addFriend() and removeFriend() functionality

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -1685,4 +1685,13 @@ public interface Client extends GameShell
 	 */
 	void sortMenuEntries();
 
+	/**
+	 * Add player to friendlist
+	 */
+	void addFriend(String name);
+
+	/**
+	 * Remove player from friendlist
+	 */
+	void removeFriend(String name);
 }

runelite-mixins/src/main/java/net/runelite/mixins/RSClientMixin.java

@@ -1607,4 +1607,20 @@ public abstract class RSClientMixin implements RSClient
 
 		return hideFriendAttackOptions && (p.isFriended() || p.isClanMember());
 	}
+
+	@Inject
+	@Override
+	public void addFriend(String friend)
+	{
+		RSFriendSystem friendSystem = getFriendManager();
+		friendSystem.addFriend(friend);
+	}
+
+	@Inject
+	@Override
+	public void removeFriend(String friend)
+	{
+		RSFriendSystem friendSystem = getFriendManager();
+		friendSystem.removeFriend(friend);
+	}
 }

runescape-api/src/main/java/net/runelite/rs/api/RSFriendSystem.java

@@ -13,4 +13,10 @@ public interface RSFriendSystem extends FriendManager
 
 	@Import("isFriended")
 	boolean isFriended(RSUsername var1, boolean var2);
+
+	@Import("addFriend")
+	void addFriend(String username);
+
+	@Import("removeFriend")
+	void removeFriend(String username);
 }

runescape-client/src/main/java/FontName.java

@@ -147,7 +147,7 @@ public class FontName {
                return 1;
             } else if (var0 == 3605) {
                var4 = Interpreter.Interpreter_stringStack[--Interpreter.Interpreter_stringStackSize];
-               WorldMapArea.friendSystem.method103(var4);
+               WorldMapArea.friendSystem.addFriend(var4);
                return 1;
             } else if (var0 == 3606) {
                var4 = Interpreter.Interpreter_stringStack[--Interpreter.Interpreter_stringStackSize];

runescape-client/src/main/java/FriendSystem.java

@@ -129,7 +129,8 @@ public class FriendSystem {
       signature = "(Ljava/lang/String;I)V",
       garbageValue = "-1721017960"
    )
-   final void method103(String var1) {
+   @Export("addFriend")
+   final void addFriend(String var1) {
       if (var1 != null) {
          Username var2 = new Username(var1, this.loginType);
          if (var2.hasCleanName()) {