Add qualified efficiency leaderboard rankings

src/lib/server/fleet/leaderboard.ts

@@ -1,6 +1,8 @@
 import { db } from '../db/index.js';
 import { MIN_RECORDED_ROUND } from '../../match-history.js';
 import { getPersonalBestRecords } from './leaderboard-records.js';
+import { EFFICIENCY_MIN_GAMES, EFFICIENCY_MIN_KILLS, EFFICIENCY_MIN_DOWNS,
+    isEfficiencyMetric } from '../../leaderboard-efficiency.js';
 import { leaderboardMetrics, type LeaderboardEntry, type LeaderboardMap, type LeaderboardMetric,
     type LeaderboardOptions, type LeaderboardResponse } from '../../leaderboard.js';
 
@@ -25,6 +27,11 @@ export function getLeaderboard(options: LeaderboardOptions = {}): LeaderboardRes
     const scoped = `FROM leaderboard_match_players mp
         JOIN leaderboard_matches m ON m.id = mp.match_id
         WHERE ${conditions.join(' AND ')}`;
+    const qualification = isEfficiencyMetric(metric)
+        ? `WHERE measures.gamesPlayed >= ${EFFICIENCY_MIN_GAMES} AND measures.${metric} IS NOT NULL`
+            + (metric === 'headshotRate' ? ` AND measures.kills >= ${EFFICIENCY_MIN_KILLS}` : '')
+            + (metric === 'killsPerDown' ? ` AND measures.downs >= ${EFFICIENCY_MIN_DOWNS}` : '')
+        : '';
     const aggregated = `WITH totals AS (
         SELECT mp.guid, MAX(mp.highest_round) AS highestRound,
             SUM(mp.kills) AS kills, SUM(mp.rounds_survived) AS roundsSurvived,
@@ -32,12 +39,18 @@ export function getLeaderboard(options: LeaderboardOptions = {}): LeaderboardRes
             COUNT(*) AS gamesPlayed, SUM(mp.completed) AS gamesCompleted,
             MAX(mp.kills) AS bestKills, MAX(mp.best_score) AS bestScore, MAX(mp.last_seen_at) AS lastSeen
         ${scoped} GROUP BY mp.guid
+    ), measures AS (
+        SELECT totals.*, 1.0 * headshots / NULLIF(kills, 0) AS headshotRate,
+            1.0 * kills / NULLIF(downs, 0) AS killsPerDown,
+            1.0 * kills / NULLIF(gamesPlayed, 0) AS averageKills,
+            1.0 * roundsSurvived / NULLIF(gamesPlayed, 0) AS averageRounds,
+            1.0 * gamesCompleted / NULLIF(gamesPlayed, 0) AS completionRate FROM totals
     ), identities AS (
         SELECT guid, name, ROW_NUMBER() OVER (PARTITION BY guid ORDER BY last_seen_at DESC, game) AS recency
         FROM leaderboard_players WHERE game IN ('t5', 't6')
     ), ranked AS (
-        SELECT totals.*, p.name, RANK() OVER (ORDER BY totals.${metric} DESC) AS rank
-        FROM totals JOIN identities p ON p.guid = totals.guid AND p.recency = 1
+        SELECT measures.*, p.name, RANK() OVER (ORDER BY measures.${metric} DESC) AS rank
+        FROM measures JOIN identities p ON p.guid = measures.guid AND p.recency = 1 ${qualification}
     )`;
     const query = options.q?.trim() ?? '';
     const search = query ? 'WHERE instr(lower(name), lower(?)) > 0 OR instr(lower(guid), lower(?)) > 0' : '';