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@@ -1 +1,323 @@
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const express = require('express');
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const router = express.Router();
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const { parseValue } = require('../utils/apiHelpers'); // Adjust path if needed
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// --- Configuration & Helpers ---
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const DEFAULT_PAGE_LIMIT = 50;
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const MAX_PAGE_LIMIT = 200;
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// Maps query keys to DB columns in vendor_metrics
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const COLUMN_MAP = {
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vendorName: { dbCol: 'vm.vendor_name', type: 'string' },
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productCount: { dbCol: 'vm.product_count', type: 'number' },
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activeProductCount: { dbCol: 'vm.active_product_count', type: 'number' },
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replenishableProductCount: { dbCol: 'vm.replenishable_product_count', type: 'number' },
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currentStockUnits: { dbCol: 'vm.current_stock_units', type: 'number' },
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currentStockCost: { dbCol: 'vm.current_stock_cost', type: 'number' },
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currentStockRetail: { dbCol: 'vm.current_stock_retail', type: 'number' },
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onOrderUnits: { dbCol: 'vm.on_order_units', type: 'number' },
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onOrderCost: { dbCol: 'vm.on_order_cost', type: 'number' },
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poCount365d: { dbCol: 'vm.po_count_365d', type: 'number' },
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avgLeadTimeDays: { dbCol: 'vm.avg_lead_time_days', type: 'number' },
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sales7d: { dbCol: 'vm.sales_7d', type: 'number' },
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revenue7d: { dbCol: 'vm.revenue_7d', type: 'number' },
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sales30d: { dbCol: 'vm.sales_30d', type: 'number' },
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revenue30d: { dbCol: 'vm.revenue_30d', type: 'number' },
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profit30d: { dbCol: 'vm.profit_30d', type: 'number' },
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cogs30d: { dbCol: 'vm.cogs_30d', type: 'number' },
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sales365d: { dbCol: 'vm.sales_365d', type: 'number' },
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revenue365d: { dbCol: 'vm.revenue_365d', type: 'number' },
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lifetimeSales: { dbCol: 'vm.lifetime_sales', type: 'number' },
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lifetimeRevenue: { dbCol: 'vm.lifetime_revenue', type: 'number' },
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avgMargin30d: { dbCol: 'vm.avg_margin_30d', type: 'number' },
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// Growth metrics
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salesGrowth30dVsPrev: { dbCol: 'vm.sales_growth_30d_vs_prev', type: 'number' },
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revenueGrowth30dVsPrev: { dbCol: 'vm.revenue_growth_30d_vs_prev', type: 'number' },
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// Add aliases if needed for frontend compatibility
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name: { dbCol: 'vm.vendor_name', type: 'string' },
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leadTime: { dbCol: 'vm.avg_lead_time_days', type: 'number' },
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// Add status for filtering
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status: { dbCol: 'vendor_status', type: 'string' },
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};
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function getSafeColumnInfo(queryParamKey) {
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return COLUMN_MAP[queryParamKey] || null;
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}
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// --- Route Handlers ---
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// GET /vendors-aggregate/filter-options (Just vendors list for now)
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router.get('/filter-options', async (req, res) => {
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const pool = req.app.locals.pool;
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console.log('GET /vendors-aggregate/filter-options');
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try {
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// Get vendor names
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const { rows: vendorRows } = await pool.query(`
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SELECT DISTINCT vendor_name FROM public.vendor_metrics ORDER BY vendor_name
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`);
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// Get status values - calculate them since they're derived
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const { rows: statusRows } = await pool.query(`
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SELECT DISTINCT
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CASE
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WHEN po_count_365d > 0 AND sales_30d > 0 THEN 'active'
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WHEN po_count_365d > 0 THEN 'inactive'
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ELSE 'pending'
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END as status
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FROM public.vendor_metrics
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ORDER BY status
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`);
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res.json({
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vendors: vendorRows.map(r => r.vendor_name),
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statuses: statusRows.map(r => r.status)
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});
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} catch(error) {
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console.error('Error fetching vendor filter options:', error);
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res.status(500).json({ error: 'Failed to fetch filter options' });
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}
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});
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// GET /vendors-aggregate/stats (Overall vendor stats)
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router.get('/stats', async (req, res) => {
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const pool = req.app.locals.pool;
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console.log('GET /vendors-aggregate/stats');
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try {
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// Get basic vendor stats from aggregate table
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const { rows: [stats] } = await pool.query(`
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SELECT
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COUNT(*) AS total_vendors,
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SUM(active_product_count) AS total_active_products,
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SUM(current_stock_cost) AS total_stock_value,
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SUM(on_order_cost) AS total_on_order_value,
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AVG(NULLIF(avg_lead_time_days, 0)) AS overall_avg_lead_time
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FROM public.vendor_metrics vm
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`);
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// Count active vendors based on criteria (from old vendors.js)
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const { rows: [activeStats] } = await pool.query(`
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SELECT
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COUNT(DISTINCT CASE
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WHEN po_count_365d > 0
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THEN vendor_name
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END) as active_vendors
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FROM public.vendor_metrics
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`);
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// Get overall cost metrics from purchase orders
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const { rows: [overallCostMetrics] } = await pool.query(`
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SELECT
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ROUND((SUM(ordered * po_cost_price)::numeric / NULLIF(SUM(ordered), 0)), 2) as avg_unit_cost,
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ROUND(SUM(ordered * po_cost_price)::numeric, 3) as total_spend
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FROM purchase_orders
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WHERE po_cost_price IS NOT NULL
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AND ordered > 0
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AND vendor IS NOT NULL AND vendor != ''
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`);
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res.json({
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totalVendors: parseInt(stats?.total_vendors || 0),
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activeVendors: parseInt(activeStats?.active_vendors || 0),
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totalActiveProducts: parseInt(stats?.total_active_products || 0),
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totalValue: parseFloat(stats?.total_stock_value || 0),
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totalOnOrderValue: parseFloat(stats?.total_on_order_value || 0),
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avgLeadTime: parseFloat(stats?.overall_avg_lead_time || 0),
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avgUnitCost: parseFloat(overallCostMetrics?.avg_unit_cost || 0),
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totalSpend: parseFloat(overallCostMetrics?.total_spend || 0)
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});
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} catch (error) {
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console.error('Error fetching vendor stats:', error);
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res.status(500).json({ error: 'Failed to fetch vendor stats.' });
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}
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});
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// GET /vendors-aggregate/ (List vendors)
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router.get('/', async (req, res) => {
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const pool = req.app.locals.pool;
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console.log('GET /vendors-aggregate received query:', req.query);
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try {
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// --- Pagination ---
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let page = parseInt(req.query.page, 10) || 1;
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let limit = parseInt(req.query.limit, 10) || DEFAULT_PAGE_LIMIT;
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limit = Math.min(limit, MAX_PAGE_LIMIT);
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const offset = (page - 1) * limit;
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// --- Sorting ---
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const sortQueryKey = req.query.sort || 'vendorName'; // Default sort
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const sortColumnInfo = getSafeColumnInfo(sortQueryKey);
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const sortColumn = sortColumnInfo ? sortColumnInfo.dbCol : 'vm.vendor_name';
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const sortDirection = req.query.order?.toLowerCase() === 'desc' ? 'DESC' : 'ASC';
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const nullsOrder = (sortDirection === 'ASC' ? 'NULLS FIRST' : 'NULLS LAST');
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const sortClause = `ORDER BY ${sortColumn} ${sortDirection} ${nullsOrder}`;
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// --- Filtering ---
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const conditions = [];
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const params = [];
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let paramCounter = 1;
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// Build conditions based on req.query, using COLUMN_MAP and parseValue
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for (const key in req.query) {
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if (['page', 'limit', 'sort', 'order'].includes(key)) continue;
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let filterKey = key;
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let operator = '='; // Default operator
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const value = req.query[key];
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const operatorMatch = key.match(/^(.*)_(eq|ne|gt|gte|lt|lte|like|ilike|between|in)$/);
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if (operatorMatch) {
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filterKey = operatorMatch[1];
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operator = operatorMatch[2];
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}
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const columnInfo = getSafeColumnInfo(filterKey);
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if (columnInfo) {
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const dbColumn = columnInfo.dbCol;
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const valueType = columnInfo.type;
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try {
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let conditionFragment = '';
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let needsParam = true;
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switch (operator.toLowerCase()) { // Normalize operator
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case 'eq': operator = '='; break;
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case 'ne': operator = '<>'; break;
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case 'gt': operator = '>'; break;
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case 'gte': operator = '>='; break;
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case 'lt': operator = '<'; break;
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case 'lte': operator = '<='; break;
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case 'like': operator = 'LIKE'; needsParam=false; params.push(`%${parseValue(value, valueType)}%`); break;
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case 'ilike': operator = 'ILIKE'; needsParam=false; params.push(`%${parseValue(value, valueType)}%`); break;
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case 'between':
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const [val1, val2] = String(value).split(',');
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if (val1 !== undefined && val2 !== undefined) {
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conditionFragment = `${dbColumn} BETWEEN $${paramCounter++} AND $${paramCounter++}`;
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params.push(parseValue(val1, valueType), parseValue(val2, valueType));
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needsParam = false;
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} else continue;
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break;
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case 'in':
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const inValues = String(value).split(',');
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if (inValues.length > 0) {
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const placeholders = inValues.map(() => `$${paramCounter++}`).join(', ');
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conditionFragment = `${dbColumn} IN (${placeholders})`;
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params.push(...inValues.map(v => parseValue(v, valueType)));
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needsParam = false;
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} else continue;
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break;
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default: operator = '='; break;
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}
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if (needsParam) {
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conditionFragment = `${dbColumn} ${operator} $${paramCounter++}`;
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params.push(parseValue(value, valueType));
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} else if (!conditionFragment) { // For LIKE/ILIKE
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conditionFragment = `${dbColumn} ${operator} $${paramCounter++}`;
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}
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if (conditionFragment) {
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conditions.push(`(${conditionFragment})`);
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}
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} catch (parseError) {
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console.warn(`Skipping filter for key "${key}" due to parsing error: ${parseError.message}`);
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if (needsParam) paramCounter--;
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}
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} else {
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console.warn(`Invalid filter key ignored: ${key}`);
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}
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}
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// --- Execute Queries ---
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const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
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// Status calculation from vendors.js
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const statusCase = `
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CASE
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WHEN po_count_365d > 0 AND sales_30d > 0 THEN 'active'
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WHEN po_count_365d > 0 THEN 'inactive'
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ELSE 'pending'
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END as vendor_status
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`;
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const baseSql = `
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FROM (
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SELECT
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vm.*,
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${statusCase}
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FROM public.vendor_metrics vm
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) vm
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${whereClause}
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`;
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const countSql = `SELECT COUNT(*) AS total ${baseSql}`;
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const dataSql = `
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WITH vendor_data AS (
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SELECT
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vm.*,
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${statusCase}
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FROM public.vendor_metrics vm
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)
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SELECT
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vm.*,
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COALESCE(po.avg_unit_cost, 0) as avg_unit_cost,
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COALESCE(po.total_spend, 0) as total_spend
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FROM vendor_data vm
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LEFT JOIN (
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SELECT
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vendor,
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ROUND((SUM(ordered * po_cost_price)::numeric / NULLIF(SUM(ordered), 0)), 2) as avg_unit_cost,
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ROUND(SUM(ordered * po_cost_price)::numeric, 3) as total_spend
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FROM purchase_orders
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WHERE po_cost_price IS NOT NULL AND ordered > 0
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GROUP BY vendor
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) po ON vm.vendor_name = po.vendor
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${whereClause}
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${sortClause}
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LIMIT $${paramCounter} OFFSET $${paramCounter + 1}
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`;
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const dataParams = [...params, limit, offset];
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console.log("Count SQL:", countSql, params);
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console.log("Data SQL:", dataSql, dataParams);
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const [countResult, dataResult] = await Promise.all([
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pool.query(countSql, params),
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pool.query(dataSql, dataParams)
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]);
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const total = parseInt(countResult.rows[0].total, 10);
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const vendors = dataResult.rows.map(row => {
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// Create a new object with both snake_case and camelCase keys
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const transformedRow = { ...row }; // Start with original data
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for (const key in row) {
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// Skip null/undefined values
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if (row[key] === null || row[key] === undefined) {
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continue; // Original already has the null value
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}
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// Transform keys to match frontend expectations (add camelCase versions)
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// First handle cases like sales_7d -> sales7d
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let camelKey = key.replace(/_(\d+[a-z])/g, '$1');
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// Then handle regular snake_case -> camelCase
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camelKey = camelKey.replace(/_([a-z])/g, (_, letter) => letter.toUpperCase());
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if (camelKey !== key) { // Only add if different from original
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transformedRow[camelKey] = row[key];
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}
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}
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return transformedRow;
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});
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// --- Respond ---
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res.json({
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vendors,
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pagination: { total, pages: Math.ceil(total / limit), currentPage: page, limit },
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});
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} catch (error) {
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console.error('Error fetching vendor metrics list:', error);
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res.status(500).json({ error: 'Failed to fetch vendor metrics.' });
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}
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});
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// GET /vendors-aggregate/:name (Get single vendor metric)
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// Implement if needed, remember to URL-decode the name parameter
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module.exports = router;
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