xavierk
f6c81a7e7f
Rendering moves into a module Web Worker behind a latest-wins RenderClient with a watchdog and a handshake-based main-thread fallback. The preview shows the real PDF through pdf.js at 2x with zoom, page indicator, audit issues popover and a focus modal. A4/Letter and margin controls are frozen into each invoice at issue and can be saved as the default (migration M3). react-pdf and pdf.js are lazy-loaded; the main chunk shrinks from 1.8 MB to 0.5 MB. The HTML twin and its styles are removed.
99 lines
3.4 KiB
TypeScript
99 lines
3.4 KiB
TypeScript
import type { BankAccount, Invoice, InvoiceItem, Settings, TaxType } from "./types";
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import { computeLineAmount, computeTotals } from "./invoice";
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import { amountInWords } from "./numberToWords";
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/** The form fields the preview reads. */
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export interface PreviewForm {
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invoiceDate: string;
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dueDate: string;
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clientId: number | null;
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clientName: string;
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clientAddress: string;
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clientGstin: string;
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poNumber: string;
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placeOfSupply: string;
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discount: number;
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taxRate: number;
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reverseCharge: boolean;
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signaturePath: string | null;
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notes: string;
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items: InvoiceItem[];
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}
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/**
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* The tax treatment Rust derives from the supplier state and the place of supply
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* (src-tauri/src/gst.rs); the form shows and sends the same value.
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*/
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export function deriveTaxType(settings: Settings, placeOfSupply: string): TaxType {
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if (settings.gstRegistration === "unregistered") return "none";
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return !placeOfSupply || placeOfSupply === settings.vendorStateCode ? "cgst_sgst" : "igst";
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}
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/** Mirrors vendor_snapshot() in src-tauri/src/commands/invoice.rs. */
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export function vendorSnapshotJson(settings: Settings): string {
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return JSON.stringify({
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vendorName: settings.vendorName,
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vendorAddress: settings.vendorAddress,
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vendorEmail: settings.vendorEmail,
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vendorPhone: settings.vendorPhone,
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vendorPan: settings.vendorPan,
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vendorGstin: settings.gstRegistration === "unregistered" ? "" : settings.vendorGstin.trim(),
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vendorStateCode: settings.vendorStateCode,
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logoPath: settings.logoPath,
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signaturePath: settings.signaturePath,
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gstRegistration: settings.gstRegistration,
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signatoryName: settings.signatoryName,
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signatoryDesignation: settings.signatoryDesignation,
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});
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}
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/**
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* A draft-status Invoice built from the live form, so the real renderer can draw it before anything
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* is issued. Totals use the same paise rounding Rust stores. `number` is the next number (a peek),
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* not yet consumed.
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*/
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export function formToPreviewInvoice(form: PreviewForm, number: string, settings: Settings, bank: BankAccount | null): Invoice {
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const taxType = deriveTaxType(settings, form.placeOfSupply);
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const registered = settings.gstRegistration !== "unregistered";
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const totals = computeTotals(form.items, form.discount, taxType, form.taxRate);
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const items = form.items.map((item, i) => ({ ...item, amount: computeLineAmount(item), sortOrder: i }));
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return {
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id: 0,
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number,
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seriesId: null,
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invoiceDate: form.invoiceDate,
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dueDate: form.dueDate,
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clientId: form.clientId,
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clientName: form.clientName,
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clientAddress: form.clientAddress,
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clientGstin: form.clientGstin,
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poNumber: form.poNumber,
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placeOfSupplyStateCode: form.placeOfSupply,
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subtotal: totals.subtotal,
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discount: totals.discount,
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taxType,
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taxRate: form.taxRate,
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cgstAmount: totals.cgst,
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sgstAmount: totals.sgst,
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igstAmount: totals.igst,
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total: totals.total,
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amountInWords: amountInWords(totals.total),
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bankAccountId: bank?.id ?? null,
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bankSnapshot: bank ? JSON.stringify(bank) : "",
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signaturePath: form.signaturePath,
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notes: form.notes,
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status: "draft",
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createdAt: "",
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updatedAt: "",
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docType: registered ? "tax_invoice" : "invoice",
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reverseCharge: registered && form.reverseCharge,
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vendorSnapshot: vendorSnapshotJson(settings),
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snapshotOrigin: "issued",
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cancelledAt: null,
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cancelReason: "",
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archivedPdfSha256: null,
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renderPrefs: "",
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items,
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};
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}
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