Persist cutting rules in database

backend/services/cuttingSettingsService.js

@@ -0,0 +1,128 @@
+const { pool } = require('../db');
+
+const FAMILY_KEYS = ['BLCS', 'BLOS', 'BLMC', 'BLPM'];
+const FAMILY_KEY_SET = new Set(FAMILY_KEYS);
+
+const normalizeFamilyKey = (value) => {
+    const familyKey = String(value || '').trim().toUpperCase();
+    return FAMILY_KEY_SET.has(familyKey) ? familyKey : '';
+};
+
+const normalizeNumber = (value) => {
+    const number = Number(value);
+    return Number.isFinite(number) && number > 0 ? number : null;
+};
+
+const normalizeText = (value) => String(value || '').replace(/\s+/g, ' ').trim();
+
+const normalizeFamilyYields = (familyYields = {}) => {
+    return FAMILY_KEYS.reduce((normalized, familyKey) => {
+        const unitsPerRoll = normalizeNumber(familyYields[familyKey]);
+        if (unitsPerRoll) normalized[familyKey] = unitsPerRoll;
+        return normalized;
+    }, {});
+};
+
+const normalizeProductOverrides = (productOverrides = {}) => {
+    return Object.entries(productOverrides).reduce((normalized, [productId, override]) => {
+        const normalizedProductId = normalizeText(productId);
+        if (!normalizedProductId || !override || typeof override !== 'object') return normalized;
+
+        const familyKey = normalizeFamilyKey(override.familyKey);
+        const color = normalizeText(override.color);
+        const size = normalizeText(override.size).toUpperCase();
+
+        if (!familyKey && !color && !size) return normalized;
+
+        normalized[normalizedProductId] = {
+            familyKey,
+            color,
+            size
+        };
+
+        return normalized;
+    }, {});
+};
+
+const listCuttingSettings = async () => {
+    const [familyResult, overrideResult] = await Promise.all([
+        pool.query(`
+            SELECT family_key, units_per_roll
+            FROM cutting_family_rules
+            WHERE units_per_roll IS NOT NULL AND units_per_roll > 0
+            ORDER BY family_key
+        `),
+        pool.query(`
+            SELECT product_id, family_key, color, size
+            FROM cutting_product_overrides
+            ORDER BY product_id
+        `)
+    ]);
+
+    return {
+        familyYields: familyResult.rows.reduce((settings, row) => {
+            settings[row.family_key] = Number(row.units_per_roll);
+            return settings;
+        }, {}),
+        productOverrides: overrideResult.rows.reduce((settings, row) => {
+            settings[row.product_id] = {
+                familyKey: row.family_key || '',
+                color: row.color || '',
+                size: row.size || ''
+            };
+            return settings;
+        }, {})
+    };
+};
+
+const saveCuttingSettings = async ({ familyYields = {}, productOverrides = {} }) => {
+    const normalizedFamilyYields = normalizeFamilyYields(familyYields);
+    const normalizedProductOverrides = normalizeProductOverrides(productOverrides);
+    const client = await pool.connect();
+
+    try {
+        await client.query('BEGIN');
+
+        await client.query('DELETE FROM cutting_family_rules');
+        for (const [familyKey, unitsPerRoll] of Object.entries(normalizedFamilyYields)) {
+            await client.query(`
+                INSERT INTO cutting_family_rules (family_key, units_per_roll, updated_at)
+                VALUES ($1, $2, CURRENT_TIMESTAMP)
+            `, [familyKey, unitsPerRoll]);
+        }
+
+        await client.query('DELETE FROM cutting_product_overrides');
+        for (const [productId, override] of Object.entries(normalizedProductOverrides)) {
+            await client.query(`
+                INSERT INTO cutting_product_overrides (product_id, family_key, color, size, updated_at)
+                VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
+            `, [
+                productId,
+                override.familyKey || null,
+                override.color || null,
+                override.size || null
+            ]);
+        }
+
+        await client.query('COMMIT');
+
+        return {
+            familyYields: normalizedFamilyYields,
+            productOverrides: normalizedProductOverrides
+        };
+    } catch (error) {
+        await client.query('ROLLBACK');
+        throw error;
+    } finally {
+        client.release();
+    }
+};
+
+module.exports = {
+    FAMILY_KEYS,
+    listCuttingSettings,
+    normalizeFamilyKey,
+    normalizeFamilyYields,
+    normalizeProductOverrides,
+    saveCuttingSettings
+};