Add clearMessage method

- It is now possible to delete a message for yourself - WhatsApp Web Version got bumped up to 2,2035,14

Author: Louuke

bin/main/icu/jnet/whatsjava/WAClient.class

@@ -152,12 +152,20 @@ private void confirmLogin() {
 listener.onReceiveLoginResponse(200);
 }
 
-// Generic text message
+// Send generic text message
 public void sendMessage(String remoteJid, String messageContent) {
 String json = WAMessage.buildJson(remoteJid, messageContent, true, Instant.now().getEpochSecond());
 sendBinary(json, WAMetric.message, WAFlag.ignore);
 }
 
+// Delete the send message only for you
+public void clearMessage(String remoteJid, String messageId, boolean owner) {
+String modTag = Math.round(Math.random() * 1000000) + "";
+sendBinary("[\"action\", {epoch: \"" + Utils.getMessageCount() + "\", type: \"set\"}, "
++ "[[\"chat\", {jid: \"" + remoteJid + "\", modify_tag: \"" + modTag +"\", type: \"clear\"}, "
++ "[[\"item\", {owner: \"" + owner + "\", index: \"" + messageId +"\"}, null]]]]]", WAMetric.group, WAFlag.ignore);
+}
+
 // Load the last x messages of a direct chat or group
 public void loadConversation(String remoteJid, int messageCount) {
 sendBinary("[\"query\", {type: \"message\", epoch: \"" + Utils.getMessageCount() + "\", jid: \"" + remoteJid + "\", "