From 7ab87deaa91bd19527da2c72937b1e2d1a97ef12 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jakob@odersky.com>
Date: Tue, 11 Oct 2016 01:08:14 -0700
Subject: Initial commit

---
 src/main/scala/gh/SnakifiedSprayJsonSupport.scala | 52 +++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/main/scala/gh/SnakifiedSprayJsonSupport.scala

(limited to 'src/main/scala/gh/SnakifiedSprayJsonSupport.scala')

diff --git a/src/main/scala/gh/SnakifiedSprayJsonSupport.scala b/src/main/scala/gh/SnakifiedSprayJsonSupport.scala
new file mode 100644
index 0000000..529b098
--- /dev/null
+++ b/src/main/scala/gh/SnakifiedSprayJsonSupport.scala
@@ -0,0 +1,52 @@
+/**
+  * The MIT License (MIT)
+  *
+  * Copyright (c) 2013-2015 Andrew Snare, Age Mooij
+  *
+  * Permission is hereby granted, free of charge, to any person obtaining a copy
+  * of this software and associated documentation files (the "Software"), to deal
+  * in the Software without restriction, including without limitation the rights
+  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  * copies of the Software, and to permit persons to whom the Software is
+  * furnished to do so, subject to the following conditions:
+  *
+  * The above copyright notice and this permission notice shall be included in all
+  * copies or substantial portions of the Software.
+  *
+  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  * SOFTWARE.
+  */
+package gh
+import spray.json._
+
+/**
+  * A custom version of the Spray DefaultJsonProtocol with a modified field naming strategy
+  */
+trait SnakifiedSprayJsonSupport extends DefaultJsonProtocol {
+  import reflect._
+
+  /**
+    * This is the most important piece of code in this object!
+    * It overrides the default naming scheme used by spray-json and replaces it with a scheme that turns camelcased
+    * names into snakified names (i.e. using underscores as word separators).
+    */
+  override protected def extractFieldNames(classTag: ClassTag[_]) = {
+    import java.util.Locale
+
+    def snakify(name: String) = {
+      val pass1 = """([A-Z]+)([A-Z][a-z])""".r.replaceAllIn(name, "$1_$2")
+      val pass2 = """([a-z\d])([A-Z])""".r.replaceAllIn(pass1, "$1_$2")
+
+      pass2.toLowerCase(Locale.US)
+    }
+
+    super.extractFieldNames(classTag).map{ snakify(_) }
+  }
+}
+
+object SnakifiedSprayJsonSupport extends SnakifiedSprayJsonSupport
-- 
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