Add TranslationLoadEvent

src/com/palmergames/bukkit/towny/event/TranslationLoadEvent.java

@@ -0,0 +1,38 @@
+package com.palmergames.bukkit.towny.event;
+
+import org.bukkit.Bukkit;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class TranslationLoadEvent extends Event {
+	private static final HandlerList handlers = new HandlerList();
+	private final Map<String, Map<String, String>> addedTranslations;
+
+	public TranslationLoadEvent() {
+		super(!Bukkit.isPrimaryThread());
+		this.addedTranslations = new HashMap<>();
+	}
+
+	public void addTranslation(@NotNull String locale, @NotNull String key, @NotNull String value) {
+		addedTranslations.computeIfAbsent(locale, k -> new HashMap<>());
+
+		addedTranslations.get(locale).put(key, value);
+	}
+
+	public Map<String, Map<String, String>> getAddedTranslations() {
+		return addedTranslations;
+	}
+
+	@Override
+	public @NotNull HandlerList getHandlers() {
+		return handlers;
+	}
+
+	public static HandlerList getHandlerList() {
+		return handlers;
+	}
+}

src/com/palmergames/bukkit/towny/object/Translation.java

@@ -5,10 +5,12 @@
 import com.palmergames.bukkit.towny.TownySettings;
 import com.palmergames.bukkit.towny.TownyUniverse;
 import com.palmergames.bukkit.towny.command.HelpMenu;
+import com.palmergames.bukkit.towny.event.TranslationLoadEvent;
 import com.palmergames.bukkit.util.BukkitTools;
 import com.palmergames.bukkit.util.Colors;
 import com.palmergames.util.FileMgmt;
 import org.apache.commons.compress.utils.FileNameUtils;
+import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.Nullable;
@@ -78,6 +80,17 @@ public static void loadTranslationRegistry() {
 				e.printStackTrace();
 			}
 		}
+
+		TranslationLoadEvent translationLoadEvent = new TranslationLoadEvent();
+		Bukkit.getPluginManager().callEvent(translationLoadEvent);
+
+		Map<String, Map<String, String>> addedTranslations = translationLoadEvent.getAddedTranslations();
+		if (addedTranslations != null && !addedTranslations.isEmpty()) {
+			for (String lang : addedTranslations.keySet())
+				if (addedTranslations.get(lang) != null && !addedTranslations.get(lang).isEmpty())
+					for (Map.Entry<String, String> entry : addedTranslations.get(lang).entrySet())
+						translations.get(lang).put(entry.getKey().toLowerCase(Locale.ROOT), entry.getValue());
+		}
 
 		// Load optional override files.
 		File[] overrideFiles = new File(langFolder + File.separator + "override").listFiles();