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package com.drivergrp.core
import java.text.SimpleDateFormat
import java.util.{Calendar, Date, GregorianCalendar}
import scala.concurrent.duration.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
case class Time(millis: Long) extends AnyVal {
def isBefore(anotherTime: Time): Boolean = millis < anotherTime.millis
def isAfter(anotherTime: Time): Boolean = millis > anotherTime.millis
def advanceBy(duration: Duration): Time = Time(millis + duration.length)
}
case class TimeRange(start: Time, end: Time)
implicit def timeOrdering: Ordering[Time] = Ordering.by(_.millis)
def startOfMonth(time: Time) = {
make(new GregorianCalendar()) { cal =>
cal.setTime(new Date(time.millis))
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH))
Time(cal.getTime.getTime)
}
}
def textualDate(time: Time): String =
new SimpleDateFormat("MMMM d, yyyy").format(new Date(time.millis))
def textualTime(time: Time): String =
new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a").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 TimeModule {
def time: TimeProvider
}
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
}
}
}
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