Separate extension of scalatra-forms to trait from ControllerBase.

src/main/scala/util/Validations.scala

@@ -0,0 +1,33 @@
+package util
+
+import jp.sf.amateras.scalatra.forms._
+import scala.Some
+
+trait Validations {
+
+  /**
+   * Constraint for the identifier such as user name, repository name or page name.
+   */
+  def identifier: Constraint = new Constraint(){
+    def validate(name: String, value: String): Option[String] =
+      if(!value.matches("^[a-zA-Z0-9\\-_]+$")){
+        Some("%s contains invalid character.".format(name))
+      } else if(value.startsWith("_") || value.startsWith("-")){
+        Some("%s starts with invalid character.".format(name))
+      } else {
+        None
+      }
+  }
+
+  /**
+   * ValueType for the java.util.Date property.
+   */
+  def date(constraints: Constraint*): SingleValueType[java.util.Date] =
+    new SingleValueType[java.util.Date]((pattern("\\d{4}-\\d{2}-\\d{2}") +: constraints): _*){
+      def convert(value: String): java.util.Date = {
+        val formatter = new java.text.SimpleDateFormat("yyyy-MM-dd")
+        formatter.parse(value)
+      }
+    }
+
+}