package com.banksimple.util
import org.scala_tools.time.Imports._
import org.joda.time.format.{DateTimeFormat,DateTimeFormatter}


class SafeDateTimeFormatter(val self: DateTimeFormatter) extends Proxy {
  def safelyParseDateTime(input: String): Option[DateTime] =
    try Some(self.parseDateTime(input))
    catch { case _ => None  }
}

object DateTimeImports {
  implicit def dtf2SafeDtf(in: DateTimeFormatter) = new SafeDateTimeFormatter(in)
}

object DateTimeUnionParser {
  def apply(patterns: String*)(input: String): Option[DateTime] = {
    import DateTimeImports._
    val matchers = patterns.map({DateTimeFormat.forPattern(_)})
    matchers.toStream.flatMap(_.safelyParseDateTime(input)).headOption
  }
}