feat: implement region config prohibit_viewing_containers

UPDATING.md

@@ -109,12 +109,13 @@ to make vane compatible with a new minecraft release.
 	Enter the server. Now it is important to test those parts of vane which interface with
 	the mojang mappings, since those are the most likely to break.
 
-    - `/customitem give sickle` should display as a sickle, should work when used on wheat. (Tests custom item registration and event dispatching)
-    - Take an elytra in your hand, run `/enchant angel 1`, test whether you can fly. (Tests custom enchantment registration)
+    - `/customitem give vane_trifles:golden_sickle` should display as a sickle, should work when used on wheat. (Tests custom item registration and event dispatching)
+    - Take an elytra in your hand, run `/enchant vane_enchantments:angel`, test whether you can accelerate by sneaking. (Tests custom enchantment registration)
     - Duplicate the elytra, go into survival mode (IMPORTANT!) then combine them on an anvil. You should get Angel II.
+	- Take a smithing table, combine the elytra with a netherite ingot. (Test's complex smithing recipe integration)
     - Put some random blocks and items in a chest, place a button next to it and press it. The chest should now be sorted.
 
-    Fix issues if necessary, make a new commit.
+    Fix issues and make a new commit if necessary.
 
 12. Copy the generated resource pack to `docs/resourcepacks/<new_version>.zip`, and update
 	vane's version numer in `build.gradle.kts` (always bump minor version for mojang version updates).

vane-regions/src/main/java/org/oddlama/vane/regions/Regions.java

@@ -122,6 +122,9 @@ public class Regions extends Module<Regions> {
 	@ConfigBoolean(def = false, desc = "Use economy via VaultAPI as currency provider.")
 	public boolean config_economy_as_currency;
 
+	@ConfigBoolean(def = false, desc = "Enable this to prevent players without the conatiner permission from being able to view chests.")
+	public boolean config_prohibit_viewing_containers;
+
 	@ConfigInt(
 		def = 0,
 		min = -1,

vane-regions/src/main/java/org/oddlama/vane/regions/event/RegionRoleSettingEnforcer.java

@@ -22,6 +22,7 @@
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryDragEvent;
 import org.bukkit.event.inventory.InventoryInteractEvent;
+import org.bukkit.event.inventory.InventoryOpenEvent;
 import org.bukkit.event.player.PlayerArmorStandManipulateEvent;
 import org.bukkit.event.player.PlayerBucketEmptyEvent;
 import org.bukkit.event.player.PlayerBucketFillEvent;
@@ -226,6 +227,31 @@ public void on_player_interact(final PlayerInteractEvent event) {
 		}
 	}
 
+	@EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+	public void on_player_inventory_open(final InventoryOpenEvent event) {
+		// Only relevant if viewing should be prohibited, too.
+		if (!get_module().config_prohibit_viewing_containers) {
+			return;
+		}
+
+		if (!(event.getPlayer() instanceof Player player)) {
+			return;
+		}
+
+		final var inventory = event.getInventory();
+		if (inventory.getLocation() == null || inventory.getHolder() == null) {
+			// Inventory is virtual / transient
+			return;
+		}
+
+		final var holder = inventory.getHolder();
+		if (holder instanceof DoubleChest || holder instanceof Container || holder instanceof Minecart) {
+			if (check_setting_at(inventory.getLocation(), player, RoleSetting.CONTAINER, false)) {
+				event.setCancelled(true);
+			}
+		}
+	}
+
 	public void on_player_inventory_interact(final InventoryInteractEvent event) {
 		final var clicker = event.getWhoClicked();
 		if (!(clicker instanceof Player)) {