Major refactoring to use Koin.

build.gradle.kts

@@ -82,6 +82,9 @@ subprojects {
     implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
 
+    implementation("io.insert-koin:koin-core:3.1.4")
+    testImplementation("io.insert-koin:koin-test:3.1.4")
+
     // Serialization
     implementation("com.charleskorn.kaml:kaml:0.38.0")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.1")

foundation-core/build.gradle.kts

@@ -1,3 +1,5 @@
 dependencies {
   // TODO: might be able to ship all dependencies in core? are we duplicating classes in JARs?
+
+  implementation("software.amazon.awssdk:s3:2.17.102")
 }

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/FoundationCorePlugin.kt

@@ -1,27 +1,27 @@
 package cloud.kubelet.foundation.core
 
-import cloud.kubelet.foundation.core.command.*
-import cloud.kubelet.foundation.core.devupdate.DevUpdateServer
-import cloud.kubelet.foundation.core.persist.PersistentStore
-import cloud.kubelet.foundation.core.persist.setAllProperties
-import io.papermc.paper.event.player.AsyncChatEvent
-import net.kyori.adventure.text.Component
-import net.kyori.adventure.text.TextComponent
-import org.bukkit.GameMode
-import org.bukkit.command.CommandExecutor
-import org.bukkit.command.TabCompleter
-import org.bukkit.event.EventHandler
-import org.bukkit.event.Listener
-import org.bukkit.plugin.java.JavaPlugin
+import cloud.kubelet.foundation.core.abstraction.Feature
+import cloud.kubelet.foundation.core.abstraction.FoundationPlugin
+import cloud.kubelet.foundation.core.features.backup.BackupFeature
+import cloud.kubelet.foundation.core.features.dev.DevFeature
+import cloud.kubelet.foundation.core.features.player.PlayerFeature
+import cloud.kubelet.foundation.core.features.stats.StatsFeature
+import cloud.kubelet.foundation.core.features.update.UpdateFeature
+import cloud.kubelet.foundation.core.features.world.WorldFeature
+import org.koin.dsl.module
 import java.nio.file.Path
-import java.time.Instant
-import java.util.concurrent.ConcurrentHashMap
 
-class FoundationCorePlugin : JavaPlugin(), Listener {
-  internal val persistentStores = ConcurrentHashMap<String, PersistentStore>()
+class FoundationCorePlugin : FoundationPlugin() {
   private lateinit var _pluginDataPath: Path
-  private lateinit var chatLogStore: PersistentStore
-  private lateinit var devUpdateServer: DevUpdateServer
+  override val features: List<Feature>
+    get() = listOf(
+      BackupFeature(),
+      DevFeature(),
+      PlayerFeature(),
+      StatsFeature(),
+      UpdateFeature(),
+      WorldFeature(),
+    )
 
   var pluginDataPath: Path
     /**
@@ -38,104 +38,15 @@ class FoundationCorePlugin : JavaPlugin(), Listener {
       _pluginDataPath = value
     }
 
-  /**
-   * Fetch a persistent store by name. Make sure the name is path-safe, descriptive and consistent across server runs.
-   */
-  fun getPersistentStore(name: String) = persistentStores.getOrPut(name) { PersistentStore(this, name) }
+  override fun module() = module {
+    single { this@FoundationCorePlugin }
+  }
 
   override fun onEnable() {
+    // Create core plugin directory.
     pluginDataPath = dataFolder.toPath()
-    val backupPath = pluginDataPath.resolve(BACKUPS_DIRECTORY)
-
-    // Create Foundation plugin directories.
     pluginDataPath.toFile().mkdir()
-    backupPath.toFile().mkdir()
 
-    // Register this as an event listener.
-    server.pluginManager.registerEvents(this, this)
-
-    // Register commands.
-    registerCommandExecutor("fbackup", BackupCommand(this, backupPath))
-    registerCommandExecutor("fupdate", UpdateCommand())
-    registerCommandExecutor(listOf("survival", "s"), GamemodeCommand(GameMode.SURVIVAL))
-    registerCommandExecutor(listOf("creative", "c"), GamemodeCommand(GameMode.CREATIVE))
-    registerCommandExecutor(listOf("adventure", "a"), GamemodeCommand(GameMode.ADVENTURE))
-    registerCommandExecutor(listOf("spectator", "sp"), GamemodeCommand(GameMode.SPECTATOR))
-    registerCommandExecutor(listOf("leaderboard", "lb"), LeaderboardCommand())
-    registerCommandExecutor("pstore", PersistentStoreCommand(this))
-    registerCommandExecutor("setspawn", SetSpawnCommand())
-    registerCommandExecutor("spawn", SpawnCommand())
-
-    val log = slF4JLogger
-    log.info("Features:")
-    Util.printFeatureStatus(log, "Backup", BACKUP_ENABLED)
-    chatLogStore = getPersistentStore("chat-logs")
-    devUpdateServer = DevUpdateServer(this)
-    devUpdateServer.enable()
-  }
-
-  override fun onDisable() {
-    persistentStores.values.forEach { store -> store.close() }
-    persistentStores.clear()
-    devUpdateServer.disable()
-  }
-
-  private fun registerCommandExecutor(name: String, executor: CommandExecutor) {
-    registerCommandExecutor(listOf(name), executor)
-  }
-
-  private fun registerCommandExecutor(names: List<String>, executor: CommandExecutor) {
-    for (name in names) {
-      val command = getCommand(name) ?: throw Exception("Failed to get $name command")
-      command.setExecutor(executor)
-      if (executor is TabCompleter) {
-        command.tabCompleter = executor
-      }
-    }
-  }
-
-  // TODO: Disabling chat reformatting until I do something with it and figure out how to make it
-  //  be less disruptive.
-  /*@EventHandler
-  private fun onChatMessage(e: ChatEvent) {
-    return
-    e.isCancelled = true
-    val name = e.player.displayName()
-    val component = Component.empty()
-      .append(leftBracket)
-      .append(name)
-      .append(rightBracket)
-      .append(Component.text(' '))
-      .append(e.message())
-    server.sendMessage(component)
-  }*/
-
-  @EventHandler
-  private fun logOnChatMessage(e: AsyncChatEvent) {
-    val player = e.player
-    val message = e.message()
-
-    if (message !is TextComponent) {
-      return
-    }
-
-    val content = message.content()
-    chatLogStore.create("ChatMessageEvent") {
-      setAllProperties(
-        "timestamp" to Instant.now().toEpochMilli(),
-        "player.id" to player.identity().uuid().toString(),
-        "player.name" to player.name,
-        "message.content" to content
-      )
-    }
-  }
-
-  companion object {
-    private const val BACKUPS_DIRECTORY = "backups"
-
-    private val leftBracket: Component = Component.text('[')
-    private val rightBracket: Component = Component.text(']')
-
-    const val BACKUP_ENABLED = true
+    super.onEnable()
   }
 }

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/Util.kt

@@ -11,10 +11,6 @@ object Util {
   private val whitespace: Component = Component.text(' ')
   private val foundationName: Component = Component.text("Foundation")
 
-  fun printFeatureStatus(logger: Logger, feature: String?, state: Boolean) {
-    logger.info("{}: {}", feature, if (state) "Enabled" else "Disabled")
-  }
-
   fun formatSystemMessage(message: String): Component {
     return formatSystemMessage(TextColors.AMARANTH_PINK, message)
   }

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/abstraction/Feature.kt

@@ -0,0 +1,31 @@
+package cloud.kubelet.foundation.core.abstraction
+
+import cloud.kubelet.foundation.core.FoundationCorePlugin
+import org.bukkit.command.CommandExecutor
+import org.bukkit.command.TabCompleter
+import org.bukkit.event.Listener
+import org.koin.core.component.KoinComponent
+import org.koin.core.component.inject
+import org.koin.dsl.module
+
+abstract class Feature : KoinComponent, Listener {
+  private val plugin by inject<FoundationCorePlugin>()
+
+  open fun enable() {}
+  open fun disable() {}
+  open fun module() = module {}
+
+  protected fun registerCommandExecutor(name: String, executor: CommandExecutor) {
+    registerCommandExecutor(listOf(name), executor)
+  }
+
+  protected fun registerCommandExecutor(names: List<String>, executor: CommandExecutor) {
+    for (name in names) {
+      val command = plugin.getCommand(name) ?: throw Exception("Failed to get $name command")
+      command.setExecutor(executor)
+      if (executor is TabCompleter) {
+        command.tabCompleter = executor
+      }
+    }
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/abstraction/FoundationPlugin.kt

@@ -0,0 +1,54 @@
+package cloud.kubelet.foundation.core.abstraction
+
+import org.bukkit.plugin.java.JavaPlugin
+import org.koin.core.KoinApplication
+import org.koin.core.context.startKoin
+import org.koin.core.context.stopKoin
+import org.koin.core.module.Module
+import org.koin.dsl.module
+
+abstract class FoundationPlugin : JavaPlugin() {
+  private lateinit var pluginModule: Module
+  private lateinit var pluginApplication: KoinApplication
+  protected abstract val features: List<Feature>
+
+  override fun onEnable() {
+    pluginModule = module {
+      single { this@FoundationPlugin }
+      single { server }
+      single { config }
+      single { slF4JLogger }
+    }
+
+    // TODO: If we have another plugin using this class, we may need to use context isolation.
+    //  https://insert-koin.io/docs/reference/koin-core/context-isolation
+    pluginApplication = startKoin {
+      modules(pluginModule)
+      modules(module())
+    }
+
+    features.forEach {
+      pluginApplication.modules(it.module())
+    }
+
+    features.forEach {
+      try {
+        slF4JLogger.info("Enabling feature: ${it.javaClass.simpleName}")
+        it.enable()
+        server.pluginManager.registerEvents(it, this)
+      } catch (e: Exception) {
+        slF4JLogger.error("Failed to enable feature: ${it.javaClass.simpleName}", e)
+      }
+    }
+  }
+
+  override fun onDisable() {
+    features.forEach {
+      it.disable()
+    }
+
+    stopKoin()
+  }
+
+  protected open fun module() = module {}
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/backup/BackupCommand.kt

@@ -1,4 +1,4 @@
-package cloud.kubelet.foundation.core.command
+package cloud.kubelet.foundation.core.features.backup
 
 import cloud.kubelet.foundation.core.FoundationCorePlugin
 import cloud.kubelet.foundation.core.Util
@@ -26,15 +26,6 @@ class BackupCommand(
   override fun onCommand(
     sender: CommandSender, command: Command, label: String, args: Array<String>
   ): Boolean {
-    if (!FoundationCorePlugin.BACKUP_ENABLED) {
-      sender.sendMessage(
-        Component
-          .text("Backup is not enabled.")
-          .color(TextColor.fromHexString("#FF0000"))
-      )
-      return true
-    }
-
     if (RUNNING.get()) {
       sender.sendMessage(
         Component

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/backup/BackupFeature.kt

@@ -0,0 +1,21 @@
+package cloud.kubelet.foundation.core.features.backup
+
+import cloud.kubelet.foundation.core.FoundationCorePlugin
+import cloud.kubelet.foundation.core.abstraction.Feature
+import org.koin.core.component.inject
+
+class BackupFeature : Feature() {
+  private val plugin by inject<FoundationCorePlugin>()
+
+  override fun enable() {
+    // Create backup directory.
+    val backupPath = plugin.pluginDataPath.resolve(BACKUPS_DIRECTORY)
+    backupPath.toFile().mkdir()
+
+    registerCommandExecutor("fbackup", BackupCommand(plugin, backupPath))
+  }
+
+  companion object {
+    private const val BACKUPS_DIRECTORY = "backups"
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/dev/DevFeature.kt

@@ -0,0 +1,20 @@
+package cloud.kubelet.foundation.core.features.dev
+
+import cloud.kubelet.foundation.core.FoundationCorePlugin
+import cloud.kubelet.foundation.core.abstraction.Feature
+import cloud.kubelet.foundation.core.devupdate.DevUpdateServer
+import org.koin.core.component.inject
+
+class DevFeature : Feature() {
+  private val plugin = inject<FoundationCorePlugin>()
+  private lateinit var devUpdateServer: DevUpdateServer
+
+  override fun enable() {
+    devUpdateServer = DevUpdateServer(plugin.value)
+    devUpdateServer.enable()
+  }
+
+  override fun disable() {
+    devUpdateServer.disable()
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/player/PlayerFeature.kt

@@ -0,0 +1,14 @@
+package cloud.kubelet.foundation.core.features.player
+
+import cloud.kubelet.foundation.core.abstraction.Feature
+import cloud.kubelet.foundation.core.command.GamemodeCommand
+import org.bukkit.GameMode
+
+class PlayerFeature : Feature() {
+  override fun enable() {
+    registerCommandExecutor(listOf("survival", "s"), GamemodeCommand(GameMode.SURVIVAL))
+    registerCommandExecutor(listOf("creative", "c"), GamemodeCommand(GameMode.CREATIVE))
+    registerCommandExecutor(listOf("adventure", "a"), GamemodeCommand(GameMode.ADVENTURE))
+    registerCommandExecutor(listOf("spectator", "sp"), GamemodeCommand(GameMode.SPECTATOR))
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/stats/LeaderboardCommand.kt

@@ -1,4 +1,4 @@
-package cloud.kubelet.foundation.core.command
+package cloud.kubelet.foundation.core.features.stats
 
 import cloud.kubelet.foundation.core.SortOrder
 import cloud.kubelet.foundation.core.allPlayerStatisticsOf

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/stats/PersistentStoreCommand.kt

@@ -1,15 +1,21 @@
-package cloud.kubelet.foundation.core.command
+package cloud.kubelet.foundation.core.features.stats
 
-import cloud.kubelet.foundation.core.FoundationCorePlugin
 import org.bukkit.command.Command
 import org.bukkit.command.CommandExecutor
 import org.bukkit.command.CommandSender
 import org.bukkit.command.TabCompleter
 
-class PersistentStoreCommand(private val plugin: FoundationCorePlugin) : CommandExecutor, TabCompleter {
+class PersistentStoreCommand(
+  private val statsFeature: StatsFeature
+) : CommandExecutor, TabCompleter {
   private val allSubCommands = mutableListOf("stats", "sample", "delete-all-entities")
 
-  override fun onCommand(sender: CommandSender, command: Command, label: String, args: Array<out String>): Boolean {
+  override fun onCommand(
+    sender: CommandSender,
+    command: Command,
+    label: String,
+    args: Array<out String>
+  ): Boolean {
     if (args.isEmpty()) {
       sender.sendMessage("Invalid Command Usage.")
       return true
@@ -17,7 +23,7 @@ class PersistentStoreCommand(private val plugin: FoundationCorePlugin) : Command
 
     when (args[0]) {
       "stats" -> {
-        plugin.persistentStores.forEach { (name, store) ->
+        statsFeature.persistentStores.forEach { (name, store) ->
           val counts = store.transact {
             entityTypes.associateWith { type -> getAll(type).size() }.toSortedMap()
           }
@@ -36,7 +42,7 @@ class PersistentStoreCommand(private val plugin: FoundationCorePlugin) : Command
 
         val storeName = args[1]
         val entityTypeName = args[2]
-        val store = plugin.getPersistentStore(storeName)
+        val store = statsFeature.getPersistentStore(storeName)
         store.transact {
           val entities = getAll(entityTypeName).take(3)
           for (entity in entities) {
@@ -55,7 +61,7 @@ class PersistentStoreCommand(private val plugin: FoundationCorePlugin) : Command
 
         val storeName = args[1]
         val entityTypeName = args[2]
-        val store = plugin.getPersistentStore(storeName)
+        val store = statsFeature.getPersistentStore(storeName)
         store.transact {
           store.deleteAllEntities(entityTypeName)
         }

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/stats/StatsFeature.kt

@@ -0,0 +1,56 @@
+package cloud.kubelet.foundation.core.features.stats
+
+import cloud.kubelet.foundation.core.FoundationCorePlugin
+import cloud.kubelet.foundation.core.abstraction.Feature
+import cloud.kubelet.foundation.core.persist.PersistentStore
+import cloud.kubelet.foundation.core.persist.setAllProperties
+import io.papermc.paper.event.player.AsyncChatEvent
+import net.kyori.adventure.text.TextComponent
+import org.bukkit.event.EventHandler
+import org.koin.core.component.inject
+import java.time.Instant
+import java.util.concurrent.ConcurrentHashMap
+
+class StatsFeature : Feature() {
+  private val plugin = inject<FoundationCorePlugin>()
+  private lateinit var chatLogStore: PersistentStore
+  // TODO: Move persistence stuff to its own module.
+  internal val persistentStores = ConcurrentHashMap<String, PersistentStore>()
+
+  override fun enable() {
+    chatLogStore = getPersistentStore("chat-logs")
+
+    registerCommandExecutor("pstore", PersistentStoreCommand(this))
+  }
+
+  override fun disable() {
+    persistentStores.values.forEach { store -> store.close() }
+    persistentStores.clear()
+  }
+
+  /**
+   * Fetch a persistent store by name. Make sure the name is path-safe, descriptive and consistent across server runs.
+   */
+  fun getPersistentStore(name: String) =
+    persistentStores.getOrPut(name) { PersistentStore(plugin.value, name) }
+
+  @EventHandler
+  private fun logOnChatMessage(e: AsyncChatEvent) {
+    val player = e.player
+    val message = e.message()
+
+    if (message !is TextComponent) {
+      return
+    }
+
+    val content = message.content()
+    chatLogStore.create("ChatMessageEvent") {
+      setAllProperties(
+        "timestamp" to Instant.now().toEpochMilli(),
+        "player.id" to player.identity().uuid().toString(),
+        "player.name" to player.name,
+        "message.content" to content
+      )
+    }
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/update/ModuleManifest.kt

@@ -1,4 +1,4 @@
-package cloud.kubelet.foundation.core.update
+package cloud.kubelet.foundation.core.features.update
 
 import kotlinx.serialization.Serializable
 

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/update/UpdateCommand.kt

@@ -1,6 +1,5 @@
-package cloud.kubelet.foundation.core.command
+package cloud.kubelet.foundation.core.features.update
 
-import cloud.kubelet.foundation.core.service.UpdateService
 import org.bukkit.command.Command
 import org.bukkit.command.CommandExecutor
 import org.bukkit.command.CommandSender
@@ -15,4 +14,4 @@ class UpdateCommand : CommandExecutor {
     UpdateService.updatePlugins(sender)
     return true
   }
-}
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/update/UpdateFeature.kt

@@ -0,0 +1,9 @@
+package cloud.kubelet.foundation.core.features.update
+
+import cloud.kubelet.foundation.core.abstraction.Feature
+
+class UpdateFeature : Feature() {
+  override fun enable() {
+    registerCommandExecutor("fupdate", UpdateCommand())
+  }
+}

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/update/UpdateService.kt

@@ -1,11 +1,10 @@
-package cloud.kubelet.foundation.core.service
+package cloud.kubelet.foundation.core.features.update
 
-import cloud.kubelet.foundation.core.update.UpdateUtil
 import org.bukkit.command.CommandSender
 import kotlin.io.path.name
 import kotlin.io.path.toPath
 
-// TODO: Switch to classes and use dependency injection with koin.
+// TODO: Switch to a class and use dependency injection with koin.
 object UpdateService {
   fun updatePlugins(sender: CommandSender, onFinish: (() -> Unit)? = null) {
     val updateDir = sender.server.pluginsFolder.resolve("update")

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/update/UpdateUtil.kt

@@ -1,4 +1,4 @@
-package cloud.kubelet.foundation.core.update
+package cloud.kubelet.foundation.core.features.update
 
 import kotlinx.serialization.DeserializationStrategy
 import kotlinx.serialization.builtins.MapSerializer

foundation-core/src/main/kotlin/cloud/kubelet/foundation/core/features/world/WorldFeature.kt

@@ -0,0 +1,14 @@
+package cloud.kubelet.foundation.core.features.world
+
+import cloud.kubelet.foundation.core.abstraction.Feature
+import cloud.kubelet.foundation.core.command.GamemodeCommand
+import cloud.kubelet.foundation.core.command.SetSpawnCommand
+import cloud.kubelet.foundation.core.command.SpawnCommand
+import org.bukkit.GameMode
+
+class WorldFeature : Feature() {
+  override fun enable() {
+    registerCommandExecutor("setspawn", SetSpawnCommand())
+    registerCommandExecutor("spawn", SpawnCommand())
+  }
+}