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feat: sign document with text

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This commit is contained in:
Ephraim Atta-Duncan
2023-12-11 12:03:22 +00:00
parent e4b7747f66
commit 6ad3edb6c8
10 changed files with 112 additions and 21 deletions
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12
packages/lib/server-only/pdf/insert-field-in-pdf.ts
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@ -46,8 +46,12 @@ export const insertFieldInPDF = async (pdf: PDFDocument, field: FieldWithSignatu
await pdf.embedFont(fontCaveat);
}
const CUSTOM_TEXT = field.customText || field.Signature?.typedSignature || '';
const isInsertingImage =
isSignatureField && typeof field.Signature?.signatureImageAsBase64 === 'string';
isSignatureField &&
typeof field.Signature?.signatureImageAsBase64 === 'string' &&
field.Signature?.signatureImageAsBase64.startsWith('data:image/png;base64,');
if (isSignatureField && isInsertingImage) {
const image = await pdf.embedPng(field.Signature?.signatureImageAsBase64 ?? '');
@ -73,13 +77,13 @@ export const insertFieldInPDF = async (pdf: PDFDocument, field: FieldWithSignatu
height: imageHeight,
});
} else {
let textWidth = font.widthOfTextAtSize(field.customText, fontSize);
let textWidth = font.widthOfTextAtSize(CUSTOM_TEXT, fontSize);
const textHeight = font.heightAtSize(fontSize);
const scalingFactor = Math.min(fieldWidth / textWidth, fieldHeight / textHeight, 1);
fontSize = Math.max(Math.min(fontSize * scalingFactor, maxFontSize), minFontSize);
textWidth = font.widthOfTextAtSize(field.customText, fontSize);
textWidth = font.widthOfTextAtSize(CUSTOM_TEXT, fontSize);
const textX = fieldX + (fieldWidth - textWidth) / 2;
let textY = fieldY + (fieldHeight - textHeight) / 2;
@ -87,7 +91,7 @@ export const insertFieldInPDF = async (pdf: PDFDocument, field: FieldWithSignatu
// Invert the Y axis since PDFs use a bottom-left coordinate system
textY = pageHeight - textY - textHeight;
page.drawText(field.customText, {
page.drawText(CUSTOM_TEXT, {
x: textX,
y: textY,
size: fontSize,