Add rotate and compress (#7)

* Add files via upload

* Update build.gradle

* Update general.css

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

@@ -0,0 +1,87 @@
+package stirling.software.SPDF.controller;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+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 com.spire.pdf.PdfCompressionLevel;
+import com.spire.pdf.PdfDocument;
+import com.spire.pdf.PdfPageBase;
+import com.spire.pdf.exporting.PdfImageInfo;
+import com.spire.pdf.graphics.PdfBitmap;
+
+import stirling.software.SPDF.utils.PdfUtils;
+//import com.spire.pdf.*;
+@Controller
+public class CompressController {
+
+	private static final Logger logger = LoggerFactory.getLogger(CompressController.class);
+
+	@GetMapping("/compress-pdf")
+	public String compressPdfForm(Model model) {
+		model.addAttribute("currentPage", "compress-pdf");
+		return "compress-pdf";
+	}
+
+	@PostMapping("/compress-pdf")
+	public ResponseEntity<byte[]> compressPDF(@RequestParam("fileInput") MultipartFile pdfFile,
+			@RequestParam("imageCompressionLevel") String imageCompressionLevel) throws IOException {
+		
+
+		//Load a sample PDF document
+        PdfDocument document = new PdfDocument();
+        document.loadFromBytes(pdfFile.getBytes());
+        
+        //Compress PDF
+        document.getFileInfo().setIncrementalUpdate(false);
+        document.setCompressionLevel(PdfCompressionLevel.Best);
+        
+        //compress PDF Images
+        for (int i = 0; i < document.getPages().getCount(); i++) {
+
+            PdfPageBase page = document.getPages().get(i);
+            PdfImageInfo[] images = page.getImagesInfo();
+            if (images != null && images.length > 0)
+                for (int j = 0; j < images.length; j++) {
+                    PdfImageInfo image = images[j];
+                    PdfBitmap bp = new PdfBitmap(image.getImage());
+                    //bp.setPngDirectToJpeg(true);
+                    bp.setQuality(Integer.valueOf(imageCompressionLevel));
+
+                    page.replaceImage(j, bp);
+
+                }
+        }
+        
+     // Save the rearranged PDF to a ByteArrayOutputStream
+	ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+	document.saveToStream(outputStream);
+
+	// Close the original document
+	document.close();
+
+	// Prepare the response headers
+	HttpHeaders headers = new HttpHeaders();
+	headers.setContentType(MediaType.APPLICATION_PDF);
+	headers.setContentDispositionFormData("attachment", "compressed.pdf");
+	headers.setContentLength(outputStream.size());
+
+	// Return the response with the PDF data and headers
+	return new ResponseEntity<>(outputStream.toByteArray(), headers, HttpStatus.OK);
+	}
+
+}