1 files changed, 44 insertions, 0 deletions
diff --git a/src/fixes.py b/src/fixes.py
index b7c8d03b..75ac6343 100644
--- a/src/fixes.py
+++ b/src/fixes.py
@@ -6,7 +6,9 @@ TODO: Check that they are fixed and remove those hacks
 """
 
 
+from sleekxmpp.stanza import Message
 from sleekxmpp.xmlstream import ET
+
 import logging
 
 log = logging.getLogger(__name__)
@@ -51,4 +53,46 @@ def get_room_form(xmpp, room):
     return form
 
 
+def _filter_add_receipt_request(self, stanza):
+    """
+    Auto add receipt requests to outgoing messages, if:
+
+        - ``self.auto_request`` is set to ``True``
+        - The message is not for groupchat
+        - The message does not contain a receipt acknowledgment
+        - The recipient is a bare JID or, if a full JID, one
+          that has the ``urn:xmpp:receipts`` feature enabled
+        - The message has a body
+
+    The disco cache is checked if a full JID is specified in
+    the outgoing message, which may mean a round-trip disco#info
+    delay for the first message sent to the JID if entity caps
+    are not used.
+    """
+
+    if not self.auto_request:
+        return stanza
+
+    if not isinstance(stanza, Message):
+        return stanza
+
+    if stanza['request_receipt']:
+        return stanza
+
+    if not stanza['type'] in self.ack_types:
+        return stanza
+
+    if stanza['receipt']:
+        return stanza
+
+    if not stanza['body']:
+        return stanza
+
+    if stanza['to'].resource:
+        if not self.xmpp['xep_0030'].supports(stanza['to'],
+                feature='urn:xmpp:receipts',
+                cached=True):
+            return stanza
 
+    stanza['request_receipt'] = True
+    return stanza