From 85a5b5b6bc1571a671ccf7d8513abac1f80829e3 Mon Sep 17 00:00:00 2001
From: Florian CUNY <poslovitch@bentobox.world>
Date: Thu, 29 Aug 2019 13:35:35 +0200
Subject: [PATCH] Added SPAWNER_SPAWN_EGGS (WORLD_SETTING) flag
 https://github.com/BentoBoxWorld/BentoBox/issues/768

---
 .../SpawnerSpawnEggsListener.java             | 35 +++++++++++++++++++
 .../world/bentobox/bentobox/lists/Flags.java  |  9 +++++
 src/main/resources/locales/en-US.yml          |  6 ++++
 3 files changed, 50 insertions(+)
 create mode 100644 src/main/java/world/bentobox/bentobox/listeners/flags/worldsettings/SpawnerSpawnEggsListener.java

diff --git a/src/main/java/world/bentobox/bentobox/listeners/flags/worldsettings/SpawnerSpawnEggsListener.java b/src/main/java/world/bentobox/bentobox/listeners/flags/worldsettings/SpawnerSpawnEggsListener.java
new file mode 100644
index 000000000..a8135a93f
--- /dev/null
+++ b/src/main/java/world/bentobox/bentobox/listeners/flags/worldsettings/SpawnerSpawnEggsListener.java
@@ -0,0 +1,35 @@
+package world.bentobox.bentobox.listeners.flags.worldsettings;
+
+import org.bukkit.Material;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.player.PlayerInteractEvent;
+import world.bentobox.bentobox.api.flags.FlagListener;
+import world.bentobox.bentobox.api.localization.TextVariables;
+import world.bentobox.bentobox.api.user.User;
+import world.bentobox.bentobox.lists.Flags;
+
+/**
+ * Prevents players from changing a spawner's entity using spawn eggs.
+ * @since 1.7.0
+ * @see world.bentobox.bentobox.lists.Flags#SPAWNER_SPAWN_EGGS
+ */
+public class SpawnerSpawnEggsListener extends FlagListener {
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    public void onSpawnerChange(final PlayerInteractEvent e) {
+        User user = User.getInstance(e.getPlayer());
+        // Checking if the clicked block is a spawner and the item in hand is a mob egg
+        if (e.getClickedBlock() != null && e.getClickedBlock().getType().equals(Material.SPAWNER)
+                && e.getItem() != null && e.getItem().getType().toString().endsWith("_SPAWN_EGG")
+                && getIWM().inWorld(e.getClickedBlock().getWorld())
+                && !(user.hasPermission(getIWM().getPermissionPrefix(e.getClickedBlock().getWorld()) + "mod.bypass." + Flags.SPAWNER_SPAWN_EGGS.getID() + ".everywhere")
+                || user.hasPermission(getIWM().getPermissionPrefix(e.getClickedBlock().getWorld()) + "mod.bypassprotect"))
+                && !Flags.SPAWNER_SPAWN_EGGS.isSetForWorld(e.getClickedBlock().getWorld())) {
+            // Not allowed
+            e.setCancelled(true);
+            // Notify the user
+            user.notify("protection.protected", TextVariables.DESCRIPTION, user.getTranslation(Flags.SPAWNER_SPAWN_EGGS.getHintReference()));
+        }
+    }
+}
diff --git a/src/main/java/world/bentobox/bentobox/lists/Flags.java b/src/main/java/world/bentobox/bentobox/lists/Flags.java
index f5f28a2f0..22c2b4c4b 100644
--- a/src/main/java/world/bentobox/bentobox/lists/Flags.java
+++ b/src/main/java/world/bentobox/bentobox/lists/Flags.java
@@ -55,6 +55,7 @@ import world.bentobox.bentobox.listeners.flags.worldsettings.OfflineGrowthListen
 import world.bentobox.bentobox.listeners.flags.worldsettings.OfflineRedstoneListener;
 import world.bentobox.bentobox.listeners.flags.worldsettings.PistonPushListener;
 import world.bentobox.bentobox.listeners.flags.worldsettings.RemoveMobsListener;
+import world.bentobox.bentobox.listeners.flags.worldsettings.SpawnerSpawnEggsListener;
 import world.bentobox.bentobox.listeners.flags.worldsettings.TreesGrowingOutsideRangeListener;
 import world.bentobox.bentobox.listeners.flags.worldsettings.WitherListener;
 import world.bentobox.bentobox.managers.RanksManager;
@@ -437,9 +438,17 @@ public final class Flags {
     /**
      * Toggles wither explosion damage
      * @since 1.6.0
+     * @see WitherListener
      */
     public static final Flag WITHER_DAMAGE = new Flag.Builder("WITHER_DAMAGE", Material.WITHER_SKELETON_SKULL).listener(new WitherListener()).type(Type.WORLD_SETTING).build();
 
+    /**
+     * Toggles whether players can change a spawner's entity using spawn eggs.
+     * @since 1.7.0
+     * @see SpawnerSpawnEggsListener
+     */
+    public static final Flag SPAWNER_SPAWN_EGGS = new Flag.Builder("SPAWNER_SPAWN_EGGS", Material.SPAWNER).listener(new SpawnerSpawnEggsListener()).type(Type.WORLD_SETTING).defaultSetting(true).build();
+
     /**
      * Provides a list of all the Flag instances contained in this class using reflection.
      * @return List of all the flags in this class
diff --git a/src/main/resources/locales/en-US.yml b/src/main/resources/locales/en-US.yml
index 7d5fc1ecc..92e0d9071 100644
--- a/src/main/resources/locales/en-US.yml
+++ b/src/main/resources/locales/en-US.yml
@@ -1005,6 +1005,12 @@ protection:
       description: "Toggle use"
       name: "Spawn eggs"
       hint: "No throwing spawn eggs"
+    SPAWNER_SPAWN_EGGS:
+      description: |-
+        &aAllows to change a spawner's entity type
+        &ausing spawn eggs.
+      name: "Spawn eggs on spawners"
+      hint: "changing a spawner's entity type using spawn eggs is not allowed"
     TNT_DAMAGE:
       description: |-
         &aAllow TNT and TNT minecarts