(stats): Rewrite to include session data.

Complete `stats` command rewrite to include session data.
Added `get_member_rank` query to get accurate time and coin ranks.

bot/core/data.py

@@ -50,8 +50,6 @@ lions = RowTable(
     attach_as='lions'
 )
 
-lion_ranks = Table('member_ranks', attach_as='lion_ranks')
-
 
 @lions.save_query
 def add_pending(pending):
@@ -83,6 +81,35 @@ def add_pending(pending):
         return lions._make_rows(*data)
 
 
+lion_ranks = Table('member_ranks', attach_as='lion_ranks')
+
+
+@lions.save_query
+def get_member_rank(guildid, userid, untracked):
+    """
+    Get the time and coin ranking for the given member, ignoring the provided untracked members.
+    """
+    with lions.conn as conn:
+        with conn.cursor() as curs:
+            curs.execute(
+                """
+                SELECT
+                  time_rank, coin_rank
+                FROM (
+                  SELECT
+                    userid,
+                    row_number() OVER (ORDER BY total_tracked_time DESC, userid ASC) AS time_rank,
+                    row_number() OVER (ORDER BY total_coins DESC, userid ASC) AS coin_rank
+                  FROM members_totals
+                  WHERE
+                    guildid=%s AND userid NOT IN %s
+                ) AS guild_ranks WHERE userid=%s
+                """,
+                (guildid, tuple(untracked), userid)
+            )
+            return curs.fetchone() or (None, None)
+
+
 global_guild_blacklist = Table('global_guild_blacklist')
 global_user_blacklist = Table('global_user_blacklist')
 ignored_members = Table('ignored_members')