpoint.scala
index 842eae6..31109d9 100644
--- a/cask/src/cask/endpoints/JsonEndpoint.scala
+++ b/cask/src/cask/endpoints/JsonEndpoint.scala
@@ -85,7 +85,6 @@ class getJson(val path: String, override val subpath: Boolean = false)
   type InputParser[T] = QueryParamReader[T]
   override type OuterReturned = Result[Response.Raw]
   def wrapFunction(ctx: Request, delegate: Delegate): Result[Response.Raw] = {
-
     delegate(WebEndpoint.buildMapFromQueryParams(ctx))
   }
   def wrapPathSegment(s: String) = Seq(s)
diff --git a/cask/src/cask/router/Result.scala b/cask/src/cask/router/Result.scala
index 52ef0f8..e38ee28 100644
--- a/cask/src/cask/router/Result.scala
+++ b/cask/src/cask/router/Result.scala
@@ -9,6 +9,7 @@ package cask.router
  */
 sealed trait Result[+T]{
   def map[V](f: T => V): Result[V]
+  def transform[V](f: PartialFunction[T, V]): Result[V]
 }
 object Result{
 
@@ -18,6 +19,10 @@ object Result{
    */
   case class Success[T](value: T) extends Result[T]{
     def map[V](f: T => V) = Success(f(value))
+    def transform[V](f: PartialFunction[T, V]) = f.lift(value) match {
+      case None => Success(value).asInstanceOf[Result[V]]
+      case Some(res) => Success(res)
+    }
   }
 
   /**
@@ -25,6 +30,7 @@ object Result{
    */
   sealed trait Error extends Result[Nothing]{
     def map[V](f: Nothing => V) = this
+    def transform[V](f: PartialFunction[Nothing, V]) = this
   }
 
 
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