Migrate to Scala

lib/build.gradle.kts

@@ -1,8 +1,8 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
-    kotlin("jvm") version "1.4.10"
+    // Apply the scala Plugin to add support for Scala.
+    scala
 
+    // Apply the java-library plugin for API and implementation separation.
     `java-library`
 }
 
@@ -10,15 +10,27 @@ group = "com.tribufu.sdk"
 version = "0.0.1"
 
 repositories {
+    // Use Maven Central for resolving dependencies.
     mavenCentral()
 }
 
 dependencies {
-    testImplementation(kotlin("test-junit"))
-}
+    // Use Scala 2.13 in our library project
+    implementation("org.scala-lang:scala-library:2.13.3")
 
-tasks.test {
-    useJUnit()
+    // This dependency is used internally, and not exposed to consumers on their own compile classpath.
+    implementation("com.google.guava:guava:30.0-jre")
+
+    // Use Scalatest for testing our library
+    testImplementation("junit:junit:4.13.1")
+    testImplementation("org.scalatest:scalatest_2.13:3.2.3")
+    testImplementation("org.scalatestplus:junit-4-13_2.13:3.2.2.0")
+
+    // Need scala-xml at test runtime
+    testRuntimeOnly("org.scala-lang.modules:scala-xml_2.13:1.2.0")
+
+    // This dependency is exported to consumers, that is to say found on their compile classpath.
+    api("org.apache.commons:commons-math3:3.6.1")
 }
 
 tasks.jar {
@@ -26,7 +38,3 @@ tasks.jar {
         attributes(mapOf("Implementation-Title" to project.name, "Implementation-Version" to project.version))
     }
 }
-
-tasks.withType<KotlinCompile>() {
-    kotlinOptions.jvmTarget = "1.8"
-}

lib/src/main/kotlin/com/tribufu/sdk/models/User.kt

@@ -1,65 +0,0 @@
-// Copyright (c) TribuFu. All Rights Reserved
-
-package com.tribufu.sdk.models
-
-class User {
-    var id = ""
-    var name = ""
-    var display_name = ""
-    var password_hash = ""
-    var role = Role.User
-    var confirmed = false
-    var two_factor_enabled = false
-    var first_name = ""
-    var last_name = ""
-    var verified = false
-    var parental_control = false
-    var profile_url = ""
-    var public_birthday = false
-    var Birthday = ""
-    var location = ""
-    var timezone = ""
-    var language = ""
-    var currency = ""
-    var theme = Theme.Light
-    var ip_address = ""
-    var registration_ip_address = ""
-    var Joined = ""
-    var Updated = ""
-    var failed_logins = 0
-    var about = ""
-    var profile_views = 0
-    var content = 0
-    var avatar_url = ""
-    var background_url = ""
-    var status = Status.Offline
-    var LastOnline = ""
-    var LastActivity = ""
-    var LastPost = ""
-    var warnings = 0
-    var LastWarn = ""
-}
-
-enum class Role {
-    User,
-    Bot,
-    Helper,
-    Tester,
-    Developer,
-    Moderator,
-    Admin,
-    Root
-}
-
-enum class Theme {
-    Light,
-    Dark
-}
-
-enum class Status {
-    Offline,
-    Away,
-    Disturb,
-    Online,
-    Playing
-}

lib/src/main/scala/TribuFu.scala

@@ -3,13 +3,15 @@
 package com.tribufu.sdk
 
 class TribuFu {
+    Init()
+
+    // Used to load the 'TribuFu' library on application startup.
+    private def Init() {
+        System.loadLibrary("TribuFu_jvm")
+    }
+
     /**
      * A native method that is implemented by the 'TribuFu' native library.
      */
-    external fun Hello(input: String): String
-
-    // Used to load the 'TribuFu' library on application startup.
-    init {
-        System.loadLibrary("TribuFu_jvm")
-    }
+    @native def Hello(input: String): String
 }

lib/src/main/scala/models/Email.scala

@@ -3,8 +3,8 @@
 package com.tribufu.sdk.models
 
 class Email {
-    var address = ""
-    var user_id = "1"
-    var confirmed = false
-    var primary = true
+    val address = ""
+    val user_id = "1"
+    val confirmed = false
+    val primary = true
 }

lib/src/main/scala/models/User.scala

@@ -0,0 +1,53 @@
+// Copyright (c) TribuFu. All Rights Reserved
+
+package com.tribufu.sdk.models
+
+class User {
+    val id = ""
+    val name = ""
+    val display_name = ""
+    val password_hash = ""
+    val role = Role.User
+    val confirmed = false
+    val two_factor_enabled = false
+    val first_name = ""
+    val last_name = ""
+    val verified = false
+    val parental_control = false
+    val profile_url = ""
+    val public_birthday = false
+    val Birthday = ""
+    val location = ""
+    val timezone = ""
+    val language = ""
+    val currency = ""
+    val theme = Theme.Light
+    val ip_address = ""
+    val registration_ip_address = ""
+    val Joined = ""
+    val Updated = ""
+    val failed_logins = 0
+    val about = ""
+    val profile_views = 0
+    val content = 0
+    val avatar_url = ""
+    val background_url = ""
+    val status = Status.Offline
+    val LastOnline = ""
+    val LastActivity = ""
+    val LastPost = ""
+    val warnings = 0
+    val LastWarn = ""
+}
+
+object Role extends Enumeration {
+    val User, Bot, Helper, Tester, Developer, Moderator, Admin, Root = Value
+}
+
+object Theme extends Enumeration {
+    val Light, Dark = Value
+}
+
+object Status extends Enumeration {
+    val Offline, Away, Disturb, Online, Playing = Value
+}

lib/src/test/scala/com/tribufu/sdk/TribuFuSuite.scala

@@ -0,0 +1,16 @@
+// Copyright (c) TribuFu. All Rights Reserved
+
+package com.tribufu.sdk
+
+import org.junit.runner.RunWith
+import org.scalatest.funsuite.AnyFunSuite
+import org.scalatestplus.junit.JUnitRunner
+
+@RunWith(classOf[JUnitRunner])
+class TribuFuSuite extends AnyFunSuite {
+    test("Hello is always true") {
+        //def library = new TribuFu()
+        //assert(library.Hello())
+        assert(true)
+    }
+}