Set addon on login.

This is required so that the Game Mode context is set for any
translations that involve prefixes. If this isn't done, then the context
is not set until the player issues a command.

Author: tastybento

src/main/java/world/bentobox/bentobox/listeners/JoinLeaveListener.java

@@ -53,6 +53,10 @@ public void onPlayerJoin(final PlayerJoinEvent event) {
             // plugins
             return;
         }
+        // Set the addon in the User object - required to have the right context for prefixes in translations
+        plugin.getIWM().getAddon(event.getPlayer().getWorld()).ifPresent(gm -> user.setAddon(gm));
+        
+        // Get the UUID
         UUID playerUUID = event.getPlayer().getUniqueId();
 
         // Check if player hasn't joined before

src/test/java/world/bentobox/bentobox/listeners/JoinLeaveListenerTest.java

@@ -43,6 +43,7 @@
 import world.bentobox.bentobox.BentoBox;
 import world.bentobox.bentobox.RanksManagerBeforeClassTest;
 import world.bentobox.bentobox.Settings;
+import world.bentobox.bentobox.api.addons.AddonDescription;
 import world.bentobox.bentobox.api.addons.GameModeAddon;
 import world.bentobox.bentobox.api.user.User;
 import world.bentobox.bentobox.database.objects.Island;
@@ -91,6 +92,8 @@ public class JoinLeaveListenerTest extends RanksManagerBeforeClassTest {
     @Mock
     private AddonsManager am;
 
+    private AddonDescription desc;
+
     /**
      */
     @Before
@@ -107,6 +110,8 @@ public void setUp() throws Exception {
         when(iwm.isOnLeaveResetInventory(any())).thenReturn(true);
         when(iwm.getOverWorlds()).thenReturn(Collections.singletonList(world));
         when(iwm.getResetEpoch(any())).thenReturn(20L);
+        desc = new AddonDescription.Builder("main", "BSkyBlock", "1.0.0").build();
+        when(gameMode.getDescription()).thenReturn(desc);
         Optional<GameModeAddon> opGm = Optional.of(gameMode);
         when(iwm.getAddon(any())).thenReturn(opGm);
         when(gameMode.getPermissionPrefix()).thenReturn("acidisland.");