Segmentational Analysis

src/utils/RulesMerger.js

@@ -0,0 +1,37 @@
+import { ScoringRules } from '../config/ScoringConfig.js';
+
+/**
+ * RuleMerger ensures that we apply sector-specific overrides
+ * to base asset rules without polluting the individual Asset or Scorer logic.
+ */
+export const RuleMerger = {
+  getRulesForAsset(type, metrics) {
+    // 1. Start with a deep clone of the base rules for this asset type (STOCK, ETF, etc.)
+    const baseRules = ScoringRules[type];
+    if (!baseRules) throw new Error(`No configuration found for type: ${type}`);
+
+    let finalRules = JSON.parse(JSON.stringify(baseRules));
+
+    // 2. If it's a stock and we have a sector, merge the overrides
+    if (type === 'STOCK' && metrics.sector) {
+      const sectorKey = metrics.sector.toUpperCase();
+      const overrides = baseRules.SECTOR_OVERRIDE?.[sectorKey];
+
+      if (overrides) {
+        // Merge gates, weights, and thresholds deeply
+        finalRules.gates = { ...finalRules.gates, ...overrides.gates };
+        finalRules.weights = { ...finalRules.weights, ...overrides.weights };
+        finalRules.thresholds = {
+          ...finalRules.thresholds,
+          ...overrides.thresholds,
+        };
+      }
+    }
+
+    // 3. Cleanup: Remove the override configuration from the final object
+    // so the Scorer works with a clean, flat rule set.
+    delete finalRules.SECTOR_OVERRIDE;
+
+    return finalRules;
+  },
+};