Added fuction for infinite scroll, limited number of messages per request to 10.

poezio/mam.py

@@ -6,38 +6,78 @@
     XEP-0313: Message Archive Management(MAM).
 """
 
-from datetime import datetime, timezone
+import asyncio
+from datetime import datetime, timedelta, timezone
 from poezio.theming import get_theme
 from poezio.text_buffer import Message, TextBuffer
 
-async def MAM(self, remote_jid, start, end):
+def add_line(text_buffer: TextBuffer, text: str, str_time: str, nick: str, top: bool):
+    """Adds a textual entry in the TextBuffer"""
+
+    time = datetime.strftime(str_time, '%Y-%m-%d %H:%M:%S')
+    time = datetime.strptime(time, '%Y-%m-%d %H:%M:%S')
+    nick = nick.split('/')[1]
+    color = get_theme().COLOR_OWN_NICK
+    top = top
+    text_buffer.add_message(
+        text,
+        time,
+        nick,
+        color,
+        True,  # History
+        None,  # User
+        False,  # Highlight
+        top, #Top
+        None,  # Identifier
+        None,  # str_time
+        None,  # Jid
+    )
+
+async def MAM(self, remote_jid, start, end, top):
     self.remote_jid = remote_jid
     self.start_date = start
     self.end_date = end
     text_buffer = self._text_buffer
     results = self.core.xmpp.plugin['xep_0313'].retrieve(jid=self.remote_jid,
-    iterator=True, start=self.start_date, end=self.end_date)
+    iterator=True, reverse=top, start=self.start_date, end=self.end_date)
+    msg_count = 0
+    msgs = []
     async for rsm in results:
-        for msg in rsm['mam']['results']:
-            forwarded = msg['mam_result']['forwarded']
-            timestamp = forwarded['delay']['stamp']
-            message = forwarded['stanza']
-            text = str(message['body'])
-            time = datetime.strftime(timestamp, '%Y-%m-%d %H:%M:%S')
-            time = datetime.strptime(time, '%Y-%m-%d %H:%M:%S')
-            time = time.replace(tzinfo=timezone.utc).astimezone(tz=None)
-            nick = str(message['from']).split('/')[1]
-            color = get_theme().COLOR_OWN_NICK
-            text_buffer.add_message(
-                text,
-                time,
-                nick,
-                color,
-                True,  # History
-                None,  # User
-                False,  # Highlight
-                None,  # Identifier
-                None,  # str_time
-                None,  # Jid
-            )
-            self.core.refresh_window()
+        if top:
+            for msg in rsm['mam']['results']:
+                msgs.append(msg)
+                if msg_count == 10:
+                    return
+                msg_count += 1
+            msgs.reverse()
+            for msg in msgs:
+                forwarded = msg['mam_result']['forwarded']
+                timestamp = forwarded['delay']['stamp']
+                message = forwarded['stanza']
+                add_line(text_buffer, '%s' % message['body'], timestamp, str(message['from']), top)
+                self.text_win.scroll_up(len(self.text_win.built_lines))
+                self.core.refresh_window()
+        else:
+            for msg in rsm['mam']['results']:
+                forwarded = msg['mam_result']['forwarded']
+                timestamp = forwarded['delay']['stamp']
+                message = forwarded['stanza']
+                add_line(text_buffer, '%s' % message['body'], timestamp, str(message['from']), top)
+                self.core.refresh_window()
+
+
+def mam_scroll(self):
+    remote_jid = self.jid
+    text_buffer = self._text_buffer
+    end = datetime.now()
+    for message in text_buffer.messages:
+        time = message.time
+        if time < end:
+            end = time
+    end = end + timedelta(seconds=-1)
+    end = datetime.strftime(end, '%Y-%m-%dT%H:%M:%SZ')
+    start = datetime.strptime(end, '%Y-%m-%dT%H:%M:%SZ')
+    start = start + timedelta(days=-10)
+    start = datetime.strftime(start, '%Y-%m-%dT%H:%M:%SZ')
+    top = True
+    asyncio.ensure_future(MAM(self, remote_jid, start, end, top))
\ No newline at end of file