first commit

app/logic/documents/engine/excel.engine.js

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+/**
+ * Copyright (c) 2026 Niolla
+ * All rights reserved.
+ *
+ * This source code is proprietary and confidential.
+ * Unauthorized copying, modification, distribution, or use
+ * of this file, via any medium, is strictly prohibited.
+ */
+
+// app/logic/documents/engine/excel.engine.js
+
+const ExcelJS = require("exceljs");
+
+const generateExcel = async (builder, data) => {
+  const workbook = new ExcelJS.Workbook();
+  const worksheet = workbook.addWorksheet(builder.sheetName);
+
+  await builder.build(worksheet, data);
+
+  return await workbook.xlsx.writeBuffer();
+};
+
+module.exports = {
+  generateExcel,
+};

app/logic/documents/engine/pdf.engine.js

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+/**
+ * Copyright (c) 2026 Niolla
+ * All rights reserved.
+ *
+ * This source code is proprietary and confidential.
+ * Unauthorized copying, modification, distribution, or use
+ * of this file, via any medium, is strictly prohibited.
+ */
+
+// app/logic/documents/engine/pdf.engine.js
+
+const puppeteer = require("puppeteer");
+
+const generatePDF = async (html) => {
+  const launchConfig = {
+    args: ["--no-sandbox", "--disable-setuid-sandbox"],
+  };
+
+  if (process.env.PUPPETEER_EXECUTABLE_PATH) {
+    launchConfig.executablePath = process.env.PUPPETEER_EXECUTABLE_PATH;
+  } else {
+    launchConfig.headless = true;
+  }
+
+  const browser = await puppeteer.launch(launchConfig);
+
+  try {
+    const page = await browser.newPage();
+
+    await page.setContent(html, {
+      waitUntil: "load",
+    });
+
+    // Wait for fonts
+    await page.evaluate(() => document.fonts?.ready);
+
+    // Wait for images to fully decode
+    await page.evaluate(async () => {
+      const images = Array.from(document.images);
+
+      await Promise.all(
+        images.map((img) => {
+          if (img.complete && img.naturalHeight !== 0) return;
+
+          return new Promise((resolve) => {
+            img.onload = resolve;
+            img.onerror = resolve;
+          });
+        }),
+      );
+    });
+
+    // Force layout + paint
+    await page.evaluate(() => document.body.getBoundingClientRect());
+
+    // Extra stability delay (important on servers)
+    await new Promise((r) => setTimeout(r, 1000));
+
+    const buffer = await page.pdf({
+      format: "A4",
+      printBackground: true,
+    });
+
+    return buffer;
+  } finally {
+    await browser.close();
+  }
+};
+
+module.exports = { generatePDF };