Add rotate and compress (#7)

* Add files via upload

* Update build.gradle

* Update general.css

src/main/java/stirling/software/SPDF/controller/RotationController.java

@@ -0,0 +1,74 @@
+package stirling.software.SPDF.controller;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.ListIterator;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageTree;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.utils.PdfUtils;
+
+@Controller
+public class RotationController {
+
+	private static final Logger logger = LoggerFactory.getLogger(RotationController.class);
+
+	@GetMapping("/rotate-pdf")
+	public String rotatePdfForm(Model model) {
+		model.addAttribute("currentPage", "rotate-pdf");
+		return "rotate-pdf";
+	}
+
+	@PostMapping("/rotate-pdf")
+	public ResponseEntity<byte[]> rotatePDF(@RequestParam("fileInput") MultipartFile pdfFile,
+			@RequestParam("angle") String angle) throws IOException {
+
+		// Load the PDF document
+		PDDocument document = PDDocument.load(pdfFile.getBytes());
+
+		// Get the list of pages in the document
+		PDPageTree pages = document.getPages();
+
+		// Rotate all pages by the specified angle
+		Iterator<PDPage> iterPage = pages.iterator();
+
+		while (iterPage.hasNext()) {
+			PDPage page = iterPage.next();
+			page.setRotation(Integer.valueOf(angle));
+		}
+
+		// Save the rearranged PDF to a ByteArrayOutputStream
+		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+		document.save(outputStream);
+
+		// Close the document
+		document.close();
+
+		// Prepare the response headers
+		HttpHeaders headers = new HttpHeaders();
+		headers.setContentType(MediaType.APPLICATION_PDF);
+		headers.setContentDispositionFormData("attachment", "output.pdf");
+		headers.setContentLength(outputStream.size());
+
+		// Return the response with the PDF data and headers
+		return new ResponseEntity<>(outputStream.toByteArray(), headers, HttpStatus.OK);
+
+	}
+
+}