First tries.

build.gradle

@@ -10,6 +10,25 @@ repositories {
 	}
 }
 
+buildscript {
+	ext.kotlin_version = '1.2.0'
+	
+	repositories {
+		mavenCentral()
+	}
+	
+	dependencies {
+		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+	}
+}
+
+apply plugin: 'kotlin'
+
+compileKotlin {
+	kotlinOptions.apiVersion = "1.0"
+}
+		
+
 dependencies {
 	compile('com.github.badoualy:kotlogram:666a81ef9d6707f117a3fecc2d21c91d51c7d075') {
 		exclude module: 'slf4j-simple'

src/main/java/de/fabianonline/telegram_backup/CommandLineOptions.java

@@ -1,136 +0,0 @@
-/* Telegram_Backup
- * Copyright (C) 2016 Fabian Schlenz
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
-
-package de.fabianonline.telegram_backup;
-
-class CommandLineOptions {
-	public static boolean cmd_console        = false;
-	public static boolean cmd_help           = false;
-	public static boolean cmd_login          = false;
-	public static boolean cmd_debug          = false;
-	public static boolean cmd_trace          = false;
-	public static boolean cmd_trace_telegram = false;
-	public static boolean cmd_list_accounts  = false;
-	public static boolean cmd_version        = false;
-	public static boolean cmd_license        = false;
-	public static boolean cmd_daemon         = false;
-	public static boolean cmd_no_media       = false;
-	public static boolean cmd_anonymize      = false;
-	public static boolean cmd_stats          = false;
-	public static boolean cmd_channels       = false;
-	public static boolean cmd_supergroups    = false;
-
-	public static String  val_account        = null;
-	public static Integer val_limit_messages = null;
-	public static String  val_target         = null;
-	public static String  val_export         = null;
-	public static Integer val_test           = null;
-
-	public static void parseOptions(String[] args) {
-		String last_cmd = null;
-
-		for (String arg : args) {
-			if (last_cmd != null) {
-				switch (last_cmd) {
-					case "--account":
-						val_account = arg;                          break;
-
-					case "--limit-messages":
-						val_limit_messages = Integer.parseInt(arg); break;
-
-					case "--target":
-						val_target = arg;                           break;
-
-					case "--export":
-						val_export = arg;                           break;
-
-					case "--test":
-						val_test = Integer.parseInt(arg);           break;
-				}
-				last_cmd = null;
-				continue;
-			}
-
-			switch (arg) {
-				case "-a": case "--account":
-					last_cmd = "--account";         continue;
-
-				case "-h": case "--help":
-					cmd_help = true;                break;
-
-				case "-l": case "--login":
-					cmd_login = true;               break;
-
-				case "--debug":
-					cmd_debug = true;               break;
-
-				case "--trace":
-				    cmd_trace = true;               break;
-
-				case "--trace-telegram":
-					cmd_trace_telegram = true;      break;
-
-				case "-A": case "--list-accounts":
-					cmd_list_accounts = true;       break;
-
-				case "--limit-messages":
-					last_cmd = arg;                 continue;
-
-				case "--console":
-					cmd_console = true;             break;
-
-				case "-t": case "--target":
-					last_cmd = "--target";          continue;
-
-				case "-V": case "--version":
-					cmd_version = true;             break;
-
-				case "-e": case "--export":
-					last_cmd = "--export";          continue;
-
-				case "--license":
-					cmd_license = true;             break;
-
-				case "-d": case "--daemon":
-					cmd_daemon = true;              break;
-
-				case "--no-media":
-					cmd_no_media = true;            break;
-
-				case "--test":
-					last_cmd = "--test";            continue;
-
-				case "--anonymize":
-					cmd_anonymize = true;           break;
-
-				case "--stats":
-					cmd_stats = true;               break;
-
-				case "--with-channels":
-					cmd_channels = true;            break;
-
-				case "--with-supergroups":
-					cmd_supergroups = true;         break;
-
-				default:
-					throw new RuntimeException("Unknown command " + arg);
-			}
-		}
-		if (last_cmd != null) {
-			CommandLineController.show_error("Command " + last_cmd + " had no parameter set.");
-		}
-	}
-}

src/main/kotlin/de/fabianonline/telegram_backup/CommandLineOptions.kt

@@ -0,0 +1,98 @@
+/* Telegram_Backup
+* Copyright (C) 2016 Fabian Schlenz
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. If not, see <http://www.gnu.org/licenses/>. */
+package de.fabianonline.telegram_backup
+internal object CommandLineOptions {
+  public var cmd_console = false
+  public var cmd_help = false
+  public var cmd_login = false
+  var cmd_debug = false
+  var cmd_trace = false
+  var cmd_trace_telegram = false
+  var cmd_list_accounts = false
+  var cmd_version = false
+  var cmd_license = false
+  var cmd_daemon = false
+  var cmd_no_media = false
+  var cmd_anonymize = false
+  var cmd_stats = false
+  var cmd_channels = false
+  var cmd_supergroups = false
+  var val_account:String? = null
+  var val_limit_messages:Int? = null
+  var val_target:String? = null
+  var val_export:String? = null
+  var val_test:Int? = null
+  @JvmStatic fun parseOptions(args:Array<String>) {
+    var last_cmd:String? = null
+    loop@ for (arg in args)
+    {
+      if (last_cmd != null)
+      {
+        when (last_cmd) {
+          "--account" -> val_account = arg
+          "--limit-messages" -> val_limit_messages = Integer.parseInt(arg)
+          "--target" -> val_target = arg
+          "--export" -> val_export = arg
+          "--test" -> val_test = Integer.parseInt(arg)
+        }
+        last_cmd = null
+        continue
+      }
+      when (arg) {
+        "-a", "--account" -> {
+          last_cmd = "--account"
+          continue@loop
+        }
+        "-h", "--help" -> cmd_help = true
+        "-l", "--login" -> cmd_login = true
+        "--debug" -> cmd_debug = true
+        "--trace" -> cmd_trace = true
+        "--trace-telegram" -> cmd_trace_telegram = true
+        "-A", "--list-accounts" -> cmd_list_accounts = true
+        "--limit-messages" -> {
+          last_cmd = arg
+          continue@loop
+        }
+        "--console" -> cmd_console = true
+        "-t", "--target" -> {
+          last_cmd = "--target"
+          continue@loop
+        }
+        "-V", "--version" -> cmd_version = true
+        "-e", "--export" -> {
+          last_cmd = "--export"
+          continue@loop
+        }
+        "--license" -> cmd_license = true
+        "-d", "--daemon" -> cmd_daemon = true
+        "--no-media" -> cmd_no_media = true
+        "--test" -> {
+          last_cmd = "--test"
+          continue@loop
+        }
+        "--anonymize" -> cmd_anonymize = true
+        "--stats" -> cmd_stats = true
+        "--with-channels" -> cmd_channels = true
+        "--with-supergroups" -> cmd_supergroups = true
+        else -> throw RuntimeException("Unknown command " + arg)
+      }
+    }
+    if (last_cmd != null)
+    {
+      CommandLineController.show_error("Command " + last_cmd + " had no parameter set.")
+    }
+  }
+}