Number fxes

build.gradle

@@ -12,7 +12,8 @@ plugins {
 import com.github.jk1.license.render.*
 
 group = 'stirling.software'
-version = '0.22.1'
+
+version = '0.22.2'
 sourceCompatibility = '17'
 
 repositories {
@@ -158,6 +159,8 @@ dependencies {
     // https://mvnrepository.com/artifact/com.github.vladimir-bukhtoyarov/bucket4j-core
     implementation 'com.github.vladimir-bukhtoyarov:bucket4j-core:7.6.0'
 
+	implementation 'com.fathzer:javaluator:3.0.3'
+
     developmentOnly("org.springframework.boot:spring-boot-devtools:3.2.2")
     compileOnly 'org.projectlombok:lombok:1.18.30'
     annotationProcessor 'org.projectlombok:lombok:1.18.28'

scripts/download-security-jar.sh

@@ -14,8 +14,8 @@ if [ "$DOCKER_ENABLE_SECURITY" = "true" ] && [ "$VERSION_TAG" != "alpha" ]; then
         if [ $? -eq 0 ]; then  # checks if curl was successful
             rm -f app.jar
             ln -s app-security.jar app.jar
-            chown stirlingpdfuser:stirlingpdfgroup app.jar
-            chmod 755 app.jar
+            chown stirlingpdfuser:stirlingpdfgroup app.jar || true
+            chmod 755 app.jar || true
         fi
     fi
 fi

scripts/init-without-ocr.sh

@@ -2,17 +2,17 @@
 
 # Update the user and group IDs as per environment variables
 if [ ! -z "$PUID" ] && [ "$PUID" != "$(id -u stirlingpdfuser)" ]; then
-    usermod -o -u "$PUID" stirlingpdfuser
+    usermod -o -u "$PUID" stirlingpdfuser || true
 fi
 
 if [ ! -z "$PGID" ] && [ "$PGID" != "$(getent group stirlingpdfgroup | cut -d: -f3)" ]; then
-    groupmod -o -g "$PGID" stirlingpdfgroup
+    groupmod -o -g "$PGID" stirlingpdfgroup || true
 fi
-umask "$UMASK"
+umask "$UMASK" || true
 
 echo "Setting permissions and ownership for necessary directories..."
-chown -R stirlingpdfuser:stirlingpdfgroup $HOME /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar
-chmod -R 755 /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar
+chown -R stirlingpdfuser:stirlingpdfgroup $HOME /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar || true
+chmod -R 755 /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar || true
 if [[ "$INSTALL_BOOK_AND_ADVANCED_HTML_OPS" == "true" ]]; then
   apk add --no-cache calibre@testing
 fi

scripts/init.sh

@@ -15,18 +15,18 @@ fi
 
 # Update the user and group IDs as per environment variables
 if [ ! -z "$PUID" ] && [ "$PUID" != "$(id -u stirlingpdfuser)" ]; then
-    usermod -o -u "$PUID" stirlingpdfuser
+    usermod -o -u "$PUID" stirlingpdfuser || true
 fi
 
 
 if [ ! -z "$PGID" ] && [ "$PGID" != "$(getent group stirlingpdfgroup | cut -d: -f3)" ]; then
-    groupmod -o -g "$PGID" stirlingpdfgroup
+    groupmod -o -g "$PGID" stirlingpdfgroup || true
 fi
-umask "$UMASK"
+umask "$UMASK" || true
 
 echo "Setting permissions and ownership for necessary directories..."
-chown -R stirlingpdfuser:stirlingpdfgroup $HOME /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar
-chmod -R 755 /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar
+chown -R stirlingpdfuser:stirlingpdfgroup $HOME /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar || true
+chmod -R 755 /logs /scripts /usr/share/fonts/opentype/noto /usr/share/tessdata /configs /customFiles /pipeline /app.jar || true
 
 
 

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

@@ -51,7 +51,7 @@ public ResponseEntity<byte[]> deletePages(@ModelAttribute PDFWithPageNums reques
         String[] pageOrderArr = pagesToDelete.split(",");
 
         List<Integer> pagesToRemove =
-                GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages(), true);
+                GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages(), false);
 
         Collections.sort(pagesToRemove);
 
@@ -195,7 +195,7 @@ public ResponseEntity<byte[]> rearrangePages(@ModelAttribute RearrangePagesReque
             if (sortType != null && sortType.length() > 0) {
                 newPageOrder = processSortTypes(sortType, totalPages);
             } else {
-                newPageOrder = GeneralUtils.parsePageList(pageOrderArr, totalPages, true);
+                newPageOrder = GeneralUtils.parsePageList(pageOrderArr, totalPages, false);
             }
             logger.info("newPageOrder = " + newPageOrder);
             logger.info("totalPages = " + totalPages);

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

@@ -49,12 +49,14 @@ public ResponseEntity<byte[]> splitPdf(@ModelAttribute PDFWithPageNums request)
         // open the pdf document
 
         PDDocument document = Loader.loadPDF(file.getBytes());
-
-        List<Integer> pageNumbers = request.getPageNumbersList(document, true);
-        if (!pageNumbers.contains(document.getNumberOfPages() - 1)) {
+        int totalPages = document.getNumberOfPages();
+        List<Integer> pageNumbers = request.getPageNumbersList(document, false);
+        System.out.println(
+                pageNumbers.stream().map(String::valueOf).collect(Collectors.joining(",")));
+        if (!pageNumbers.contains(totalPages - 1)) {
             // Create a mutable ArrayList so we can add to it
             pageNumbers = new ArrayList<>(pageNumbers);
-            pageNumbers.add(document.getNumberOfPages() - 1);
+            pageNumbers.add(totalPages - 1);
         }
 
         logger.info(
@@ -69,7 +71,7 @@ public ResponseEntity<byte[]> splitPdf(@ModelAttribute PDFWithPageNums request)
                 for (int i = previousPageNumber; i <= splitPoint; i++) {
                     PDPage page = document.getPage(i);
                     splitDocument.addPage(page);
-                    logger.debug("Adding page {} to split document", i);
+                    logger.info("Adding page {} to split document", i);
                 }
                 previousPageNumber = splitPoint + 1;
 

src/main/java/stirling/software/SPDF/controller/api/misc/StampController.java

@@ -88,7 +88,7 @@ public ResponseEntity<byte[]> addStamp(@ModelAttribute AddStampRequest request)
         // Load the input PDF
         PDDocument document = Loader.loadPDF(pdfFile.getBytes());
 
-        List<Integer> pageNumbers = request.getPageNumbersList(document, false);
+        List<Integer> pageNumbers = request.getPageNumbersList(document, true);
 
         for (int pageIndex : pageNumbers) {
             int zeroBasedIndex = pageIndex - 1;

src/main/java/stirling/software/SPDF/model/api/PDFWithPageNums.java

@@ -33,13 +33,13 @@ public List<Integer> getPageNumbersList(boolean zeroCount) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
-        return GeneralUtils.parsePageString(pageNumbers, pageCount, zeroCount);
+        return GeneralUtils.parsePageList(pageNumbers, pageCount, zeroCount);
     }
 
     @Hidden
     public List<Integer> getPageNumbersList(PDDocument doc, boolean zeroCount) {
         int pageCount = 0;
         pageCount = doc.getNumberOfPages();
-        return GeneralUtils.parsePageString(pageNumbers, pageCount, zeroCount);
+        return GeneralUtils.parsePageList(pageNumbers, pageCount, zeroCount);
     }
 }

src/main/java/stirling/software/SPDF/utils/GeneralUtils.java

@@ -12,11 +12,12 @@
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 import org.springframework.web.multipart.MultipartFile;
 
+import com.fathzer.soft.javaluator.DoubleEvaluator;
+
 import io.github.pixee.security.HostValidator;
 import io.github.pixee.security.Urls;
 
@@ -115,91 +116,114 @@ public static Long convertSizeToBytes(String sizeStr) {
         return null;
     }
 
-    public static List<Integer> parsePageString(String pageOrder, int totalPages) {
-        return parsePageString(pageOrder, totalPages, false);
-    }
-
-    public static List<Integer> parsePageString(
-            String pageOrder, int totalPages, boolean isOneBased) {
-        if (pageOrder == null || pageOrder.isEmpty()) {
-            return Collections.singletonList(1);
+    public static List<Integer> parsePageList(String pages, int totalPages, boolean oneBased) {
+        if (pages == null) {
+            return List.of(1); // Default to first page if input is null
         }
-        if (pageOrder.matches("\\d+")) {
-            // Convert the single number string to an integer and return it in a list
-            return Collections.singletonList(Integer.parseInt(pageOrder));
+        try {
+            return parsePageList(pages.split(","), totalPages, oneBased);
+        } catch (NumberFormatException e) {
+            return List.of(1); // Default to first page if input is invalid
         }
-        return parsePageList(pageOrder.split(","), totalPages, isOneBased);
     }
 
-    public static List<Integer> parsePageList(String[] pageOrderArr, int totalPages) {
-        return parsePageList(pageOrderArr, totalPages, false);
+    public static List<Integer> parsePageList(String[] pages, int totalPages) {
+        return parsePageList(pages, totalPages, false);
     }
 
-    public static List<Integer> parsePageList(
-            String[] pageOrderArr, int totalPages, boolean isOneBased) {
-        List<Integer> newPageOrder = new ArrayList<>();
-
-        int adjustmentFactor = isOneBased ? 1 : 0;
-
-        // loop through the page order array
-        for (String element : pageOrderArr) {
-            if ("all".equalsIgnoreCase(element)) {
+    public static List<Integer> parsePageList(String[] pages, int totalPages, boolean oneBased) {
+        List<Integer> result = new ArrayList<>();
+        int offset = oneBased ? 1 : 0;
+        for (String page : pages) {
+            if ("all".equalsIgnoreCase(page)) {
                 for (int i = 0; i < totalPages; i++) {
-                    newPageOrder.add(i + adjustmentFactor);
+                    result.add(i + offset);
                 }
-                // As all pages are already added, no need to check further
-                break;
-            } else if (element.matches("\\d*n\\+?-?\\d*|\\d*\\+?n")) {
-                // Handle page order as a function
-                int coefficient = 0;
-                int constant = 0;
-                boolean coefficientExists = false;
-                boolean constantExists = false;
-
-                if (element.contains("n")) {
-                    String[] parts = element.split("n");
-                    if (!"".equals(parts[0]) && parts[0] != null) {
-                        coefficient = Integer.parseInt(parts[0]);
-                        coefficientExists = true;
-                    }
-                    if (parts.length > 1 && !"".equals(parts[1]) && parts[1] != null) {
-                        constant = Integer.parseInt(parts[1]);
-                        constantExists = true;
-                    }
-                } else if (element.contains("+")) {
-                    constant = Integer.parseInt(element.replace("+", ""));
-                    constantExists = true;
+            } else if (page.contains(",")) {
+                // Split the string into parts, could be single pages or ranges
+                String[] parts = page.split(",");
+                for (String part : parts) {
+                    result.addAll(handlePart(part, totalPages, offset));
                 }
+            } else {
+                result.addAll(handlePart(page, totalPages, offset));
+            }
+        }
+        return new ArrayList<>(
+                new java.util.LinkedHashSet<>(result)); // Remove duplicates and maintain order
+    }
+
+    public static List<Integer> evaluateNFunc(String expression, int maxValue) {
+        List<Integer> results = new ArrayList<>();
+        DoubleEvaluator evaluator = new DoubleEvaluator();
+
+        // Validate the expression
+        if (!expression.matches("[0-9n+\\-*/() ]+")) {
+            throw new IllegalArgumentException("Invalid expression");
+        }
 
-                for (int i = 1; i <= totalPages; i++) {
-                    int pageNum = coefficientExists ? coefficient * i : i;
-                    pageNum += constantExists ? constant : 0;
+        int n = 0;
+        while (true) {
+            // Replace 'n' with the current value of n, correctly handling numbers before 'n'
+            String sanitizedExpression = insertMultiplicationBeforeN(expression, n);
+            Double result = evaluator.evaluate(sanitizedExpression);
 
-                    if (pageNum <= totalPages && pageNum > 0) {
-                        newPageOrder.add(pageNum - adjustmentFactor);
+            // Check if the result is null or not within bounds
+            if (result == null || result <= 0 || result.intValue() > maxValue) {
+                if (n != 0) break;
+            } else {
+                results.add(result.intValue());
+            }
+            n++;
+        }
+
+        return results;
+    }
+
+    private static String insertMultiplicationBeforeN(String expression, int nValue) {
+        // Insert multiplication between a number and 'n' (e.g., "4n" becomes "4*n")
+        String withMultiplication = expression.replaceAll("(\\d)n", "$1*n");
+        // Now replace 'n' with its current value
+        return withMultiplication.replaceAll("n", String.valueOf(nValue));
+    }
+
+    private static List<Integer> handlePart(String part, int totalPages, int offset) {
+        List<Integer> partResult = new ArrayList<>();
+
+        // First check for n-syntax because it should not be processed as a range
+        if (part.contains("n")) {
+            partResult = evaluateNFunc(part, totalPages);
+            // Adjust the results according to the offset
+            for (int i = 0; i < partResult.size(); i++) {
+                int adjustedValue = partResult.get(i) - 1 + offset;
+                partResult.set(i, adjustedValue);
+            }
+        } else if (part.contains("-")) {
+            // Process ranges only if it's not n-syntax
+            String[] rangeParts = part.split("-");
+            try {
+                int start = Integer.parseInt(rangeParts[0]);
+                int end = Integer.parseInt(rangeParts[1]);
+                for (int i = start; i <= end; i++) {
+                    if (i >= 1 && i <= totalPages) {
+                        partResult.add(i - 1 + offset);
                     }
                 }
-            } else if (element.contains("-")) {
-                // split the range into start and end page
-                String[] range = element.split("-");
-                int start = Integer.parseInt(range[0]);
-                int end = Integer.parseInt(range[1]);
-                // check if the end page is greater than total pages
-                if (end > totalPages) {
-                    end = totalPages;
-                }
-                // loop through the range of pages
-                for (int j = start; j <= end; j++) {
-                    // print the current index
-                    newPageOrder.add(j - adjustmentFactor);
+            } catch (NumberFormatException e) {
+                // Range is invalid, ignore this part
+            }
+        } else {
+            // This is a single page number
+            try {
+                int pageNum = Integer.parseInt(part.trim());
+                if (pageNum >= 1 && pageNum <= totalPages) {
+                    partResult.add(pageNum - 1 + offset);
                 }
-            } else {
-                // if the element is a single page
-                newPageOrder.add(Integer.parseInt(element) - adjustmentFactor);
+            } catch (NumberFormatException ignored) {
+                // Ignore invalid numbers
             }
         }
-
-        return newPageOrder;
+        return partResult;
     }
 
     public static boolean createDir(String path) {