add Morny CRONs

.gitignore

@@ -1,7 +1,5 @@
 
 # IDE
-.idea/
-.vscode/
 .gradle/
 .settings/
 .metals/

.run/.gitignore

@@ -0,0 +1 @@
+debug.env

.run/Morny CLI [pr].run.xml

@@ -0,0 +1,16 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Morny CLI [pr]" type="Application" factoryName="Application">
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.MornyCLI" />
+    <module name="Coeur Morny Cono" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/Morny Coeur [t][user_dev(env).u_q_c_r_m] [pr].run.xml

@@ -0,0 +1,20 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Morny Coeur [t][user:dev(env).u|q|c|r:m]  [pr]" type="Application" factoryName="Application">
+    <option name="envFilePaths">
+      <option value="$PROJECT_DIR$/.run/debug.env" />
+    </option>
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.core.ServerMain" />
+    <module name="Coeur Morny Cono" />
+    <option name="PROGRAM_PARAMETERS" value="--quiet --debug -t --username sukazyo_deving_bot --master 793274677 --trusted-chat -1 --auto-cmd --outdated-block --trusted-reader-dinner 1040613596 --report-to 793274677 -medc 793274677 -medt 0,2,18,19 -medtz 8 --dinner-chat -1001670950261" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/Morny Coeur [user_dev(env).u_q_c] [pr].run.xml

@@ -0,0 +1,20 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Morny Coeur [user:dev(env).u|q|c]  [pr]" type="Application" factoryName="Application">
+    <option name="envFilePaths">
+      <option value="$PROJECT_DIR$/.run/debug.env" />
+    </option>
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.core.ServerMain" />
+    <module name="Coeur Morny Cono" />
+    <option name="PROGRAM_PARAMETERS" value="--quiet --debug --username sukazyo_deving_bot --master 793274677 --trusted-chat -1 --outdated-block --trusted-reader-dinner 1040613596 -medc 793274677 -medt 0,2,18,19 -medtz 8 --dinner-chat -1001670950261" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/Morny Coeur [user_dev(env).u_q_c_r_m] [pr].run.xml

@@ -0,0 +1,20 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Morny Coeur [user:dev(env).u|q|c|r:m]  [pr]" type="Application" factoryName="Application">
+    <option name="envFilePaths">
+      <option value="$PROJECT_DIR$/.run/debug.env" />
+    </option>
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.core.ServerMain" />
+    <module name="Coeur Morny Cono" />
+    <option name="PROGRAM_PARAMETERS" value="--quiet --debug --username sukazyo_deving_bot --master 793274677 --trusted-chat -1 --auto-cmd --outdated-block --trusted-reader-dinner 1040613596 --report-to 793274677 -medc 793274677 -medt 0,2,18,19 -medtz 8 --dinner-chat -1001670950261" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/MornyTests #ALL.run.xml

@@ -0,0 +1,31 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="MornyTests #ALL" type="ScalaTestRunConfiguration" factoryName="ScalaTest" singleton="false" show_console_on_std_err="false" show_console_on_std_out="false">
+    <module name="Coeur Morny Cono" />
+    <option name="VMParameters" value="" />
+    <option name="allowRunningInParallel" value="true" />
+    <option name="alternativeJrePath" />
+    <option name="alternativeJrePathEnabled" value="false" />
+    <option name="classpathModifications">
+      <list />
+    </option>
+    <option name="envs">
+      <map />
+    </option>
+    <option name="passParentEnvs" value="true" />
+    <option name="programParameters" value="" />
+    <option name="projectPathOnTarget" />
+    <option name="selectedOptions">
+      <list />
+    </option>
+    <option name="testKind" value="All in package" />
+    <option name="workingDirectory" value="$ProjectFileDir$\run" />
+    <option name="searchTest" value="In single module" />
+    <option name="shortenClasspath" value="NONE" />
+    <option name="testPackagePath" value="cc.sukazyo.cono.morny.test" />
+    <option name="useUiWithSbt" value="true" />
+    <option name="workingDirectory" value="$ProjectFileDir$\run" />
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/ServerMain [only-hello].run.xml

@@ -0,0 +1,17 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="ServerMain [only-hello]" type="Application" factoryName="Application">
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.core.ServerMain" />
+    <module name="Coeur Morny Cono" />
+    <option name="PROGRAM_PARAMETERS" value="--only-hello" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/ServerMain [version].run.xml

@@ -0,0 +1,17 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="ServerMain [version]" type="Application" factoryName="Application">
+    <option name="MAIN_CLASS_NAME" value="cc.sukazyo.cono.morny.core.ServerMain" />
+    <module name="Coeur Morny Cono" />
+    <option name="PROGRAM_PARAMETERS" value="--version" />
+    <option name="WORKING_DIRECTORY" value="$ProjectFileDir$/run" />
+    <extension name="coverage">
+      <pattern>
+        <option name="PATTERN" value=".*" />
+        <option name="ENABLED" value="true" />
+      </pattern>
+    </extension>
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/debug.env.example

@@ -0,0 +1 @@
+MORNY_TG_TOKEN="2001015432:ABCDEFGH01234567890123456790123456"

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+	"recommendations": [
+		"scalameta.metals",
+		"scala-lang.scala",
+		"scala-lang.scala-snippets",
+		"streetsidesoftware.code-spell-checker",
+		"vscjava.vscode-java-pack"
+	]
+}

.vscode/launch.json

@@ -0,0 +1,57 @@
+{
+	// 使用 IntelliSense 以得知可用的屬性。
+	// 暫留以檢視現有屬性的描述。
+	// 如需詳細資訊，請瀏覽: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Morny Coeur [user:dev|q|d|mm|tc:rm|ac|ob|trd|dc|r:m|med] [pr]",
+			"type": "java",
+			"request": "launch",
+			"projectName": "Coeur Morny Cono",
+			"cwd": "${workspaceFolder}/run",
+			"mainClass": "cc.sukazyo.cono.morny.ServerMain",
+			"vmArgs": ["-Djava.net.useSystemProxies=true"],
+			"envFile": "${workspaceFolder}/.run/debug.env",
+			"args": [
+				"--quiet",
+				"--debug",
+				"--username", "sukazyo_deving_bot",
+				"--master", "793274677",
+				"--trusted-chat", "-1",
+				"--auto-cmd",
+				"--outdated-block",
+				"--trusted-reader-dinner", "1040613596",
+				"--dinner-chat", "-1001670950261",
+				"--report-to", "793274677",
+				"-medc", "793274677", "-medt", "0,2,18,19", "-medtz", "8",
+			]
+		},
+		{
+			"name": "Morny Test [pr]",
+			"type": "java",
+			"request": "launch",
+			"cwd": "${workspaceFolder}/run",
+			"vmArgs": ["-Djava.net.useSystemProxies=true"],
+			"projectName": "Coeur Morny Cono",
+			"mainClass": "cc.sukazyo.cono.morny.MornyTest",
+		},
+		{
+			"name": "UniversalTest [pr]",
+			"type": "java",
+			"request": "launch",
+			"cwd": "${workspaceFolder}/run",
+			"vmArgs": ["-Djava.net.useSystemProxies=true"],
+			"projectName": "Coeur Morny Cono",
+			"mainClass": "cc.sukazyo.cono.morny.UniversalTest",
+		},
+		{
+			"name": "Current File [pr]",
+			"type": "java",
+			"request": "launch",
+			"cwd": "${workspaceFolder}/run",
+			"vmArgs": ["-Djava.net.useSystemProxies=true"],
+			"mainClass": "${file}"
+		},
+	]
+}

.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+	"java.dependency.packagePresentation": "hierarchical",
+	"java.configuration.updateBuildConfiguration": "disabled",
+	"java.compile.nullAnalysis.mode": "disabled",
+	"files.watcherExclude": {
+		"**/target": true
+	},
+	"cSpell.words": [
+		"Coeur",
+		"Gson",
+		"Morny",
+		"userid"
+	]
+}

src/main/scala/cc/sukazyo/cono/morny/core/Log.scala

@@ -4,8 +4,10 @@ import cc.sukazyo.cono.morny.core.internal.logging.{MornyFormatterConsole, Morny
 import cc.sukazyo.messiva.appender.ConsoleAppender
 import cc.sukazyo.messiva.log.LogLevels
 
+/** Logger controller of Morny Coeur program */
 object Log {
 	
+	/** The logger that Morny will use */
 	val logger: MornyLoggerBase = MornyLoggerBase(
 		ConsoleAppender(
 			MornyFormatterConsole()
@@ -13,8 +15,14 @@ object Log {
 	)
 	logger.minLevel(LogLevels.INFO)
 	
+	/** If the debug level logging is enabled
+	  *
+	  * @return `true` when the debug logging is enabled, `false` otherwise.
+	  */
 	def debug: Boolean = logger.levelSetting.minLevel.level <= LogLevels.DEBUG.level
 	
+	/** Set if the debug logging should be enabled.
+	  */
 	def debug (is: Boolean): Unit =
 		if is then logger.minLevel(LogLevels.ALL)
 		else logger.minLevel(LogLevels.INFO)

src/main/scala/cc/sukazyo/cono/morny/core/MornyCoeur.scala

@@ -367,7 +367,6 @@ class MornyCoeur (modules: List[MornyModule])(using val config: MornyConfig)(tes
 	  * }}}
 	  */
 	object dsl extends BotExtension {
-		given coeur: MornyCoeur = MornyCoeur.this
 		given account: TelegramBot = MornyCoeur.this.account
 		given translations: MornyLangs = MornyCoeur.this.lang
 	}

src/main/scala/cc/sukazyo/cono/morny/core/MornyModule.scala

@@ -4,10 +4,44 @@ import cc.sukazyo.cono.morny.core.MornyCoeur.*
 
 trait MornyModule {
 	
+	/** The unique id of this Morny module.
+	  *
+	  * Requires to be unique between modules that will loaded, requires only contains ASCII
+	  * characters excepts control characters.
+	  *
+	  * This module id will listed in the module lists as the primary key. Although currently
+	  * is no checks to make sure this is unique (and if is legal), it is still highly
+	  * recommended making this unique between modules, for forward compatibles and third-party
+	  * compatibles.
+	  *
+	  * Recommended to be named using all lowercased characters and hyphen character (`-`) like
+	  * `module-author-or-provider.module-name` . For example, the Morny internal module
+	  * `morny_misc` has the id `morny.misc`, and `stickers_get` has the id `morny.stickers-get`.
+	  */
 	val id: String
+	/** Human readable name of this Morny module.
+	  *
+	  * No specific formats requires except do not contains ASCII control characters.
+	  *
+	  * No special usage except showing in module table.
+	  *
+	  * Recommended set this to a English name while the i18n for this is not implemented yet.
+	  */
 	val name: String
+	/** Version of this module build.
+	  *
+	  * No special usage except showing in module table.
+	  */
 	val version: String
 	
+	/** Human readable description of this Morny module.
+	  *
+	  * Should be a Markdown document.
+	  *
+	  * No special usage.
+	  *
+	  * Recommended to use English while the i18n for this is not implemented yet.
+	  */
 	val description: String | Null
 	
 	def onInitializingPre (using MornyCoeur)(cxt: OnInitializingPreContext): Unit = {}

src/main/scala/cc/sukazyo/cono/morny/core/MornySystem.scala

@@ -13,24 +13,100 @@ import java.security.NoSuchAlgorithmException
 
 object MornySystem {
 	
+	/** The normal version string without extra context (`+000` fields).
+	  *
+	  * Should contains base version ([[VERSION_BASE]]), with additional [[VERSION_DELTA version delta]]
+	  * or snapshot tag if exists.
+	  *
+	  * For example `1.0.0`, `2.1.1-beta2`, `0.19.2-SNAPSHOT`, `2.0.0-alpha19-SNAPSHOT`
+	  */
 	@BuildConfigField val VERSION: String = BuildConfig.VERSION
+	/** The full specific version string with extra context (`+000` fields).
+	  *
+	  * Should contains all the normal version ([[VERSION]]), additional with git commit hash
+	  * if exists.
+	  *
+	  * For example `2.0.0-alpha19-SNAPSHOT+git254ec2a5`
+	  */
 	@BuildConfigField val VERSION_FULL: String = BuildConfig.VERSION_FULL
+	/** The base version string.
+	  *
+	  * Contains only the main version number (0.0.0) and alpha/beta/RC version (-alpha20). NO
+	  * snapshot tag or [[VERSION_DELTA version delta]] is included.
+	  */
 	@BuildConfigField val VERSION_BASE: String = BuildConfig.VERSION_BASE
+	/** The version delta string if exists.
+	  *
+	  * This delta is for debug purpose when it is designed, it adds a field to the normal
+	  * version string to help shows if the code is updated in debug environment.
+	  *
+	  * The standard version delta is a string starts with `-ð`, attached after the
+	  * [[VERSION_BASE base version]].
+	  *
+	  * It is currently not in used in official environment yet.
+	  */
 	@BuildConfigField val VERSION_DELTA: Option[String] = BuildConfig.VERSION_DELTA
+	/** The full length git commit id that this build is based on.
+	  *
+	  * Along the workspace is in a checked out git repo, this field will be the currently checked
+	  * out git commit, no matter the git repo is clean or not.
+	  *
+	  * Only exists when this is built with git repo, if there's no git repo, this will only be
+	  * [[None]].
+	  */
 	@BuildConfigField val GIT_COMMIT: Option[String] = Some(BuildConfig.COMMIT)
+	/** The build time in [[EpochMillis]].
+	  *
+	  * If this build is built with a git repo and the git repo is clean, that means the source
+	  * code should have no changes with [[GIT_COMMIT the currently checked out git commit]],
+	  * then we call this is a **clean build**, and this timestamp will be the [[GIT_COMMIT]]'s
+	  * commit timestamp. This can help us to do a *reproducible build*.
+	  *
+	  * On any other cases, this timestamp will be the [[System.currentTimeMillis]] when the
+	  * `sbt compile` is called.
+	  */
 	@BuildConfigField val CODE_TIMESTAMP: EpochMillis = BuildConfig.CODE_TIMESTAMP
+	/** The codename of this version.
+	  *
+	  * Usually a city name, and usually updates on and only on the minor version (X.Y.z) level
+	  * update.
+	  *
+	  * Should be a lowercased english only string (maybe contains numbers at some point, at
+	  * least not historically).
+	  */
 	@BuildConfigField val CODENAME: String = BuildConfig.CODENAME
+	/** The HTTP url that a git repository of this project can be found.
+	  */
 	@BuildConfigField val CODE_STORE: String = BuildConfig.CODE_STORE
+	/** The string template that the commit url of this build can be found.
+	  *
+	  * Should contains one `%s` placeholder, can be interpolated a [[GIT_COMMIT]] to get the
+	  * page of commit that current build based on.
+	  */
 	//noinspection ScalaWeakerAccess
 	@BuildConfigField val COMMIT_PATH: String = BuildConfig.COMMIT_PATH
 	
+	/** If this build is built with a clean git repo. */
 	@BuildConfigField
 	def isCleanBuild: Boolean = BuildConfig.CLEAN_BUILD
 	
+	/** The HTTP url of git commit which this build is based on.
+	  * 
+	  * Based on [[GIT_COMMIT]] and [[COMMIT_PATH]].
+	  */
 	def currentCodePath: String|Null =
 		if ((COMMIT_PATH eq null) || (GIT_COMMIT isEmpty)) null
 		else COMMIT_PATH.formatted(GIT_COMMIT get)
 	
+	/** The MD5 hash of current running coeur execution jar.
+	  * 
+	  * Only works on the current running coeur is from a jar file.
+	  * 
+	  * If read jar file failed, it possibly means currently is not run from a jar file, then
+	  * this will return `"<non-jar-runtime>"`.
+	  * 
+	  * If failed on calculating MD5 hash, it will return `"<calculation-error>"`.
+	  */
 	def getJarMD5: String = {
 		try {
 			FileUtils.getMD5Three(MornySystem.getClass.getProtectionDomain.getCodeSource.getLocation.toURI.getPath)

src/main/scala/cc/sukazyo/cono/morny/core/ServerModulesLoader.scala

@@ -13,6 +13,7 @@ object ServerModulesLoader {
 			morny.slash_action.ModuleSlashAction(),
 			morny.nbnhhsh.ModuleNbnhhsh(),
 			morny.ip186.ModuleIP186(),
+			morny.crons.ModuleCRONs(),
 			morny.encrypt_tool.ModuleEncryptor(),
 			morny.call_me.ModuleCallMe(),
 			morny.social_share.ModuleSocialShare(),

src/main/scala/cc/sukazyo/cono/morny/core/bot/api/BotExtension.scala

@@ -26,6 +26,19 @@ trait BotExtension {
 	
 	extension (user: User) {
 		
+		/** Get this telegram [[User]]'s prefer language.
+		  * 
+		  * It will check the [[User.languageCode]] provided by Telegram API.
+		  * 
+		  * If a language code is provided, it will be [[LangTag.normalizeLangTag normalized]]
+		  * to [[LangTag]] and return.
+		  * 
+		  * If cannot find a language code associated with this [[User]], the empty string will
+		  * be return.
+		  * 
+		  * @return A [[LangTag.normalizeLangTag normalized]] [[LangTag]] that should be this
+		  *         [[User]]'s prefer language, or a empty string.
+		  */
 		def prefer_language: String =
 			user.languageCode match
 				case null => ""

src/main/scala/cc/sukazyo/cono/morny/core/bot/api/messages/ErrorMessage.scala

@@ -27,9 +27,28 @@ import com.pengrad.telegrambot.request.AbstractSendRequest
   */
 trait ErrorMessage[T1 <: AbstractSendRequest[T1], T2 <: AbstractSendRequest[T2]] {
 	
+	/** The simple variant of this error message.
+	  * 
+	  * In Morny, this is usually a sticker that shows the generic type of the error. 
+	  *
+	  * Can be get by using [[getByType]] with variant tag [[ErrorMessage.Types.Simple]]
+	  * @since 2.0.0
+	  */
 	val simple: T1
+	/** The complex variant of this error message.
+	  *
+	  * In Morny, this should be a text-based message that shows key information of the error
+	  * which want to describe.
+	  *
+	  * Can be get by using [[getByType]] with variant tag [[ErrorMessage.Types.Complex]]
+	  * @since 2.0.0
+	  */
 	val complex: T2
 	
+	/** An context that defines where this error message belongs. Will be used to publish this
+	  * message (aka. send message).
+	  * @since 2.0.0
+	  */
 	val context: MessagingContext.WithMessage
 	
 	/** Get the simple or complex message by the given [[ErrorMessage.Types]] infer.
@@ -58,12 +77,30 @@ trait ErrorMessage[T1 <: AbstractSendRequest[T1], T2 <: AbstractSendRequest[T2]]
 	
 }
 
+/** @see [[ErrorMessage]] */
 object ErrorMessage {
 	
+	/** An enum that contains the tag of an [[ErrorMessage]]'s variant type.
+	  *
+	  * Can be used to get the specific type's message of that type using [[ErrorMessage.getByType]].
+	  *
+	  * @since 2.0.0
+	  */
 	enum Types:
+		/** @see [[ErrorMessage.simple]] */
 		case Simple
+		/** @see [[ErrorMessage.complex]] */
 		case Complex
 	
+	/** A new [[ErrorMessage]].
+	  *
+	  * @since 2.0.0
+	  * @see [[ErrorMessage]]
+	  *
+	  * @param _simple The [[ErrorMessage.simple]] message of this error message.
+	  * @param _complex The [[ErrorMessage.complex]] message of this error message.
+	  * @param cxt The context of this error message, defines where the error message belongs.
+	  */
 	def apply [T1 <: AbstractSendRequest[T1], T2<: AbstractSendRequest[T2]]
 	(_simple: T1, _complex: T2)(using cxt: MessagingContext.WithMessage): ErrorMessage[T1, T2] =
 		new ErrorMessage[T1, T2]:

src/main/scala/cc/sukazyo/cono/morny/core/internal/BuildConfigField.java

@@ -6,7 +6,7 @@ import java.lang.annotation.ElementType;
 import java.lang.annotation.Target;
 
 /**
- * 这个注解表示当前字段是由 gradle 任务 {@code generateBuildConfig} 自动生成的.
+ * The annotation indicates that the field is generated by the sbt plugin {@code sbtBuildInfo}.
  * @since 1.0.0-alpha4
  */
 @Documented

src/main/scala/cc/sukazyo/cono/morny/crons/ModuleCRONs.scala

@@ -0,0 +1,24 @@
+package cc.sukazyo.cono.morny.crons
+
+import cc.sukazyo.cono.morny.core.internal.MornyInternalModule
+import cc.sukazyo.cono.morny.core.MornyCoeur
+import cc.sukazyo.cono.morny.crons.cmd.CommandCreate
+
+class ModuleCRONs extends MornyInternalModule {
+	
+	override val id: String = "morny.cron"
+	override val name: String = "Morny CRON messaging for Users"
+	override val description: String | Null =
+		// language=markdown
+		"""Provides users to set CRON based timer for messaging to themselves.
+		  |
+		  |Not implemented yet while Morny's database is not implemented yet.""".stripMargin
+	
+	override def onInitializing (using MornyCoeur)(cxt: MornyCoeur.OnInitializingContext): Unit = {
+		import cxt.commandManager
+		
+		commandManager `register` CommandCreate()
+		
+	}
+	
+}

src/main/scala/cc/sukazyo/cono/morny/crons/cmd/CommandCreate.scala

@@ -0,0 +1,81 @@
+package cc.sukazyo.cono.morny.crons.cmd
+
+import cc.sukazyo.cono.morny.core.bot.api.{ICommandAlias, ISimpleCommand}
+import cc.sukazyo.cono.morny.core.MornyCoeur
+import cc.sukazyo.cono.morny.core.bot.api.messages.{ErrorMessage, MessagingContext}
+import cc.sukazyo.cono.morny.data.TelegramStickers
+import cc.sukazyo.cono.morny.util.tgapi.InputCommand
+import cc.sukazyo.cono.morny.util.tgapi.TelegramExtensions.Requests.unsafeExecute
+import cc.sukazyo.cono.morny.util.UseThrowable.toLogString
+import com.cronutils.descriptor.CronDescriptor
+import com.cronutils.model.{Cron, CronType}
+import com.cronutils.model.definition.CronDefinitionBuilder
+import com.cronutils.model.time.ExecutionTime
+import com.cronutils.parser.CronParser
+import com.pengrad.telegrambot.model.{Message, Update}
+import com.pengrad.telegrambot.request.{SendMessage, SendSticker}
+
+import java.time.ZonedDateTime
+import java.time.format.DateTimeFormatter
+
+class CommandCreate (using coeur: MornyCoeur) extends ISimpleCommand {
+	import coeur.dsl.{*, given}
+	
+	override val name: String = "create_cron_message"
+	override val aliases: List[ICommandAlias] = Nil
+	
+	override def execute (using command: InputCommand, event: Update): Unit = {
+		given context: MessagingContext.WithUserAndMessage = MessagingContext.extract(using event.message)
+		
+		SendMessage(
+			context.bind_chat.id,
+			"Type your CRON expression below:"
+		).replyToMessageId(context.bind_message.messageId)
+			.unsafeExecute
+		
+		coeur.messageThreading.doAfter(execute1)
+		
+	}
+	
+	def execute1 (message: Message, prev: MessagingContext.WithUserAndMessage): Unit = {
+		given context: MessagingContext.WithUserAndMessage = MessagingContext.extract(using message)
+		
+		val cron: Cron =
+			try CronParser(CronDefinitionBuilder.instanceDefinitionFor(CronType.UNIX))
+				.parse(message.text())
+			catch case e: IllegalArgumentException =>
+				ErrorMessage(
+					SendSticker(
+						context.bind_chat.id,
+						TelegramStickers.ID_404
+					),
+					SendMessage(
+						context.bind_chat.id,
+						s"""Probably you've entered an invalid CRON expression:
+						   |
+						   |${e.toLogString}
+						   |""".stripMargin
+					)
+				).submit
+				return
+		
+		val cron_describe = CronDescriptor.instance().describe(cron)
+		val current = ZonedDateTime.now()
+		val cron_exec_time = ExecutionTime.forCron(cron)
+		val cron_next = cron_exec_time.nextExecution(current)
+		val cron_prev = cron_exec_time.lastExecution(current)
+		SendMessage(
+			context.bind_chat.id,
+			s"""Set CRON task.
+			   |
+			   |Your cron settings is runs $cron_describe
+			   |Previous runs at: ${cron_prev.map(_.format(DateTimeFormatter.ISO_DATE_TIME)).orElse("Will not run before.")}
+			   |Next will run at: ${cron_next.map(_.format(DateTimeFormatter.ISO_DATE_TIME)).orElse("Will not run afterwards.")}
+			   |
+			   |""".stripMargin
+		).replyToMessageId(context.bind_message.messageId)
+			.unsafeExecute
+		
+	}
+	
+}