Refactor get_room_last_message_time()

- Refactor get_last_date_that_has_logs()

- use NATURAL JOIN in SQL query instead of multiple SELECT via
_build_contact_where

- make code more concise

- update method documentation

gajim/common/connection.py

@@ -2562,19 +2562,16 @@ class Connection(CommonConnection, ConnectionHandlers):
         # last date/time in history to avoid duplicate
         if room_jid not in self.last_history_time:
             # Not in memory, get it from DB
-            last_log = None
-            # Do not check if we are not logging for this room
+            last_log = 0
             if gajim.config.should_log(self.name, room_jid):
                 # Check time first in the FAST table
-                last_log = gajim.logger.get_room_last_message_time(room_jid)
-                if last_log is None:
-                    # Not in special table, get it from messages DB
-                    last_log = gajim.logger.get_last_date_that_has_logs(room_jid,
-                            is_room=True)
+                last_log = gajim.logger.get_room_last_message_time(
+                    self.name, room_jid)
+                if not last_log:
+                    last_log = 0
+
             # Create self.last_history_time[room_jid] even if not logging,
             # could be used in connection_handlers
-            if last_log is None:
-                last_log = 0
             self.last_history_time[room_jid] = last_log
 
         p = nbxmpp.Presence(to='%s/%s' % (room_jid, nick),

gajim/common/logger.py

@@ -807,58 +807,51 @@ class Logger:
                                       date.timestamp(),
                                       (date + delta).timestamp())).fetchall()
 
-    def get_last_date_that_has_logs(self, jid, account=None, is_room=False):
+    def get_last_date_that_has_logs(self, account, jid):
         """
-        Return last time (in seconds since EPOCH) for which we had logs
-        (excluding statuses)
+        Get the timestamp of the last message we received for the jid.
+
+        :param account: The account
+
+        :param jid:     The jid for which we request the last timestamp
+
+        returns a timestamp or None
         """
-        where_sql = ''
-        if not is_room:
-            where_sql, jid_tuple = self._build_contact_where(account, jid)
-        else:
-            try:
-                jid_id = self.get_jid_id(jid, 'ROOM')
-            except exceptions.PysqliteOperationalError:
-                # Error trying to create a new jid_id. This means there is no log
-                return None
-            where_sql = 'jid_id = ?'
-            jid_tuple = (jid_id,)
-        self.cur.execute('''
+        jids = self._get_family_jids(account, jid)
+
+        kinds = map(str, [KindConstant.STATUS,
+                          KindConstant.GCSTATUS])
+
+        sql = '''
             SELECT MAX(time) as time FROM logs
-            WHERE (%s)
-            AND kind NOT IN (%d, %d)
-            ''' % (where_sql, KindConstant.STATUS, KindConstant.GCSTATUS),
-            jid_tuple)
+            NATURAL JOIN jids WHERE jid IN ({jids})
+            AND kind NOT IN ({kinds})
+            '''.format(jids=', '.join('?' * len(jids)),
+                       kinds=', '.join(kinds))
 
-        results = self.cur.fetchone()
-        if results is not None:
-            result = results.time
-        else:
-            result = None
-        return result
+        # fetchone() returns always at least one Row with all
+        # attributes set to None because of the MAX() function
+        return self.con.execute(sql, (*jids,)).fetchone().time
 
-    def get_room_last_message_time(self, jid):
+    def get_room_last_message_time(self, account, jid):
         """
-        Return FASTLY last time (in seconds since EPOCH) for which we had logs
-        for that room from rooms_last_message_time table
+        Get the timestamp of the last message we received in a room.
+
+        :param account: The account
+
+        :param jid:     The jid for which we request the last timestamp
+
+        returns a timestamp or None
         """
-        try:
-            jid_id = self.get_jid_id(jid, 'ROOM')
-        except exceptions.PysqliteOperationalError:
-            # Error trying to create a new jid_id. This means there is no log
-            return None
-        where_sql = 'jid_id = %s' % jid_id
-        self.cur.execute('''
+        sql = '''
             SELECT time FROM rooms_last_message_time
-                WHERE (%s)
-                ''' % (where_sql))
+            NATURAL JOIN jids WHERE jid = ?
+            '''
 
-        results = self.cur.fetchone()
-        if results is not None:
-            result = results.time
-        else:
-            result = None
-        return result
+        row = self.con.execute(sql, (jid,)).fetchone()
+        if not row:
+            return self.get_last_date_that_has_logs(account, jid)
+        return row.time
 
     def set_room_last_message_time(self, jid, time):
         """

gajim/history_window.py

@@ -305,7 +305,7 @@ class HistoryWindow:
             # select logs for last date we have logs with contact
             self.calendar.set_sensitive(True)
             last_log = \
-                    gajim.logger.get_last_date_that_has_logs(self.jid, self.account)
+                    gajim.logger.get_last_date_that_has_logs(self.account, self.jid)
 
             date = time.localtime(last_log)