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app/logic/documents/index.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/index.js
+
+const registry = require("./registry");
+
+const { generateExcel } = require("./engine/excel.engine");
+const { 
+  generatePdfFromPreCost,
+  generatePdfFromInvoice,
+  generatePdfFromDispatchNote,
+  generatePdfFromDeliveryNote,
+  generatePdfFromPO,
+  generatePdfFromCustomDocument,
+  generatePdfFromCreditNote,
+} = require("../../utils/pdfGenerator");
+
+const formatMeta = {
+  pdf: {
+    ext: "pdf",
+    mime: "application/pdf",
+  },
+
+  excel: {
+    ext: "xlsx",
+    mime:
+      "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+  },
+};
+
+const pdfGenerators = {
+  precost: generatePdfFromPreCost,
+  invoice: generatePdfFromInvoice,
+  dispatchnote: generatePdfFromDispatchNote,
+  deliverynote: generatePdfFromDeliveryNote,
+  po: generatePdfFromPO,
+  customdocument: generatePdfFromCustomDocument,
+  creditnote: generatePdfFromCreditNote,
+};
+
+const generateDocument = async (
+  document,
+  format,
+  data
+) => {
+  document = document.toLowerCase().replace(/[\s_-]+/g, "");
+  format = format.toLowerCase();
+
+  const doc = registry[document];
+
+  if (!doc) {
+    const availableTypes = Object.keys(registry).join(", ");
+    throw new Error(`Unsupported document type: "${document}". Available types: ${availableTypes}`);
+  }
+
+  let fileBuffer;
+
+  if (format === "pdf") {
+    // Format the data using the template
+    const formattedData = await doc.pdfTemplate(data);
+    
+    // Get the correct PDF generator for this document type
+    const pdfGenerator = pdfGenerators[document];
+    
+    if (pdfGenerator) {
+      fileBuffer = await pdfGenerator(formattedData);
+    } else {
+      throw new Error(`No PDF generator found for document type: ${document}`);
+    }
+  }
+
+  else if (format === "excel") {
+    if (doc.excelBuilder) {
+      fileBuffer = await generateExcel(
+        doc.excelBuilder,
+        data
+      );
+    } else {
+      throw new Error(`Excel generation not supported for document type: ${document}`);
+    }
+  }
+
+  else {
+    throw new Error("Unsupported format");
+  }
+
+  const meta = formatMeta[format];
+
+  return {
+    fileBuffer,
+    fileName: `${document}-${Date.now()}.${meta.ext}`,
+    mimeType: meta.mime,
+  };
+};
+
+module.exports = {
+  generateDocument,
+};