Allow arena signs to be broken while sneaking.

This commit "fixes" the problem introduced in the "no sign edits" commit
by not invoking the sign actions for interact events where the player is
sneaking. This is not the ideal way to go about it, but since we need to
bump the Spigot API version to access the sign change event that would
fix the underlying issue, this will have to do for now.

Fixes #791

changelog.md

@@ -20,6 +20,7 @@ These changes will (most likely) be included in the next version.
 - The `shuffle-positions` ability now correctly shuffles the position of the boss as well if `monster-teleport` is set to `false`.
 - The `obsidian-bomb` ability no longer breaks boss waves.
 - Text on Arena Signs is no longer explicitly truncated. This fixes an issue where color codes would count towards the character limit, causing the text that would otherwise fit on the sign to be cut off.
+- Arena Signs can once again be destroyed, but it is necessary to break them while sneaking.
 
 ## [0.108] - 2024-01-01
 ### Added

src/main/java/com/garbagemule/MobArena/signs/HandlesSignClicks.java

@@ -38,6 +38,9 @@ public void on(PlayerInteractEvent event) {
         if (!(block.getState() instanceof Sign)) {
             return;
         }
+        if (event.getPlayer().isSneaking()) {
+            return;
+        }
 
         ArenaSign sign = signStore.findByLocation(block.getLocation());
         if (sign != null) {

src/test/java/com/garbagemule/MobArena/signs/HandlesSignClicksTest.java

@@ -50,12 +50,27 @@ public void noSignBlockNoFun() {
         verifyNoInteractions(signStore, invokesSignAction);
     }
 
+    @Test
+    public void sneakingPlayerNoFun() {
+        Block block = mock(Block.class);
+        when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(true);
+        PlayerInteractEvent event = event(player, block);
+
+        subject.on(event);
+
+        verifyNoInteractions(signStore, invokesSignAction);
+    }
+
     @Test
     public void nonArenaSignNoFun() {
         Block block = mock(Block.class);
         when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(false);
         when(signStore.findByLocation(any())).thenReturn(null);
-        PlayerInteractEvent event = event(null, block);
+        PlayerInteractEvent event = event(player, block);
 
         subject.on(event);
 
@@ -68,9 +83,10 @@ public void arenaSignInvokesAction() {
         Block block = mock(Block.class);
         when(block.getLocation()).thenReturn(location);
         when(block.getState()).thenReturn(mock(Sign.class));
+        Player player = mock(Player.class);
+        when(player.isSneaking()).thenReturn(false);
         ArenaSign sign = new ArenaSign(location, "", "", "");
         when(signStore.findByLocation(location)).thenReturn(sign);
-        Player player = mock(Player.class);
         PlayerInteractEvent event = event(player, block);
 
         subject.on(event);