workflows fix

0.7.0

.github/workflows/kdocs.yml

@@ -0,0 +1,24 @@
+name: Publish KDocs
+on:
+  push:
+    branches:
+      - master
+jobs:
+  publishing:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Fix android 32.0.0 dx
+        continue-on-error: true
+        run: cd /usr/local/lib/android/sdk/build-tools/32.0.0/ && cp d8 dx && cd lib  && cp d8.jar dx.jar
+      - name: Build
+        run: ./gradlew dokkaHtml
+      - name: Publish KDocs
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./build/dokka/html
+          publish_branch: kdocs

.github/workflows/publishing_packages.yml

@@ -1,4 +1,3 @@
-
 name: Publish package to GitHub Packages
 on: [push]
 jobs:
@@ -8,7 +7,10 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: 11
+      - name: Fix android 32.0.0 dx
+        continue-on-error: true
+        run: cd /usr/local/lib/android/sdk/build-tools/32.0.0/ && cp d8 dx && cd lib  && cp d8.jar dx.jar
       - name: Update version
         run: |
           branch="`echo "${{ github.ref }}" | grep -o "[^/]*$"`"
@@ -16,7 +18,8 @@ jobs:
       - name: prebuild
         run: ./gradlew clean build
       - name: Publish package
-        run: ./gradlew --no-parallel publishAllPublicationsToGithubPackagesRepository -x signJsPublication -x signJvmPublication -x signKotlinMultiplatformPublication -x signMetadataPublication -x signAndroidDebugPublication -x signAndroidReleasePublication
+        continue-on-error: true
+        run: ./gradlew --no-parallel publishAllPublicationsToGithubPackagesRepository -x signJsPublication -x signJvmPublication -x signKotlinMultiplatformPublication -x signAndroidReleasePublication -x signAndroidDebugPublication -x signAndroidReleasePublication
         env:
           GITHUBPACKAGES_USER: ${{ github.actor }}
           GITHUBPACKAGES_PASSWORD: ${{ secrets.GITHUB_TOKEN }}

.travis.yml

@@ -1,10 +0,0 @@
-language: java
-install: true
-
-os: linux
-dist: trusty
-jdk: oraclejdk8
-
-script:
-  - ./gradlew build allTests -s
-

CHANGELOG.md

@@ -1,5 +1,80 @@
 # Changelog
 
+## 0.7.1
+
+* Versions
+  * `Klock`: `2.5.2`
+
+## 0.7.0
+
+**ALL DEPRECATIONS HAVE BEEN REMOVED**
+
+* Versions
+  * `Kotlin`: `1.6.10`
+  * `Klock`: `2.4.10`
+  * `Coroutines`: `1.6.0`
+  * `Androidx Work`: `2.7.1`
+
+## 0.6.6
+
+* Versions
+  * `Klock`: `2.4.8`
+  * `Androidx Work`: `2.7.0`
+
+## 0.6.5
+
+* Flows now use `doWhile` functions
+* `doWhile` now use additional delay (for 1 ms) for cases when `block` executing too fast
+* New extensions for `KronScheduler`: `do(Once/While/Infinity)Local`/`do(Once/While/Infinity)Tz`
+
+## 0.6.4
+
+* Versions
+  * `Kotlin`: `1.5.31`
+  * `Coroutines`: `1.5.2`
+  * `Klock`: `2.4.2`
+  * `Androidx Work`: `2.6.0`
+
+## 0.6.3
+
+* Versions
+  * `Kotlin`: `1.5.30`
+  * `Klock`: `2.4.0`
+
+## 0.6.2
+
+**LEGACY COMPILER VARIANT FOR JS IS NOT AVAILABLE SINCE THIS UPDATE**
+
+* Versions
+  * `Kotlin`: `1.5.21`
+  * `Coroutines`: `1.5.1`
+  * `Klock`: `2.3.1`
+
+## 0.6.1
+
+* Versions
+  * `Klock`: `2.1.0` -> `2.1.2`
+* Rewriting of default mechanism of `KronScheduler`s
+
+## 0.6.0
+
+* Versions
+  * `Kotlin`: `1.4.32` -> `1.5.10`
+  * `Coroutines`: `1.4.3` -> `1.5.0`
+  * `Klock`: `2.0.7` -> `2.1.0`
+
+## 0.5.2
+
+* Versions
+  * `Kotlin`: `1.4.31` -> `1.4.32`
+* Supporting of weekdays
+* Supporting of timezones
+  * Any `KronScheduler` now can be used for calling `next` with `DateTimeTz`
+  * New type `KronSchedulerTz`
+* `SchedulerFlow` has been deprecated
+* New extension `asTzFlow` and small changes in `asFlow` logic
+* `merge` extensions now return `CollectionKronScheduler` instead of just `KronScheduler`
+
 ## 0.5.1
 
 * Versions

README.md

@@ -1,20 +1,12 @@
 # krontab
 
- [![Download](https://api.bintray.com/packages/insanusmokrassar/InsanusMokrassar/krontab-mpp/images/download.svg) ](https://bintray.com/insanusmokrassar/InsanusMokrassar/krontab-mpp/_latestVersion)
  [![Maven Central](https://maven-badges.herokuapp.com/maven-central/dev.inmo/krontab/badge.svg)](https://maven-badges.herokuapp.com/maven-central/dev.inmo/krontab)
- [![Build Status](https://travis-ci.com/InsanusMokrassar/krontab.svg?branch=master)](https://travis-ci.com/InsanusMokrassar/krontab)
+ [![Build Status](https://github.com/InsanusMokrassar/krontab/actions/workflows/publishing_packages.yml/badge.svg)](https://github.com/InsanusMokrassar/krontab/actions/workflows/publishing_packages.yml)
+ [![KDocs](https://raw.githubusercontent.com/InsanusMokrassar/badges/master/kdocs.svg)](https://krontab.inmo.dev/index.html)
  
 Library was created to give oppotunity to launch some things from time to time according to some schedule in
 runtime of applications.
 
-| Table of content |
-|---|
-| [ How to use ](#how-to-use) |
-| [ How to use: Including in project ](#including-in-project) |
-| [ How to use: Config from string ](#config-from-string) |
-| [ How to use: Config via builder (DSL preview) ](#config-via-builder) |
-| [ How to use: KronScheduler as a Flow ](#KronScheduler-as-a-Flow) |
-
 ## How to use
 
 There are several ways to configure and use this library:
@@ -44,7 +36,7 @@ implementation "dev.inmo:krontab:$krontab_version"
 
 Next version is the latest currently for the library:
 
-[ ![Download](https://api.bintray.com/packages/insanusmokrassar/InsanusMokrassar/krontab-mpp/images/download.svg) ](https://bintray.com/insanusmokrassar/InsanusMokrassar/krontab-mpp/_latestVersion)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/dev.inmo/krontab/badge.svg)](https://maven-badges.herokuapp.com/maven-central/dev.inmo/krontab)
 
 For old version of Gradle, instead of `implementation` word developers must use `compile`.
 
@@ -52,14 +44,17 @@ For old version of Gradle, instead of `implementation` word developers must use
 
 Developers can use more simple way to configure repeat times is string. String configuring
 like a `crontab`, but with a little bit different meanings:
+
 ```
-/---------- Seconds
-| /-------- Minutes
-| | /------ Hours
-| | | /---- Days of months
-| | | | /-- Months
-| | | | | / (optional) Year
-* * * * * *
+/--------------- Seconds
+| /------------- Minutes
+| | /----------- Hours
+| | | /--------- Days of months
+| | | | /------- Months
+| | | | | /----- (optional) Year
+| | | | | | /--- (optional) Timezone offset
+| | | | | | |  / (optional) Week days
+* * * * * * 0o *w
 ```
 
 It is different with original `crontab` syntax for the reason, that expected that in practice developers
@@ -128,6 +123,38 @@ kronScheduler.doInfinity {
 
 All of these examples will do the same things: print `Called` message every five seconds.
 
+### do\* functions
+
+With regular `doOnce`/`doWhile`/`doInfinity` there are two types of their variations: **local** and **timezoned**. Local
+variations (`doOnceLocal`/`doWhileLocal`/`doInfinityLocal`) will pass `DateTime` as an argument into the block:
+
+```kotlin
+doInfinityLocal("/5 * * * *") {
+    println(it) // will print current date time
+}
+```
+
+Timezoned variations (`doOnceTz`/`doWhileTz`/`doInfinityTz`) will do the same thing but pass as an argument `DateTimeTz`:
+
+```kotlin
+doInfinityTz("/5 * * * * 0o") {
+    println(it) // will print current date time in UTC
+}
+```
+
+It is useful in cases when you need to get the time of calling and avoid extra calls to system time.
+
+#### Helpful table for 
+
+|  | No args | Local `DateTime` | Local `DateTimeTz` with offset of `KronScheduler` |
+|---| ------- | ---------------- | ------------------------------------------------- |
+| **Call only near time** | doOnce | doOnceLocal | doOnceTz |
+| **Call while condition is true** | doWhile | doWhileLocal | doWhileTz |
+| **Work infinity*** | doInfinity | doInfinityLocal | doInfinityTz |
+
+*Here there is an important notice, that `Work infinity` is not exactly `infinity`. Actually, that means that `do while
+coroutine is alive` and in fact executing will be stopped when coroutine became cancelled.
+
 ### KronScheduler as a Flow
 
 Any `KronScheduler`can e converted to a `Flow<DateTime` using extension `asFlow`:
@@ -152,3 +179,27 @@ flow.takeWhile {
     action()
 }
 ```
+
+### Offsets
+
+Offsets in this library works via passing parameter ending with `o` in any place after `month` config. Currently
+there is only one format supported for offsets: minutes of offsets. To use time zones you will need to call `next`
+method with `DateTimeTz` argument or `nextTimeZoned` method with any `KronScheduler` instance, but in case if this
+scheduler is not instance of `KronSchedulerTz` it will work like you passed just `DateTime`.
+
+Besides, in case you wish to use time zones explicitly, you will need to get `KronSchedulerTz`. It is possible by:
+
+* Using `createSimpleScheduler`/`buildSchedule`/`KrontabTemplate#toSchedule`/`KrontabTemplate#toKronScheduler` methods
+with passing `defaultOffset` parameter
+* Using `SchedulerBuilder#build`/`createSimpleScheduler`/`buildSchedule`/`KrontabTemplate#toSchedule`/`KrontabTemplate#toKronScheduler`
+methods with casting to `KronSchedulerTz` in case you are pretty sure that it is timezoned `KronScheduler`
+* Creating your own implementation of `KronSchedulerTz`
+
+### Note about week days
+
+Unlike original CRON, here week days:
+
+* Works as `AND`: cron date time will search first day which will pass requirement according all parameters including
+week days
+* You may use any related to numbers syntax with week days: `0-3w`, `0,1,2,3w`, etc.
+* Week days (like years and offsets) are optional and can be placed anywhere after `month`

build.gradle

@@ -1,7 +1,7 @@
 buildscript {
     repositories {
         mavenLocal()
-        jcenter()
+        // jcenter()
         mavenCentral()
         google()
     }
@@ -10,7 +10,7 @@ buildscript {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "com.github.breadmoirai:github-release:$github_release_plugin_version"
         classpath "com.getkeepsafe.dexcount:dexcount-gradle-plugin:$dexcount_version"
-        classpath 'com.android.tools.build:gradle:4.0.2'
+        classpath 'com.android.tools.build:gradle:7.0.4'
     }
 }
 
@@ -18,6 +18,18 @@ plugins {
     id "org.jetbrains.kotlin.multiplatform" version "$kotlin_version"
     id "org.jetbrains.dokka" version "$dokka_version"
 }
+
+// temporal crutch until legacy tests will be stabled or legacy target will be removed
+allprojects {
+    if (it != rootProject.findProject("docs")) {
+        tasks.whenTaskAdded { task ->
+            if(task.name == "jsLegacyBrowserTest" || task.name == "jsLegacyNodeTest") {
+                task.enabled = false
+            }
+        }
+    }
+}
+
 apply plugin: "com.android.library"
 
 project.version = "$version"
@@ -28,9 +40,9 @@ apply from: "github_release.gradle"
 
 repositories {
     mavenLocal()
-    jcenter()
+    // jcenter()
     mavenCentral()
-    maven { url "https://kotlin.bintray.com/kotlinx" }
+    // maven { url "https://kotlin.bintray.com/kotlinx" }
     google()
 }
 
@@ -38,7 +50,7 @@ apply from: './dokka.gradle'
 
 kotlin {
     jvm()
-    js(BOTH) {
+    js(IR) {
         browser()
         nodejs()
     }
@@ -113,10 +125,6 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8.toString()
-    }
-
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
         test {
@@ -124,3 +132,8 @@ android {
         }
     }
 }
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}

dokka.gradle

@@ -15,31 +15,40 @@ dokkaHtml {
     }
 
     moduleName.set("kdocs")
-
+    
     dokkaSourceSets {
-        configureEach {
-            skipDeprecated.set(true)
-            includeNonPublic.set(true)
-            reportUndocumented.set(true)
+        switch (true) {
+            case project.hasProperty("DOKKA_PATH"):
+                outputDirectory = new File(project.property("DOKKA_PATH").toString())
+                break
+            case System.getenv("DOKKA_PATH") != null:
+                outputDirectory = new File(System.getenv("DOKKA_PATH"))
+                break
+        }
 
-            sourceLink {
-                localDirectory.set(file("./"))
-                remoteUrl.set(new URL("https://github.com/InsanusMokrassar/krontab/blob/master/"))
-                remoteLineSuffix.set("#L")
+        dokkaSourceSets {
+            configureEach {
+                skipDeprecated.set(true)
+
+                sourceLink {
+                    localDirectory.set(file("./"))
+                    remoteUrl.set(new URL("https://github.com/InsanusMokrassar/krontab/blob/master/"))
+                    remoteLineSuffix.set("#L")
+                }
             }
-        }
 
-        named("commonMain") {
-            sourceRoot { path = "src/commonMain" }
-        }
+            named("commonMain") {
+                sourceRoots.setFrom(findSourcesWithName("commonMain"))
+            }
 
 //
-//        named("jsMain") {
-//            sourceRoot { path = "src/jsMain" }
-//        }
+//            named("jsMain") {
+//                sourceRoot { path = "src/jsMain" }
+//            }
 //
-//        named("jvmMain") {
-//            sourceRoot { path = "src/jvmMain" }
-//        }
+//            named("jvmMain") {
+//                sourceRoot { path = "src/jvmMain" }
+//            }
+        }
     }
 }

gradle.properties

@@ -8,12 +8,12 @@ android.useAndroidX=true
 android.enableJetifier=false
 
 
-kotlin_version=1.4.31
-kotlin_coroutines_version=1.4.3
+kotlin_version=1.6.10
+kotlin_coroutines_version=1.6.0
 
-dokka_version=1.4.20
+dokka_version=1.6.10
 
-klockVersion=2.0.7
+klockVersion=2.5.2
 
 ## Github reease
 
@@ -22,17 +22,16 @@ github_release_plugin_version=2.2.12
 ## Android
 
 android_minSdkVersion=19
-android_compileSdkVersion=30
-android_buildToolsVersion=30.0.2
-dexcount_version=2.0.0
+android_compileSdkVersion=32
+android_buildToolsVersion=32.0.0
+dexcount_version=3.0.0
 junit_version=4.12
 test_ext_junit_version=1.1.2
 espresso_core=3.3.0
 
-androidx_work_version=2.5.0
+androidx_work_version=2.7.1
 
 ## Common
 
-version=0.5.1
-android_code_version=2
-
+version=0.7.1
+android_code_version=12

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip

src/commonMain/kotlin/dev/inmo/krontab/Executes.kt

@@ -1,7 +1,10 @@
 package dev.inmo.krontab
 
 import com.soywiz.klock.DateTime
+import com.soywiz.klock.DateTimeTz
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlin.coroutines.coroutineContext
 
 /**
  * Execute [block] once at the [KronScheduler.next] time and return result of [block] calculation.
@@ -10,29 +13,109 @@ import kotlinx.coroutines.delay
  *
  * WARNING!!! In case if [KronScheduler.next] of [this] instance will return null, [block] will be called immediately
  */
-suspend inline fun <T> KronScheduler.doOnce(noinline block: suspend () -> T): T {
-    next() ?.let {
+suspend inline fun <T> KronScheduler.doOnceLocal(noinline block: suspend (DateTime) -> T): T {
+    val time = nextOrNow().also {
         delay((it - DateTime.now()).millisecondsLong)
     }
-    return block()
+    return block(time)
 }
 
 /**
- * Will [buildSchedule] using [scheduleConfig] and call [doOnce] on it
+ * Execute [block] once at the [KronScheduler.next] time and return result of [block] calculation.
+ *
+ * WARNING!!! If you want to launch it in parallel, you must do this explicitly.
+ *
+ * WARNING!!! In case if [KronScheduler.next] of [this] instance will return null, [block] will be called immediatelly
+ */
+suspend inline fun <T> KronScheduler.doOnceTz(noinline block: suspend (DateTimeTz) -> T): T {
+    val time = when (this) {
+        is KronSchedulerTz -> nextOrNowWithOffset()
+        else -> nextOrNow().local
+    }
+    delay((time - DateTimeTz.nowLocal()).millisecondsLong)
+    return block(time)
+}
+
+/**
+ * Execute [block] once at the [KronScheduler.next] time and return result of [block] calculation.
+ *
+ * WARNING!!! If you want to launch it in parallel, you must do this explicitly.
+ *
+ * WARNING!!! In case if [KronScheduler.next] of [this] instance will return null, [block] will be called immediately
+ */
+suspend inline fun <T> KronScheduler.doOnce(noinline block: suspend () -> T): T = doOnceLocal { _ -> block() }
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doOnceLocal] on it
+ * @see buildSchedule
+ */
+suspend inline fun <T> doOnce(
+    scheduleConfig: String,
+    noinline block: suspend (DateTime) -> T
+) = buildSchedule(scheduleConfig).doOnceLocal(block)
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doOnceLocal] on it
+ * @see buildSchedule
+ */
+suspend inline fun <T> doOnceTz(
+    scheduleConfig: String,
+    noinline block: suspend (DateTimeTz) -> T
+) = buildSchedule(scheduleConfig).doOnceTz(block)
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doOnceLocal] on it
  * @see buildSchedule
  */
 suspend inline fun <T> doOnce(
     scheduleConfig: String,
     noinline block: suspend () -> T
-) = buildSchedule(scheduleConfig).doOnce(block)
+) = doOnce(scheduleConfig) { _ -> block() }
+
 
 /**
  * Will execute [block] while it will return true as a result of its calculation
  */
-suspend inline fun KronScheduler.doWhile(noinline block: suspend () -> Boolean) {
-    do { val doNext = doOnce(block) } while (doNext)
+suspend inline fun KronScheduler.doWhileLocal(noinline block: suspend (DateTime) -> Boolean) {
+    do {
+        delay(1L)
+    } while (doOnceLocal(block))
 }
 
+/**
+ * Will execute [block] while it will return true as a result of its calculation
+ */
+suspend inline fun KronScheduler.doWhileTz(noinline block: suspend (DateTimeTz) -> Boolean) {
+    do {
+        delay(1L)
+    } while (doOnceTz(block))
+}
+
+/**
+ * Will execute [block] while it will return true as a result of its calculation
+ */
+suspend inline fun KronScheduler.doWhile(noinline block: suspend () -> Boolean) = doWhileLocal { block() }
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doWhile] with [block]
+ *
+ * @see buildSchedule
+ */
+suspend inline fun doWhileLocal(
+    scheduleConfig: String,
+    noinline block: suspend (DateTime) -> Boolean
+) = buildSchedule(scheduleConfig).doWhileLocal(block)
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doWhile] with [block]
+ *
+ * @see buildSchedule
+ */
+suspend inline fun doWhileTz(
+    scheduleConfig: String,
+    noinline block: suspend (DateTimeTz) -> Boolean
+) = buildSchedule(scheduleConfig).doWhileTz(block)
+
 /**
  * Will [buildSchedule] using [scheduleConfig] and call [doWhile] with [block]
  *
@@ -41,15 +124,53 @@ suspend inline fun KronScheduler.doWhile(noinline block: suspend () -> Boolean)
 suspend inline fun doWhile(
     scheduleConfig: String,
     noinline block: suspend () -> Boolean
-) = buildSchedule(scheduleConfig).doWhile(block)
+) = doWhileLocal(scheduleConfig) { block() }
+
+
+/**
+ * Will execute [block] without any checking of result
+ */
+suspend inline fun KronScheduler.doInfinityLocal(noinline block: suspend (DateTime) -> Unit) = doWhileLocal {
+    block(it)
+    coroutineContext.isActive
+}
+
+/**
+ * Will execute [block] without any checking of result
+ */
+suspend inline fun KronScheduler.doInfinityTz(noinline block: suspend (DateTimeTz) -> Unit) = doWhileTz {
+    block(it)
+    coroutineContext.isActive
+}
 
 /**
  * Will execute [block] without any checking of result
  */
 suspend inline fun KronScheduler.doInfinity(noinline block: suspend () -> Unit) = doWhile {
     block()
-    true
+    coroutineContext.isActive
 }
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doInfinity] with [block]
+ *
+ * @see buildSchedule
+ */
+suspend inline fun doInfinityLocal(
+    scheduleConfig: String,
+    noinline block: suspend (DateTime) -> Unit
+) = buildSchedule(scheduleConfig).doInfinityLocal(block)
+
+/**
+ * Will [buildSchedule] using [scheduleConfig] and call [doInfinity] with [block]
+ *
+ * @see buildSchedule
+ */
+suspend inline fun doInfinityTz(
+    scheduleConfig: String,
+    noinline block: suspend (DateTimeTz) -> Unit
+) = buildSchedule(scheduleConfig).doInfinityTz(block)
+
 /**
  * Will [buildSchedule] using [scheduleConfig] and call [doInfinity] with [block]
  *

src/commonMain/kotlin/dev/inmo/krontab/KronScheduler.kt

@@ -1,7 +1,6 @@
 package dev.inmo.krontab
 
 import com.soywiz.klock.DateTime
-import dev.inmo.krontab.internal.toNearDateTime
 
 /**
  * This interface was created for abstraction of [next] operation. Currently, there is only

src/commonMain/kotlin/dev/inmo/krontab/KronSchedulerTz.kt

@@ -0,0 +1,34 @@
+package dev.inmo.krontab
+
+import com.soywiz.klock.DateTime
+import com.soywiz.klock.DateTimeTz
+
+/**
+ * This interface extending [KronScheduler] to use [DateTimeTz] with taking into account offset of incoming time for
+ * [next] operation.
+ *
+ * @see dev.inmo.krontab.internal.CronDateTimeScheduler
+ * @see dev.inmo.krontab.KronScheduler
+ */
+interface KronSchedulerTz : KronScheduler {
+    suspend fun next(relatively: DateTimeTz): DateTimeTz?
+
+    override suspend fun next(relatively: DateTime): DateTime? = next(relatively.localUnadjusted) ?.local
+}
+
+suspend fun KronSchedulerTz.nextOrRelative(relatively: DateTimeTz): DateTimeTz = next(relatively) ?: getAnyNext(
+    relatively.local
+).toOffsetUnadjusted(relatively.offset)
+suspend fun KronSchedulerTz.nextOrNowWithOffset(): DateTimeTz = DateTimeTz.nowLocal().let {
+    next(it) ?: getAnyNext(
+        it.local
+    ).toOffsetUnadjusted(it.offset)
+}
+
+suspend fun KronScheduler.next(relatively: DateTimeTz) = if (this is KronSchedulerTz) {
+    this.next(relatively)
+} else {
+    this.next(relatively.local) ?.toOffsetUnadjusted(relatively.offset)
+}
+
+suspend fun KronScheduler.nextTimeZoned() = next(DateTime.now().local)

src/commonMain/kotlin/dev/inmo/krontab/KronSchedulersMerging.kt

@@ -1,8 +1,8 @@
 package dev.inmo.krontab
 
 import dev.inmo.krontab.collection.CollectionKronScheduler
-import dev.inmo.krontab.internal.CronDateTime
-import dev.inmo.krontab.internal.CronDateTimeScheduler
+import dev.inmo.krontab.collection.includeAll
+import dev.inmo.krontab.internal.*
 
 /**
  * Create new one [CollectionKronScheduler] to include all [KronScheduler]s of [this] [Iterator]
@@ -10,17 +10,22 @@ import dev.inmo.krontab.internal.CronDateTimeScheduler
  * @see CollectionKronScheduler
  * @see CollectionKronScheduler.include
  */
-fun Iterator<KronScheduler>.merge(): KronScheduler {
+fun Iterator<KronScheduler>.merge(): CollectionKronScheduler {
     val cronDateTimes = mutableListOf<CronDateTime>()
+    val timezonedCronDateTimes = mutableListOf<CronDateTimeSchedulerTz>()
     val collectionScheduler = CollectionKronScheduler()
     forEach {
         when (it) {
-            is CronDateTimeScheduler -> cronDateTimes.addAll(it.cronDateTimes)
+            is CronDateTimeScheduler -> cronDateTimes.add(it.cronDateTime)
+            is CronDateTimeSchedulerTz -> timezonedCronDateTimes.add(it)
             else -> collectionScheduler.include(it)
         }
     }
     if (cronDateTimes.isNotEmpty()) {
-        collectionScheduler.include(CronDateTimeScheduler(cronDateTimes))
+        collectionScheduler.include(CronDateTimeScheduler(cronDateTimes.merge()))
+    }
+    if (timezonedCronDateTimes.isNotEmpty()) {
+        collectionScheduler.includeAll(mergeCronDateTimeSchedulers(timezonedCronDateTimes))
     }
     return collectionScheduler
 }
@@ -32,10 +37,10 @@ fun Iterator<KronScheduler>.merge(): KronScheduler {
  * @see CollectionKronScheduler.include
  */
 @Suppress("NOTHING_TO_INLINE")
-inline fun Iterable<KronScheduler>.merge(): KronScheduler = iterator().merge()
+inline fun Iterable<KronScheduler>.merge(): CollectionKronScheduler = iterator().merge()
 
 /**
  * @return Vararg shortcut for [merge]
  */
 @Suppress("NOTHING_TO_INLINE")
-inline fun merge(vararg kronDateTimeSchedulers: KronScheduler) = kronDateTimeSchedulers.iterator().merge()
+inline fun merge(vararg kronDateTimeSchedulers: KronScheduler): CollectionKronScheduler = kronDateTimeSchedulers.iterator().merge()

src/commonMain/kotlin/dev/inmo/krontab/SchedulerShortcuts.kt

@@ -3,8 +3,6 @@ package dev.inmo.krontab
 import com.soywiz.klock.DateTime
 import dev.inmo.krontab.builder.buildSchedule
 import dev.inmo.krontab.internal.*
-import dev.inmo.krontab.internal.CronDateTime
-import dev.inmo.krontab.internal.CronDateTimeScheduler
 
 internal val anyCronDateTime by lazy {
     CronDateTime()
@@ -15,7 +13,7 @@ internal fun getAnyNext(relatively: DateTime) = anyCronDateTime.toNearDateTime(r
  * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now]
  */
 val AnyTimeScheduler: KronScheduler by lazy {
-    CronDateTimeScheduler(listOf(anyCronDateTime))
+    CronDateTimeScheduler(anyCronDateTime)
 }
 
 /**
@@ -58,4 +56,4 @@ val EveryMonthScheduler: KronScheduler by lazy {
  */
 val EveryYearScheduler: KronScheduler by lazy {
     buildSchedule { years { 0 every 1 } }
-}
+}

src/commonMain/kotlin/dev/inmo/krontab/StringParser.kt

@@ -1,6 +1,9 @@
 package dev.inmo.krontab
 
+import com.soywiz.klock.TimezoneOffset
+import com.soywiz.klock.minutes
 import dev.inmo.krontab.internal.*
+import dev.inmo.krontab.utils.Minutes
 
 /**
  * @see createSimpleScheduler
@@ -17,8 +20,10 @@ typealias KrontabTemplate = String
  * * dayOfMonth
  * * month
  * * (optional) year
+ * * (optional) (can be placed anywhere after month) (must be marked with `o` at the end, for example: 60o == +01:00) offset
+ * * (optional) (can be placed anywhere after month) dayOfWeek
  *
- * And each one have next format:
+ * And each one (except of offsets) have next format:
  *
  * `{number}[,{number},...]` or `*`
  *
@@ -31,6 +36,9 @@ typealias KrontabTemplate = String
  * * F
  * * L
  *
+ * Week days must be marked with `w` at the end, and starts with 0 which means Sunday. For example, 0w == Sunday. With
+ * weeks you can use syntax like with any number like seconds, for example: 0-2w means Sunday-Tuesday
+ *
  * Additional info about ranges can be found in follow accordance:
  *
  * * Seconds ranges can be found in [secondsRange]
@@ -39,6 +47,7 @@ typealias KrontabTemplate = String
  * * Days of month ranges can be found in [dayOfMonthRange]
  * * Months ranges can be found in [monthRange]
  * * Years ranges can be found in [yearRange] (in fact - any [Int])
+ * * WeekDay (timezone) ranges can be found in [dayOfWeekRange]
  *
  * Examples:
  *
@@ -46,14 +55,41 @@ typealias KrontabTemplate = String
  * * "0/5,L * * * *" for every five seconds triggering and on 59 second
  * * "0/15 30 * * *" for every 15th seconds in a half of each hour
  * * "1 2 3 F,4,L 5" for triggering in near first second of second minute of third hour of fourth day of may
+ * * "1 2 3 F,4,L 5 60o" for triggering in near first second of second minute of third hour of fourth day of may with timezone UTC+01:00
+ * * "1 2 3 F,4,L 5 60o 0-2w" for triggering in near first second of second minute of third hour of fourth day of may in case if it will be in Sunday-Tuesday week days with timezone UTC+01:00
  * * "1 2 3 F,4,L 5 2021" for triggering in near first second of second minute of third hour of fourth day of may of 2021st year
+ * * "1 2 3 F,4,L 5 2021 60o" for triggering in near first second of second minute of third hour of fourth day of may of 2021st year with timezone UTC+01:00
+ * * "1 2 3 F,4,L 5 2021 60o 0-2w" for triggering in near first second of second minute of third hour of fourth day of may of 2021st year if it will be in Sunday-Tuesday week days with timezone UTC+01:00
+ *
+ * @return In case when offset parameter is absent in [incoming] will be used [createSimpleScheduler] method and
+ * returned [CronDateTimeScheduler]. In case when offset parameter there is in [incoming] [KrontabTemplate] will be used
+ * [createKronSchedulerWithOffset] and returned [CronDateTimeSchedulerTz]
  *
  * @see dev.inmo.krontab.internal.createKronScheduler
  */
-fun createSimpleScheduler(incoming: KrontabTemplate): KronScheduler {
-    val yearSource: String?
+fun createSimpleScheduler(
+    incoming: KrontabTemplate
+): KronScheduler {
+    var offsetParsed: Int? = null
+    var dayOfWeekParsed: Array<Byte>? = null
+    var yearParsed: Array<Int>? = null
     val (secondsSource, minutesSource, hoursSource, dayOfMonthSource, monthSource) = incoming.split(" ").also {
-        yearSource = it.getOrNull(5)
+        listOfNotNull(
+            it.getOrNull(5),
+            it.getOrNull(6),
+            it.getOrNull(7)
+        ).forEach {
+            val offsetFromString = parseOffset(it)
+            val dayOfWeekFromString = parseWeekDay(it)
+            offsetParsed = offsetParsed ?: offsetFromString
+            dayOfWeekParsed = dayOfWeekParsed ?: dayOfWeekFromString
+            when {
+                dayOfWeekFromString != null || offsetFromString != null -> return@forEach
+                yearParsed == null -> {
+                    yearParsed = parseYears(it)
+                }
+            }
+        }
     }
 
     val secondsParsed = parseSeconds(secondsSource)
@@ -61,24 +97,54 @@ fun createSimpleScheduler(incoming: KrontabTemplate): KronScheduler {
     val hoursParsed = parseHours(hoursSource)
     val dayOfMonthParsed = parseDaysOfMonth(dayOfMonthSource)
     val monthParsed = parseMonths(monthSource)
-    val yearParsed = parseYears(yearSource)
 
-    return createKronScheduler(
-        secondsParsed, minutesParsed, hoursParsed, dayOfMonthParsed, monthParsed, yearParsed
+    return offsetParsed ?.let { offset ->
+        createKronSchedulerWithOffset(
+            secondsParsed, minutesParsed, hoursParsed, dayOfMonthParsed, monthParsed, yearParsed, dayOfWeekParsed, TimezoneOffset(offset.minutes)
+        )
+    } ?: createKronScheduler(
+        secondsParsed, minutesParsed, hoursParsed, dayOfMonthParsed, monthParsed, yearParsed, dayOfWeekParsed
     )
 }
 
+fun createSimpleScheduler(
+    incoming: KrontabTemplate,
+    defaultOffset: Minutes
+): KronSchedulerTz {
+    val scheduler = createSimpleScheduler(incoming)
+    return if (scheduler is KronSchedulerTz) {
+        scheduler
+    } else {
+        CronDateTimeSchedulerTz(
+            (scheduler as CronDateTimeScheduler).cronDateTime,
+            TimezoneOffset(defaultOffset.minutes)
+        )
+    }
+}
+
 /**
  * Shortcut for [createSimpleScheduler]
  */
 fun buildSchedule(incoming: KrontabTemplate): KronScheduler = createSimpleScheduler(incoming)
+/**
+ * Shortcut for [createSimpleScheduler]
+ */
+fun buildSchedule(incoming: KrontabTemplate, defaultOffset: Minutes): KronSchedulerTz = createSimpleScheduler(incoming, defaultOffset)
 
 /**
  * Shortcut for [buildSchedule]
  */
 fun KrontabTemplate.toSchedule(): KronScheduler = buildSchedule(this)
+/**
+ * Shortcut for [buildSchedule]
+ */
+fun KrontabTemplate.toSchedule(defaultOffset: Minutes): KronSchedulerTz = buildSchedule(this, defaultOffset)
 
 /**
  * Shortcut for [buildSchedule]
  */
-fun KrontabTemplate.toKronScheduler(): KronScheduler = buildSchedule(this)
+fun KrontabTemplate.toKronScheduler(): KronScheduler = buildSchedule(this)
+/**
+ * Shortcut for [buildSchedule]
+ */
+fun KrontabTemplate.toKronScheduler(defaultOffset: Minutes): KronSchedulerTz = buildSchedule(this, defaultOffset)

src/commonMain/kotlin/dev/inmo/krontab/builder/SchedulerBuilder.kt

@@ -1,7 +1,12 @@
 package dev.inmo.krontab.builder
 
+import com.soywiz.klock.TimezoneOffset
+import com.soywiz.klock.minutes
 import dev.inmo.krontab.KronScheduler
+import dev.inmo.krontab.KronSchedulerTz
 import dev.inmo.krontab.internal.createKronScheduler
+import dev.inmo.krontab.internal.createKronSchedulerWithOffset
+import dev.inmo.krontab.utils.Minutes
 
 /**
  * Will help to create an instance of [KronScheduler]
@@ -16,13 +21,31 @@ fun buildSchedule(settingsBlock: SchedulerBuilder.() -> Unit): KronScheduler {
     return builder.build()
 }
 
+/**
+ * Will help to create an instance of [KronScheduler]
+ *
+ * @see dev.inmo.krontab.createSimpleScheduler
+ */
+fun buildSchedule(
+    offset: Minutes,
+    settingsBlock: SchedulerBuilder.() -> Unit
+): KronSchedulerTz {
+    val builder = SchedulerBuilder(offset = offset)
+
+    builder.settingsBlock()
+
+    return builder.build() as KronSchedulerTz
+}
+
 class SchedulerBuilder(
     private var seconds: Array<Byte>? = null,
     private var minutes: Array<Byte>? = null,
     private var hours: Array<Byte>? = null,
     private var dayOfMonth: Array<Byte>? = null,
     private var month: Array<Byte>? = null,
-    private var year: Array<Int>? = null
+    private var year: Array<Int>? = null,
+    private var dayOfWeek: Array<Byte>? = null,
+    private val offset: Minutes? = null
 ) {
     private fun <I, T : TimeBuilder<I>> callAndReturn(
         initial: Array<I>?,
@@ -84,6 +107,17 @@ class SchedulerBuilder(
         ) ?.toTypedArray()
     }
 
+    /**
+     * Starts an hours block
+     */
+    fun dayOfWeek(block: WeekDaysBuilder.() -> Unit) {
+        dayOfWeek = callAndReturn(
+            dayOfWeek,
+            WeekDaysBuilder(),
+            block
+        ) ?.toTypedArray()
+    }
+
     /**
      * Starts an months block
      */
@@ -112,5 +146,7 @@ class SchedulerBuilder(
      * @see dev.inmo.krontab.createSimpleScheduler
      * @see dev.inmo.krontab.internal.createKronScheduler
      */
-    fun build(): KronScheduler = createKronScheduler(seconds, minutes, hours, dayOfMonth, month, year)
+    fun build(): KronScheduler = offset ?.let {
+        createKronSchedulerWithOffset(seconds, minutes, hours, dayOfMonth, month, year, dayOfWeek, TimezoneOffset(it.minutes))
+    } ?: createKronScheduler(seconds, minutes, hours, dayOfMonth, month, year, dayOfWeek)
 }

src/commonMain/kotlin/dev/inmo/krontab/builder/TimeBuilder.kt

@@ -1,11 +1,10 @@
 package dev.inmo.krontab.builder
 
 import dev.inmo.krontab.internal.*
-import dev.inmo.krontab.utils.clamp
 
 /**
  * This class was created for incapsulation of builder work with specified [restrictionsRange]. For example,
- * [include] function of [TimeBuilder] will always [clamp] incoming data using its [restrictionsRange]
+ * [include] function of [TimeBuilder] will always [coerceIn] incoming data using its [restrictionsRange]
  */
 sealed class TimeBuilder<T : Number> (
     private val restrictionsRange: IntRange,
@@ -37,7 +36,7 @@ sealed class TimeBuilder<T : Number> (
      */
     @Suppress("MemberVisibilityCanBePrivate")
     infix fun include(array: Array<Int>) {
-        val clamped = array.map { it.clamp(restrictionsRange) } + (result ?: emptySet())
+        val clamped = array.map { it.coerceIn(restrictionsRange) } + (result ?: emptySet())
         result = clamped.toSet()
     }
 
@@ -46,7 +45,7 @@ sealed class TimeBuilder<T : Number> (
      */
     @Suppress("unused")
     infix fun at(value: Int) {
-        result = (result ?: emptySet()) + value.clamp(restrictionsRange)
+        result = (result ?: emptySet()) + value.coerceIn(restrictionsRange)
     }
 
 
@@ -70,7 +69,7 @@ sealed class TimeBuilder<T : Number> (
      * @see [from]
      */
     infix fun Int.every(delay: Int): Array<Int> {
-        val progression = clamp(restrictionsRange) .. restrictionsRange.last step delay
+        val progression = coerceIn(restrictionsRange) .. restrictionsRange.last step delay
         val result = progression.toSet().toTypedArray()
 
         this@TimeBuilder include result
@@ -88,7 +87,7 @@ sealed class TimeBuilder<T : Number> (
      */
     @Suppress("MemberVisibilityCanBePrivate")
     infix fun Int.upTo(endIncluding: Int): Array<Int> {
-        val progression = clamp(restrictionsRange) .. endIncluding.clamp(restrictionsRange)
+        val progression = coerceIn(restrictionsRange) .. endIncluding.coerceIn(restrictionsRange)
         val result = progression.toSet().toTypedArray()
 
         this@TimeBuilder include result
@@ -129,3 +128,4 @@ class HoursBuilder : TimeBuilder<Byte>(hoursRange, intToByteConverter)
 class DaysOfMonthBuilder : TimeBuilder<Byte>(dayOfMonthRange, intToByteConverter)
 class MonthsBuilder : TimeBuilder<Byte>(monthRange, intToByteConverter)
 class YearsBuilder : TimeBuilder<Int>(yearRange, intToIntConverter)
+class WeekDaysBuilder : TimeBuilder<Byte>(dayOfWeekRange, intToByteConverter)

src/commonMain/kotlin/dev/inmo/krontab/collection/CollectionKronScheduler.kt

@@ -1,17 +1,16 @@
 package dev.inmo.krontab.collection
 
 import com.soywiz.klock.DateTime
+import com.soywiz.klock.DateTimeTz
 import dev.inmo.krontab.*
 import dev.inmo.krontab.internal.*
-import dev.inmo.krontab.internal.CronDateTimeScheduler
-import dev.inmo.krontab.internal.toNearDateTime
 
 /**
  * This scheduler will be useful in case you want to unite several different [KronScheduler]s
  */
 data class CollectionKronScheduler internal constructor(
     internal val schedulers: MutableList<KronScheduler>
-) : KronScheduler {
+) : KronSchedulerTz {
     internal constructor() : this(mutableListOf())
 
     /**
@@ -38,6 +37,18 @@ data class CollectionKronScheduler internal constructor(
                     mergeCronDateTimeSchedulers(resultCronDateTimes)
                 )
             }
+            is CronDateTimeSchedulerTz -> {
+                val newCronDateTimes = mutableListOf(kronScheduler.cronDateTime)
+                schedulers.removeAll {
+                    if (it is CronDateTimeSchedulerTz && it.offset == kronScheduler.offset) {
+                        newCronDateTimes.add(it.cronDateTime)
+                        true
+                    } else {
+                        false
+                    }
+                }
+                schedulers.add(CronDateTimeSchedulerTz(newCronDateTimes.merge(), kronScheduler.offset))
+            }
             is CollectionKronScheduler -> kronScheduler.schedulers.forEach {
                 include(it)
             }
@@ -48,4 +59,8 @@ data class CollectionKronScheduler internal constructor(
     override suspend fun next(relatively: DateTime): DateTime {
         return schedulers.mapNotNull { it.next(relatively) }.minOrNull() ?: getAnyNext(relatively)
     }
+
+    override suspend fun next(relatively: DateTimeTz): DateTimeTz {
+        return schedulers.mapNotNull { it.next(relatively) }.minOrNull() ?: getAnyNext(relatively.local).toOffsetUnadjusted(relatively.offset)
+    }
 }

src/commonMain/kotlin/dev/inmo/krontab/internal/CronDateTime.kt

@@ -1,80 +1,73 @@
 package dev.inmo.krontab.internal
 
 import com.soywiz.klock.DateTime
-import com.soywiz.klock.DateTimeSpan
+import com.soywiz.klock.TimezoneOffset
 import dev.inmo.krontab.KronScheduler
 
 /**
- * @param month 0-11
- * @param dayOfMonth 0-31
+ * @param daysOfWeek 0-6
+ * @param years any int
+ * @param months 0-11
+ * @param daysOfMonth 0-31
  * @param hours 0-23
  * @param minutes 0-59
  * @param seconds 0-59
  */
 internal data class CronDateTime(
-    val year: Int? = null,
-    val month: Byte? = null,
-    val dayOfMonth: Byte? = null,
-    val hours: Byte? = null,
-    val minutes: Byte? = null,
-    val seconds: Byte? = null
+    val daysOfWeek: Array<Byte>? = null,
+    val years: Array<Int>? = null,
+    val months: Array<Byte>? = null,
+    val daysOfMonth: Array<Byte>? = null,
+    val hours: Array<Byte>? = null,
+    val minutes: Array<Byte>? = null,
+    val seconds: Array<Byte>? = null
 ) {
     init {
-        check(year ?.let { it in yearRange } ?: true)
-        check(month ?.let { it in monthRange } ?: true)
-        check(dayOfMonth ?.let { it in dayOfMonthRange } ?: true)
-        check(hours?.let { it in hoursRange } ?: true)
-        check(minutes?.let { it in minutesRange } ?: true)
-        check(seconds?.let { it in secondsRange } ?: true)
+        check(daysOfWeek ?.all { it in dayOfWeekRange } ?: true)
+        check(years?.all { it in yearRange } ?: true)
+        check(months?.all { it in monthRange } ?: true)
+        check(daysOfMonth ?.all { it in dayOfMonthRange } ?: true)
+        check(hours?.all { it in hoursRange } ?: true)
+        check(minutes?.all { it in minutesRange } ?: true)
+        check(seconds?.all { it in secondsRange } ?: true)
     }
 
-    internal val klockDayOfMonth = dayOfMonth ?.plus(1)
+    internal val calculators = listOf(
+        years ?.let { NearDateTimeCalculatorYears(it) },
+        daysOfWeek ?.let { NearDateTimeCalculatorWeekDays(it) },
+        NearDateTimeCalculatorMillis(arrayOf(0)),
+        seconds ?.let { NearDateTimeCalculatorSeconds(it) },
+        minutes ?.let { NearDateTimeCalculatorMinutes(it) },
+        hours ?.let { NearDateTimeCalculatorHours(it) },
+        daysOfMonth ?.let { NearDateTimeCalculatorDays(it) },
+        months ?.let { NearDateTimeCalculatorMonths(it) },
+    )
+
+    internal fun toNearDateTime(relativelyTo: DateTime = DateTime.now()): DateTime? {
+        var current = relativelyTo
+        whileLoop@while (true) {
+            for (calculator in calculators) {
+                val (calculated, requireRecalculation) = (calculator ?: continue).calculateNearTime(current) ?: return null
+                current = calculated
+                if (requireRecalculation) {
+                    continue@whileLoop
+                }
+            }
+            return current
+        }
+    }
 }
 
-/**
- * @return The near [DateTime] which happens after [relativelyTo] or will be equal to [relativelyTo]
- */
-internal fun CronDateTime.toNearDateTime(relativelyTo: DateTime = DateTime.now()): DateTime? {
-    var current = relativelyTo
-
-    seconds?.let {
-        val left = it - current.seconds
-        current += DateTimeSpan(minutes = if (left <= 0) 1 else 0, seconds = left)
-    }
-
-    minutes?.let {
-        val left = it - current.minutes
-        current += DateTimeSpan(hours = if (left < 0) 1 else 0, minutes = left)
-    }
-
-    hours?.let {
-        val left = it - current.hours
-        current += DateTimeSpan(days = if (left < 0) 1 else 0, hours = left)
-    }
-
-    klockDayOfMonth ?.let {
-        val left = (it - current.dayOfMonth).let { diff ->
-            if (diff > 0 && current.endOfMonth.run { it > dayOfMonth && current.dayOfMonth == dayOfMonth }) {
-                0
-            } else {
-                diff
-            }
-        }
-        current += DateTimeSpan(months = if (left < 0) 1 else 0, days = left)
-    }
-
-    month ?.let {
-        val left = it - current.month0
-        current += DateTimeSpan(years = if (left < 0) 1 else 0, months = left)
-    }
-
-    year ?.let {
-        if (current.yearInt != it) {
-            return null
-        }
-    }
-
-    return current
+internal fun createCronDateTime(
+    seconds: Array<Byte>? = null,
+    minutes: Array<Byte>? = null,
+    hours: Array<Byte>? = null,
+    dayOfMonth: Array<Byte>? = null,
+    month: Array<Byte>? = null,
+    years: Array<Int>? = null,
+    weekDays: Array<Byte>? = null
+): CronDateTime {
+    return CronDateTime(weekDays, years, month, dayOfMonth, hours, minutes, seconds)
 }
 
 /**
@@ -86,33 +79,29 @@ internal fun createKronScheduler(
     hours: Array<Byte>? = null,
     dayOfMonth: Array<Byte>? = null,
     month: Array<Byte>? = null,
-    years: Array<Int>? = null
-): KronScheduler {
-    val resultCronDateTimes = mutableListOf(CronDateTime())
+    years: Array<Int>? = null,
+    weekDays: Array<Byte>? = null
+): KronScheduler = CronDateTimeScheduler(createCronDateTime(seconds, minutes, hours, dayOfMonth, month, years, weekDays))
+/**
+ * @return [KronScheduler] (in fact [CronDateTimeScheduler]) based on incoming data
+ */
+internal fun createKronSchedulerWithOffset(
+    seconds: Array<Byte>? = null,
+    minutes: Array<Byte>? = null,
+    hours: Array<Byte>? = null,
+    dayOfMonth: Array<Byte>? = null,
+    month: Array<Byte>? = null,
+    years: Array<Int>? = null,
+    weekDays: Array<Byte>? = null,
+    offset: TimezoneOffset
+): KronScheduler = CronDateTimeSchedulerTz(createCronDateTime(seconds, minutes, hours, dayOfMonth, month, years, weekDays), offset)
 
-    seconds ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(seconds = currentTime)
-    }
-
-    minutes ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(minutes = currentTime)
-    }
-
-    hours ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(hours = currentTime)
-    }
-
-    dayOfMonth ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(dayOfMonth = currentTime)
-    }
-
-    month ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(month = currentTime)
-    }
-
-    years ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Int ->
-        previousCronDateTime.copy(year = currentTime)
-    }
-
-    return CronDateTimeScheduler(resultCronDateTimes.toList())
-}
+internal fun List<CronDateTime>.merge() = CronDateTime(
+    flatMap { it.daysOfWeek ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.years ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.months ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.daysOfMonth ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.hours ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.minutes ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+    flatMap { it.seconds ?.toList() ?: emptyList() }.distinct().toTypedArray().takeIf { it.isNotEmpty() },
+)

src/commonMain/kotlin/dev/inmo/krontab/internal/CronDateTimeScheduler.kt

@@ -1,8 +1,7 @@
 package dev.inmo.krontab.internal
 
 import com.soywiz.klock.DateTime
-import dev.inmo.krontab.*
-import dev.inmo.krontab.collection.plus
+import dev.inmo.krontab.KronScheduler
 
 /**
  * Cron-oriented realisation of [KronScheduler]
@@ -19,38 +18,20 @@ import dev.inmo.krontab.collection.plus
  * @see dev.inmo.krontab.builder.SchedulerBuilder
  */
 internal data class CronDateTimeScheduler internal constructor(
-    internal val cronDateTimes: List<CronDateTime>
+    internal val cronDateTime: CronDateTime
 ) : KronScheduler {
     /**
      * @return Near date using [cronDateTimes] list and getting the [Iterable.minByOrNull] one
      *
      * @see toNearDateTime
      */
-    override suspend fun next(relatively: DateTime): DateTime {
-        return cronDateTimes.mapNotNull { it.toNearDateTime(relatively) }.minOrNull() ?: getAnyNext(relatively)
+    override suspend fun next(relatively: DateTime): DateTime? {
+        return cronDateTime.toNearDateTime(relatively)
     }
 }
 
-internal fun mergeCronDateTimeSchedulers(schedulers: List<CronDateTimeScheduler>) = CronDateTimeScheduler(
-    schedulers.flatMap { it.cronDateTimes }
+internal fun mergeCronDateTimeSchedulers(
+    schedulers: List<CronDateTimeScheduler>
+): CronDateTimeScheduler = CronDateTimeScheduler(
+    schedulers.map { it.cronDateTime }.merge()
 )
-
-/**
- * @return New instance of [CronDateTimeScheduler] with all unique [CronDateTimeScheduler.cronDateTimes] of
- * [kronSchedulers] included
- */
-@Deprecated("Will be removed in next major release", ReplaceWith("merge", "dev.inmo.krontab"))
-fun merge(kronSchedulers: List<KronScheduler>) = kronSchedulers.apply { dev.inmo.krontab.merge() }
-
-/**
- * @return Vararg shortcut for [dev.inmo.krontab.merge]
- */
-@Suppress("NOTHING_TO_INLINE")
-@Deprecated("Will be removed in next major release", ReplaceWith("merge", "dev.inmo.krontab"))
-inline fun merge(vararg kronDateTimeSchedulers: KronScheduler) = kronDateTimeSchedulers.apply { dev.inmo.krontab.merge() }
-/**
- * @return Vararg shortcut for [dev.inmo.krontab.merge]
- */
-@Suppress("NOTHING_TO_INLINE")
-@Deprecated("Will be removed in next major release", ReplaceWith("merge", "dev.inmo.krontab"))
-inline fun KronScheduler.plus(other: KronScheduler) = this + other

src/commonMain/kotlin/dev/inmo/krontab/internal/CronDateTimeSchedulerTz.kt

@@ -0,0 +1,32 @@
+package dev.inmo.krontab.internal
+
+import com.soywiz.klock.DateTimeTz
+import com.soywiz.klock.TimezoneOffset
+import dev.inmo.krontab.KronScheduler
+import dev.inmo.krontab.KronSchedulerTz
+
+/**
+ * Cron-oriented realisation of [KronScheduler] with taking into account [offset] for list of [cronDateTimes]
+ *
+ * @see CronDateTime
+ */
+internal data class CronDateTimeSchedulerTz internal constructor(
+    internal val cronDateTime: CronDateTime,
+    internal val offset: TimezoneOffset
+) : KronSchedulerTz {
+    override suspend fun next(relatively: DateTimeTz): DateTimeTz? {
+        val dateTimeWithActualOffset = relatively.toOffset(offset).local
+        return cronDateTime.toNearDateTime(dateTimeWithActualOffset) ?.toOffsetUnadjusted(offset) ?.toOffset(relatively.offset)
+    }
+}
+
+internal fun mergeCronDateTimeSchedulers(
+    schedulers: List<CronDateTimeSchedulerTz>
+) = schedulers.groupBy {
+    it.offset
+}.map { (offset, schedulers) ->
+    CronDateTimeSchedulerTz(
+        schedulers.map { it.cronDateTime }.merge(),
+        offset
+    )
+}

src/commonMain/kotlin/dev/inmo/krontab/internal/NearDateTimeCalculator.kt

@@ -0,0 +1,183 @@
+package dev.inmo.krontab.internal
+
+import com.soywiz.klock.*
+import dev.inmo.krontab.utils.copy
+import kotlin.math.min
+
+fun interface NearDateTimeCalculator {
+    /**
+     * @return pair of near [DateTime] for this checker and [Boolean] flag that all previous calculations must be
+     * recalculated
+     */
+    fun calculateNearTime(
+        relativelyTo: DateTime
+    ): Pair<DateTime, Boolean>?
+}
+
+internal class CommonNearDateTimeCalculator<T>(
+    private val times: Array<T>,
+    private val partGetter: (DateTime) -> T,
+    private val partSetter: (DateTime, T) -> DateTime?
+) : NearDateTimeCalculator where T : Comparable<T>, T : Number {
+    /**
+     * @return pair of near [DateTime] for this checker and [Boolean] flag that all previous calculations must be
+     * recalculated
+     */
+    override fun calculateNearTime(
+        relativelyTo: DateTime
+    ): Pair<DateTime, Boolean>? {
+        val currentData = partGetter(relativelyTo)
+        val greaterOrEquals = times.firstOrNull { it >= currentData }
+        val newDateTime = when (greaterOrEquals) {
+            null -> partSetter(relativelyTo, times.first()) ?: return null
+            currentData -> relativelyTo
+            else -> partSetter(relativelyTo, greaterOrEquals) ?: return null
+        }
+        return if (newDateTime == relativelyTo) {
+            relativelyTo to false
+        } else {
+            newDateTime to true
+        }
+    }
+}
+
+internal fun NearDateTimeCalculatorMillis(
+    times: Array<Short>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.milliseconds.toShort() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.milliseconds) {
+            dateTime.plus(1.seconds)
+        } else {
+            dateTime
+        }).copy(milliseconds = newOne.toInt())
+    }
+)
+
+internal fun NearDateTimeCalculatorSeconds(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.seconds.toByte() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.seconds) {
+            dateTime.plus(1.minutes)
+        } else {
+            dateTime
+        }).copy(second = newOne.toInt(), milliseconds = 0)
+    }
+)
+
+internal fun NearDateTimeCalculatorMinutes(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.minutes.toByte() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.minutes) {
+            dateTime.plus(1.hours)
+        } else {
+            dateTime
+        }).copy(minute = newOne.toInt(), second = 0, milliseconds = 0)
+    }
+)
+
+internal fun NearDateTimeCalculatorHours(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.hours.toByte() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.hours) {
+            dateTime.plus(1.days)
+        } else {
+            dateTime
+        }).copy(hour = newOne.toInt(), minute = 0, second = 0, milliseconds = 0)
+    }
+)
+
+internal fun NearDateTimeCalculatorDays(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.dayOfMonth.toByte() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.dayOfMonth) {
+            dateTime.plus(1.months)
+        } else {
+            dateTime
+        }).copy(
+            dayOfMonth = min(dateTime.month.days(dateTime.year), newOne.toInt() + 1), // index1
+            hour = 0,
+            minute = 0,
+            second = 0,
+            milliseconds = 0
+        )
+    }
+)
+
+internal fun NearDateTimeCalculatorMonths(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.dayOfMonth.toByte() },
+    { dateTime, newOne ->
+        (if (newOne < dateTime.month0) {
+            dateTime.plus(1.years)
+        } else {
+            dateTime
+        }).copy(
+            month = newOne.toInt() + 1, // index1
+            dayOfMonth = 1, // index1
+            hour = 0,
+            minute = 0,
+            second = 0,
+            milliseconds = 0
+        )
+    }
+)
+
+internal fun NearDateTimeCalculatorWeekDays(
+    times: Array<Byte>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.dayOfWeek.index0.toByte() },
+    { dateTime, newOne ->
+        val currentDayOfWeek = dateTime.dayOfWeek.index0
+        if (newOne.toInt() == currentDayOfWeek) return@CommonNearDateTimeCalculator dateTime
+        (if (newOne < currentDayOfWeek) {
+            dateTime.plus(7.days - (currentDayOfWeek - newOne).days)
+        } else {
+            dateTime.plus(newOne.toInt().days - currentDayOfWeek.days)
+        }).copy(
+            hour = 0,
+            minute = 0,
+            second = 0,
+            milliseconds = 0
+        )
+    }
+)
+
+internal fun NearDateTimeCalculatorYears(
+    times: Array<Int>
+) = CommonNearDateTimeCalculator(
+    times,
+    { it.yearInt },
+    { dateTime, newOne ->
+        val currentYear = dateTime.yearInt
+        if (newOne == currentYear) return@CommonNearDateTimeCalculator dateTime
+        (if (newOne < currentYear) {
+            null
+        } else {
+            dateTime.plus(newOne.years - currentYear.years)
+        }) ?.copy(
+            month = 1, // index1
+            dayOfMonth = 1, // index1
+            hour = 0,
+            minute = 0,
+            second = 0,
+            milliseconds = 0
+        )
+    }
+)

src/commonMain/kotlin/dev/inmo/krontab/internal/Parser.kt

@@ -1,7 +1,5 @@
 package dev.inmo.krontab.internal
 
-import dev.inmo.krontab.utils.clamp
-
 typealias Converter<T> = (Int) -> T
 
 internal val intToByteConverter: Converter<Byte> = { it: Int -> it.toByte() }
@@ -10,7 +8,7 @@ private fun <T> createSimpleScheduler(from: String, dataRange: IntRange, dataCon
     val things = from.split(",")
 
     val results = things.flatMap {
-        val currentToken = it.toLowerCase().replace(
+        val currentToken = it.lowercase().replace(
             "f", dataRange.first.toString()
         ).replace(
             "l", dataRange.last.toString()
@@ -18,7 +16,7 @@ private fun <T> createSimpleScheduler(from: String, dataRange: IntRange, dataCon
         when {
             currentToken.contains("-") -> {
                 val splitted = currentToken.split("-")
-                (splitted.first().toInt().clamp(dataRange) .. splitted[1].toInt().clamp(dataRange)).toList()
+                (splitted.first().toInt().coerceIn(dataRange) .. splitted[1].toInt().coerceIn(dataRange)).toList()
             }
             currentToken.contains("/") -> {
                 val (start, step) = currentToken.split("/")
@@ -26,18 +24,20 @@ private fun <T> createSimpleScheduler(from: String, dataRange: IntRange, dataCon
                     0
                 } else {
                     start.toInt()
-                }).clamp(dataRange)
-                val stepNum = step.toInt().clamp(dataRange)
+                }).coerceIn(dataRange)
+                val stepNum = step.toInt().coerceIn(dataRange)
                 (startNum .. dataRange.last step stepNum).map { it }
             }
             currentToken == "*" -> return null
-            else -> listOf(currentToken.toInt().clamp(dataRange))
+            else -> listOf(currentToken.toInt().coerceIn(dataRange))
         }
     }
 
     return results.map(dataConverter)
 }
 
+internal fun parseWeekDay(from: String?) = from ?.let { if (it.endsWith("w")) createSimpleScheduler(it.removeSuffix("w"), dayOfWeekRange, intToByteConverter) ?.toTypedArray() else null }
+internal fun parseOffset(from: String?) = from ?.let { if (it.endsWith("o")) it.removeSuffix("o").toIntOrNull() else null }
 internal fun parseYears(from: String?) = from ?.let { createSimpleScheduler(from, yearRange, intToIntConverter) ?.toTypedArray() }
 internal fun parseMonths(from: String) = createSimpleScheduler(from, monthRange, intToByteConverter) ?.toTypedArray()
 internal fun parseDaysOfMonth(from: String) = createSimpleScheduler(from, dayOfMonthRange, intToByteConverter) ?.toTypedArray()
@@ -60,3 +60,16 @@ internal fun <T> Array<T>.fillWith(
     }
 }
 
+internal fun <T> T.fillWith(
+    whereToPut: MutableList<CronDateTime>,
+    createFactory: (CronDateTime, T) -> CronDateTime
+) {
+    val previousValues = whereToPut.toList()
+
+    whereToPut.clear()
+
+    previousValues.forEach { previousValue ->
+        whereToPut.add(createFactory(previousValue, this))
+    }
+}
+

src/commonMain/kotlin/dev/inmo/krontab/internal/Ranges.kt

@@ -1,5 +1,6 @@
 package dev.inmo.krontab.internal
 
+internal val dayOfWeekRange = 0 .. 6
 internal val yearRange = Int.MIN_VALUE .. Int.MAX_VALUE
 internal val monthRange = 0 .. 11
 internal val dayOfMonthRange = 0 .. 30

src/commonMain/kotlin/dev/inmo/krontab/utils/Data.kt

@@ -1,12 +0,0 @@
-package dev.inmo.krontab.utils
-
-/**
- * @return [min] in case if [this] less than [min]. Otherwise will check that [max] grant than [this] and return [this]
- * if so or [max] otherwise
- */
-internal fun Int.clamp(min: Int, max: Int): Int = if (this < min) min else if (this > max) max else this
-
-/**
- * Wrapper function for [clamp] extension
- */
-internal fun Int.clamp(range: IntRange): Int = clamp(range.first, range.last)

src/commonMain/kotlin/dev/inmo/krontab/utils/DateTimeCopy.kt

@@ -0,0 +1,23 @@
+package dev.inmo.krontab.utils
+
+import com.soywiz.klock.DateTime
+import com.soywiz.klock.Month
+import kotlin.math.min
+
+fun DateTime.copy(
+    year: Int = yearInt,
+    month: Int = month1,
+    dayOfMonth: Int = this.dayOfMonth,
+    hour: Int = hours,
+    minute: Int = minutes,
+    second: Int = seconds,
+    milliseconds: Int = this.milliseconds
+) = DateTime(
+    year,
+    month,
+    min(Month(month).days(yearInt), dayOfMonth),
+    hour,
+    minute,
+    second,
+    milliseconds
+)

src/commonMain/kotlin/dev/inmo/krontab/utils/SchedulerFlow.kt

@@ -1,26 +1,35 @@
 package dev.inmo.krontab.utils
 
 import com.soywiz.klock.DateTime
-import dev.inmo.krontab.KronScheduler
+import com.soywiz.klock.DateTimeTz
+import dev.inmo.krontab.*
 import kotlinx.coroutines.FlowPreview
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.channelFlow
 
+/**
+ * This [Flow] will trigger emitting each near time which will be returned from [this] [KronScheduler] with attention to
+ * time zones
+ *
+ * @see channelFlow
+ * @see KronSchedulerTz.doInfinityTz
+ */
 @FlowPreview
-fun KronScheduler.asFlow(): Flow<DateTime> = SchedulerFlow(this)
-
-@FlowPreview
-class SchedulerFlow(
-    private val scheduler: KronScheduler
-) : AbstractFlow<DateTime>() {
-    @FlowPreview
-    override suspend fun collectSafely(collector: FlowCollector<DateTime>) {
-        while (true) {
-            val now = DateTime.now()
-            val nextTime = scheduler.next(now) ?: break
-            val sleepDelay = (nextTime - now).millisecondsLong
-            delay(sleepDelay)
-            collector.emit(nextTime)
-        }
+fun KronScheduler.asTzFlow(): Flow<DateTimeTz> = channelFlow {
+    doInfinityTz {
+        send(it)
     }
-}
+}
+
+/**
+ * This method is a map for [asTzFlow] and will works the same but return flow with [DateTime]s
+ *
+ * @see channelFlow
+ * @see KronScheduler.doInfinityLocal
+ */
+@FlowPreview
+fun KronScheduler.asFlow(): Flow<DateTime> = channelFlow {
+    doInfinityLocal {
+        send(it)
+    }
+}

src/commonMain/kotlin/dev/inmo/krontab/utils/Typealiases.kt

@@ -0,0 +1,3 @@
+package dev.inmo.krontab.utils
+
+typealias Minutes = Int

src/commonTest/kotlin/dev/inmo/krontab/utils/StringParseTest.kt

@@ -1,5 +1,7 @@
 package dev.inmo.krontab.utils
 
+import com.soywiz.klock.*
+import dev.inmo.krontab.KronSchedulerTz
 import dev.inmo.krontab.buildSchedule
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.collect
@@ -65,8 +67,8 @@ class StringParseTest {
         val flow = kronScheduler.asFlow()
 
         runTest {
-            val ranges = rangesEnds.map { it.first .. it.second }.flatten().toMutableList()
-            val expectedCollects = rangesEnds.sumBy { it.second - it.first + 1 }
+            val ranges = rangesEnds.map { it.first .. it.second }.flatten().distinct().toMutableList()
+            val expectedCollects = ranges.size
             var collected = 0
 
             flow.takeWhile { ranges.isNotEmpty() }.collect {
@@ -76,4 +78,19 @@ class StringParseTest {
             assertEquals(expectedCollects, collected)
         }
     }
+    @Test
+    fun testThatTimezoneCorrectlyDeserialized() {
+        val now = DateTime.now().copy(milliseconds = 0).local
+
+        runTest {
+            for (i in 0 .. 1339) {
+                val expectedInCurrentOffset = now.toOffset(TimezoneOffset(i.minutes)) + 1.hours
+                val kronScheduler = buildSchedule(
+                    "${expectedInCurrentOffset.seconds} ${expectedInCurrentOffset.minutes} ${expectedInCurrentOffset.hours} * * ${i}o"
+                ) as KronSchedulerTz
+                val next = kronScheduler.next(now)
+                assertEquals(expectedInCurrentOffset.toOffset(now.offset), next)
+            }
+        }
+    }
 }

src/commonTest/kotlin/dev/inmo/krontab/utils/TimeZoneTest.kt

@@ -0,0 +1,28 @@
+package dev.inmo.krontab.utils
+
+import com.soywiz.klock.*
+import dev.inmo.krontab.builder.buildSchedule
+import dev.inmo.krontab.next
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class TimeZoneTest {
+    @Test
+    fun testDifferentTimeZonesReturnsDifferentTimes() {
+        val scheduler = buildSchedule { seconds { every(1) } }
+        val additionalMilliseconds = 100.milliseconds
+        val baseDate = DateTime.now().startOfWeek.copy(milliseconds = additionalMilliseconds.millisecondsInt)
+        runTest {
+            for (i in 0 until 7) {
+                val now = baseDate + i.days
+                for (j in 0 .. 24) {
+                    val nowTz = now.toOffset(j.hours)
+                    val next = scheduler.next(nowTz)!!
+                    assertEquals(
+                        (nowTz + 1.seconds - additionalMilliseconds).utc.unixMillisLong, next.utc.unixMillisLong
+                    )
+                }
+            }
+        }
+    }
+}

src/commonTest/kotlin/dev/inmo/krontab/utils/WeekDaysTest.kt

@@ -0,0 +1,38 @@
+package dev.inmo.krontab.utils
+
+import com.soywiz.klock.*
+import dev.inmo.krontab.builder.buildSchedule
+import kotlin.math.ceil
+import kotlin.test.*
+
+class WeekDaysTest {
+    @Test
+    fun testThatWeekDaysSchedulingWorks() {
+        val startDateTime = DateTime.now().startOfDay
+        val weekDay = startDateTime.dayOfWeek.index0
+        val testDays = 400
+        val scheduler = buildSchedule {
+            dayOfWeek {
+                at(weekDay)
+            }
+            years {
+                at(startDateTime.yearInt)
+            }
+        }
+        runTest {
+            for (day in 0 until testDays) {
+                val currentDateTime = startDateTime + day.days
+                val next = scheduler.next(currentDateTime)
+                val expected = when {
+                    day % 7 == 0 -> currentDateTime
+                    else -> startDateTime + ceil(day.toFloat() / 7).weeks
+                }
+                if (expected.yearInt != startDateTime.yearInt) {
+                    assertNull(next)
+                } else {
+                    assertEquals(expected, next)
+                }
+            }
+        }
+    }
+}