Waila Placeholders

build.gradle.kts

@@ -20,6 +20,9 @@ allprojects {
         maven("https://repo.codemc.io/repository/maven-releases/") {
             name = "CodeMC"
         }
+        maven("https://repo.extendedclip.com/releases/") {
+            name = "PlaceholderAPI"
+        }
     }
 }
 

rebar/build.gradle.kts

@@ -1,4 +1,5 @@
 import net.minecrell.pluginyml.bukkit.BukkitPluginDescription
+import net.minecrell.pluginyml.paper.PaperPluginDescription
 import org.jetbrains.kotlin.gradle.dsl.JvmDefaultMode
 
 plugins {
@@ -41,6 +42,7 @@ dependencies {
 
     paperLibraryApi("xyz.xenondevs.invui:invui:2.0.0-beta.5")
     paperLibraryApi("xyz.xenondevs.invui:invui-kotlin:2.0.0-beta.5")
+    compileOnly("me.clip:placeholderapi:2.12.2")
     implementation("com.github.Tofaa2.EntityLib:spigot:2.4.11")
     implementation("com.github.retrooper:packetevents-spigot:2.11.2")
     implementation("info.debatty:java-string-similarity:2.0.0")
@@ -163,6 +165,13 @@ paper {
     authors = listOf("Rebar team")
     apiVersion = minecraftVersion
     load = BukkitPluginDescription.PluginLoadOrder.STARTUP
+
+    serverDependencies {
+        register("PlaceholderAPI") {
+            load = PaperPluginDescription.RelativeLoadOrder.BEFORE
+            required = false
+        }
+    }
 }
 
 tasks.withType<Jar> {

rebar/src/main/kotlin/io/github/pylonmc/rebar/Rebar.kt

@@ -47,6 +47,7 @@ import io.github.pylonmc.rebar.resourcepack.armor.ArmorTextureEngine
 import io.github.pylonmc.rebar.util.delayTicks
 import io.github.pylonmc.rebar.util.mergeGlobalConfig
 import io.github.pylonmc.rebar.waila.Waila
+import io.github.pylonmc.rebar.waila.WailaPlaceholders
 import io.github.retrooper.packetevents.factory.spigot.SpigotPacketEventsBuilder
 import io.papermc.paper.ServerBuildInfo
 import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents
@@ -258,6 +259,9 @@ object Rebar : JavaPlugin(), RebarAddon {
 
         if (RebarConfig.WailaConfig.ENABLED) {
             pm.registerEvents(Waila, this)
+            if (pm.getPlugin("PlaceholderAPI") != null) {
+                WailaPlaceholders.register()
+            }
         }
 
         if (RebarConfig.ArmorTextureConfig.ENABLED) {

rebar/src/main/kotlin/io/github/pylonmc/rebar/waila/Waila.kt

@@ -58,23 +58,32 @@ class Waila private constructor(private val player: Player, playerConfig: Player
         RebarConfig.WailaConfig.DEFAULT_DISPLAY.overlay
     )
 
+    var lastText: Component? = null
+        private set
+    var lastColor: BossBar.Color? = null
+        private set
+    var lastOverlay: BossBar.Overlay? = null
+        private set
+    var lastProgress: Float? = null
+        private set
+
     private var wasVisible = false;
 
     private fun send(display: WailaDisplay) {
+        val color = if (display.color in RebarConfig.WailaConfig.ALLOWED_BOSS_BAR_COLORS) {
+            display.color
+        } else {
+            RebarConfig.WailaConfig.DEFAULT_DISPLAY.color
+        }
+        val overlay = if (display.overlay in RebarConfig.WailaConfig.ALLOWED_BOSS_BAR_OVERLAYS) {
+            display.overlay
+        } else {
+            RebarConfig.WailaConfig.DEFAULT_DISPLAY.overlay
+        }
+
         when (config.type) {
             Type.BOSSBAR -> {
                 player.hideBossBar(bossBar)
-                val color = if (display.color in RebarConfig.WailaConfig.ALLOWED_BOSS_BAR_COLORS) {
-                    display.color
-                } else {
-                    RebarConfig.WailaConfig.DEFAULT_DISPLAY.color
-                }
-                val overlay = if (display.overlay in RebarConfig.WailaConfig.ALLOWED_BOSS_BAR_OVERLAYS) {
-                    display.overlay
-                } else {
-                    RebarConfig.WailaConfig.DEFAULT_DISPLAY.overlay
-                }
-
                 bossBar.name(display.text)
                 bossBar.color(color)
                 bossBar.overlay(overlay)
@@ -83,6 +92,11 @@ class Waila private constructor(private val player: Player, playerConfig: Player
             }
             Type.ACTIONBAR -> player.sendActionBar(display.text)
         }
+
+        lastText = display.text
+        lastColor = color
+        lastOverlay = overlay
+        lastProgress = display.progress
         wasVisible = true
     }
 
@@ -95,6 +109,9 @@ class Waila private constructor(private val player: Player, playerConfig: Player
             Type.BOSSBAR -> player.hideBossBar(bossBar)
             Type.ACTIONBAR -> player.sendActionBar(Component.empty())
         }
+        lastText = null
+        lastColor = null
+        lastOverlay = null
         wasVisible = false
     }
 
@@ -195,6 +212,11 @@ class Waila private constructor(private val player: Player, playerConfig: Player
         private val blockOverrides = mutableMapOf<BlockPosition, (Player) -> WailaDisplay?>()
         private val entityOverrides = mutableMapOf<UUID, (Player) -> WailaDisplay?>()
 
+        @JvmStatic
+        fun getWaila(player: Player): Waila? {
+            return wailas[player.uniqueId]
+        }
+
         /**
          * Forcibly adds a WAILA display for the given player.
          */

rebar/src/main/kotlin/io/github/pylonmc/rebar/waila/WailaPlaceholders.kt

@@ -0,0 +1,33 @@
+package io.github.pylonmc.rebar.waila
+
+import io.github.pylonmc.rebar.i18n.customMiniMessage
+import io.github.pylonmc.rebar.util.plainText
+import me.clip.placeholderapi.expansion.PlaceholderExpansion
+import net.kyori.adventure.bossbar.BossBar
+import org.bukkit.OfflinePlayer
+import org.bukkit.entity.Player
+
+object WailaPlaceholders : PlaceholderExpansion() {
+    @JvmField
+    val placeholders: List<String> = listOf("text", "plain_text", "color", "overlay", "progress")
+
+    override fun onRequest(player: OfflinePlayer?, params: String): String? {
+        if (player == null || player !is Player) return null
+        val waila = Waila.getWaila(player) ?: return null
+        return when(params) {
+            "text" -> waila.lastText?.let { customMiniMessage.serialize(it) } ?: ""
+            "plain_text" -> waila.lastText?.plainText ?: ""
+            "color" -> waila.lastColor?.let { BossBar.Color.NAMES.key(it) } ?: ""
+            "overlay" -> waila.lastOverlay?.let { BossBar.Overlay.NAMES.key(it) } ?: ""
+            else -> null
+        }
+    }
+
+    override fun getPlaceholders(): List<String?> = placeholders
+
+    override fun getIdentifier(): String = "rebarwaila"
+
+    override fun getAuthor(): String = "Rebar"
+
+    override fun getVersion(): String = "1.0.0"
+}