feat: implement TTR preview functionality with caching and UI integration

backend/controllers/matchController.js

@@ -2,6 +2,29 @@ import MatchService from '../services/matchService.js';
 import fs from 'fs';
 import { emitScheduleMatchUpdated } from '../services/socketService.js';
 import { devLog } from '../utils/logger.js';
+import Match from '../models/Match.js';
+import Member from '../models/Member.js';
+import Club from '../models/Club.js';
+import { checkAccess } from '../utils/userUtils.js';
+import myTischtennisService from '../services/myTischtennisService.js';
+import myTischtennisClient from '../clients/myTischtennisClient.js';
+import { Op } from 'sequelize';
+import sequelize from '../database.js';
+
+const normalizeTtrName = (value) => String(value || '')
+    .normalize('NFKD').replace(/[\u0300-\u036f]/g, '')
+    .replace(/[^\p{L}\p{N}]+/gu, ' ').trim().toLocaleLowerCase('de-DE');
+
+const playerName = (player) => [player?.firstname || player?.firstName, player?.lastname || player?.lastName]
+    .filter(Boolean).join(' ').trim();
+
+const findClubForTeam = (clubs, teamName) => {
+    const teamKey = normalizeTtrName(teamName);
+    return clubs.find((club) => {
+        const clubKey = normalizeTtrName(club.name);
+        return clubKey && (teamKey === clubKey || teamKey.startsWith(`${clubKey} `) || clubKey.startsWith(`${teamKey} `));
+    }) || null;
+};
 export const uploadCSV = async (req, res) => {
     try {
         const clubId = req.body?.clubId ?? req.query?.clubId;
@@ -184,3 +207,90 @@ export const getMatchPlayers = async (req, res) => {
         return res.status(500).json({ error: 'Failed to retrieve match players' });
     }
 };
+
+/**
+ * Resolves the current TTR snapshots for a nuScore lineup. Local member data
+ * is preferred. Missing opponent data is fetched from the club ranking when
+ * the opposing club is also known in the database.
+ */
+export const getTtrPreviewPlayers = async (req, res) => {
+    try {
+        const { authcode: userToken } = req.headers;
+        const match = await Match.findByPk(req.params.matchId);
+        if (!match) return res.status(404).json({ error: 'Spiel nicht gefunden' });
+        await checkAccess(userToken, match.clubId);
+
+        // The product uses German match dates; do not roll the cache over at
+        // UTC midnight while a late-evening match is still in progress.
+        const snapshotDate = new Intl.DateTimeFormat('sv-SE', { timeZone: 'Europe/Berlin' }).format(new Date());
+        const [cachedRows] = await sequelize.query(
+            'SELECT payload FROM match_ttr_preview_cache WHERE match_id = :matchId AND snapshot_date = :snapshotDate LIMIT 1',
+            { replacements: { matchId: match.id, snapshotDate } }
+        );
+        if (cachedRows.length) {
+            const payload = typeof cachedRows[0].payload === 'string' ? JSON.parse(cachedRows[0].payload) : cachedRows[0].payload;
+            return res.json({ ...payload, cached: true, snapshotDate });
+        }
+
+        const sides = ['home', 'guest'];
+        const lineup = Object.fromEntries(sides.map((side) => [side, Array.isArray(req.body?.[`${side}Players`]) ? req.body[`${side}Players`] : []]));
+        const allPlayers = sides.flatMap((side) => lineup[side].map((player) => ({ side, player })));
+        const members = await Member.findAll({ where: { ttr: { [Op.ne]: null } } });
+        const byExternalId = new Map();
+        const byName = new Map();
+        members.forEach((member) => {
+            if (member.myTischtennisPlayerId) byExternalId.set(String(member.myTischtennisPlayerId), member);
+            const key = normalizeTtrName(`${member.firstName} ${member.lastName}`);
+            if (key && !byName.has(key)) byName.set(key, member);
+            else if (key) byName.set(key, null);
+        });
+
+        const resolved = new Map();
+        for (const { side, player } of allPlayers) {
+            const id = player?.nuLigaPersonId || player?.personId || player?.id;
+            const member = (id && byExternalId.get(String(id))) || byName.get(normalizeTtrName(playerName(player)));
+            if (member?.ttr != null) {
+                resolved.set(`${side}:${normalizeTtrName(playerName(player))}`, {
+                    ttr: Number(member.ttr), adjustmentConstant: Number(member.ttrAdjustmentConstant || 16), source: 'database'
+                });
+            }
+        }
+
+        const clubs = await Club.findAll({ where: { associationMemberNumber: { [Op.ne]: null }, myTischtennisFedNickname: { [Op.ne]: null } } });
+        let session = null;
+        for (const side of sides) {
+            const pending = lineup[side].filter((player) => !resolved.has(`${side}:${normalizeTtrName(playerName(player))}`));
+            if (!pending.length) continue;
+            const club = findClubForTeam(clubs, req.body?.[`${side}TeamName`]);
+            if (!club) continue;
+            try {
+                session ||= await myTischtennisService.getSession(req.user.id);
+                const rankings = await myTischtennisClient.getClubRankings(session.cookie, club.associationMemberNumber, club.myTischtennisFedNickname);
+                if (!rankings.success) continue;
+                const rankingByName = new Map(rankings.entries.map((entry) => [normalizeTtrName(`${entry.firstname} ${entry.lastname}`), entry]));
+                pending.forEach((player) => {
+                    const entry = rankingByName.get(normalizeTtrName(playerName(player)));
+                    if (Number.isFinite(Number(entry?.fedRank))) {
+                        resolved.set(`${side}:${normalizeTtrName(playerName(player))}`, { ttr: Number(entry.fedRank), adjustmentConstant: 16, source: 'myTischtennis' });
+                    }
+                });
+            } catch (_error) {
+                // Keep the player explicitly unresolved; the report remains usable.
+            }
+        }
+
+        const payload = { players: allPlayers.map(({ side, player }) => {
+            const value = resolved.get(`${side}:${normalizeTtrName(playerName(player))}`);
+            return { side, name: playerName(player), nuLigaPersonId: player?.nuLigaPersonId || null, ttr: value?.ttr ?? null, adjustmentConstant: value?.adjustmentConstant ?? null, source: value?.source || 'unavailable' };
+        }) };
+        await sequelize.query(
+            `INSERT INTO match_ttr_preview_cache (match_id, snapshot_date, payload, created_at, updated_at)
+             VALUES (:matchId, :snapshotDate, :payload, NOW(), NOW())`,
+            { replacements: { matchId: match.id, snapshotDate, payload: JSON.stringify(payload) } }
+        );
+        return res.json({ ...payload, cached: false, snapshotDate });
+    } catch (error) {
+        console.error('[getTtrPreviewPlayers]', error);
+        return res.status(error.statusCode || 500).json({ error: error.message || 'TTR-Werte konnten nicht geladen werden' });
+    }
+};