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| 1 | +package com.pubnub.api.utils |
| 2 | + |
| 3 | +import kotlin.js.Date |
| 4 | +import kotlin.time.Duration |
| 5 | +import kotlin.time.Duration.Companion.milliseconds |
| 6 | +import kotlin.time.Duration.Companion.nanoseconds |
| 7 | +import kotlin.time.Duration.Companion.seconds |
| 8 | + |
| 9 | +actual class Instant( |
| 10 | + actual val epochSeconds: Long, |
| 11 | + actual val nanosecondsOfSecond: Int = 0, |
| 12 | +) : Comparable<Instant> { |
| 13 | + actual fun toEpochMilliseconds(): Long { |
| 14 | + return epochSeconds.seconds.inWholeMilliseconds + nanosecondsOfSecond.nanoseconds.inWholeMilliseconds |
| 15 | + } |
| 16 | + |
| 17 | + actual operator fun plus(duration: Duration): Instant { |
| 18 | + val durationWholeSecondsOnly = duration.inWholeSeconds.seconds |
| 19 | + val durationNanosOnly = duration - durationWholeSecondsOnly |
| 20 | + val sum = add(epochSeconds to nanosecondsOfSecond, duration.inWholeSeconds to durationNanosOnly.inWholeNanoseconds.toInt()) |
| 21 | + return Instant(sum.first, sum.second) |
| 22 | + } |
| 23 | + |
| 24 | + actual operator fun minus(duration: Duration): Instant { |
| 25 | + return plus(-duration) |
| 26 | + } |
| 27 | + |
| 28 | + actual operator fun minus(other: Instant): Duration { |
| 29 | + return epochSeconds.seconds + nanosecondsOfSecond.nanoseconds - other.epochSeconds.seconds - other.nanosecondsOfSecond.nanoseconds |
| 30 | + } |
| 31 | + |
| 32 | + actual override operator fun compareTo(other: Instant): Int { |
| 33 | + return epochSeconds.compareTo(other.epochSeconds) |
| 34 | + .takeIf { it != 0 } |
| 35 | + ?: nanosecondsOfSecond.compareTo(other.nanosecondsOfSecond) |
| 36 | + } |
| 37 | + |
| 38 | + private fun add(secondsAndNanos: SecondsAndNanos, secondsAndNanos2: SecondsAndNanos): Pair<Long, Int> { |
| 39 | + val nanosSum = secondsAndNanos.nanos + secondsAndNanos2.nanos |
| 40 | + val secondsFromNanos = nanosSum.inWholeSeconds.seconds |
| 41 | + |
| 42 | + val secondsResult = secondsAndNanos.seconds + secondsAndNanos2.seconds + secondsFromNanos |
| 43 | + val nanosResult = nanosSum - secondsFromNanos |
| 44 | + return secondsResult.inWholeSeconds to nanosResult.inWholeNanoseconds.toInt() |
| 45 | + } |
| 46 | + |
| 47 | + actual companion object { |
| 48 | + actual fun fromEpochMilliseconds(epochMilliseconds: Long): Instant { |
| 49 | + val wholeSeconds = epochMilliseconds.milliseconds.inWholeSeconds |
| 50 | + val nanos = (epochMilliseconds.milliseconds - wholeSeconds.seconds).inWholeNanoseconds |
| 51 | + return Instant(wholeSeconds, nanos.toInt()) |
| 52 | + } |
| 53 | + |
| 54 | + actual fun fromEpochSeconds(epochSeconds: Long, nanosecondAdjustment: Int): Instant { |
| 55 | + return Instant(epochSeconds, nanosecondAdjustment) |
| 56 | + } |
| 57 | + } |
| 58 | +} |
| 59 | + |
| 60 | +actual interface Clock { |
| 61 | + actual fun now(): Instant |
| 62 | + |
| 63 | + actual object System : Clock { |
| 64 | + actual override fun now(): Instant { |
| 65 | + return Instant.fromEpochMilliseconds(Date.now().toLong()) |
| 66 | + } |
| 67 | + } |
| 68 | +} |
| 69 | + |
| 70 | +typealias SecondsAndNanos = Pair<Long, Int> |
| 71 | + |
| 72 | +val SecondsAndNanos.seconds get() = this.first.seconds |
| 73 | +val SecondsAndNanos.nanos get() = this.second.nanoseconds |
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