Add constants parsing for multiple leaderboards

I've added a unified approach to setting data for multiple leaderboards
using environmental variables. Instead of setting separate variables for
the three pieces of data we have, hoping that the position of each board
matches up in the three fields, I now set one environmental variable,
AOC_LEADERBOARDS, that holds delimited data.

The data is in the format:

board_id1,session1,join_code1::board_id2,session2,join_code2[::...]

The staff leaderboards should be included as usual in this environmental
variable. Another environment variable, AOC_STAFF_LEADERBOARD_ID, can be
used to designate which leaderboard should be used as the staff board.

I've also made some other constants configurable in this commit and
added the role ID of the Events Lead role to allow the Events Lead to
force a reload of the leaderboard cache.

1 files changed, 38 insertions, 9 deletions

diff --git a/bot/constants.py b/bot/constants.py
index d24551f6..fc9929ec 100644
--- a/bot/constants.py
+++ b/bot/constants.py
@@ -2,7 +2,7 @@ import enum
 import logging
 from datetime import datetime
 from os import environ
-from typing import NamedTuple
+from typing import Dict, NamedTuple
 
 __all__ = (
     "AdventOfCode",
@@ -29,14 +29,42 @@ __all__ = (
 log = logging.getLogger(__name__)
 
 
+class AdventOfCodeLeaderboard(NamedTuple):
+    id: str
+    session: str
+    join_code: str
+
+
+def _parse_aoc_leaderboard_env() -> Dict[str, AdventOfCodeLeaderboard]:
+    """
+    Parse the environment variable containing leaderboard information.
+
+    A leaderboard should be specified in the format `id,session,join_code`,
+    without the backticks. If more than leaderboard needs to be added to the
+    constants, separate the individual leaderboards with `::`.
+
+    Example ENV: `id1,session1,join_code1::id2,session2,join_code2`
+    """
+    raw_leaderboards = environ.get("AOC_LEADERBOARDS", "")
+    if not raw_leaderboards:
+        return {}
+
+    leaderboards = {}
+    for leaderboard in raw_leaderboards.split("::"):
+        leaderboard_id, session, join_code = leaderboard.split(",")
+        leaderboards[leaderboard_id] = AdventOfCodeLeaderboard(leaderboard_id, session, join_code)
+
+    return leaderboards
+
+
 class AdventOfCode:
-    leaderboard_cache_age_threshold_seconds = 3600
-    leaderboard_public_ids = [645282]
-    leaderboard_staff_id = 957532
-    # Public join codes in environment must be in the same order as AdventOfCode.leaderboard_public_ids
-    leaderboard_public_join_codes = environ.get("AOC_PUBLIC_JOIN_CODES", "").split(",")
-    leaderboard_staff_join_code = environ.get("AOC_STAFF_JOIN_CODE", "")
-    leaderboard_max_displayed_members = 10
+    # Information for the several leaderboards we have
+    leaderboards = _parse_aoc_leaderboard_env()
+    staff_leaderboard_id = environ.get("AOC_STAFF_LEADERBOARD_ID", "")
+
+    # Other Advent of Code constants
+    leaderboard_displayed_members = 10
+    leaderboard_cache_expiry_seconds = 1800
     year = int(environ.get("AOC_YEAR", datetime.utcnow().year))
     role_id = int(environ.get("AOC_ROLE_ID", 518565788744024082))
 
@@ -197,9 +225,10 @@ class Roles(NamedTuple):
     muted = 277914926603829249
     owner = 267627879762755584
     verified = 352427296948486144
-    helpers = 267630620367257601
+    helpers = int(environ.get("ROLE_HELPERS", 267630620367257601))
     rockstars = 458226413825294336
     core_developers = 587606783669829632
+    events_lead = 778361735739998228
 
 
 class Tokens(NamedTuple):