From 53d04d4255489bd5802dc91d9dbebddd206d630b Mon Sep 17 00:00:00 2001
From: Stewart Stewart <stewinsalot@gmail.com>
Date: Sat, 17 Dec 2016 02:11:18 -0500
Subject: add json format for date (ISO)

---
 src/main/scala/xyz/driver/core/date.scala |  7 ++++++-
 src/main/scala/xyz/driver/core/json.scala | 17 +++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

(limited to 'src/main/scala/xyz')

diff --git a/src/main/scala/xyz/driver/core/date.scala b/src/main/scala/xyz/driver/core/date.scala
index b423585..0cf8986 100644
--- a/src/main/scala/xyz/driver/core/date.scala
+++ b/src/main/scala/xyz/driver/core/date.scala
@@ -23,7 +23,7 @@ object date {
 
   final case class Date(year: Int, month: Month, day: Int) {
     def iso8601: String = f"$year%04d-${month + 1}%02d-$day%02d"
-    def toJavaSqlDate = new java.sql.Date(toJavaDate.getTime)
+    def toJavaSqlDate   = new java.sql.Date(toJavaDate.getTime)
     def toJavaDate: java.util.Date = {
       val cal = Calendar.getInstance()
       cal.set(Calendar.YEAR, year - 1900)
@@ -34,6 +34,11 @@ object date {
   }
 
   object Date {
+    def parseIso(iso: String): Option[Date] = {
+      util.Try(iso.split("-").map(_.toInt)).toOption collect {
+        case Array(year, month, day) => Date(year, tagMonth(month), day)
+      }
+    }
     def fromJavaDate(date: java.util.Date) = {
       val cal = Calendar.getInstance()
       cal.setTime(date)
diff --git a/src/main/scala/xyz/driver/core/json.scala b/src/main/scala/xyz/driver/core/json.scala
index 277543b..ecd7cce 100644
--- a/src/main/scala/xyz/driver/core/json.scala
+++ b/src/main/scala/xyz/driver/core/json.scala
@@ -7,6 +7,7 @@ import akka.http.scaladsl.unmarshalling.Unmarshaller
 import spray.json.{DeserializationException, JsNumber, _}
 import xyz.driver.core.revision.Revision
 import xyz.driver.core.time.Time
+import xyz.driver.core.date.Date
 
 import scala.reflect.runtime.universe._
 
@@ -66,6 +67,22 @@ object json {
     }
   }
 
+  implicit val dateFormat = new RootJsonFormat[Date] {
+    def write(date: Date) = JsObject("calendarDate" -> JsString(date.iso8601))
+
+    def read(value: JsValue): Date = value match {
+      case JsObject(fields) =>
+        fields
+          .get("calendarDate")
+          .flatMap {
+            case JsString(iso) => Date.parseIso(iso)
+            case _             => None
+          }
+          .getOrElse(throw DeserializationException("Date expects YYYY-MM-DD"))
+      case _ => throw DeserializationException("Date expects YYYY-MM-DD")
+    }
+  }
+
   def RevisionInPath[T]: PathMatcher1[Revision[T]] =
     PathMatcher("""[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}""".r) flatMap { string =>
       Some(Revision[T](string))
-- 
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