rework for API, folder changes, easter eggs and fun

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

@@ -0,0 +1,44 @@
+package stirling.software.SPDF.controller.api;
+
+import java.io.IOException;
+
+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.ResponseEntity;
+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.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import io.swagger.v3.oas.annotations.Hidden;
+import stirling.software.SPDF.utils.PdfUtils;
+
+@RestController
+public class RotationController {
+
+    private static final Logger logger = LoggerFactory.getLogger(RotationController.class);
+
+    @PostMapping(consumes = "multipart/form-data", value = "/rotate-pdf")
+    public ResponseEntity<byte[]> rotatePDF(@RequestPart(required = true, value = "fileInput") MultipartFile pdfFile, @RequestParam("angle") Integer 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();
+
+        for (PDPage page : pages) {
+            page.setRotation(page.getRotation() + angle);
+        }
+
+        return PdfUtils.pdfDocToWebResponse(document, pdfFile.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_rotated.pdf");
+
+    }
+
+}