Merge pull request #1 from InsanusMokrassar/0.2.3

0.2.3

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+patreon: InsanusMokrassar
+
+custom: ['https://paypal.me/InsanusMokrassar?locale.x=ru_RU']

.github/labeler.yml

@@ -0,0 +1,3 @@
+code: "**/*.kt"
+gradle: "**/*.gradle"
+markdown: "**/*.md"

.github/workflows/greetings.yml

@@ -0,0 +1,13 @@
+name: Greetings
+
+on: [pull_request, issues]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/first-interaction@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        issue-message: 'Welcome with your first issue'
+        pr-message: 'Welcome with your first Pull Request'

.github/workflows/label.yml

@@ -0,0 +1,18 @@
+# This workflow will triage pull requests and apply a label based on the
+# paths that are modified in the pull request.
+#
+# To use this workflow, you will need to set up a .github/labeler.yml
+# file with configuration.  For more information, see:
+# https://github.com/actions/labeler/blob/master/README.md
+
+name: "Pull Request Labeler"
+on:
+  - pull_request
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v2
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"

CHANGELOG.md

@@ -7,6 +7,18 @@
     * Coroutines `1.3.2` -> `1.3.3`
     * Klock `1.7.3` -> `1.8.6`
 
+### 0.2.3
+
+* Updates in libraries:
+    * Kotlin `1.3.70` -> `1.3.72`
+    * Coroutines `1.3.5` -> `1.3.7`
+    * Klock `1.10.0` -> `1.11.3`
+* A lot of KDocs added and fixed
+* `EverySecondScheduler` changed its building logic - now it is lazy with builder using
+* `KronScheduler#doOnce` was optimized: now it will be explicitly called once and return result of its calculations
+    * `KronScheduler#doWhile` was rewritten to use `KronScheduler#doOnce` for calculations of `block` result
+* New `buildSchedule(String)` function as a shortcut for `createSimpleScheduler(String)`
+
 ### 0.2.2
 
 * Updates in libraries:

build.gradle

@@ -15,9 +15,10 @@ buildscript {
 plugins {
     id "org.jetbrains.kotlin.multiplatform" version "$kotlin_version"
     id "org.jetbrains.kotlin.plugin.serialization" version "$kotlin_version"
+    id "org.jetbrains.dokka" version "$dokka_version"
 }
 
-project.version = "0.2.2"
+project.version = "0.2.3"
 project.group = "com.insanusmokrassar"
 
 apply from: "publish.gradle"
@@ -29,6 +30,8 @@ repositories {
     maven { url "https://kotlin.bintray.com/kotlinx" }
 }
 
+apply from: './dokka.gradle'
+
 kotlin {
     jvm()
     js()

dokka.gradle

@@ -0,0 +1,42 @@
+dokka {
+    outputFormat = 'html'
+
+    switch (true) {
+        case project.hasProperty("DOKKA_PATH"):
+            outputDirectory = project.property("DOKKA_PATH").toString()
+            break
+        case System.getenv("DOKKA_PATH") != null:
+            outputDirectory = System.getenv("DOKKA_PATH")
+            break
+    }
+
+    multiplatform {
+        global {
+            perPackageOption {
+                prefix = "com.insanusmokrassar"
+                skipDeprecated = true
+                includeNonPublic = true
+                reportUndocumented = true
+            }
+
+            sourceLink {
+                path = "./"
+                url = "https://github.com/InsanusMokrassar/krontab/blob/master/"
+                lineSuffix = "#L"
+            }
+        }
+
+        common {
+            targets = ["JVM", "JS"]
+            sourceRoot { path = "src/commonMain" }
+        }
+        js {
+            targets = ["JS"]
+            sourceRoot { path = "src/jsMain" }
+        }
+        jvm {
+            targets = ["JVM"]
+            sourceRoot { path = "src/jvmMain" }
+        }
+    }
+}

gradle.properties

@@ -1,9 +1,11 @@
 kotlin.code.style=official
-kotlin_version=1.3.70
-kotlin_coroutines_version=1.3.5
+kotlin_version=1.3.72
+kotlin_coroutines_version=1.3.7
+
+dokka_version=0.10.1
 
 gradle_bintray_plugin_version=1.8.4
 
-klockVersion=1.10.0
+klockVersion=1.11.3
 
 kotlin.incremental.multiplatform=true

src/commonMain/kotlin/com/insanusmokrassar/krontab/Executes.kt

@@ -1,32 +1,53 @@
 package com.insanusmokrassar.krontab
 
 import com.soywiz.klock.DateTime
+import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.delay
 
-suspend inline fun KronScheduler.doWhile(noinline block: suspend () -> Boolean) {
-    do {
-        delay(next().unixMillisLong - DateTime.now().unixMillisLong)
-    } while (block())
+/**
+ * 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 explicit.
+ */
+suspend inline fun <T> KronScheduler.doOnce(noinline block: suspend () -> T): T {
+    delay((next() - DateTime.now()).millisecondsLong)
+    return block()
 }
+
+/**
+ * Will [createSimpleScheduler] using [scheduleConfig] and call [doOnce] on it
+ */
+suspend inline fun <T> doOnce(
+    scheduleConfig: String,
+    noinline block: suspend () -> T
+) = createSimpleScheduler(scheduleConfig).doOnce(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)
+}
+
+/**
+ * Will [createSimpleScheduler] using [scheduleConfig] and call [doWhile] with [block]
+ */
 suspend inline fun doWhile(
     scheduleConfig: String,
     noinline block: suspend () -> Boolean
 ) = createSimpleScheduler(scheduleConfig).doWhile(block)
 
+/**
+ * Will execute [block] without any checking of result
+ */
 suspend inline fun KronScheduler.doInfinity(noinline block: suspend () -> Unit) = doWhile {
     block()
     true
 }
+/**
+ * Will [createSimpleScheduler] using [scheduleConfig] and call [doInfinity] with [block]
+ */
 suspend inline fun doInfinity(
     scheduleConfig: String,
     noinline block: suspend () -> Unit
 ) = createSimpleScheduler(scheduleConfig).doInfinity(block)
-
-suspend inline fun KronScheduler.doOnce(noinline block: suspend () -> Unit) = doWhile {
-    block()
-    false
-}
-suspend inline fun doOnce(
-    scheduleConfig: String,
-    noinline block: suspend () -> Unit
-) = createSimpleScheduler(scheduleConfig).doOnce(block)

src/commonMain/kotlin/com/insanusmokrassar/krontab/KronScheduler.kt

@@ -2,6 +2,20 @@ package com.insanusmokrassar.krontab
 
 import com.soywiz.klock.DateTime
 
+/**
+ * This interface was created for abstraction of [next] operation. Currently, there is only
+ * [com.insanusmokrassar.krontab.internal.CronDateTimeScheduler] realisation of this interface inside of this library,
+ * but you it is possible to create your own realisation of this interface for scheduling, for example, depending of
+ * users activity or something like this
+ *
+ * @see com.insanusmokrassar.krontab.internal.CronDateTimeScheduler
+ */
 interface KronScheduler {
+
+    /**
+     * @return Next [DateTime] when some action must be triggered according to settings of this instance
+     *
+     * @see com.insanusmokrassar.krontab.internal.CronDateTimeScheduler.next
+     */
     suspend fun next(relatively: DateTime = DateTime.now()): DateTime
 }

src/commonMain/kotlin/com/insanusmokrassar/krontab/SchedulerShortcuts.kt

@@ -2,28 +2,50 @@ package com.insanusmokrassar.krontab
 
 import com.insanusmokrassar.krontab.builder.buildSchedule
 import com.insanusmokrassar.krontab.internal.CronDateTime
+import com.insanusmokrassar.krontab.internal.CronDateTimeScheduler
 
 internal val anyCronDateTime by lazy {
     CronDateTime()
 }
+
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now]
+ */
 val AnyTimeScheduler: KronScheduler by lazy {
     CronDateTimeScheduler(listOf(anyCronDateTime))
 }
-val EverySecondScheduler: KronScheduler
-    get() = AnyTimeScheduler
 
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now] + one second
+ */
+val EverySecondScheduler: KronScheduler by lazy {
+    buildSchedule { seconds { 0 every 1 } }
+}
+
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now] + one minute
+ */
 val EveryMinuteScheduler: KronScheduler by lazy {
     buildSchedule { minutes { 0 every 1 } }
 }
 
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now] + one hour
+ */
 val EveryHourScheduler: KronScheduler by lazy {
     buildSchedule { hours { 0 every 1 } }
 }
 
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now] + one day
+ */
 val EveryDayOfMonthScheduler: KronScheduler by lazy {
     buildSchedule { dayOfMonth { 0 every 1 } }
 }
 
+/**
+ * [KronScheduler.next] will always return [com.soywiz.klock.DateTime.now] + one month
+ */
 val EveryMonthScheduler: KronScheduler by lazy {
     buildSchedule { months { 0 every 1 } }
 }

src/commonMain/kotlin/com/insanusmokrassar/krontab/StringParser.kt

@@ -5,27 +5,38 @@ import com.insanusmokrassar.krontab.internal.*
 /**
  * Parse [incoming] string and adapt according to next format: "* * * * *" where order of things:
  *
- * seconds
- * minutes
- * hours
- * dayOfMonth
- * month
+ * * seconds
+ * * minutes
+ * * hours
+ * * dayOfMonth
+ * * month
  *
  * And each one have next format:
  *
- * {number},{number},...
+ * `{number},{number},...`
  *
- * and {number} here is one of {int}-{int} OR {int}/{int} OR *\/{int} OR {int}.
+ * and {number} here is one of
  *
- * Seconds ranges can be found in [com.insanusmokrassar.krontab.internal.secondsRange].
- * Minutes ranges can be found in [com.insanusmokrassar.krontab.internal.minutesRange].
- * Hours ranges can be found in [com.insanusmokrassar.krontab.internal.hoursRange].
- * Days of month ranges can be found in [com.insanusmokrassar.krontab.internal.dayOfMonthRange].
- * Months ranges can be found in [com.insanusmokrassar.krontab.internal.monthRange].
+ * * {int}-{int}
+ * * {int}/{int}
+ * * */{int}
+ * * {int}
  *
- * @sample "0/5 * * * *" for every five seconds triggering
- * @sample "0/15 30 * * *" for every 15th seconds in a half of each hour
- * @sample "1 2 3 4 5" for triggering in near first second of second minute of third hour of fourth day of may
+ * Additional info about ranges can be found in follow accordance:
+ *
+ * * Seconds ranges can be found in [secondsRange]
+ * * Minutes ranges can be found in [minutesRange]
+ * * Hours ranges can be found in [hoursRange]
+ * * Days of month ranges can be found in [dayOfMonthRange]
+ * * Months ranges can be found in [monthRange]
+ *
+ * Examples:
+ *
+ * * "0/5 * * * *" for every five seconds triggering
+ * * "0/15 30 * * *" for every 15th seconds in a half of each hour
+ * * "1 2 3 4 5" for triggering in near first second of second minute of third hour of fourth day of may
+ *
+ * @see com.insanusmokrassar.krontab.internal.createKronScheduler
  */
 fun createSimpleScheduler(incoming: String): KronScheduler {
     val (secondsSource, minutesSource, hoursSource, dayOfMonthSource, monthSource) = incoming.split(" ")
@@ -36,27 +47,12 @@ fun createSimpleScheduler(incoming: String): KronScheduler {
     val dayOfMonthParsed = parseDaysOfMonth(dayOfMonthSource)
     val monthParsed = parseMonths(monthSource)
 
-    val resultCronDateTimes = mutableListOf(CronDateTime())
-
-    secondsParsed ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(seconds = currentTime)
-    }
-
-    minutesParsed ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(minutes = currentTime)
-    }
-
-    hoursParsed ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(hours = currentTime)
-    }
-
-    dayOfMonthParsed ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(dayOfMonth = currentTime)
-    }
-
-    monthParsed ?.fillWith(resultCronDateTimes) { previousCronDateTime: CronDateTime, currentTime: Byte ->
-        previousCronDateTime.copy(month = currentTime)
-    }
-
-    return CronDateTimeScheduler(resultCronDateTimes.toList())
+    return createKronScheduler(
+        secondsParsed, minutesParsed, hoursParsed, dayOfMonthParsed, monthParsed
+    )
 }
+
+/**
+ *
+ */
+fun buildSchedule(incoming: String): KronScheduler = createSimpleScheduler(incoming)

src/commonMain/kotlin/com/insanusmokrassar/krontab/builder/SchedulerBuilder.kt

@@ -1,10 +1,16 @@
 package com.insanusmokrassar.krontab.builder
 
-import com.insanusmokrassar.krontab.CronDateTimeScheduler
 import com.insanusmokrassar.krontab.KronScheduler
+import com.insanusmokrassar.krontab.internal.*
 import com.insanusmokrassar.krontab.internal.CronDateTime
+import com.insanusmokrassar.krontab.internal.CronDateTimeScheduler
 import com.insanusmokrassar.krontab.internal.fillWith
 
+/**
+ * Will help to create an instance of [KronScheduler]
+ *
+ * @see com.insanusmokrassar.krontab.createSimpleScheduler
+ */
 fun buildSchedule(settingsBlock: SchedulerBuilder.() -> Unit): KronScheduler {
     val builder = SchedulerBuilder()
 
@@ -36,6 +42,9 @@ class SchedulerBuilder(
         } ?: builderValue
     }
 
+    /**
+     * Starts an seconds block
+     */
     fun seconds(block: SecondsBuilder.() -> Unit) {
         seconds = callAndReturn(
             seconds,
@@ -44,6 +53,9 @@ class SchedulerBuilder(
         )
     }
 
+    /**
+     * Starts an minutes block
+     */
     fun minutes(block: MinutesBuilder.() -> Unit) {
         minutes = callAndReturn(
             minutes,
@@ -52,6 +64,9 @@ class SchedulerBuilder(
         )
     }
 
+    /**
+     * Starts an hours block
+     */
     fun hours(block: HoursBuilder.() -> Unit) {
         hours = callAndReturn(
             hours,
@@ -60,6 +75,9 @@ class SchedulerBuilder(
         )
     }
 
+    /**
+     * Starts an days of month block
+     */
     fun dayOfMonth(block: DaysOfMonthBuilder.() -> Unit) {
         dayOfMonth = callAndReturn(
             dayOfMonth,
@@ -68,6 +86,9 @@ class SchedulerBuilder(
         )
     }
 
+    /**
+     * Starts an months block
+     */
     fun months(block: MonthsBuilder.() -> Unit) {
         month = callAndReturn(
             month,
@@ -76,29 +97,11 @@ class SchedulerBuilder(
         )
     }
 
-    fun build(): KronScheduler {
-        val resultCronDateTimes = mutableListOf(CronDateTime())
-
-        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)
-        }
-
-        return CronDateTimeScheduler(resultCronDateTimes.toList())
-    }
+    /**
+     * @return Completely built and independent [KronScheduler]
+     *
+     * @see com.insanusmokrassar.krontab.createSimpleScheduler
+     * @see com.insanusmokrassar.krontab.internal.createKronScheduler
+     */
+    fun build(): KronScheduler = createKronScheduler(seconds, minutes, hours, dayOfMonth, month)
 }

src/commonMain/kotlin/com/insanusmokrassar/krontab/builder/TimeBuilder.kt

@@ -3,27 +3,53 @@ package com.insanusmokrassar.krontab.builder
 import com.insanusmokrassar.krontab.internal.*
 import com.insanusmokrassar.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]
+ */
 sealed class TimeBuilder (
     private val restrictionsRange: IntRange
 ) {
     private var result: Set<Int>? = null
 
+    /**
+     * After calling of this function this builder will allow any value of current time
+     */
+    @Suppress("unused")
     fun allowAll() {
         result = null
     }
 
+    /**
+     * Will include all variations from this array inside of this timeline
+     */
+    @Suppress("MemberVisibilityCanBePrivate")
     infix fun include(array: Array<Int>) {
         val clamped = array.map { it.clamp(restrictionsRange) } + (result ?: emptySet())
         result = clamped.toSet()
     }
 
+    /**
+     * Add one [value] to current timeline
+     */
+    @Suppress("unused")
     infix fun at(value: Int) {
         result = (result ?: emptySet()) + value.clamp(restrictionsRange)
     }
 
+    /**
+     * Just wrapper for more obvious writing something like "[from] 2 [every] 5". For example, for [SecondsBuilder] it
+     * will mean "[from] second second [every] 5 seconds", or "2, 7, 13, ..."
+     */
     @Suppress("NOTHING_TO_INLINE")
-    inline fun from(value: Int) = value
+    inline infix fun from(value: Int) = value
 
+    /**
+     * Will create an sequence of times starting [from] [this] [every] [delay] times. For example, for [SecondsBuilder] it
+     * will mean "[from] second second [every] 5 seconds", or "2, 7, 13, ..."
+     *
+     * @see [from]
+     */
     infix fun Int.every(delay: Int): Array<Int> {
         val progression = clamp(restrictionsRange) .. restrictionsRange.last step delay
         val result = progression.toSet().toTypedArray()
@@ -32,8 +58,16 @@ sealed class TimeBuilder (
 
         return result
     }
-    infix fun every(delay: Int): Array<Int> = 0 every delay
 
+    /**
+     * Shortcut for "[from] 0 [every] [delay]"
+     */
+    infix fun every(delay: Int): Array<Int> = this from 0 every delay
+
+    /**
+     * Will fill up this timeline from [this] up to [endIncluding]
+     */
+    @Suppress("MemberVisibilityCanBePrivate")
     infix fun Int.upTo(endIncluding: Int): Array<Int> {
         val progression = clamp(restrictionsRange) .. endIncluding.clamp(restrictionsRange)
         val result = progression.toSet().toTypedArray()
@@ -42,13 +76,17 @@ sealed class TimeBuilder (
 
         return result
     }
-    infix fun upTo(endIncluding: Int): Array<Int> = 0 upTo endIncluding
+    /**
+     * Shortcut for "[from] 0 [upTo] [endIncluding]"
+     */
+    @Suppress("unused")
+    infix fun upTo(endIncluding: Int): Array<Int> = this from 0 upTo endIncluding
 
     internal fun build() = result ?.map { it.toByte() } ?.toTypedArray()
 }
 
 class SecondsBuilder : TimeBuilder(secondsRange)
 class MinutesBuilder : TimeBuilder(minutesRange)
-class HoursBuilder : TimeBuilder(com.insanusmokrassar.krontab.internal.hoursRange)
-class DaysOfMonthBuilder : TimeBuilder(com.insanusmokrassar.krontab.internal.dayOfMonthRange)
+class HoursBuilder : TimeBuilder(hoursRange)
+class DaysOfMonthBuilder : TimeBuilder(dayOfMonthRange)
 class MonthsBuilder : TimeBuilder(monthRange)

src/commonMain/kotlin/com/insanusmokrassar/krontab/internal/CronDateTime.kt

@@ -1,15 +1,16 @@
 package com.insanusmokrassar.krontab.internal
 
+import com.insanusmokrassar.krontab.KronScheduler
 import com.insanusmokrassar.krontab.utils.clamp
 import com.soywiz.klock.DateTime
 import com.soywiz.klock.DateTimeSpan
 
 /**
- * [month] 0-11
- * [dayOfMonth] 0-31
- * [hours] 0-23
- * [minutes] 0-59
- * [seconds] 0-59
+ * @param month 0-11
+ * @param dayOfMonth 0-31
+ * @param hours 0-23
+ * @param minutes 0-59
+ * @param seconds 0-59
  */
 internal data class CronDateTime(
     val month: Byte? = null,
@@ -19,16 +20,24 @@ internal data class CronDateTime(
     val seconds: Byte? = null
 ) {
     init {
-        check(month ?.let { it in com.insanusmokrassar.krontab.internal.monthRange } ?: true)
-        check(dayOfMonth ?.let { it in com.insanusmokrassar.krontab.internal.dayOfMonthRange } ?: true)
-        check(hours?.let { it in com.insanusmokrassar.krontab.internal.hoursRange } ?: true)
-        check(minutes?.let { it in com.insanusmokrassar.krontab.internal.minutesRange } ?: true)
-        check(seconds?.let { it in com.insanusmokrassar.krontab.internal.secondsRange } ?: 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)
     }
 
     internal val klockDayOfMonth = dayOfMonth ?.plus(1)
 
     companion object {
+        /**
+         * Using [clamp] extension for checking every parameter to be ensure that they are all correct
+         * @param month 0-11
+         * @param dayOfMonth 0-31
+         * @param hours 0-23
+         * @param minutes 0-59
+         * @param seconds 0-59
+         */
         fun create(
             month: Int? = null,
             dayOfMonth: Int? = null,
@@ -36,15 +45,18 @@ internal data class CronDateTime(
             minutes: Int? = null,
             seconds: Int? = null
         ) = CronDateTime(
-            month ?.clamp(com.insanusmokrassar.krontab.internal.monthRange) ?.toByte(),
-            dayOfMonth ?.clamp(com.insanusmokrassar.krontab.internal.dayOfMonthRange) ?.toByte(),
-            hours ?.clamp(com.insanusmokrassar.krontab.internal.hoursRange) ?.toByte(),
-            minutes ?.clamp(com.insanusmokrassar.krontab.internal.minutesRange) ?.toByte(),
-            seconds ?.clamp(com.insanusmokrassar.krontab.internal.secondsRange) ?.toByte()
+            month ?.clamp(monthRange) ?.toByte(),
+            dayOfMonth ?.clamp(dayOfMonthRange) ?.toByte(),
+            hours ?.clamp(hoursRange) ?.toByte(),
+            minutes ?.clamp(minutesRange) ?.toByte(),
+            seconds ?.clamp(secondsRange) ?.toByte()
         )
     }
 }
 
+/**
+ * @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
 
@@ -75,3 +87,38 @@ internal fun CronDateTime.toNearDateTime(relativelyTo: DateTime = DateTime.now()
 
     return current
 }
+
+/**
+ * @return [KronScheduler] (in fact [CronDateTimeScheduler]) based on incoming data
+ */
+internal fun createKronScheduler(
+    seconds: Array<Byte>? = null,
+    minutes: Array<Byte>? = null,
+    hours: Array<Byte>? = null,
+    dayOfMonth: Array<Byte>? = null,
+    month: Array<Byte>? = null
+): KronScheduler {
+    val resultCronDateTimes = mutableListOf(CronDateTime())
+
+    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)
+    }
+
+    return CronDateTimeScheduler(resultCronDateTimes.toList())
+}

src/commonMain/kotlin/com/insanusmokrassar/krontab/internal/CronDateTimeScheduler.kt

@@ -1,12 +1,30 @@
-package com.insanusmokrassar.krontab
+package com.insanusmokrassar.krontab.internal
 
-import com.insanusmokrassar.krontab.internal.CronDateTime
-import com.insanusmokrassar.krontab.internal.toNearDateTime
+import com.insanusmokrassar.krontab.KronScheduler
+import com.insanusmokrassar.krontab.anyCronDateTime
 import com.soywiz.klock.DateTime
 
+/**
+ * Cron-oriented realisation of [KronScheduler]
+ *
+ * @see com.insanusmokrassar.krontab.AnyTimeScheduler
+ * @see com.insanusmokrassar.krontab.EverySecondScheduler
+ * @see com.insanusmokrassar.krontab.EveryMinuteScheduler
+ * @see com.insanusmokrassar.krontab.EveryHourScheduler
+ * @see com.insanusmokrassar.krontab.EveryDayOfMonthScheduler
+ * @see com.insanusmokrassar.krontab.EveryMonthScheduler
+ *
+ * @see com.insanusmokrassar.krontab.builder.buildSchedule
+ * @see com.insanusmokrassar.krontab.builder.SchedulerBuilder
+ */
 internal data class CronDateTimeScheduler internal constructor(
     internal val cronDateTimes: List<CronDateTime>
 ) : KronScheduler {
+    /**
+     * @return Near date using [cronDateTimes] list and getting the [Iterable.min] one
+     *
+     * @see toNearDateTime
+     */
     override suspend fun next(relatively: DateTime): DateTime {
         return cronDateTimes.map { it.toNearDateTime(relatively) }.min() ?: anyCronDateTime.toNearDateTime(relatively)
     }

src/commonMain/kotlin/com/insanusmokrassar/krontab/utils/Data.kt

@@ -1,4 +1,12 @@
 package com.insanusmokrassar.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/commonTest/kotlin/com/insanusmokrassar/krontab/utils/StringParseTest.kt

@@ -0,0 +1,63 @@
+package com.insanusmokrassar.krontab.utils
+
+import com.insanusmokrassar.krontab.buildSchedule
+import com.insanusmokrassar.krontab.builder.buildSchedule
+import com.insanusmokrassar.krontab.createSimpleScheduler
+import com.soywiz.klock.DateTime
+import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.flow.takeWhile
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+@ExperimentalCoroutinesApi
+@FlowPreview
+class StringParseTest {
+    @Test
+    fun testThatFlowIsCorrectlyWorkEverySecondBuiltOnString() {
+        val kronScheduler = buildSchedule("*/1 * * * *")
+
+        val flow = kronScheduler.asFlow()
+
+        runTest {
+            val mustBeCollected = 10
+            var collected = 0
+            flow.takeWhile {
+                collected < mustBeCollected
+            }.collect {
+                collected++
+            }
+            assertEquals(mustBeCollected, collected)
+        }
+    }
+
+    @Test
+    fun testThatFlowIsCorrectlyWorkEverySecondWithMuchOfEmittersBuiltOnString() {
+        val kronScheduler = buildSchedule("*/1 * * * *")
+
+        val flow = kronScheduler.asFlow()
+
+        runTest {
+            val testsCount = 10
+            val failJob = it.createFailJob((testsCount * 2) * 1000L)
+            val mustBeCollected = 10
+            val answers = (0 until testsCount).map { _ ->
+                it.async {
+                    var collected = 0
+                    flow.takeWhile {
+                        collected < mustBeCollected
+                    }.collect {
+                        collected++
+                    }
+                    collected
+                }
+            }.awaitAll()
+
+            failJob.cancel()
+
+            answers.forEach {
+                assertEquals(mustBeCollected, it)
+            }
+        }
+    }
+}