Update: 2026-07-09 01:01:15

backend/pricing-engine/src/db/connection.ts

@@ -129,6 +129,46 @@ export async function saveFormulas(
   await pool.execute(sql, flatParams);
 }
 
+/**
+ * لقطة insert-only من معاملات كل معادلة — لا تُستبدل أبداً، بعكس
+ * competitor_secret_formulas (UPSERT). هاي المصدر اللي يقارن عليه
+ * محرك الثبات (cron_pricing_stability_engine.php) "المعامل اليوم
+ * مقابل المعامل قبل أسبوع" لتمييز التغيير الحقيقي عن البرومو المؤقت.
+ */
+export async function saveFormulaHistory(
+  pool: mysql.Pool,
+  formulas: Array<{
+    competitorName: string;
+    countryCode: string;
+    tier: string;
+    baseFare: number;
+    kmRate: number;
+    minRate: number;
+    minFare: number;
+    rSquared: number;
+    sampleCount: number;
+  }>
+): Promise<void> {
+  if (formulas.length === 0) return;
+
+  const values = formulas.map(() => `(?, ?, ?, ?, ?, ?, ?, ?, ?, NOW())`).join(',');
+  const flatParams: (string | number)[] = [];
+
+  for (const f of formulas) {
+    flatParams.push(
+      f.competitorName, f.countryCode, f.tier,
+      f.baseFare, f.kmRate, f.minRate, f.minFare,
+      f.rSquared, f.sampleCount
+    );
+  }
+
+  const sql = `INSERT INTO competitor_formula_history
+    (competitor_name, country_code, tier, base_fare, price_per_km, price_per_min, min_fare, r_squared, sample_size, snapshotted_at)
+    VALUES ${values}`;
+
+  await pool.execute(sql, flatParams);
+}
+
 export async function saveSurgeInsights(
   pool: mysql.Pool,
   insights: Array<{

backend/pricing-engine/src/index.ts

@@ -10,7 +10,7 @@
  * Cron integration: see crontab examples in package.json scripts
  */
 
-import { getMySQL, fetchSamples, saveFormulas, saveSurgeInsights, saveSurgeZones, closeConnections } from './db/connection';
+import { getMySQL, fetchSamples, saveFormulas, saveFormulaHistory, saveSurgeInsights, saveSurgeZones, closeConnections } from './db/connection';
 import { runAnalysis } from './analysis/engine';
 import { Pool, RowDataPacket } from 'mysql2/promise';
 
@@ -236,6 +236,19 @@ async function processCompetitor(
     if (peakHours.length > 0) {
       console.log(`      Peak hours stored: [${peakHours.join(', ')}]`);
     }
+
+    // لقطة insert-only لمحرك الثبات (drift detection) — لا تُستبدل أبداً
+    await saveFormulaHistory(pool, formulas.map(f => ({
+      competitorName: f.competitorName,
+      countryCode: f.countryCode,
+      tier: f.tier,
+      baseFare: f.baseFare,
+      kmRate: f.kmRate,
+      minRate: f.minRate,
+      minFare: f.minFare,
+      rSquared: f.rSquared,
+      sampleCount: f.sampleCount,
+    })));
   }
 
   // --- Save surge insights ---