Added generation list task

src/main/kotlin/net/trivernis/chunkmaster/Chunkmaster.kt

@@ -1,6 +1,7 @@
 package net.trivernis.chunkmaster
 
 import net.trivernis.chunkmaster.commands.CommandGenerate
+import net.trivernis.chunkmaster.commands.CommandListGenTasks
 import net.trivernis.chunkmaster.lib.GenerationManager
 import net.trivernis.chunkmaster.lib.Spiral
 import org.bukkit.plugin.java.JavaPlugin
@@ -20,6 +21,7 @@ class Chunkmaster: JavaPlugin() {
         generationManager = GenerationManager(this, server)
         generationManager.init()
         getCommand("generate")?.setExecutor(CommandGenerate(this))
+        getCommand("listgentasks")?.setExecutor(CommandListGenTasks(this))
         server.pluginManager.registerEvents(ChunkmasterEvents(this, server), this)
     }
 

src/main/kotlin/net/trivernis/chunkmaster/ChunkmasterEvents.kt

@@ -11,7 +11,8 @@ class ChunkmasterEvents(private val chunkmaster: Chunkmaster, private val server
      * Autostart generation tasks
      */
     fun onPlayerQuit(event: PlayerQuitEvent) {
-        if (server.onlinePlayers.size == 1 && server.onlinePlayers.contains(event.player)) {
+        if (server.onlinePlayers.size == 1 && server.onlinePlayers.contains(event.player) ||
+                server.onlinePlayers.isEmpty()) {
             chunkmaster.generationManager.startAll()
             chunkmaster.logger.info("Server is empty. Starting chunk generation tasks.")
         }

src/main/kotlin/net/trivernis/chunkmaster/commands/CommandListGenTasks.kt

@@ -0,0 +1,24 @@
+package net.trivernis.chunkmaster.commands
+
+import net.md_5.bungee.api.ChatColor
+import net.md_5.bungee.api.chat.ComponentBuilder
+import net.trivernis.chunkmaster.Chunkmaster
+import org.bukkit.command.Command
+import org.bukkit.command.CommandExecutor
+import org.bukkit.command.CommandSender
+
+class CommandListGenTasks(private val chunkmaster: Chunkmaster): CommandExecutor {
+    /**
+     * Responds with a list of running generation tasks.
+     */
+    override fun onCommand(sender: CommandSender, command: Command, label: String, args: Array<out String>): Boolean {
+        val runningTasks = chunkmaster.generationManager.tasks
+        val response = ComponentBuilder("Currently running generation tasks").color(ChatColor.BLUE)
+        for (task in runningTasks) {
+            response.append("\n - #${task.id}: ${task.generationTask.world}, Progress ${task.generationTask.count}")
+        }
+        response.color(ChatColor.GREEN)
+        sender.spigot().sendMessage(*response.create())
+        return true
+    }
+}

src/main/kotlin/net/trivernis/chunkmaster/lib/GenerationManager.kt

@@ -11,7 +11,8 @@ import java.lang.NullPointerException
 
 class GenerationManager(private val chunkmaster: Chunkmaster, private val server: Server) {
 
-    private val tasks: HashSet<TaskEntry> = HashSet()
+    val tasks: HashSet<TaskEntry> = HashSet()
+        get() = field
 
     /**
      * Adds a generation task
@@ -60,7 +61,9 @@ class GenerationManager(private val chunkmaster: Chunkmaster, private val server
     fun init() {
         chunkmaster.logger.info("Creating task to load chunk generation Tasks later...")
         server.scheduler.runTaskLater(chunkmaster, Runnable {
-            startAll()     // run startAll after 10 seconds
+            if (server.onlinePlayers.isEmpty()) {
+                startAll()     // run startAll after 10 seconds if empty
+            }
         }, 200)
     }
 

src/main/resources/plugin.yml

@@ -10,12 +10,20 @@ commands:
     description: Generates chunks starting from the world spawnpoint
     permission: chumkmaster.generate
     usage: /generate [world]
+  listgentasks:
+    description: Lists all generation tasks
+    permission: chunkmaster.listgentasks
+    usage: /listgentasks
 permissions:
   cunkmaster.generate:
     description: Allows generate command
     default: op
+  chunkmaster.listgentasks:
+    description: Lists all generation tasks
+    default: op
   chunkmaster.*:
     description: Wildcard permission
     default: op
     children:
       - chunkmaster.generate
+      - chunkmaster.listgentasks