init

web/lib/bill-view.ts

@@ -0,0 +1,73 @@
+export const BILL_NOT_FOUND =
+  "Bill not found yet. If you just received the SMS, wait a moment and refresh.";
+
+export type BillLine = {
+  description: string;
+  qty: number | string | null;
+  unitPrice: number;
+  lineTotal: number;
+};
+
+export type BillView = {
+  shopName: string;
+  address: string;
+  phone: string;
+  number: string;
+  createdAt: string;
+  customerName: string;
+  customerPhone: string;
+  vehicleReg: string;
+  vehicleModel: string;
+  lines: BillLine[];
+  total: number;
+  paymentMethod: string;
+};
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return !!value && typeof value === "object" && !Array.isArray(value);
+}
+
+function asString(value: unknown): string {
+  return typeof value === "string" ? value : "";
+}
+
+function asNumber(value: unknown): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : 0;
+}
+
+export function parseBill(raw: string): BillView | null {
+  let data: unknown;
+  try {
+    data = JSON.parse(raw);
+  } catch {
+    return null;
+  }
+  if (!isRecord(data)) return null;
+  const lines = Array.isArray(data.lines) ? data.lines.filter(isRecord) : [];
+  return {
+    shopName: asString(data.shopName),
+    address: asString(data.address),
+    phone: asString(data.phone),
+    number: asString(data.number),
+    createdAt: asString(data.createdAt),
+    customerName: asString(data.customerName),
+    customerPhone: asString(data.customerPhone),
+    vehicleReg: asString(data.vehicleReg),
+    vehicleModel: asString(data.vehicleModel),
+    lines: lines.map((line) => ({
+      description: asString(line.description),
+      qty: typeof line.qty === "number" || typeof line.qty === "string" ? line.qty : null,
+      unitPrice: asNumber(line.unitPrice),
+      lineTotal: asNumber(line.lineTotal),
+    })),
+    total: asNumber(data.total),
+    paymentMethod: asString(data.paymentMethod),
+  };
+}
+
+export function formatBillDate(iso: string): string {
+  if (!iso) return "";
+  const date = new Date(iso);
+  if (Number.isNaN(date.getTime())) return "";
+  return date.toLocaleString("en-LK", { timeZone: "Asia/Colombo" });
+}