add DamageSwap Challenge

src/main/kotlin/de/stckoverflw/stckutils/minecraft/challenge/ChallengeManager.kt

@@ -39,6 +39,7 @@ object ChallengeManager {
             LevelBorder,
             IceWalker,
             Medusa,
+            DamageSwap,
         )
     }
 

src/main/kotlin/de/stckoverflw/stckutils/minecraft/challenge/impl/DamageSwap.kt

@@ -0,0 +1,44 @@
+package de.stckoverflw.stckutils.minecraft.challenge.impl
+
+import de.stckoverflw.stckutils.extension.isPlaying
+import de.stckoverflw.stckutils.minecraft.challenge.Challenge
+import net.axay.kspigot.extensions.onlinePlayers
+import net.axay.kspigot.gui.ForInventoryFiveByNine
+import net.axay.kspigot.gui.GUI
+import org.bukkit.Material
+import org.bukkit.entity.Player
+import org.bukkit.event.EventHandler
+import org.bukkit.event.entity.EntityDamageEvent
+
+object DamageSwap : Challenge() {
+
+    override val id: String = "damage-swap"
+    override val name: String = "§4DamageSwap"
+    override val material: Material = Material.SHIELD
+    override val description: List<String> = listOf(
+        " ",
+        "§7When you take damage, someone else",
+        "§7takes the damage instead of you"
+    )
+    override val usesEvents: Boolean = true
+
+    override fun configurationGUI(): GUI<ForInventoryFiveByNine>? = null
+
+    @EventHandler
+    fun onDamage(event: EntityDamageEvent) {
+        if (event.entity !is Player ||
+            !(event.entity as Player).isPlaying() ||
+            event.cause == EntityDamageEvent.DamageCause.CUSTOM
+        ) {
+            return
+        }
+        val otherPlayers = onlinePlayers.filter { it != event.entity && it.isPlaying() }
+        if (otherPlayers.isEmpty()) {
+            return
+        }
+        otherPlayers
+            .random()
+            .damage(event.damage)
+        event.isCancelled = true
+    }
+}

src/main/kotlin/de/stckoverflw/stckutils/minecraft/challenge/impl/IceWalker.kt

@@ -42,7 +42,7 @@ object IceWalker : Challenge() {
     override val description: List<String> = listOf(
         " ",
         "§7When you walk, a 3x3 ice platform",
-        "will be formed below you.",
+        "§7will be formed below you.",
         "§7You can toggle this ability by sneaking."
     )
     override val usesEvents: Boolean = true