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Diffstat (limited to 'src/main/scala/xyz/driver/core/time.scala')
-rw-r--r-- | src/main/scala/xyz/driver/core/time.scala | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/main/scala/xyz/driver/core/time.scala b/src/main/scala/xyz/driver/core/time.scala new file mode 100644 index 0000000..6ff8209 --- /dev/null +++ b/src/main/scala/xyz/driver/core/time.scala @@ -0,0 +1,75 @@ +package xyz.driver.core + +import java.text.SimpleDateFormat +import java.util._ + +import scala.concurrent.duration._ + +object time { + + // The most useful time units + val Second = 1000L + val Seconds = Second + val Minute = 60 * Seconds + val Minutes = Minute + val Hour = 60 * Minutes + val Hours = Hour + val Day = 24 * Hours + val Days = Day + val Week = 7 * Days + val Weeks = Week + + final case class Time(millis: Long) extends AnyVal { + + def isBefore(anotherTime: Time): Boolean = implicitly[Ordering[Time]].lt(this, anotherTime) + + def isAfter(anotherTime: Time): Boolean = implicitly[Ordering[Time]].gt(this, anotherTime) + + def advanceBy(duration: Duration): Time = Time(millis + duration.toMillis) + } + + object Time { + + implicit def timeOrdering: Ordering[Time] = Ordering.by(_.millis) + } + + final case class TimeRange(start: Time, end: Time) { + def duration: Duration = FiniteDuration(end.millis - start.millis, MILLISECONDS) + } + + def startOfMonth(time: Time) = { + Time(make(new GregorianCalendar()) { cal => + cal.setTime(new Date(time.millis)) + cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH)) + }.getTime.getTime) + } + + def textualDate(timezone: TimeZone)(time: Time): String = + make(new SimpleDateFormat("MMMM d, yyyy"))(_.setTimeZone(timezone)).format(new Date(time.millis)) + + def textualTime(timezone: TimeZone)(time: Time): String = + make(new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a"))(_.setTimeZone(timezone)).format(new Date(time.millis)) + + object provider { + + /** + * Time providers are supplying code with current times + * and are extremely useful for testing to check how system is going + * to behave at specific moments in time. + * + * All the calls to receive current time must be made using time + * provider injected to the caller. + */ + trait TimeProvider { + def currentTime(): Time + } + + final class SystemTimeProvider extends TimeProvider { + def currentTime() = Time(System.currentTimeMillis()) + } + + final class SpecificTimeProvider(time: Time) extends TimeProvider { + def currentTime() = time + } + } +} |