Added Play JSON libraries and examples

app/controllers/ExamplesController.scala

+package controllers
+
+import javax.inject._
+
+import scala.util.Random
+
+import play.api.libs.json.{JsValue, Json}
+import play.api.mvc._
+
+
+@Singleton
+class ExamplesController @Inject()(cc: ControllerComponents) extends AbstractController(cc) {
+
+  /**
+    * A controller action that receives JSON as input.
+    * The bodyParser parses the content for you, and leaves the parsed JSON in req.body
+    *
+    * @return
+    */
+  def receiveJsonPost():Action[JsValue] = Action(bodyParser = parse.json) { req =>
+
+    val json:JsValue = req.body
+
+    /*
+     * If the JSON is { name: "Fred" }
+     * then this gets the value that's in name
+     */
+    val name = (json \ "name").as[String]
+
+    Ok(s"Hello $name")
+  }
+
+  /**
+    * A controller that outputs some JSON
+    * @return
+    */
+  def returnJson():Action[AnyContent] = Action { req =>
+
+    Ok(Json.obj(
+      "Hello" -> Seq("World", "Bob", "Alice"),
+      "Goodbye" -> Json.obj(
+        "Mr" -> "Chips"
+      )
+    ))
+  }
+
+  /**
+    * A controller that takes an optional id in the query string.
+    * If we get an ID, we return it. If not, we're just allocating a random ID and then
+    * redirecting so we have an ID.
+    * @param id
+    * @return
+    */
+  def game(id:Option[String]) = Action { req =>
+
+    def randomId = Random.alphanumeric.take(8).toString
+
+    id match {
+      case Some(s) => Ok(s"It was $s")
+      case None => Redirect("/examples/call", Map("id" -> Seq(randomId)))
+    }
+
+  }
+
+}

build.sbt

@@ -12,6 +12,9 @@ resolvers += "Hopper releases" at "http://hopper.une.edu.au/artifactory/libs-rel
 resolvers += "Hopper snapshots" at "http://hopper.une.edu.au/artifactory/libs-snapshot"
 
 libraryDependencies += guice
+
+libraryDependencies += "com.typesafe.play" %% "play-json" % "2.6.10"
+
 libraryDependencies += "org.scalatestplus.play" %% "scalatestplus-play" % "3.1.2" % Test
 
 // Adds additional packages into Twirl

conf/routes

@@ -6,5 +6,10 @@
 # An example controller showing a sample home page
 GET     /                           controllers.HomeController.index
 
+GET     /example/json               controllers.ExamplesController.returnJson()
+POST    /example/json               controllers.ExamplesController.receiveJsonPost()
+
+GET     /example/game               controllers.ExamplesController.game(id:Option[String])
+
 # Map static resources from the /public folder to the /assets URL path
 GET     /assets/*file               controllers.Assets.versioned(path="/public", file: Asset)