From effeb7b585054c89d993e5fc7e42deebfb3ca325 Mon Sep 17 00:00:00 2001
From: Daniel Gultsch <daniel@gultsch.de>
Date: Sat, 28 Apr 2018 21:30:30 +0200
Subject: [PATCH] convert empty resources in messages to bare jid

---
 src/main/java/eu/siacs/conversations/xml/Element.java |  3 ++-
 .../java/eu/siacs/conversations/xmpp/InvalidJid.java  | 11 ++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/main/java/eu/siacs/conversations/xml/Element.java b/src/main/java/eu/siacs/conversations/xml/Element.java
index b103e8647..b31cef68e 100644
--- a/src/main/java/eu/siacs/conversations/xml/Element.java
+++ b/src/main/java/eu/siacs/conversations/xml/Element.java
@@ -12,6 +12,7 @@ import java.util.Locale;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.utils.XmlHelper;
 import eu.siacs.conversations.xmpp.InvalidJid;
+import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 import rocks.xmpp.addr.Jid;
 
 public class Element {
@@ -154,7 +155,7 @@ public class Element {
 			try {
 				return Jid.ofEscaped(jid);
 			} catch (final IllegalArgumentException e) {
-				return new InvalidJid(jid);
+				return InvalidJid.of(jid, this instanceof MessagePacket);
 			}
 		}
 		return null;
diff --git a/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java b/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java
index e1f257fd3..66f6bfb90 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/InvalidJid.java
@@ -37,9 +37,18 @@ public class InvalidJid implements Jid {
 
 	private final String value;
 
-	public InvalidJid(String jid) {
+	private InvalidJid(String jid) {
 		this.value = jid;
 	}
+	public  static Jid of(String jid, boolean fallback) {
+		final int pos = jid.indexOf('/');
+		if (fallback && pos >= 0 && jid.length() >= pos + 1) {
+			if (jid.substring(pos+1).trim().isEmpty()) {
+				return Jid.ofEscaped(jid.substring(0,pos));
+			}
+		}
+		return new InvalidJid(jid);
+	}
 
 	@Override
 	@NonNull