complete sample with native

RandomFileSenderBot/build.gradle

@@ -8,14 +8,45 @@ buildscript {
     }
 }
 
-apply plugin: 'kotlin'
+plugins {
+    id "org.jetbrains.kotlin.multiplatform"
+}
+
 apply plugin: 'application'
 
 mainClassName="RandomFileSenderBotKt"
 
 
-dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+kotlin {
+    def hostOs = System.getProperty("os.name")
+    def isMingwX64 = hostOs.startsWith("Windows")
+    def nativeTarget
+    if (hostOs == "Linux") nativeTarget = linuxX64("native") { binaries { executable() } }
+    else if (isMingwX64) nativeTarget = mingwX64("native") { binaries { executable() } }
+    else throw new GradleException("Host OS is not supported in Kotlin/Native.")
 
-    implementation "dev.inmo:tgbotapi:$telegram_bot_api_version"
+    jvm()
+
+    sourceSets {
+        commonMain {
+            dependencies {
+                implementation kotlin('stdlib')
+
+                api "dev.inmo:tgbotapi:$telegram_bot_api_version"
+            }
+        }
+
+        nativeMain {
+            dependencies {
+                def engine
+
+                if (hostOs == "Linux") engine = "curl"
+                else if (isMingwX64) engine = "winhttp"
+                else throw new GradleException("Host OS is not supported in Kotlin/Native.")
+
+                api "io.ktor:ktor-client-$engine:$ktor_version"
+            }
+        }
+    }
 }
+

RandomFileSenderBot/src/commonMain/kotlin/Bot.kt

@@ -1,23 +1,25 @@
+import dev.inmo.micro_utils.common.MPPFile
 import dev.inmo.micro_utils.common.filesize
-import dev.inmo.tgbotapi.bot.ktor.telegramBot
 import dev.inmo.tgbotapi.bot.TelegramBot
 import dev.inmo.tgbotapi.extensions.api.bot.getMe
 import dev.inmo.tgbotapi.extensions.api.bot.setMyCommands
-import dev.inmo.tgbotapi.extensions.api.send.*
 import dev.inmo.tgbotapi.extensions.api.send.media.sendDocument
 import dev.inmo.tgbotapi.extensions.api.send.media.sendDocumentsGroup
+import dev.inmo.tgbotapi.extensions.api.send.reply
+import dev.inmo.tgbotapi.extensions.api.send.withUploadDocumentAction
+import dev.inmo.tgbotapi.extensions.api.telegramBot
 import dev.inmo.tgbotapi.extensions.behaviour_builder.buildBehaviourWithLongPolling
 import dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling.onCommandWithArgs
 import dev.inmo.tgbotapi.requests.abstracts.asMultipartFile
 import dev.inmo.tgbotapi.types.BotCommand
 import dev.inmo.tgbotapi.types.chat.Chat
-import dev.inmo.tgbotapi.types.files.DocumentFile
 import dev.inmo.tgbotapi.types.media.TelegramMediaDocument
 import dev.inmo.tgbotapi.types.mediaCountInMediaGroup
-import java.io.File
 
 private const val command = "send_file"
 
+expect fun pickFile(currentRoot: MPPFile): MPPFile?
+
 /**
  * This bot will send files inside of working directory OR from directory in the second argument.
  * You may send /send_file command to this bot to get random file from the directory OR
@@ -25,19 +27,10 @@ private const val command = "send_file"
  * /send_file and `/send_file 1` will have the same effect - bot will send one random file.
  * But if you will send `/send_file 5` it will choose 5 random files and send them as group
  */
-suspend fun main(args: Array<String>) {
-    val botToken = args.first()
-    val directoryOrFile = args.getOrNull(1) ?.let { File(it) } ?: File("")
+suspend fun doRandomFileSenderBot(token: String, folder: MPPFile) {
+    val bot = telegramBot(token)
 
-    fun pickFile(currentRoot: File = directoryOrFile): File? {
-        if (currentRoot.isFile) {
-            return currentRoot
-        } else {
-            return pickFile(currentRoot.listFiles() ?.takeIf { it.isNotEmpty() } ?.random() ?: return null)
-        }
-    }
-
-    suspend fun TelegramBot.sendFiles(chat: Chat, files: List<File>) {
+    suspend fun TelegramBot.sendFiles(chat: Chat, files: List<MPPFile>) {
         when (files.size) {
             1 -> sendDocument(
                 chat.id,
@@ -52,8 +45,6 @@ suspend fun main(args: Array<String>) {
         }
     }
 
-    val bot = telegramBot(botToken)
-
     bot.buildBehaviourWithLongPolling (defaultExceptionsHandler = { it.printStackTrace() }) {
         onCommandWithArgs(command) { message, args ->
 
@@ -62,10 +53,10 @@ suspend fun main(args: Array<String>) {
                 var sent = false
 
                 var left = count
-                val chosen = mutableListOf<File>()
+                val chosen = mutableListOf<MPPFile>()
 
                 while (left > 0) {
-                    val picked = pickFile() ?.takeIf { it.filesize > 0 } ?: continue
+                    val picked = pickFile(folder) ?.takeIf { it.filesize > 0 } ?: continue
                     chosen.add(picked)
                     left--
                     if (chosen.size >= mediaCountInMediaGroup.last) {

RandomFileSenderBot/src/jvmMain/kotlin/ActualPickFile.kt

@@ -0,0 +1,10 @@
+import dev.inmo.micro_utils.common.MPPFile
+import java.io.File
+
+actual fun pickFile(currentRoot: MPPFile): File? {
+    if (currentRoot.isFile) {
+        return currentRoot
+    } else {
+        return pickFile(currentRoot.listFiles() ?.takeIf { it.isNotEmpty() } ?.random() ?: return null)
+    }
+}

RandomFileSenderBot/src/jvmMain/kotlin/RandomFileSenderBot.kt

@@ -0,0 +1,5 @@
+import dev.inmo.micro_utils.common.MPPFile
+
+suspend fun main(args: Array<String>) {
+    doRandomFileSenderBot(args.first(), MPPFile(args.getOrNull(1) ?: ""))
+}

RandomFileSenderBot/src/nativeMain/kotlin/ActualPickFile.kt

@@ -0,0 +1,10 @@
+import dev.inmo.micro_utils.common.MPPFile
+import okio.FileSystem
+
+actual fun pickFile(currentRoot: MPPFile): MPPFile? {
+    if (FileSystem.SYSTEM.exists(currentRoot) && FileSystem.SYSTEM.listOrNull(currentRoot) == null) {
+        return currentRoot
+    } else {
+        return pickFile(FileSystem.SYSTEM.list(currentRoot).takeIf { it.isNotEmpty() } ?.random() ?: return null)
+    }
+}

RandomFileSenderBot/src/nativeMain/kotlin/RandomFileSenderBot.kt

@@ -0,0 +1,8 @@
+import kotlinx.coroutines.runBlocking
+import okio.Path.Companion.toPath
+
+fun main(args: Array<String>) {
+    runBlocking {
+        doRandomFileSenderBot(args.first(), args.getOrNull(1) ?.toPath() ?: "".toPath())
+    }
+}