Auto adds default placeholders for GameModeAddons

src/main/java/world/bentobox/bentobox/BentoBox.java

@@ -30,6 +30,7 @@
 import world.bentobox.bentobox.managers.AddonsManager;
 import world.bentobox.bentobox.managers.CommandsManager;
 import world.bentobox.bentobox.managers.FlagsManager;
+import world.bentobox.bentobox.managers.GameModePlaceholderManager;
 import world.bentobox.bentobox.managers.HooksManager;
 import world.bentobox.bentobox.managers.IslandDeletionManager;
 import world.bentobox.bentobox.managers.IslandWorldManager;
@@ -154,6 +155,10 @@ public void onEnable(){
         addonsManager.loadAddons();
         // Enable addons
         addonsManager.enableAddons();
+
+        // Register default gamemode placeholders
+        GameModePlaceholderManager gmp = new GameModePlaceholderManager(this);
+        addonsManager.getGameModeAddons().forEach(gmp::registerGameModePlaceholders);
 
         getServer().getScheduler().runTask(instance, () -> {
             // Register Listeners

src/main/java/world/bentobox/bentobox/api/placeholders/placeholderapi/BasicPlaceholderExpansion.java

@@ -49,4 +49,14 @@ public String onPlaceholderRequest(Player p, String placeholder) {
         }
         return null;
     }
+
+    /**
+     * Checks if a placeholder with this name is already registered
+     * @param placeholder - name of placeholder
+     * @return <tt>true</tt> if a placeholder with this name is already registered
+     * @since 1.4.0
+     */
+    public boolean isPlaceholder(@NonNull String placeholder) {
+    	return placeholders.containsKey(placeholder);
+    }
 }

src/main/java/world/bentobox/bentobox/hooks/PlaceholderAPIHook.java

@@ -107,4 +107,15 @@ public void unregisterPlaceholder(@NonNull Addon addon, @NonNull String placehol
     public void registerAddonPlaceholder(Addon addon, String placeholder, PlaceholderReplacer replacer) {
         registerPlaceholder(addon, placeholder, replacer);
     }
+
+    /**
+     * Checks if a placeholder with this name is already registered
+     * @param addon the addon, not null
+     * @param placeholder - name of placeholder
+     * @return <tt>true</tt> if a placeholder with this name is already registered
+     * @since 1.4.0
+     */
+    public boolean isPlaceholder(@NonNull Addon addon, @NonNull String placeholder) {
+    	return addonsExpansions.containsKey(addon) ? addonsExpansions.get(addon).isPlaceholder(placeholder) : false;
+    }
 }

src/main/java/world/bentobox/bentobox/lists/GameModePlaceholders.java

@@ -0,0 +1,22 @@
+package world.bentobox.bentobox.lists;
+
+public enum GameModePlaceholders {
+
+    WORLD_FRIENDLY_NAME("world-friendlyname"),
+    ISLAND_DISTANCE("island-distance"),
+    ISLAND_PROTECTION_RANGE("island-protection-range"),
+    ISLAND_OWNER("island-owner"),
+    ISLAND_CREATION_DATE("island-creation-date"),
+    ISLAND_SPAWNPOINT("island-spawnpoint"),
+    ISLAND_NAME("island-name");
+
+    private String placeholder;
+
+    GameModePlaceholders(String placeholder) {
+        this.placeholder = placeholder;
+    }
+
+    public String getPlaceholder() {
+        return placeholder;
+    }
+}

src/main/java/world/bentobox/bentobox/managers/GameModePlaceholderManager.java

@@ -0,0 +1,84 @@
+package world.bentobox.bentobox.managers;
+
+import world.bentobox.bentobox.BentoBox;
+import world.bentobox.bentobox.api.addons.GameModeAddon;
+import world.bentobox.bentobox.api.placeholders.PlaceholderReplacer;
+import world.bentobox.bentobox.api.user.User;
+import world.bentobox.bentobox.database.objects.Island;
+import world.bentobox.bentobox.lists.GameModePlaceholders;
+import world.bentobox.bentobox.util.Util;
+
+import java.text.DateFormat;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.EnumMap;
+import java.util.Map;
+
+/**
+ * 
+ * Registers default placeholders for all GameModes. Will not overwrite any that the gamemode addon itself implements.
+ * @author tastybento
+ *
+ */
+public class GameModePlaceholderManager {
+
+	private BentoBox plugin;
+
+	public GameModePlaceholderManager(BentoBox plugin) {
+		super();
+		this.plugin = plugin;
+	}
+
+	public void registerGameModePlaceholders(GameModeAddon addon) {
+		String prefix = addon.getDescription().getName().toLowerCase();
+		Map<GameModePlaceholders, String> placeholders = new EnumMap<>(GameModePlaceholders.class);
+		Arrays.stream(GameModePlaceholders.values()).forEach(placeholder -> placeholders.put(placeholder, prefix + "-" + placeholder.getPlaceholder()));
+
+		// Register placeholders only if they have not already been registered by the addon itself
+		placeholders.entrySet().stream().filter(en -> !plugin.getPlaceholdersManager().isPlaceholder(addon, en.getValue()))
+		.forEach(en -> plugin.getPlaceholdersManager().registerPlaceholder(en.getValue(), new DefaultPlaceholder(addon, en.getKey())));
+	}
+}
+
+class DefaultPlaceholder implements PlaceholderReplacer {
+	private final GameModeAddon addon;
+	private final GameModePlaceholders type;
+	public DefaultPlaceholder(GameModeAddon addon, GameModePlaceholders type) {
+		super();
+		this.addon = addon;
+		this.type = type;
+	}
+	/* (non-Javadoc)
+	 * @see world.bentobox.bentobox.api.placeholders.PlaceholderReplacer#onReplace(world.bentobox.bentobox.api.user.User)
+	 */
+	@Override
+	public String onReplace(User user) {
+		if (user == null) {
+			return "";
+		}
+		Island island = addon.getIslands().getIsland(addon.getOverWorld(), user);
+		switch (type) {
+		case WORLD_FRIENDLY_NAME:
+			return addon.getWorldSettings().getFriendlyName();
+		case ISLAND_CREATION_DATE:
+			return island == null ? "" : DateFormat.getInstance().format(Date.from(Instant.ofEpochMilli(island.getCreatedDate())));
+		case ISLAND_DISTANCE:
+			return String.valueOf(addon.getWorldSettings().getIslandDistance());
+		case ISLAND_NAME:
+			return island == null ? "" : (island.getName() == null ? "" : island.getName());
+		case ISLAND_OWNER:
+			return island == null ? "" : addon.getPlayers().getName(island.getOwner());
+		case ISLAND_PROTECTION_RANGE:			
+			return island == null ? "" : String.valueOf(island.getProtectionRange());
+		case ISLAND_SPAWNPOINT:
+			return island == null ? "" : Util.xyz(island.getCenter().toVector());
+		default:
+			return "";		
+		}
+	}
+
+}
+
+
+

src/main/java/world/bentobox/bentobox/managers/PlaceholdersManager.java

@@ -1,14 +1,15 @@
 package world.bentobox.bentobox.managers;
 
-import com.mongodb.lang.NonNull;
-import com.mongodb.lang.Nullable;
 import world.bentobox.bentobox.BentoBox;
 import world.bentobox.bentobox.api.addons.Addon;
 import world.bentobox.bentobox.api.placeholders.PlaceholderReplacer;
 import world.bentobox.bentobox.hooks.PlaceholderAPIHook;
 
 import java.util.Optional;
 
+import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
+
 /**
  * Manages placeholder integration.
  *
@@ -85,4 +86,15 @@ public void unregisterPlaceholder(@Nullable Addon addon, @NonNull String placeho
     private Optional<PlaceholderAPIHook> getPlaceholderAPIHook() {
         return plugin.getHooks().getHook("PlaceholderAPI").map(hook -> (PlaceholderAPIHook) hook);
     }
+
+    /**
+     * Checks if a placeholder with this name is already registered
+     * @param addon the addon, not null
+     * @param placeholder - name of placeholder
+     * @return <tt>true</tt> if a placeholder with this name is already registered
+     * @since 1.4.0
+     */
+    public boolean isPlaceholder(@NonNull Addon addon, @NonNull String placeholder) {
+    	return addon == null ? false : getPlaceholderAPIHook().map(h -> h.isPlaceholder(addon, placeholder)).orElse(false);
+    }
 }

src/test/java/world/bentobox/bentobox/managers/AddonsManagerTest.java

@@ -16,7 +16,7 @@
 @PrepareForTest( { BentoBox.class} )
 public class AddonsManagerTest {
 
-    private static BentoBox plugin;
+    private BentoBox plugin;
 
     @Before
     public void setup() {

src/test/java/world/bentobox/bentobox/managers/GameModePlaceholderManagerTest.java

@@ -0,0 +1,88 @@
+/**
+ * 
+ */
+package world.bentobox.bentobox.managers;
+
+import static org.mockito.Mockito.when;
+
+import org.eclipse.jdt.annotation.NonNull;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import world.bentobox.bentobox.BentoBox;
+import world.bentobox.bentobox.api.addons.AddonDescription;
+import world.bentobox.bentobox.api.addons.GameModeAddon;
+
+/**
+ * @author tastybento
+ *
+ */
+@RunWith(PowerMockRunner.class)
+@PrepareForTest( {BentoBox.class} )
+public class GameModePlaceholderManagerTest {
+
+	@Mock
+    private BentoBox plugin;
+	@Mock
+	private GameModeAddon addon;
+	@Mock
+	private PlaceholdersManager pm;
+
+
+
+	private GameModePlaceholderManager gpm;
+
+	/**
+	 * @throws java.lang.Exception
+	 */
+	@Before
+	public void setUp() throws Exception {
+		gpm = new GameModePlaceholderManager(plugin);
+		// Addon
+		@NonNull
+		AddonDescription desc = new AddonDescription.Builder("main", "bskyblock", "1.0").build();
+		when(addon.getDescription()).thenReturn(desc);
+
+		when(plugin.getPlaceholdersManager()).thenReturn(pm);
+		// No placeholders registered yet
+		when(pm.isPlaceholder(Mockito.any(), Mockito.any())).thenReturn(false);
+	}
+
+	/**
+	 * @throws java.lang.Exception
+	 */
+	@After
+	public void tearDown() throws Exception {
+	}
+
+	/**
+	 * Test method for {@link world.bentobox.bentobox.managers.GameModePlaceholderManager#registerGameModePlaceholders(world.bentobox.bentobox.api.addons.GameModeAddon)}.
+	 */
+	@Test
+	public void testRegisterGameModePlaceholdersAllDefaults() {
+		gpm.registerGameModePlaceholders(addon);
+		// 7 registrations for this addon
+		Mockito.verify(pm, Mockito.times(7)).registerPlaceholder(Mockito.anyString(), Mockito.any());
+	}
+
+	/**
+	 * Test method for {@link world.bentobox.bentobox.managers.GameModePlaceholderManager#registerGameModePlaceholders(world.bentobox.bentobox.api.addons.GameModeAddon)}.
+	 */
+	@Test
+	public void testRegisterGameModePlaceholdersSomePreregistered() {
+		// Some duplicates
+		when(pm.isPlaceholder(Mockito.any(), Mockito.any())).thenReturn(false, true, true, false, false, true, false);
+
+		gpm.registerGameModePlaceholders(addon);
+
+		// 3 registrations for this addon
+		Mockito.verify(pm, Mockito.times(4)).registerPlaceholder(Mockito.anyString(), Mockito.any());
+	}
+
+}