auto rename

src/main/java/stirling/software/SPDF/controller/api/other/AutoRenameController.java

@@ -0,0 +1,164 @@
+package stirling.software.SPDF.controller.api.other;
+
+import java.io.IOException;
+import java.util.Comparator;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+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.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import stirling.software.SPDF.utils.GeneralUtils;
+import stirling.software.SPDF.utils.PdfUtils;
+import stirling.software.SPDF.utils.WebResponseUtils;
+import org.apache.pdfbox.pdmodel.*;
+import org.apache.pdfbox.pdmodel.common.*;
+import org.apache.pdfbox.pdmodel.PDPageContentStream.*;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.http.*;
+import org.springframework.web.multipart.MultipartFile;
+import io.swagger.v3.oas.annotations.*;
+import io.swagger.v3.oas.annotations.media.*;
+import io.swagger.v3.oas.annotations.parameters.*;
+import org.apache.pdfbox.pdmodel.font.PDType1Font;
+import org.apache.pdfbox.text.TextPosition;
+import org.apache.tomcat.util.http.ResponseUtil;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.net.URLEncoder;
+import java.util.List;
+import java.util.ArrayList;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.itextpdf.io.font.constants.StandardFonts;
+import com.itextpdf.kernel.font.PdfFont;
+import com.itextpdf.kernel.font.PdfFontFactory;
+import com.itextpdf.kernel.geom.Rectangle;
+import com.itextpdf.kernel.pdf.PdfReader;
+import com.itextpdf.kernel.pdf.PdfWriter;
+import com.itextpdf.kernel.pdf.PdfDocument;
+import com.itextpdf.kernel.pdf.PdfPage;
+import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
+import com.itextpdf.layout.Canvas;
+import com.itextpdf.layout.element.Paragraph;
+import com.itextpdf.layout.properties.TextAlignment;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.io.*;
+import org.apache.pdfbox.pdmodel.*;
+import org.apache.pdfbox.text.*;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+import io.swagger.v3.oas.annotations.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+import org.springframework.http.ResponseEntity;
+@RestController
+@Tag(name = "Other", description = "Other APIs")
+public class AutoRenameController {
+
+    private static final Logger logger = LoggerFactory.getLogger(AutoRenameController.class);
+
+    private static final float TITLE_FONT_SIZE_THRESHOLD = 20.0f;
+    private static final int LINE_LIMIT = 7;
+
+    @PostMapping(consumes = "multipart/form-data", value = "/auto-rename")
+    @Operation(summary = "Extract header from PDF file", description = "This endpoint accepts a PDF file and attempts to extract its title or header based on heuristics. Input:PDF Output:PDF Type:SISO")
+    public ResponseEntity<byte[]> extractHeader(
+    	            @RequestPart(value = "fileInput") @Parameter(description = "The input PDF file from which the header is to be extracted.", required = true) MultipartFile file,
+    	            @RequestParam(required = false, defaultValue = "false") @Parameter(description = "Flag indicating whether to use the first text as a fallback if no suitable title is found. Defaults to false.", required = false) Boolean useFirstTextAsFallback)
+    	            throws Exception {
+
+    	        PDDocument document = PDDocument.load(file.getInputStream());
+    	        PDFTextStripper reader = new PDFTextStripper() {
+    	            class LineInfo {
+    	                String text;
+    	                float fontSize;
+
+    	                LineInfo(String text, float fontSize) {
+    	                    this.text = text;
+    	                    this.fontSize = fontSize;
+    	                }
+    	            }
+
+    	            List<LineInfo> lineInfos = new ArrayList<>();
+    	            StringBuilder lineBuilder = new StringBuilder();
+    	            float lastY = -1;
+    	            float maxFontSizeInLine = 0.0f;
+    	            int lineCount = 0;
+
+    	            @Override
+    	            protected void processTextPosition(TextPosition text) {
+    	                if (lastY != text.getY() && lineCount < LINE_LIMIT) {
+    	                    processLine();
+    	                    lineBuilder = new StringBuilder(text.getUnicode());
+    	                    maxFontSizeInLine = text.getFontSizeInPt();
+    	                    lastY = text.getY();
+    	                    lineCount++;
+    	                } else if (lineCount < LINE_LIMIT) {
+    	                    lineBuilder.append(text.getUnicode());
+    	                    if (text.getFontSizeInPt() > maxFontSizeInLine) {
+    	                        maxFontSizeInLine = text.getFontSizeInPt();
+    	                    }
+    	                }
+    	            }
+
+    	            private void processLine() {
+    	                if (lineBuilder.length() > 0 && lineCount < LINE_LIMIT) {
+    	                    lineInfos.add(new LineInfo(lineBuilder.toString(), maxFontSizeInLine));
+    	                }
+    	            }
+
+    	            @Override
+    	            public String getText(PDDocument doc) throws IOException {
+    	                this.lineInfos.clear();
+    	                this.lineBuilder = new StringBuilder();
+    	                this.lastY = -1;
+    	                this.maxFontSizeInLine = 0.0f;
+    	                this.lineCount = 0;
+    	                super.getText(doc);
+    	                processLine(); // Process the last line
+
+    	                // Sort lines by font size in descending order and get the first one
+    	                lineInfos.sort(Comparator.comparing((LineInfo li) -> li.fontSize).reversed());
+    	                String title = lineInfos.isEmpty() ? null : lineInfos.get(0).text;
+
+    	                return title != null ? title : (useFirstTextAsFallback ? (lineInfos.isEmpty() ? null : lineInfos.get(lineInfos.size() - 1).text) : null);
+    	            }
+    	        };
+
+    	        String header = reader.getText(document);
+
+
+        
+        // Sanitize the header string by removing characters not allowed in a filename.
+        if (header != null && header.length() < 255) {
+            header = header.replaceAll("[/\\\\?%*:|\"<>]", "");
+            return WebResponseUtils.pdfDocToWebResponse(document, header + ".pdf");
+        } else {
+        	logger.info("File has no good title to be found");
+        	return WebResponseUtils.pdfDocToWebResponse(document, file.getOriginalFilename());
+        }
+    }
+    
+
+
+
+}

src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java

@@ -140,4 +140,11 @@ public class OtherWebController {
         return "other/auto-crop";
     }
     
+    @GetMapping("/auto-rename")
+    @Hidden
+    public String autoRenameForm(Model model) {
+        model.addAttribute("currentPage", "auto-rename");
+        return "other/auto-rename";
+    }
+    
 }

src/main/resources/messages_en_GB.properties

@@ -138,6 +138,10 @@ home.pipeline.desc=Run multiple actions on PDFs by defining pipeline scripts
 home.add-page-numbers.title=Add Page Numbers
 home.add-page-numbers.desc=Add Page numbers throughout a document in a set location
 
+home.auto-rename.title=Auto Rename PDF File
+home.auto-rename.desc=Auto renames a PDF file based on its detected header 
+
+
 error.pdfPassword=The PDF Document is passworded and either the password was not provided or was incorrect
 
 downloadPdf=Download PDF

src/main/resources/static/images/fonts.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-fonts" viewBox="0 0 16 16">
+  <path d="M12.258 3h-8.51l-.083 2.46h.479c.26-1.544.758-1.783 2.693-1.845l.424-.013v7.827c0 .663-.144.82-1.3.923v.52h4.082v-.52c-1.162-.103-1.306-.26-1.306-.923V3.602l.431.013c1.934.062 2.434.301 2.693 1.846h.479L12.258 3z"/>
+</svg>

src/main/resources/templates/fragments/navbar.html

@@ -116,7 +116,8 @@
                             <div th:replace="~{fragments/navbarEntry :: navbarEntry ('repair', 'images/wrench.svg', 'home.repair.title', 'home.repair.desc')}"></div>
                             <div th:replace="~{fragments/navbarEntry :: navbarEntry ('remove-blanks', 'images/blank-file.svg', 'home.removeBlanks.title', 'home.removeBlanks.desc')}"></div>
                             <div th:replace="~{fragments/navbarEntry :: navbarEntry ('compare', 'images/scales.svg', 'home.compare.title', 'home.compare.desc')}"></div>
-                            <div th:replace="~{fragments/navbarEntry :: navbarEntry ('compare', 'images/add-page-numbers.svg', 'home.add-page-numbers.title', 'home.add-page-numbers.desc')}"></div>
+                            <div th:replace="~{fragments/navbarEntry :: navbarEntry ('add-page-numbers', 'images/add-page-numbers.svg', 'home.add-page-numbers.title', 'home.add-page-numbers.desc')}"></div>
+                            <div th:replace="~{fragments/navbarEntry :: navbarEntry ('auto-rename', 'images/fonts.svg', 'home.auto-rename.title', 'home.auto-rename.desc')}"></div>
                         </div>
                     </li>
 

src/main/resources/templates/home.html

@@ -69,7 +69,7 @@
                 <div th:replace="~{fragments/card :: card(id='scale-pages', cardTitle=#{home.scalePages.title}, cardText=#{home.scalePages.desc}, cardLink='scale-pages', svgPath='images/scale-pages.svg')}"></div>
                 
                 <div th:replace="~{fragments/card :: card(id='add-page-numbers', cardTitle=#{home.add-page-numbers.title}, cardText=#{home.add-page-numbers.desc}, cardLink='add-page-numbers', svgPath='images/add-page-numbers.svg')}"></div>
-                
+                <div th:replace="~{fragments/card :: card(id='auto-rename', cardTitle=#{home.auto-rename.title}, cardText=#{home.auto-rename.desc}, cardLink='auto-rename', svgPath='images/fonts.svg')}"></div>
                 
 
                 

src/main/resources/templates/other/auto-rename.html

@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html th:lang="${#locale.toString()}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
+
+<th:block th:insert="~{fragments/common :: head(title=#{auto-rename.title})}"></th:block>
+
+
+<body>
+    <th:block th:insert="~{fragments/common :: game}"></th:block>
+    <div id="page-container">
+        <div id="content-wrap">
+            <div th:insert="~{fragments/navbar.html :: navbar}"></div>
+            <br> <br>
+            <div class="container">
+                <div class="row justify-content-center">
+                    <div class="col-md-6">
+                        <h2 th:text="#{auto-rename.header}"></h2>
+                        <form method="post" enctype="multipart/form-data" th:action="@{auto-rename}">
+                            <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}"></div>
+                            <br>
+                            <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{auto-rename.submit}"></button>
+                        </form>
+                        <p class="mt-3" th:text="#{auto-rename.credit}"></p>
+                    </div>
+                </div>
+            </div>
+
+        </div>
+        <div th:insert="~{fragments/footer.html :: footer}"></div>
+    </div>
+</body>
+</html>