add Date#toString and Date.fromString

3 files changed, 23 insertions, 2 deletions

diff --git a/src/main/scala/xyz/driver/core/date.scala b/src/main/scala/xyz/driver/core/date.scala
index ab19074..bb88501 100644
--- a/src/main/scala/xyz/driver/core/date.scala
+++ b/src/main/scala/xyz/driver/core/date.scala
@@ -21,5 +21,16 @@ object date {
     val DECEMBER  = tagMonth(Calendar.DECEMBER)
   }
 
-  final case class Date(year: Int, month: Month, day: Int)
+  final case class Date(year: Int, month: Month, day: Int) {
+    override def toString = f"$year%04d-${month + 1}%02d-$day%02d"
+  }
+
+  object Date {
+    def fromString(dateString: String): Option[Date] = {
+      util.Try(dateString.split("-").map(_.toInt)).toOption collect {
+        case Array(year, month, day) if (1 to 12 contains month) && (1 to 31 contains day) =>
+          Date(year, tagMonth(month - 1), day)
+      }
+    }
+  }
 }
diff --git a/src/main/scala/xyz/driver/core/json.scala b/src/main/scala/xyz/driver/core/json.scala
index 5833383..039f650 100644
--- a/src/main/scala/xyz/driver/core/json.scala
+++ b/src/main/scala/xyz/driver/core/json.scala
@@ -77,7 +77,7 @@ object json {
     }
   }
 
-  implicit val dateFormat = jsonFormat3(Date)
+  implicit val dateFormat = jsonFormat3(Date.apply)
 
   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 =>
diff --git a/src/test/scala/xyz/driver/core/CoreTest.scala b/src/test/scala/xyz/driver/core/CoreTest.scala
index e210887..e25bdbe 100644
--- a/src/test/scala/xyz/driver/core/CoreTest.scala
+++ b/src/test/scala/xyz/driver/core/CoreTest.scala
@@ -78,6 +78,16 @@ class CoreTest extends FlatSpec with Matchers with MockitoSugar {
     timestamp.toDate(EST) should not be timestamp.toDate(PST)
   }
 
+  "Date" should "correctly convert to and from String" in {
+
+    import xyz.driver.core.generators.nextDate
+    import date._
+
+    for (date <- 1 to 100 map (_ => nextDate())) {
+      Some(date) should be(Date.fromString(date.toString))
+    }
+  }
+
   "Name" should "have equality and ordering working correctly" in {
 
     (Name[String]("foo") === Name[String]("foo")) should be(true)