Added Section 179 Limits

server/routes/reference.js

@@ -4,6 +4,7 @@ const { requireCapability } = require('../middleware/auth');
 const { formatAssetId } = require('../services/assets');
 const assetClasses = require('../services/assetClasses');
 const zones = require('../services/zones');
+const section179Limits = require('../services/section179Limits');
 
 const router = express.Router();
 
@@ -36,6 +37,35 @@ router.delete('/depreciation-zones/:code', requireCapability('config.manage'), (
   return res.status(204).end();
 });
 
+// Annual Section 179 deduction limits & phaseout thresholds. GET is reference data; mutations
+// require config.manage. The engine caps each asset's §179 deduction at the applicable year's limit.
+router.get('/section-179-limits', (req, res) => {
+  res.json({ limits: section179Limits.list() });
+});
+
+router.post('/section-179-limits', requireCapability('config.manage'), (req, res, next) => {
+  try {
+    res.status(201).json({ limit: section179Limits.createLimit(req.body, req.user.id) });
+  } catch (error) {
+    next(error);
+  }
+});
+
+router.put('/section-179-limits/:year', requireCapability('config.manage'), (req, res, next) => {
+  try {
+    const limit = section179Limits.updateLimit(req.params.year, req.body, req.user.id);
+    if (!limit) return res.status(404).json({ error: 'Limit not found' });
+    return res.json({ limit });
+  } catch (error) {
+    return next(error);
+  }
+});
+
+router.delete('/section-179-limits/:year', requireCapability('config.manage'), (req, res) => {
+  if (!section179Limits.deleteLimit(req.params.year, req.user.id)) return res.status(404).json({ error: 'Limit not found' });
+  return res.status(204).end();
+});
+
 // Asset class catalog (seeded from the IRS tables, then user-managed). GET is reference
 // data used by the category picker; mutations require config.manage.
 router.get('/asset-classes', (req, res) => {