Added fix for TopInventory on pre-1.21

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/RenderedInventory.kt

@@ -1,5 +1,7 @@
 package com.willfp.eco.internal.gui.menu
 
+import com.willfp.eco.core.Eco
+import com.willfp.eco.core.Prerequisite
 import com.willfp.eco.core.gui.menu.events.CaptiveItemChangeEvent
 import com.willfp.eco.core.items.isEcoEmpty
 import com.willfp.eco.core.recipe.parts.EmptyTestableItem
@@ -20,9 +22,23 @@ fun Player.forceRenderedInventory(menu: RenderedInventory) {
     trackedForceRendered[this.uniqueId] = menu
 }
 
+// Workaround because 1.21 has OpenInventory as an interface instead of an abstract class like in previous versions
+interface TopInventoryProxy {
+    fun getTopInventory(player: Player): Inventory
+}
+
+private val Player.topInventory: Inventory
+    get() {
+        return if (!Prerequisite.HAS_1_21.isMet) {
+            Eco.get().ecoPlugin.getProxy(TopInventoryProxy::class.java).getTopInventory(this)
+        } else {
+            this.openInventory.topInventory
+        }
+    }
+
 val Player.renderedInventory: RenderedInventory?
     get() = trackedForceRendered[this.uniqueId]
-        ?: this.openInventory.topInventory.asRenderedInventory()
+        ?: this.topInventory.asRenderedInventory()
 
 class RenderedInventory(
     val menu: EcoMenu,

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_17_R1/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_17_R1
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_18_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R1/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_18_R1
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_18_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R2/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_18_R2
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_19_R1
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_19_R2
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_19_R3/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R3/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_19_R3
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_20_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_20_R1/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_20_R1
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_20_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_20_R2/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_20_R2
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}

eco-core/core-nms/v1_20_R3/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_20_R3/TopInventory.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.internal.spigot.proxy.v1_20_R3
+
+import com.willfp.eco.internal.gui.menu.TopInventoryProxy
+import org.bukkit.entity.Player
+import org.bukkit.inventory.Inventory
+
+class TopInventory: TopInventoryProxy {
+    override fun getTopInventory(player: Player): Inventory {
+        return player.openInventory.topInventory
+    }
+}