pelagia-portal/App/pelagia-portal/lib/geo.ts
Hardik bea798324c feat(inventory): Sites, GST lookup, distance sorting, cart, inventory tracking
Schema:
- Site model (name, code, address, lat/lng, isActive)
- ItemInventory model (quantity per product per site, unique[productId,siteId])
- ItemConsumption model (daily usage per product per site)
- Vendor: add latitude, longitude
- Vessel: add siteId (home port)
- PurchaseOrder: add siteId (delivery site)

Permissions: add manage_sites to MANAGER and ADMIN

Sidebar: Inventory section (Vendors, Items, Vessels, Sites, Cart)
for MANAGER and ADMIN; old admin items reorganised

Lib:
- lib/geo.ts: Haversine distance + Nominatim pincode geocoding
- lib/gst-lookup.ts: AbhiAPI GSTIN lookup (ABHIAPI_KEY env var)
- lib/cart.ts: localStorage cart (add/remove/clear + cart-updated event)

API: GET /api/gst?gstin= — validates GSTIN, fetches via AbhiAPI,
  geocodes pincode via Nominatim, returns name/address/lat/lng

Vendor form: GSTIN "Look up" button auto-fills name, address,
  and lat/lng; lat/lng fields editable as override

Sites: full CRUD at /admin/sites; detail page with inventory
  table, consumption recording form, BarChart (stock) +
  LineChart (30-day consumption), linked vessels, recent POs

Vessels: detail page at /admin/vessels/[id] with "Create PO"
  button, PO history and spend summary; accessible to MANAGER

Items detail: price comparison BarChart; site distance filter
  (dropdown → re-render sorted by Haversine distance); "Add to
  Cart" per vendor row; stock-by-site section

Cart: /inventory/cart — localStorage CartView; qty edit, remove,
  clear; "Create PO →" encodes cart into /po/new?cart=...

Receipt/delivery: confirmReceipt now upserts ItemInventory
  (increment qty) for each linked line item, using PO siteId or
  vessel home site as the delivery location

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-14 11:50:11 +05:30

30 lines
1.2 KiB
TypeScript

/** Haversine distance between two lat/lng points, in kilometres. */
export function distanceKm(
lat1: number, lon1: number,
lat2: number, lon2: number
): number {
const R = 6371;
const dLat = ((lat2 - lat1) * Math.PI) / 180;
const dLon = ((lon2 - lon1) * Math.PI) / 180;
const a =
Math.sin(dLat / 2) ** 2 +
Math.cos((lat1 * Math.PI) / 180) *
Math.cos((lat2 * Math.PI) / 180) *
Math.sin(dLon / 2) ** 2;
return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
}
export function formatDistance(km: number): string {
return km < 1 ? `${Math.round(km * 1000)} m` : `${km.toFixed(0)} km`;
}
/** Geocode an Indian pincode to lat/lng using Nominatim (free, no key). */
export async function geocodePincode(pincode: string): Promise<{ lat: number; lng: number } | null> {
try {
const url = `https://nominatim.openstreetmap.org/search?postalcode=${encodeURIComponent(pincode)}&countrycodes=in&format=json&limit=1`;
const res = await fetch(url, { headers: { "User-Agent": "PelagiaPortal/1.0" } });
const data = await res.json();
if (data[0]) return { lat: parseFloat(data[0].lat), lng: parseFloat(data[0].lon) };
} catch { /* ignore */ }
return null;
}