KrontabConfig, KronScheduler.Companion and its builders extensions

CHANGELOG.md

@@ -5,6 +5,9 @@
 * Versions
   * `Kotlin`: `1.8.22`
   * `Klock`: `4.0.3`
+* New value class `KrontabConfig`. Since this update, it is preferable way to create `KronScheduler` instead of
+  `KrontabTemplate`
+* You may configure krontab with builders using simple `KronScheduler` invoke extension
 
 ## 2.0.0
 

build.gradle

@@ -8,6 +8,7 @@ buildscript {
 
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "org.jetbrains.kotlin:kotlin-serialization:$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:$android_gradle_version"
@@ -16,6 +17,7 @@ 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"
 }
 
@@ -66,6 +68,7 @@ kotlin {
             dependencies {
                 implementation kotlin('stdlib')
                 api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
+                api "org.jetbrains.kotlinx:kotlinx-serialization-core:$kotlin_serialization_version"
 
                 api "com.soywiz.korlibs.klock:klock:$klockVersion"
             }

gradle.properties

@@ -11,6 +11,7 @@ android.enableJetifier=false
 
 kotlin_version=1.8.22
 kotlin_coroutines_version=1.6.4
+kotlin_serialization_version=1.5.1
 
 dokka_version=1.8.20
 

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

@@ -18,6 +18,8 @@ interface KronScheduler {
      * @see dev.inmo.krontab.internal.CronDateTimeScheduler.next
      */
     suspend fun next(relatively: DateTime = DateTime.now()): DateTime?
+
+    companion object
 }
 
 suspend fun KronScheduler.nextOrRelative(relatively: DateTime = DateTime.now()): DateTime = next(relatively) ?: getAnyNext(relatively)

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

@@ -4,6 +4,8 @@ import korlibs.time.TimezoneOffset
 import korlibs.time.minutes
 import dev.inmo.krontab.internal.*
 import dev.inmo.krontab.utils.Minutes
+import kotlinx.serialization.Serializable
+import kotlin.jvm.JvmInline
 
 /**
  * @see createSimpleScheduler
@@ -11,6 +13,150 @@ import dev.inmo.krontab.utils.Minutes
  */
 typealias KrontabTemplate = String
 
+/**
+ * This value class contains [KrontabTemplate]
+ *
+ * * **seconds**
+ * * **minutes**
+ * * **hours**
+ * * **dayOfMonth**
+ * * **month**
+ * * **year** (optional)
+ * * **offset** (optional) (can be placed anywhere after month) (must be marked with `o` at the end, for example: 60o == +01:00)
+ * * **dayOfWeek** (optional) (can be placed anywhere after month)
+ * * **milliseconds** (optional) (can be placed anywhere after month) (must be marked with `ms` at the end, for example: 500ms; 100-200ms)
+ *
+ * And each one (except of offsets) have next format:
+ *
+ * `{number}[,{number},...]` or `*`
+ *
+ * and {number} here is one of
+ *
+ * * {int}-{int}
+ * * {int}/{int}
+ * * */{int}
+ * * {int}
+ * * 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]
+ * * 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]
+ * * Years ranges can be found in [yearRange] (in fact - any [Int])
+ * * WeekDay (timezone) ranges can be found in [dayOfWeekRange]
+ * * Milliseconds ranges can be found in [millisecondsRange]
+ *
+ * Examples:
+ *
+ * * "0/5 * * * *" for every five seconds triggering
+ * * "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
+ * * "0/15 30 * * * 500ms" for every 15th seconds in a half of each hour when milliseconds equal to 500
+ * * "1 2 3 F,4,L 5" for triggering in near first second of second minute of third hour of first, fifth and last days of may
+ * * "1 2 3 F,4,L 5 60o" for triggering in near first second of second minute of third hour of first, fifth and last days 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 first, fifth and last days 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 first, fifth and last days 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 first, fifth and last days 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 first, fifth and last days of may of 2021st year if it will be in Sunday-Tuesday week days with timezone UTC+01:00
+ * * "1 2 3 F,4,L 5 2021 60o 0-2w 500ms" for triggering in near first second of second minute of third hour of first, fifth and last days of may of 2021st year if it will be in Sunday-Tuesday week days with timezone UTC+01:00 when milliseconds will be equal to 500
+ *
+ * @see dev.inmo.krontab.internal.createKronScheduler
+ */
+@Serializable
+@JvmInline
+value class KrontabConfig(
+    @Suppress("MemberVisibilityCanBePrivate")
+    val template: KrontabTemplate
+) {
+    /**
+     * Creates __new__ [KronScheduler] based on a [template]
+     *
+     * @return In case when offset parameter is absent in [template] will be used [createSimpleScheduler] method and
+     * returned [CronDateTimeScheduler]. In case when offset parameter there is in [template] [KrontabTemplate] will be used
+     * [createKronSchedulerWithOffset] and returned [CronDateTimeSchedulerTz]
+     */
+    fun scheduler(): KronScheduler {
+        var offsetParsed: Int? = null
+        var dayOfWeekParsed: Array<Byte>? = null
+        var yearParsed: Array<Int>? = null
+        var millisecondsParsed: Array<Short>? = null
+        val (secondsSource, minutesSource, hoursSource, dayOfMonthSource, monthSource) = template.split(" ").also {
+            listOfNotNull(
+                it.getOrNull(5),
+                it.getOrNull(6),
+                it.getOrNull(7),
+                it.getOrNull(8)
+            ).forEach {
+                val offsetFromString = parseOffset(it)
+                val dayOfWeekFromString = parseWeekDay(it)
+                val millisecondsFromString = parseMilliseconds(it)
+                offsetParsed = offsetParsed ?: offsetFromString
+                dayOfWeekParsed = dayOfWeekParsed ?: dayOfWeekFromString
+                millisecondsParsed = millisecondsParsed ?: millisecondsFromString
+                when {
+                    dayOfWeekFromString != null || offsetFromString != null || millisecondsFromString != null -> return@forEach
+                    yearParsed == null -> {
+                        yearParsed = parseYears(it)
+                    }
+                }
+            }
+        }
+
+        val secondsParsed = parseSeconds(secondsSource)
+        val minutesParsed = parseMinutes(minutesSource)
+        val hoursParsed = parseHours(hoursSource)
+        val dayOfMonthParsed = parseDaysOfMonth(dayOfMonthSource)
+        val monthParsed = parseMonths(monthSource)
+
+        return offsetParsed ?.let { offset ->
+            createKronSchedulerWithOffset(
+                secondsParsed,
+                minutesParsed,
+                hoursParsed,
+                dayOfMonthParsed,
+                monthParsed,
+                yearParsed,
+                dayOfWeekParsed,
+                TimezoneOffset(offset.minutes),
+                millisecondsParsed ?: millisecondsArrayDefault
+            )
+        } ?: createKronScheduler(
+            secondsParsed,
+            minutesParsed,
+            hoursParsed,
+            dayOfMonthParsed,
+            monthParsed,
+            yearParsed,
+            dayOfWeekParsed,
+            millisecondsParsed ?: millisecondsArrayDefault
+        )
+    }
+
+    /**
+     * Creates base [KronScheduler] using [scheduler] function. In case when returned [KronScheduler] is [KronSchedulerTz],
+     * it will be returned as is. Otherwise, will be created new [CronDateTimeSchedulerTz] with [defaultOffset] as
+     * offset
+     */
+    fun scheduler(defaultOffset: Minutes): KronSchedulerTz {
+        val scheduler = scheduler()
+        return if (scheduler is KronSchedulerTz) {
+            scheduler
+        } else {
+            CronDateTimeSchedulerTz(
+                (scheduler as CronDateTimeScheduler).cronDateTime,
+                TimezoneOffset(defaultOffset.minutes)
+            )
+        }
+    }
+}
+
 /**
  * Parse [incoming] string and adapt according to next format: "* * * * *" where order of things:
  *
@@ -70,80 +216,16 @@ typealias KrontabTemplate = String
  * [createKronSchedulerWithOffset] and returned [CronDateTimeSchedulerTz]
  *
  * @see dev.inmo.krontab.internal.createKronScheduler
+ * @see KrontabConfig.scheduler
  */
 fun createSimpleScheduler(
     incoming: KrontabTemplate
-): KronScheduler {
+): KronScheduler = KrontabConfig(incoming).scheduler()
-    var offsetParsed: Int? = null
-    var dayOfWeekParsed: Array<Byte>? = null
-    var yearParsed: Array<Int>? = null
-    var millisecondsParsed: Array<Short>? = null
-    val (secondsSource, minutesSource, hoursSource, dayOfMonthSource, monthSource) = incoming.split(" ").also {
-        listOfNotNull(
-            it.getOrNull(5),
-            it.getOrNull(6),
-            it.getOrNull(7),
-            it.getOrNull(8)
-        ).forEach {
-            val offsetFromString = parseOffset(it)
-            val dayOfWeekFromString = parseWeekDay(it)
-            val millisecondsFromString = parseMilliseconds(it)
-            offsetParsed = offsetParsed ?: offsetFromString
-            dayOfWeekParsed = dayOfWeekParsed ?: dayOfWeekFromString
-            millisecondsParsed = millisecondsParsed ?: millisecondsFromString
-            when {
-                dayOfWeekFromString != null || offsetFromString != null || millisecondsFromString != null -> return@forEach
-                yearParsed == null -> {
-                    yearParsed = parseYears(it)
-                }
-            }
-        }
-    }
-
-    val secondsParsed = parseSeconds(secondsSource)
-    val minutesParsed = parseMinutes(minutesSource)
-    val hoursParsed = parseHours(hoursSource)
-    val dayOfMonthParsed = parseDaysOfMonth(dayOfMonthSource)
-    val monthParsed = parseMonths(monthSource)
-
-    return offsetParsed ?.let { offset ->
-        createKronSchedulerWithOffset(
-            secondsParsed,
-            minutesParsed,
-            hoursParsed,
-            dayOfMonthParsed,
-            monthParsed,
-            yearParsed,
-            dayOfWeekParsed,
-            TimezoneOffset(offset.minutes),
-            millisecondsParsed ?: millisecondsArrayDefault
-        )
-    } ?: createKronScheduler(
-        secondsParsed,
-        minutesParsed,
-        hoursParsed,
-        dayOfMonthParsed,
-        monthParsed,
-        yearParsed,
-        dayOfWeekParsed,
-        millisecondsParsed ?: millisecondsArrayDefault
-    )
-}
 
 fun createSimpleScheduler(
     incoming: KrontabTemplate,
     defaultOffset: Minutes
-): KronSchedulerTz {
+): KronSchedulerTz = KrontabConfig(incoming).scheduler(defaultOffset)
-    val scheduler = createSimpleScheduler(incoming)
-    return if (scheduler is KronSchedulerTz) {
-        scheduler
-    } else {
-        CronDateTimeSchedulerTz(
-            (scheduler as CronDateTimeScheduler).cronDateTime,
-            TimezoneOffset(defaultOffset.minutes)
-        )
-    }
-}
 
 /**
  * Shortcut for [createSimpleScheduler]

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

@@ -14,7 +14,7 @@ import dev.inmo.krontab.utils.Minutes
  *
  * @see dev.inmo.krontab.createSimpleScheduler
  */
-fun buildSchedule(settingsBlock: SchedulerBuilder.() -> Unit): KronScheduler {
+inline fun buildSchedule(settingsBlock: SchedulerBuilder.() -> Unit): KronScheduler {
     val builder = SchedulerBuilder()
 
     builder.settingsBlock()
@@ -27,7 +27,7 @@ fun buildSchedule(settingsBlock: SchedulerBuilder.() -> Unit): KronScheduler {
  *
  * @see dev.inmo.krontab.createSimpleScheduler
  */
-fun buildSchedule(
+inline fun buildSchedule(
     offset: Minutes,
     settingsBlock: SchedulerBuilder.() -> Unit
 ): KronSchedulerTz {
@@ -38,6 +38,27 @@ fun buildSchedule(
     return builder.build() as KronSchedulerTz
 }
 
+/**
+ * Creates new [KronScheduler] with [settingsBlock]
+ *
+ * Due to the fact that it is inline function, you may break execution of [settingsBlock]
+ * at any time
+ */
+inline operator fun KronScheduler.Companion.invoke(
+    offset: Minutes,
+    settingsBlock: SchedulerBuilder.() -> Unit
+): KronSchedulerTz = buildSchedule(offset, settingsBlock)
+
+/**
+ * Creates new [KronScheduler] with [settingsBlock]
+ *
+ * Due to the fact that it is inline function, you may break execution of [settingsBlock]
+ * at any time
+ */
+inline operator fun KronScheduler.Companion.invoke(
+    settingsBlock: SchedulerBuilder.() -> Unit
+): KronScheduler = buildSchedule(settingsBlock)
+
 class SchedulerBuilder(
     private var seconds: Array<Byte>? = null,
     private var minutes: Array<Byte>? = null,