feat: added order to getDiffedTankStats

src/core/blitzstars/getDiffedTankStats.ts

@@ -0,0 +1,119 @@
+import { BlitzServer } from '../../constants/servers.js';
+import { AllStats } from '../../types/accountInfo.js';
+import getTankHistories, {
+  TankHistories,
+  TankHistoryRaw,
+} from './getTankHistories.js';
+
+export const emptyAllStats: AllStats = {
+  battles: 0,
+  capture_points: 0,
+  damage_dealt: 0,
+  damage_received: 0,
+  dropped_capture_points: 0,
+  frags: 0,
+  frags8p: 0,
+  hits: 0,
+  losses: 0,
+  max_frags: 0,
+  max_xp: 0,
+  shots: 0,
+  spotted: 0,
+  survived_battles: 0,
+  xp: 0,
+  win_and_survived: 0,
+  wins: 0,
+};
+
+export const emptyTankHistoryNode: TankHistoryRaw = {
+  account_id: 0,
+  battle_life_time: 0,
+  last_battle_time: 0,
+  mark_of_mastery: 0,
+  tank_id: 0,
+  all: emptyAllStats,
+};
+
+export default async function getDiffedTankStats(
+  server: BlitzServer,
+  id: number,
+  start: number,
+  end: number,
+) {
+  const history = await getTankHistories(server, id, {
+    includeLatestHistories: true,
+  });
+
+  // sort them even though most won't be used
+  const tankSortedHistory: Record<number, TankHistories> = {};
+  const tanks: number[] = [];
+  history.forEach((node) => {
+    if (!tankSortedHistory[node.tank_id]) {
+      tankSortedHistory[node.tank_id] = [node];
+      tanks.push(node.tank_id);
+    } else {
+      tankSortedHistory[node.tank_id].push(node);
+    }
+  });
+
+  // find the ones played within the range
+  const inRangeTanks = tanks.filter((tankId) =>
+    tankSortedHistory[tankId].some(
+      (node) => node.last_battle_time > start && node.last_battle_time < end,
+    ),
+  );
+  const playedTanks: number[] = [];
+
+  // fetch history node right before "start" and right before "end"
+  const diffed: Record<number, AllStats> = {};
+  inRangeTanks.forEach((tankId) => {
+    const sortedHistory = tankSortedHistory[tankId];
+    const previousIndex =
+      sortedHistory.findIndex((node) => node.last_battle_time > start) - 1;
+    const latestIndex =
+      sortedHistory.findIndex((node) => node.last_battle_time > end) - 1;
+    const previous = sortedHistory[previousIndex] ?? emptyTankHistoryNode;
+    const latest =
+      sortedHistory[latestIndex] ?? sortedHistory[sortedHistory.length - 1];
+
+    function diff(get: (allStats: AllStats) => number) {
+      return get(latest.all) - get(previous.all);
+    }
+
+    // check if there was a change in battles as games in ratings do update last_battle_time
+    if (diff((a) => a.battles) > 0) {
+      diffed[tankId] = {
+        battles: diff((a) => a.battles),
+        capture_points: diff((a) => a.capture_points),
+        damage_dealt: diff((a) => a.damage_dealt),
+        damage_received: diff((a) => a.damage_received),
+        dropped_capture_points: diff((a) => a.dropped_capture_points),
+        frags: diff((a) => a.frags),
+        frags8p: diff((a) => a.frags8p),
+        hits: diff((a) => a.hits),
+        losses: diff((a) => a.losses),
+        max_frags: latest.all.max_frags,
+        max_xp: latest.all.max_xp,
+        shots: diff((a) => a.shots),
+        spotted: diff((a) => a.spotted),
+        survived_battles: diff((a) => a.survived_battles),
+        win_and_survived: diff((a) => a.win_and_survived),
+        wins: diff((a) => a.wins),
+        xp: diff((a) => a.xp),
+      };
+
+      playedTanks.push(tankId);
+    }
+  });
+
+  const order = playedTanks.sort((a, b) => {
+    const aHistories = tankSortedHistory[a];
+    const bHistories = tankSortedHistory[b];
+    const aLatest = aHistories[aHistories.length - 1];
+    const bLatest = bHistories[bHistories.length - 1];
+
+    return bLatest.last_battle_time - aLatest.last_battle_time;
+  });
+
+  return { diffed, order };
+}