feat: add ranking table sync and API endpoints

Sync Ranking table from SQL Server to PostgreSQL with ranking_ca,
ranking_qte, ranking_mag_* metrics. Expose via /api/ranking and
integrate into /api/articles/:id/referentiel response.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app.js

@@ -10,6 +10,7 @@ const stockRouter       = require('./routes/stock');
 const mouvementsRouter  = require('./routes/mouvements');
 const performanceRouter = require('./routes/performance');
 const syncRouter        = require('./routes/sync');
+const rankingRouter     = require('./routes/ranking');
 
 const app = express();
 app.use(express.json());
@@ -34,6 +35,7 @@ app.use('/api/stock',        stockRouter);
 app.use('/api/mouvements',   mouvementsRouter);
 app.use('/api/performance',  performanceRouter);
 app.use('/api/sync',         syncRouter);
+app.use('/api/ranking',      rankingRouter);
 
 // 404
 app.use((req, res) => {

src/routes/articles.js

@@ -222,10 +222,27 @@ router.get('/:id/referentiel', async (req, res) => {
       notes = notesRes.rows;
     } catch (e) { /* Table optionnelle */ }
 
+    let ranking = [];
+    try {
+      const rankRes = await pool.query(`
+        SELECT r.gencod, r.site, r.ranking_ca, r.ranking_qte,
+               r.ranking_mag_ca, r.ranking_mag_qte, r.ranking_mag_marge,
+               r.foucentrale, r.nomfoucentrale,
+               r.pv_calcule, r.pv_mag, r.pv_cen,
+               r.date_maj, r.date_calcul_mag
+        FROM ranking r
+        JOIN art_gtin g ON g.gtin = r.gencod
+        WHERE g.idarticle = $1
+        ORDER BY r.site
+      `, [id]);
+      ranking = rankRes.rows;
+    } catch (e) { /* Table optionnelle */ }
+
     res.json({
       article: article.rows[0],
       gtins: gtins.rows,
       gammes: gammes.rows,
+      ranking,
       stock: stock.rows,
       stock_remballe: stockRemballe,
       prix: {

src/routes/ranking.js

@@ -0,0 +1,66 @@
+const express = require('express');
+const router = express.Router();
+const { getPool } = require('../config/database');
+
+// GET /api/ranking?gencod=&codein=&site=&foucentrale=&limit=
+router.get('/', async (req, res) => {
+  try {
+    const pool = getPool();
+    const { gencod = '', codein = '', site = '', foucentrale = '', limit = 50 } = req.query;
+    const limitNum = Math.max(1, Math.min(parseInt(limit) || 50, 500));
+
+    const result = await pool.query(`
+      SELECT
+        r.gencod, r.site, r.libelle,
+        r.foucentrale, r.nomfoucentrale,
+        r.ranking_ca, r.ranking_qte,
+        r.ranking_mag_ca, r.ranking_mag_qte, r.ranking_mag_marge,
+        r.pv_calcule, r.pv_mag, r.pv_cen,
+        r.codefamille, r.libellefamille,
+        r.date_maj, r.date_calcul_mag,
+        a.no_id AS art_no_id, a.codein
+      FROM ranking r
+      LEFT JOIN art_gtin g ON g.gtin = r.gencod
+      LEFT JOIN articles a ON a.no_id = g.idarticle
+      WHERE ($1 = '' OR r.gencod = $1)
+        AND ($2 = '' OR a.codein = $2)
+        AND ($3 = '' OR r.site LIKE $3)
+        AND ($4 = '' OR r.foucentrale LIKE $4)
+      ORDER BY r.ranking_ca ASC NULLS LAST
+      LIMIT $5
+    `, [gencod, codein, `%${site}%`, `%${foucentrale}%`, limitNum]);
+
+    res.json({ count: result.rows.length, ranking: result.rows });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// GET /api/ranking/article/:id - Ranking pour un article (par no_id)
+router.get('/article/:id', async (req, res) => {
+  try {
+    const pool = getPool();
+    const artNoId = req.params.id;
+
+    const result = await pool.query(`
+      SELECT
+        r.gencod, r.site, r.libelle,
+        r.foucentrale, r.nomfoucentrale,
+        r.ranking_ca, r.ranking_qte,
+        r.ranking_mag_ca, r.ranking_mag_qte, r.ranking_mag_marge,
+        r.pv_calcule, r.pv_mag, r.pv_cen,
+        r.codefamille, r.libellefamille,
+        r.date_maj, r.date_calcul_mag
+      FROM ranking r
+      JOIN art_gtin g ON g.gtin = r.gencod
+      WHERE g.idarticle = $1
+      ORDER BY r.site
+    `, [artNoId]);
+
+    res.json({ artNoId, ranking: result.rows });
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+module.exports = router;