103 lines
3.7 KiB
TypeScript
103 lines
3.7 KiB
TypeScript
import type { FetchedStandingsRecord, StandingsSyncAdapter } from "./types";
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import {
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flattenEspnStandings,
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parseConferenceRank,
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sortByWinLoss,
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statsMap,
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type EspnStandingsResponse,
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} from "./espn";
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const MLB_STANDINGS_URL =
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"https://site.api.espn.com/apis/v2/sports/baseball/mlb/standings";
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// "American League" → "AL", "National League" → "NL"
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function abbreviateLeague(name: string): string {
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if (name.startsWith("American")) return "AL";
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if (name.startsWith("National")) return "NL";
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return name;
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}
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// "American League East" → "AL East", "National League West" → "NL West"
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function abbreviateDivision(name: string): string {
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return name
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.replace(/^American League /, "AL ")
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.replace(/^National League /, "NL ");
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}
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export class MlbStandingsAdapter implements StandingsSyncAdapter {
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async fetchStandings(): Promise<FetchedStandingsRecord[]> {
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const response = await fetch(MLB_STANDINGS_URL);
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if (!response.ok) {
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throw new Error(`MLB standings API returned ${response.status}: ${response.statusText}`);
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}
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const json = (await response.json()) as EspnStandingsResponse;
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const flattened = flattenEspnStandings(json);
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if (flattened.length === 0) {
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throw new Error("MLB standings API returned no entries — response shape may have changed");
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}
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// Pre-build statsMap once per entry so the sort doesn't rebuild it on every comparison.
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const withSm = flattened.map(({ entry, conference, division }) => ({
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entry,
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conference,
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division,
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sm: statsMap(entry.stats),
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}));
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// Compute divisionRank: rank each team within its own division by win/loss.
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const divisionRankMap = new Map<string, number>();
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const divisionGroups = new Map<string, typeof withSm>();
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for (const item of withSm) {
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const key = item.division;
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if (!divisionGroups.has(key)) divisionGroups.set(key, []);
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divisionGroups.get(key)?.push(item);
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}
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for (const divEntries of divisionGroups.values()) {
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// Use the ESPN entry order within each division — ESPN already applies correct tiebreakers.
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divEntries.forEach((e, i) => {
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divisionRankMap.set(e.entry.team.id, i + 1);
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});
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}
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const sorted = [...withSm].toSorted(sortByWinLoss);
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return sorted.map(({ entry, conference, division, sm }, leagueIdx): FetchedStandingsRecord => {
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const wins = sm.get("wins")?.value ?? 0;
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const losses = sm.get("losses")?.value ?? 0;
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// Fall back to computing win% from wins/losses if ESPN omits the stat.
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const winPctStat = sm.get("winPercent")?.value ?? sm.get("winPct")?.value;
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const winPct = winPctStat ?? (wins + losses > 0 ? wins / (wins + losses) : 0);
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const gamesBehind = sm.get("gamesBehind")?.value;
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const streak = sm.get("streak")?.displayValue ?? sm.get("streakSummary")?.displayValue;
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const lastTen =
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sm.get("Last Ten Games")?.displayValue ?? sm.get("L10")?.displayValue ?? undefined;
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const homeRecord = sm.get("Home")?.displayValue ?? undefined;
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const awayRecord = sm.get("Road")?.displayValue ?? undefined;
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const abbreviatedDiv = abbreviateDivision(division);
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return {
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teamName: entry.team.displayName,
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externalTeamId: entry.team.id,
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wins: Math.round(wins),
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losses: Math.round(losses),
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winPct,
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gamesPlayed: Math.round(wins) + Math.round(losses),
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gamesBack: gamesBehind,
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conference: abbreviateLeague(conference),
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division: abbreviatedDiv || undefined,
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conferenceRank: parseConferenceRank(sm),
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divisionRank: divisionRankMap.get(entry.team.id),
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leagueRank: leagueIdx + 1,
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streak,
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lastTen,
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homeRecord,
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awayRecord,
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};
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});
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}
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}
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