Add PlaceholderAPI expansion

bukkit/src/main/kotlin/com/r4g3baby/simplescore/bukkit/BukkitManager.kt

@@ -5,6 +5,7 @@ import com.r4g3baby.simplescore.api.scoreboard.Scoreboard
 import com.r4g3baby.simplescore.api.scoreboard.data.Priority
 import com.r4g3baby.simplescore.bukkit.command.MainCmd
 import com.r4g3baby.simplescore.bukkit.config.MainConfig
+import com.r4g3baby.simplescore.bukkit.hooks.PapiExpansion
 import com.r4g3baby.simplescore.bukkit.listener.PlayerListener
 import com.r4g3baby.simplescore.bukkit.protocol.legacy.LegacyProtocolHandler
 import com.r4g3baby.simplescore.bukkit.protocol.modern.ModernProtocolHandler
@@ -38,6 +39,10 @@ class BukkitManager(private val plugin: BukkitPlugin) : BaseManager<Player, Yaml
         plugin.getCommand(plugin.name)?.executor = MainCmd(plugin)
         plugin.server.pluginManager.registerEvents(PlayerListener(this), plugin)
 
+        if (varReplacer.usePlaceholderAPI) {
+            PapiExpansion(plugin).register()
+        }
+
         if (config.scoreboardTaskAsync) plugin.scheduler.runTaskTimerAsync(
             20L, config.taskUpdateTime, ScoreboardTask(this, protocolHandler)
         ) else plugin.scheduler.runTaskTimer(

bukkit/src/main/kotlin/com/r4g3baby/simplescore/bukkit/hooks/PapiExpansion.kt

@@ -0,0 +1,34 @@
+package com.r4g3baby.simplescore.bukkit.hooks
+
+import com.r4g3baby.simplescore.BukkitPlugin
+import me.clip.placeholderapi.expansion.PlaceholderExpansion
+import org.bukkit.entity.Player
+
+class PapiExpansion(private val plugin: BukkitPlugin) : PlaceholderExpansion() {
+    override fun getIdentifier(): String {
+        return plugin.description.name
+    }
+
+    override fun getAuthor(): String {
+        return plugin.description.authors[0]
+    }
+
+    override fun getVersion(): String {
+        return plugin.description.version
+    }
+
+    override fun persist(): Boolean {
+        return true
+    }
+
+    override fun onPlaceholderRequest(player: Player?, params: String): String? {
+        if (player == null) return null
+        val viewer = plugin.manager.getViewer(player.uniqueId) ?: return null
+
+        return when {
+            params.equals("scoreboard", true) -> viewer.scoreboard?.name ?: "none"
+            params.equals("isHidden", true) -> viewer.isScoreboardHidden.toString()
+            else -> null
+        }
+    }
+}

bukkit/src/main/kotlin/com/r4g3baby/simplescore/bukkit/scoreboard/VarReplacer.kt

@@ -14,7 +14,7 @@ import kotlin.math.min
 import kotlin.math.roundToInt
 
 class VarReplacer(plugin: BukkitPlugin) : VarReplacer<Player> {
-    private val usePlaceholderAPI = plugin.server.pluginManager.getPlugin("PlaceholderAPI") != null
+    internal val usePlaceholderAPI = plugin.server.pluginManager.getPlugin("PlaceholderAPI") != null
 
     override fun replace(text: String, viewer: Player): String {
         var result = if (usePlaceholderAPI) PlaceholderAPI.setPlaceholders(viewer, text) else text