Add setMessage to chat event

src/eu/the5zig/mod/event/ChatEvent.java

@@ -24,6 +24,10 @@ public class ChatEvent extends Event implements Cancelable {
 	/**
 	 * The message of the server.
 	 */
+	private String originalMessage;
+	/**
+	 * Can be changed by plugins.
+	 */
 	private String message;
 	/**
 	 * An object that represents a minecraft internal chat component. Used internally to send messages to the second chat.
@@ -36,14 +40,33 @@ public class ChatEvent extends Event implements Cancelable {
 	private boolean cancelled;
 
 	public ChatEvent(String message, Object chatComponent) {
-		this.message = message;
+		this.originalMessage = message;
 		this.chatComponent = chatComponent;
 	}
 
 	/**
 	 * @return the chat message that has been received.
 	 */
 	public String getMessage() {
+		return originalMessage;
+	}
+
+	/**
+	 * Changes the chat message. The message will be only changed if {@link #isCancelled()} is {@code false}.
+	 * Note, that {@link #getMessage()} still returns the original message to maintain compatibility.
+	 *
+	 * @param message the new message.
+	 */
+	public void setMessage(String message) {
+		if (message == null || !message.equals(originalMessage)) {
+			this.message = message;
+		}
+	}
+
+	/**
+	 * @return the chat message that has been changed by plugins or {@code null}, if the chat message has not been changed.
+	 */
+	public String getAlteredMessage() {
 		return message;
 	}