.

mccs-it/thermal/modules/Thermal.js

@@ -1,6 +1,7 @@
 const PDFDocument = require('pdfkit');
+const fs = require('fs');
 const { spawn } = require('child_process');
-
+const path = require('path');
 
 module.exports = {
 	generateFile(username, studentId, req, res) {
@@ -20,41 +21,19 @@ module.exports = {
 			'For further assistance contact ithelp@mainecc.edu'
 		];
 		const infoString = infoArray.join('\n');
-		// Create a new PDF document in-memory
+		
+		// Define the path for the PDF file
+		const pdfFilePath = path.join(__dirname, 'output.pdf');
+		
+		// Create a new PDF document
 		const doc = new PDFDocument({
 			size: [204, 400],
 			margin: 5
 		});
 		
-		// Store the PDF in a buffer
-		let buffers = [];
-		doc.on('data', buffers.push.bind(buffers));
-		doc.on('end', () => {
-			// Combine all the chunks into a single buffer
-			const pdfData = Buffer.concat(buffers);
-			
-			// Set the response headers to serve the PDF file
-			res.writeHead(200, {
-				'Content-Type': 'application/pdf',
-				'Content-Disposition': 'inline; filename="output.pdf"', // Or 'attachment' for download
-				'Content-Length': pdfData.length,
-			});
-			
-			// Send the PDF file as the response
-			res.end(pdfData);
-			
-			// Print the PDF using lp command
-			const printer = spawn('lp', ['-d', 'ITThermal']); // Replace 'printer_name' with your actual printer name
-			
-			// Handle error if the printing process fails
-			printer.on('error', (err) => {
-				console.error('Failed to start printing process:', err);
-			});
-			
-			// Pipe the PDF data to the printer
-			printer.stdin.write(pdfData);
-			printer.stdin.end();
-		});
+		// Create a writable stream to save the PDF to a file
+		const writeStream = fs.createWriteStream(pdfFilePath);
+		doc.pipe(writeStream);
 		
 		// Add content (image, text) to the PDF
 		doc.image('./public/itslogo.jpg', {
@@ -76,8 +55,39 @@ module.exports = {
 		
 		// Finalize the PDF
 		doc.end();
-	},
-	generatePdf() {
 		
+		writeStream.on('finish', () => {
+			// PDF file has been saved, now print it using lp command
+			const printer = spawn('lp', ['-d', 'ITThermal', pdfFilePath]); // Replace 'ITThermal' with your actual printer name
+			
+			// Handle error if the printing process fails
+			printer.on('error', (err) => {
+				console.error('Failed to start printing process:', err);
+				res.status(500).json({ message: 'Failed to start printing process', error: err.message });
+			});
+			
+			// Handle the process exit event
+			printer.on('close', (code) => {
+				if (code === 0) {
+					// Delete the file after printing to clean up
+					fs.unlink(pdfFilePath, (err) => {
+						if (err) {
+							console.error('Error deleting file:', err);
+							res.status(500).json({ message: 'Failed to clean up after printing', error: err.message });
+							return;
+						}
+						res.send('PDF sent to printer successfully.');
+					});
+				} else {
+					res.status(500).json({ message: 'Failed to print PDF' });
+				}
+			});
+		});
+		
+		// Handle any errors during file writing
+		writeStream.on('error', (err) => {
+			console.error('Error writing PDF file:', err);
+			res.status(500).json({ message: 'Error writing PDF file', error: err.message });
+		});
 	}
 }