Multiplatform Date and time library for Kotlin

I'm not able to reference klock in a multiplatform gradle build. Not sure what I'm doing wrong. Here's a minimal example:

build.gradle:

buildscript {
    ext.repos = {
        jcenter()
        mavenCentral()
        maven { url "https://dl.bintray.com/soywiz/soywiz" }
    }
    repositories repos

    dependencies {
        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.11'
    }
}

apply plugin: 'org.jetbrains.kotlin.multiplatform'

repositories repos

kotlin {
    targets {
        fromPreset(presets.jvm, 'jvm')
        fromPreset(presets.js, 'js')
    }
    sourceSets {
        commonMain {
            dependencies {
                api "com.soywiz:klock:1.0.0"
            }
        }
        jvmMain {
            dependencies {
               api "com.soywiz:klock-jvm:1.0.0"
            }
        }
        jsMain {
            dependencies {
               api "com.soywiz:klock-js:1.0.0"
            }
        }
    }
}

src/commonMain/kotlin/main.kt

import com.soywiz.klock.DateTime

val dateTime = DateTime.now()

Gradle error:

:compileKotlinMetadata (Thread[Execution worker for ':',5,main]) started.
e: /Users/asdf/klock/src/commonMain/kotlin/main.kt: (2, 8): Unresolved reference: com
e: /Users/asdf/klock/src/commonMain/kotlin/main.kt: (5, 16): Unresolved reference: DateTime

> Task :compileKotlinMetadata FAILED

This change will expose a regex string which matches the text of a correctly-formatted date, which can be composed into a larger regex.

It achieves this by taking an already existing part of the code for the internal regex rx2, and moving it into a function which is made public.

I need this change for a program which has to be able to match and extract timestamps in context. This will allow the regex fragment matching the timestamp to be combined with regex fragments matching the expected strings around the timestamp, for efficiently locating candidate timestamps in a single regex search.

Hi, i am facing problem after updated IntelliJ. I also have updated my kotlin version to 1.3.60

IntelliJ IDEA 2019.2.1 (Community Edition)
Build #IC-192.6262.58, built on August 20, 2019
Runtime version: 11.0.3+12-b304.39 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

Previous version i never face any issue, but in this build, i face this error. Now I am using version 1.8.0

Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6. Please specify proper '-jvm-target' option

FAILURE: Build failed with an exception.

Here is the code in my commonMain folder

var timeZone = TimeSpan((8.hours).milliseconds)

I have changed my project JVM version setting to 1.6.

Is there anything that I have to do to solve this issue? Hopefully you can guide me on this. Thanks!

Hello,

I followed the instructions in the README, but I'm getting the following error :

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':shared:compileKotlinIOS'.
> Could not resolve all task dependencies for configuration ':shared:iOSCompileKlibraries'.
   > Could not resolve com.soywiz.korlibs.klock:klock:1.4.0.
     Required by:
         project :shared
      > Could not resolve com.soywiz.korlibs.klock:klock:1.4.0.
         > Could not parse module metadata https://dl.bintray.com/korlibs/korlibs/com/soywiz/korlibs/klock/klock/1.4.0/klock-1.4.0.module
            > Unsupported format version '1.0' specified in module metadata. This version of Gradle supports format version 0.4 only.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 5s

For reference, here are the instructions that I followed.

def klockVersion = "1.4.0"

repositories {
    maven { url "https://dl.bintray.com/korlibs/korlibs" }
}

kotlin {
    sourceSets {
        commonMain {
            dependencies {
                implementation "com.soywiz.korlibs.klock:klock:$klockVersion" // Common 
            }
        }
    }
}

settings.gradle

enableFeaturePreview('GRADLE_METADATA')

I am on Kotlin 1.4.10 and 2.0.0-alpha.

When I try to access properties of DateTimeTz I get an error.

final double nowOffsetInMillis = DateTimeTz.Companion.nowLocal().getOffset();

But then the compiler complains:

error: cannot find symbol final double nowOffsetInMillis = DateTimeTz.Companion.nowLocal().getOffset(); ^ symbol: method getOffset() location: class DateTimeTz

It basically happens on any property, not only 'offset'

Any ideas?

I faced with problem of how to parse date-time with floating number of symbol positions. In other words, I am getting timestamps which were generated by java Instant and I can get either

2020-09-30T09:20:00.993Z

or

2020-09-30T09:20:00.0Z

As you can see, there is different number of positions which are used for milliseconds 993Z and 0Z hence, when I am trying to parse with following format, I am getting an error in second case

"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"  

I am asking this because there is no documentation in library code and there is no documentation of how to skip the unnecessary part of timestamp when parsing

It was nice to use inline classes for some of the types, but unfortunately the Swift interoperability is greatly hampered by this. For example, a function that returns a Date or a DateTime when translated to Swift it simply becomes int32_t and the Date and DateTime classes are not accessible at all from Swift. This makes it extremely to write iOS apps dealing with dates. While it would be nice to be able to write all code in Kotlin without resorting to Swift, the fact that you can't export a UIViewController class to IOS makes that unrealistic

Formatting with sub-second precision seems to not work:

This:

val badUtc = DateTime(
date = Date(2020, 1, 4 ),
time = Time(2, 42,55, millisecond = 500)
val thisWorks = badUtc.format(ISO8601.DATETIME_COMPLETE)
val thisDoesNot = badUtc.format(ISO8601.IsoDateTimeFormat("YYYYMMDDThhmmss,ss", "YYYY-MM-DDThh:mm:ss,ss"))
println("thisWorks=$thisWorks")
println("thisDoesNot=$thisDoesNot")

Prints this:

thisWorks=2020-01-04T02:42:55
thisDoesNot=2020-01-04T02:42:75,50

The error seems to be here:

https://github.com/korlibs/klock/blob/f499c4a9f0590d7e23e9acdaf349d8e7deb9b162/klock/src/commonMain/kotlin/com/soywiz/klock/ISO8601.kt#L41

I have DateTimeTz with correct TimeZone but when I am formatting it

val timeFormat = DateFormat("hh:mm")
val time = dateTimeTz.format(timeFormat)

I am getting time in UTC without adjected time zone

Given a timestamp as a DateTimeTz value:

timestamp.format(ISO8601.IsoDateTimeFormat(null, "YYYY-MM-DDThh:mm:ss.sssZ"))

does not work since it wants to try to parse the fractional part as seconds.

If I use version 0.2.2 I can use the library. If I upgrade to 1.0.0, gradle is doing the synchronization, but I can not compile because I don't see the DateTime class.

Any suggestions?