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Merge branch 'main' into feat/auto-placing-fields

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Catalin Pit
2025-10-29 14:29:04 +02:00
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parent cb9bf407f7 9350c53c7d
commit 1780a5c262
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packages/lib/server-only/pdf/insert-field-in-pdf-v2.ts
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@ -1,133 +1,64 @@
import type { PDFDocument } from '@cantoo/pdf-lib';
import { RotationTypes, radiansToDegrees } from '@cantoo/pdf-lib';
import fontkit from '@pdf-lib/fontkit';
import Konva from 'konva';
import 'konva/skia-backend';
import fs from 'node:fs';
import path from 'node:path';
import type { Canvas } from 'skia-canvas';
import { match } from 'ts-pattern';
import { FontLibrary } from 'skia-canvas';
import { isSignatureFieldType } from '@documenso/prisma/guards/is-signature-field';
import type { FieldWithSignature } from '@documenso/prisma/types/field-with-signature';
import { NEXT_PUBLIC_WEBAPP_URL } from '../../constants/app';
import { renderField } from '../../universal/field-renderer/render-field';
import { getPageSize } from './get-page-size';
// const font = await pdf.embedFont(
// isSignatureField ? fontCaveat : fontNoto,
// isSignatureField ? { features: { calt: false } } : undefined,
// );
// const minFontSize = isSignatureField ? MIN_HANDWRITING_FONT_SIZE : MIN_STANDARD_FONT_SIZE;
// const maxFontSize = isSignatureField ? DEFAULT_HANDWRITING_FONT_SIZE : DEFAULT_STANDARD_FONT_SIZE;
type InsertFieldInPDFV2Options = {
pageWidth: number;
pageHeight: number;
fields: FieldWithSignature[];
};
export const insertFieldInPDFV2 = async (pdf: PDFDocument, field: FieldWithSignature) => {
const [fontCaveat, fontNoto] = await Promise.all([
fetch(`${NEXT_PUBLIC_WEBAPP_URL()}/fonts/caveat.ttf`).then(async (res) => res.arrayBuffer()),
fetch(`${NEXT_PUBLIC_WEBAPP_URL()}/fonts/noto-sans.ttf`).then(async (res) => res.arrayBuffer()),
export const insertFieldInPDFV2 = async ({
pageWidth,
pageHeight,
fields,
}: InsertFieldInPDFV2Options) => {
const fontPath = path.join(process.cwd(), 'public/fonts');
FontLibrary.use([
path.join(fontPath, 'caveat.ttf'),
path.join(fontPath, 'noto-sans.ttf'),
path.join(fontPath, 'noto-sans-japanese.ttf'),
path.join(fontPath, 'noto-sans-chinese.ttf'),
path.join(fontPath, 'noto-sans-korean.ttf'),
]);
const isSignatureField = isSignatureFieldType(field.type);
pdf.registerFontkit(fontkit);
const pages = pdf.getPages();
const page = pages.at(field.page - 1);
if (!page) {
throw new Error(`Page ${field.page} does not exist`);
}
const pageRotation = page.getRotation();
let pageRotationInDegrees = match(pageRotation.type)
.with(RotationTypes.Degrees, () => pageRotation.angle)
.with(RotationTypes.Radians, () => radiansToDegrees(pageRotation.angle))
.exhaustive();
// Round to the closest multiple of 90 degrees.
pageRotationInDegrees = Math.round(pageRotationInDegrees / 90) * 90;
const isPageRotatedToLandscape = pageRotationInDegrees === 90 || pageRotationInDegrees === 270;
// Todo: Evenloeps - getPageSize this had extra logic? Ask lucas
console.log({
cropBox: page.getCropBox(),
mediaBox: page.getMediaBox(),
mediaBox2: page.getSize(),
});
const { width: pageWidth, height: pageHeight } = getPageSize(page);
// PDFs can have pages that are rotated, which are correctly rendered in the frontend.
// However when we load the PDF in the backend, the rotation is applied.
//
// To account for this, we swap the width and height for pages that are rotated by 90/270
// degrees. This is so we can calculate the virtual position the field was placed if it
// was correctly oriented in the frontend.
//
// Then when we insert the fields, we apply a transformation to the position of the field
// so it is rotated correctly.
if (isPageRotatedToLandscape) {
// [pageWidth, pageHeight] = [pageHeight, pageWidth];
}
console.log({
pageWidth,
pageHeight,
fieldWidth: field.width,
fieldHeight: field.height,
});
const stage = new Konva.Stage({ width: pageWidth, height: pageHeight });
const layer = new Konva.Layer();
// Will render onto the layer.
renderField({
field: {
renderId: field.id.toString(),
...field,
width: Number(field.width),
height: Number(field.height),
positionX: Number(field.positionX),
positionY: Number(field.positionY),
},
pageLayer: layer,
pageWidth,
pageHeight,
mode: 'export',
});
const insertedFields = fields.filter((field) => field.inserted);
// Render the fields onto the layer.
for (const field of insertedFields) {
renderField({
scale: 1,
field: {
renderId: field.id.toString(),
...field,
width: Number(field.width),
height: Number(field.height),
positionX: Number(field.positionX),
positionY: Number(field.positionY),
},
translations: null,
pageLayer: layer,
pageWidth,
pageHeight,
mode: 'export',
});
}
stage.add(layer);
// eslint-disable-next-line @typescript-eslint/consistent-type-assertions
const canvas = layer.canvas._canvas as unknown as Canvas;
const renderedField = await canvas.toBuffer('svg');
fs.writeFileSync(
`rendered-field-${field.envelopeId}--${field.id}.svg`,
renderedField.toString('utf-8'),
);
// Embed the SVG into the PDF
const svgElement = await pdf.embedSvg(renderedField.toString('utf-8'));
// Calculate position to cover the whole page
// pdf-lib coordinates: (0,0) is bottom-left, y increases upward
const svgWidth = pageWidth; // Use full page width
const svgHeight = pageHeight; // Use full page height
const x = 0; // Start from left edge
const y = pageHeight; // Start from bottom edge
// Draw the SVG on the page
page.drawSvg(svgElement, {
x: x,
y: y,
width: svgWidth,
height: svgHeight,
});
return pdf;
return await canvas.toBuffer('pdf');
};