Add files via upload

Dockerfile

@@ -0,0 +1,5 @@
+FROM openjdk:17-jdk-slim
+COPY build/libs/*.jar app.jar
+EXPOSE 8080
+ENV LOG_LEVEL=INFO
+ENTRYPOINT ["java","-jar","/app.jar","-Dlogging.level=${LOG_LEVEL}"]

Jenkinsfile

@@ -0,0 +1,33 @@
+pipeline {
+    agent any
+    stages {
+        stage('Build') {
+            steps {
+				sh 'chmod 755 gradlew'
+                sh './gradlew build'
+            }
+        }
+        stage('Docker Build') {
+            steps {
+                script {
+                    def appVersion = sh(returnStdout: true, script: './gradlew printVersion -q').trim()
+                    def image = "frooodle/s-pdf:$appVersion"
+                    sh "docker build -t $image ."
+                }
+            }
+        }
+        stage('Docker Push') {
+            steps {
+                script {
+                    def appVersion = sh(returnStdout: true, script: './gradlew printVersion -q').trim()
+                    def image = "frooodle/s-pdf:$appVersion"
+                    withCredentials([string(credentialsId: 'docker_hub_access_token', variable: 'DOCKER_HUB_ACCESS_TOKEN')]) {
+				sh "docker login --username frooodle --password $DOCKER_HUB_ACCESS_TOKEN"
+                        sh "docker push $image"
+                    }
+                }
+            }
+    	
+	}
+   }
+}

README.md

@@ -0,0 +1,44 @@
+# Stirling-PDF
+
+This is a locally hosted web application that allows you to perform various operations on PDF files, such as splitting and adding images.
+
+## Features
+
+- Split PDFs into multiple files at specified page numbers or extract all pages as individual files.
+- Merge multiple PDFs together into a single resultant file
+- Convert PDFs to and from images
+- Reorganize PDF pages into different orders.
+- Add images to PDFs at specified locations.
+- Dark mode support.
+
+## Technologies used
+- Spring Boot + Thymeleaf
+- PDFBox
+- HTML, CSS, JavaScript
+- Docker
+
+## How to use
+
+### Locally 
+
+Prerequisites
+- Java 17 or later
+- Gradle 6.0 or later
+
+1. Clone or download the repository.
+2. Build the project using Gradle by running `./gradlew build`
+3. Start the application by running `./gradlew bootRun`
+
+
+### Docker
+docker pull frooodle/s-pdf
+
+docker run -p 8080:8080 frooodle/s-pdf
+
+
+## How to View
+1. Open a web browser and navigate to `http://localhost:8080/`
+2. Use the application by following the instructions on the website.
+
+## Note
+The application is currently not thread-safe

build.gradle

@@ -0,0 +1,29 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.0.2'
+	id 'io.spring.dependency-management' version '1.1.0'
+}
+
+group = 'stirling.software'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '17'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	implementation 'org.apache.pdfbox:pdfbox:2.0.27'
+	implementation 'log4j:log4j'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
+task printVersion {
+  println project.version
+}
+

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'S-PDF'

src/main/java/stirling/software/SPDF/SPdfApplication.java

@@ -0,0 +1,13 @@
+package stirling.software.SPDF;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SPdfApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SPdfApplication.class, args);
+	}
+
+}

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

@@ -0,0 +1,32 @@
+package stirling.software.SPDF.controller;
+
+import java.io.IOException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Controller;
+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 FromPDFController {
+
+	private static final Logger logger = LoggerFactory.getLogger(FromPDFController.class);
+
+	@GetMapping("/convert-from-pdf")
+	public String convertFromPdfForm() {
+		return "convert-from-pdf";
+	}
+
+	@PostMapping("/convert-from-pdf")
+	public byte[] convertToImage(@RequestParam("fileInput") MultipartFile file,
+			@RequestParam("imageFormat") String imageFormat) throws IOException {
+		byte[] pdfBytes = file.getBytes();
+		return PdfUtils.convertFromPdf(pdfBytes, imageFormat);
+	}
+
+}

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

@@ -0,0 +1,47 @@
+package stirling.software.SPDF.controller;
+
+import java.io.IOException;
+
+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.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 OverlayImageController {
+
+	private static final Logger logger = LoggerFactory.getLogger(OverlayImageController.class);
+
+	@GetMapping("/add-image")
+	public String overlayImage() {
+		return "add-image";
+	}
+
+	@PostMapping("/add-image")
+	public ResponseEntity<byte[]> overlayImage(@RequestParam("fileInput") MultipartFile pdfFile,
+			@RequestParam("fileInput2") MultipartFile imageFile, @RequestParam("x") float x,
+			@RequestParam("y") float y) {
+		try {
+			byte[] pdfBytes = pdfFile.getBytes();
+			byte[] imageBytes = imageFile.getBytes();
+			byte[] result = PdfUtils.overlayImage(pdfBytes, imageBytes, x, y);
+			HttpHeaders headers = new HttpHeaders();
+			headers.setContentType(MediaType.APPLICATION_PDF);
+			headers.setContentDispositionFormData("attachment", "overlayed.pdf");
+			headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
+			return new ResponseEntity<>(result, headers, HttpStatus.OK);
+		} catch (IOException e) {
+			logger.error("Failed to add image to PDF", e);
+			return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+		}
+	}
+}

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

@@ -0,0 +1,88 @@
+package stirling.software.SPDF.controller;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+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.core.io.InputStreamResource;
+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;
+
+@Controller
+public class PdfController {
+
+	private static final Logger logger = LoggerFactory.getLogger(PdfController.class);
+
+	@GetMapping("/")
+	public String root(Model model) {
+		return "redirect:/home";
+	}
+
+	@GetMapping("/merge-pdfs")
+	public String hello(Model model) {
+		model.addAttribute("message", "Hello, World!");
+		return "merge-pdfs";
+	}
+
+	@GetMapping("/home")
+	public String home(Model model) {
+		model.addAttribute("message", "Hello, World!");
+		return "home";
+	}
+
+	@PostMapping("/merge-pdfs")
+	public ResponseEntity<InputStreamResource> mergePdfs(@RequestParam("fileInput") MultipartFile[] files)
+			throws IOException {
+		// Read the input PDF files into PDDocument objects
+		List<PDDocument> documents = new ArrayList<>();
+
+		// Loop through the files array and read each file into a PDDocument
+		for (MultipartFile file : files) {
+			documents.add(PDDocument.load(file.getInputStream()));
+		}
+
+		PDDocument mergedDoc = mergeDocuments(documents);
+		ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+		mergedDoc.save(byteArrayOutputStream);
+		mergedDoc.close();
+
+		// Create an InputStreamResource from the merged PDF
+		InputStreamResource resource = new InputStreamResource(
+				new ByteArrayInputStream(byteArrayOutputStream.toByteArray()));
+
+		// Return the merged PDF as a response
+		return ResponseEntity.ok().contentType(MediaType.APPLICATION_PDF).body(resource);
+	}
+
+	private PDDocument mergeDocuments(List<PDDocument> documents) throws IOException {
+		// Create a new empty document
+		PDDocument mergedDoc = new PDDocument();
+
+		// Iterate over the list of documents and add their pages to the merged document
+		for (PDDocument doc : documents) {
+			// Get all pages from the current document
+			PDPageTree pages = doc.getPages();
+			// Iterate over the pages and add them to the merged document
+			for (PDPage page : pages) {
+				mergedDoc.addPage(page);
+			}
+		}
+
+		// Return the merged document
+		return mergedDoc;
+	}
+
+}

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

@@ -0,0 +1,107 @@
+package stirling.software.SPDF.controller;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+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;
+
+@Controller
+public class RearrangePagesPDFController {
+
+	private static final Logger logger = LoggerFactory.getLogger(RearrangePagesPDFController.class);
+
+	@GetMapping("/pdf-organizer")
+	public String pageOrganizer(Model model) {
+		return "pdf-organizer";
+	}
+
+	@PostMapping("/rearrange-pages")
+	public ResponseEntity<byte[]> rearrangePages(@RequestParam("fileInput") MultipartFile pdfFile,
+			@RequestParam("pageOrder") String pageOrder) {
+		try {
+			// Load the input PDF
+			PDDocument document = PDDocument.load(pdfFile.getInputStream());
+
+			// Split the page order string into an array of page numbers or range of numbers
+			String[] pageOrderArr = pageOrder.split(",");
+			List<Integer> newPageOrder = new ArrayList<Integer>();
+			//int[] newPageOrder = new int[pageOrderArr.length];
+			int totalPages = document.getNumberOfPages();
+
+			// loop through the page order array
+			for (String element : pageOrderArr) {
+				// check if the element contains a range of pages
+				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 - 1);
+					}
+				} else {
+					// if the element is a single page
+					newPageOrder.add( Integer.parseInt(element) - 1);
+				}
+			}
+
+			// Create a new list to hold the pages in the new order
+			List<PDPage> newPages = new ArrayList<>();
+			for (int i = 0; i < newPageOrder.size(); i++) {
+				newPages.add(document.getPage(newPageOrder.get(i)));
+			}
+
+			// Remove all the pages from the original document
+			for (int i = document.getNumberOfPages() - 1; i >= 0; i--) {
+				document.removePage(i);
+			}
+
+			// Add the pages in the new order
+			for (PDPage page : newPages) {
+				document.addPage(page);
+			}
+
+			// Save the rearranged PDF to a ByteArrayOutputStream
+			ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+			document.save(outputStream);
+
+			// Close the original document
+			document.close();
+
+			// Prepare the response headers
+			HttpHeaders headers = new HttpHeaders();
+			headers.setContentType(MediaType.APPLICATION_PDF);
+			headers.setContentDispositionFormData("attachment", "rearranged.pdf");
+			headers.setContentLength(outputStream.size());
+
+			// Return the response with the PDF data and headers
+			return new ResponseEntity<>(outputStream.toByteArray(), headers, HttpStatus.OK);
+		} catch (IOException e) {
+
+			logger.error("Failed rearranging documents", e);
+			return null;
+		}
+	}
+
+}

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

@@ -0,0 +1,140 @@
+package stirling.software.SPDF.controller;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.io.ByteArrayResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+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;
+
+@Controller
+public class SplitPDFController {
+
+	private static final Logger logger = LoggerFactory.getLogger(SplitPDFController.class);
+
+	@GetMapping("/split-pdfs")
+	public String splitPdfForm() {
+		return "split-pdfs";
+	}
+
+	@PostMapping("/split-pages")
+	public ResponseEntity<Resource> splitPdf(@RequestParam("fileInput") MultipartFile file,
+			@RequestParam("pages") String pages) throws IOException {
+		// parse user input
+
+		// open the pdf document
+		InputStream inputStream = file.getInputStream();
+		PDDocument document = PDDocument.load(inputStream);
+
+		List<Integer> pageNumbers = new ArrayList<>();
+		pages = pages.replaceAll("\\s+", ""); // remove whitespaces
+		if (pages.toLowerCase().equals("all")) {
+			for (int i = 0; i < document.getNumberOfPages(); i++) {
+				pageNumbers.add(i);
+			}
+		} else {
+			List<String> pageNumbersStr = new ArrayList<>(Arrays.asList(pages.split(",")));
+			if (!pageNumbersStr.contains(String.valueOf(document.getNumberOfPages()))) {
+				String lastpage = String.valueOf(document.getNumberOfPages());
+				pageNumbersStr.add(lastpage);
+			}
+			for (String page : pageNumbersStr) {
+				if (page.contains("-")) {
+					String[] range = page.split("-");
+					int start = Integer.parseInt(range[0]);
+					int end = Integer.parseInt(range[1]);
+					for (int i = start; i <= end; i++) {
+						pageNumbers.add(i);
+					}
+				} else {
+					pageNumbers.add(Integer.parseInt(page));
+				}
+			}
+		}
+
+		logger.info("Splitting PDF into pages: {}",
+				pageNumbers.stream().map(String::valueOf).collect(Collectors.joining(",")));
+
+		// split the document
+		List<ByteArrayOutputStream> splitDocumentsBoas = new ArrayList<>();
+		int currentPage = 0;
+		for (int pageNumber : pageNumbers) {
+			try (PDDocument splitDocument = new PDDocument()) {
+				for (int i = currentPage; i < pageNumber; i++) {
+					PDPage page = document.getPage(i);
+					splitDocument.addPage(page);
+					logger.debug("Adding page {} to split document", i);
+				}
+				currentPage = pageNumber;
+				logger.debug("Setting current page to {}", currentPage);
+
+				ByteArrayOutputStream baos = new ByteArrayOutputStream();
+				splitDocument.save(baos);
+
+				splitDocumentsBoas.add(baos);
+			} catch (Exception e) {
+				logger.error("Failed splitting documents and saving them", e);
+				throw e;
+			}
+		}
+
+		// closing the original document
+		document.close();
+
+		// create the zip file
+		Path zipFile = Paths.get("split_documents.zip");
+		URI uri = URI.create("jar:file:" + zipFile.toUri().getPath());
+		Map<String, String> env = new HashMap<>();
+		env.put("create", "true");
+		FileSystem zipfs = FileSystems.newFileSystem(uri, env);
+
+		// loop through the split documents and write them to the zip file
+		for (int i = 0; i < splitDocumentsBoas.size(); i++) {
+			String fileName = "split_document_" + (i + 1) + ".pdf";
+			ByteArrayOutputStream baos = splitDocumentsBoas.get(i);
+			byte[] pdf = baos.toByteArray();
+			Path pathInZipfile = zipfs.getPath(fileName);
+			try (OutputStream os = Files.newOutputStream(pathInZipfile)) {
+				os.write(pdf);
+				logger.info("Wrote split document {} to zip file", fileName);
+			} catch (Exception e) {
+				logger.error("Failed writing to zip", e);
+				throw e;
+			}
+		}
+		zipfs.close();
+		logger.info("Successfully created zip file with split documents: {}", zipFile.toString());
+		byte[] data = Files.readAllBytes(zipFile);
+		ByteArrayResource resource = new ByteArrayResource(data);
+		new File("split_documents.zip").delete();
+		// return the Resource in the response
+		return ResponseEntity.ok().header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=split_documents.zip")
+				.contentType(MediaType.APPLICATION_OCTET_STREAM).contentLength(resource.contentLength()).body(resource);
+	}
+}

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

@@ -0,0 +1,43 @@
+package stirling.software.SPDF.controller;
+
+import java.io.IOException;
+
+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.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 ToPDFController {
+
+	private static final Logger logger = LoggerFactory.getLogger(ToPDFController.class);
+
+	@GetMapping("/convert-to-pdf")
+	public String convertToPdfForm() {
+		return "convert-to-pdf";
+	}
+
+	@PostMapping("/convert-to-pdf")
+	public ResponseEntity<byte[]> convertToPdf(@RequestParam("fileInput") MultipartFile file) throws IOException {
+		// Convert the file to PDF and get the resulting bytes
+		byte[] bytes = PdfUtils.convertToPdf(file.getInputStream());
+		logger.info("File {} successfully converted to pdf", file.getOriginalFilename());
+
+		HttpHeaders headers = new HttpHeaders();
+		headers.setContentType(MediaType.APPLICATION_PDF);
+		String filename = "converted.pdf";
+		headers.setContentDispositionFormData(filename, filename);
+		headers.setCacheControl("must-revalidate, post-check=0, pre-check=0");
+		ResponseEntity<byte[]> response = new ResponseEntity<>(bytes, headers, HttpStatus.OK);
+		return response;
+	}
+}

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

@@ -0,0 +1,124 @@
+package stirling.software.SPDF.utils;
+
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Iterator;
+
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+import javax.imageio.ImageWriter;
+import javax.imageio.stream.ImageOutputStream;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
+import org.apache.pdfbox.rendering.ImageType;
+import org.apache.pdfbox.rendering.PDFRenderer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class PdfUtils {
+
+	private static final Logger logger = LoggerFactory.getLogger(PdfUtils.class);
+
+	public static byte[] convertToPdf(InputStream imageStream) throws IOException {
+
+		// Create a File object for the image
+		File imageFile = new File("image.jpg");
+
+		try (FileOutputStream fos = new FileOutputStream(imageFile); InputStream input = imageStream) {
+			byte[] buffer = new byte[1024];
+			int len;
+			// Read from the input stream and write to the file
+			while ((len = input.read(buffer)) != -1) {
+				fos.write(buffer, 0, len);
+			}
+			logger.info("Image successfully written to file: {}", imageFile.getAbsolutePath());
+		} catch (IOException e) {
+			logger.error("Error writing image to file: {}", imageFile.getAbsolutePath(), e);
+			throw e;
+		}
+
+		try (PDDocument doc = new PDDocument()) {
+			// Create a new PDF page
+			PDPage page = new PDPage();
+			doc.addPage(page);
+
+			// Create an image object from the image file
+			PDImageXObject image = PDImageXObject.createFromFileByContent(imageFile, doc);
+
+			try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
+				// Draw the image onto the page
+				contentStream.drawImage(image, 0, 0);
+				logger.info("Image successfully added to PDF");
+			} catch (IOException e) {
+				logger.error("Error adding image to PDF", e);
+				throw e;
+			}
+
+			// Create a ByteArrayOutputStream to save the PDF to
+			ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+			doc.save(byteArrayOutputStream);
+			logger.info("PDF successfully saved to byte array");
+			return byteArrayOutputStream.toByteArray();
+		}
+	}
+
+	public static byte[] convertFromPdf(byte[] inputStream, String imageType) throws IOException {
+		try (PDDocument document = PDDocument.load(new ByteArrayInputStream(inputStream))) {
+			// Create a PDFRenderer to convert the PDF to an image
+			PDFRenderer pdfRenderer = new PDFRenderer(document);
+			BufferedImage bim = pdfRenderer.renderImageWithDPI(0, 300, ImageType.RGB);
+
+			// Get an ImageWriter for the specified image type
+			Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(imageType);
+			ImageWriter writer = writers.next();
+
+			// Create a ByteArrayOutputStream to save the image to
+			ByteArrayOutputStream baos = new ByteArrayOutputStream();
+			try (ImageOutputStream ios = ImageIO.createImageOutputStream(baos)) {
+				writer.setOutput(ios);
+				// Write the image to the output stream
+				writer.write(new IIOImage(bim, null, null));
+				// Log that the image was successfully written to the byte array
+				logger.info("Image successfully written to byte array");
+			}
+			return baos.toByteArray();
+		} catch (IOException e) {
+			// Log an error message if there is an issue converting the PDF to an image
+			logger.error("Error converting PDF to image", e);
+			throw e;
+		}
+	}
+
+	public static byte[] overlayImage(byte[] pdfBytes, byte[] imageBytes, float x, float y) throws IOException {
+
+		try (PDDocument document = PDDocument.load(new ByteArrayInputStream(pdfBytes))) {
+			// Get the first page of the PDF
+			PDPage page = document.getPage(0);
+			try (PDPageContentStream contentStream = new PDPageContentStream(document, page,
+					PDPageContentStream.AppendMode.APPEND, true)) {
+				// Create an image object from the image bytes
+				PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "");
+				// Draw the image onto the page at the specified x and y coordinates
+				contentStream.drawImage(image, x, y);
+				logger.info("Image successfully overlayed onto PDF");
+			}
+			// Create a ByteArrayOutputStream to save the PDF to
+			ByteArrayOutputStream baos = new ByteArrayOutputStream();
+			document.save(baos);
+			logger.info("PDF successfully saved to byte array");
+			return baos.toByteArray();
+		} catch (IOException e) {
+			// Log an error message if there is an issue overlaying the image onto the PDF
+			logger.error("Error overlaying image onto PDF", e);
+			throw e;
+		}
+	}
+}

src/main/resources/application.properties

@@ -0,0 +1,9 @@
+spring.http.multipart.max-file-size=1GB
+spring.http.multipart.max-request-size=1GB
+
+multipart.enabled=true
+multipart.max-file-size=1000MB
+multipart.max-request-size=1000MB
+
+spring.servlet.multipart.max-file-size=1000MB
+spring.servlet.multipart.max-request-size=1000MB

src/main/resources/log4j.properties

@@ -0,0 +1,8 @@
+log4j.rootLogger=ERROR,stdout
+log4j.logger.com.endeca=INFO
+# Logger for crawl metrics
+log4j.logger.com.endeca.itl.web.metrics=INFO
+
+log4j.appender.stdout=org.apache.log4j.ConsoleAppender
+log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
+log4j.appender.stdout.layout.ConversionPattern=%p\t%d{ISO8601}\t%r\t%c\t[%t]\t%m%n

src/main/resources/static/dark-mode.css

@@ -0,0 +1,14 @@
+/* Dark Mode Styles */
+body {
+    background-color: #333;
+    color: #fff;
+}
+
+.dark-card {
+  background-color: #333 !important;
+  color: white;
+}
+.jumbotron {
+  background-color: #222; /* or any other dark color */
+  color: #fff; /* or any other light color */
+}

src/main/resources/static/favicon.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256" viewBox="0 0 100 100"><rect width="100" height="100" rx="50" fill="#000000"></rect><path fill="#ffffff" d="M22.76 53.83L18.32 53.83L18.32 63.29Q18.06 63.38 17.62 63.49Q17.18 63.60 16.65 63.60L16.65 63.60Q14.71 63.60 14.71 61.97L14.71 61.97L14.71 38.56Q14.71 37.86 15.06 37.48Q15.42 37.11 16.16 36.89L16.16 36.89Q17.44 36.49 19.27 36.32Q21.09 36.14 22.81 36.14L22.81 36.14Q28.40 36.14 30.97 38.49Q33.54 40.85 33.54 44.85L33.54 44.85Q33.54 48.94 30.90 51.39Q28.26 53.83 22.76 53.83L22.76 53.83ZM18.28 50.84L22.54 50.84Q26.06 50.84 28.00 49.38Q29.94 47.93 29.94 44.90L29.94 44.90Q29.94 41.90 28.07 40.52Q26.20 39.13 22.72 39.13L22.72 39.13Q21.53 39.13 20.37 39.24Q19.20 39.35 18.28 39.53L18.28 39.53L18.28 50.84ZM58.40 49.69L58.40 49.69Q58.40 46.88 57.55 44.87Q56.69 42.87 55.21 41.60Q53.74 40.32 51.78 39.73Q49.82 39.13 47.58 39.13L47.58 39.13Q46.17 39.13 45.14 39.22Q44.10 39.31 43.22 39.48L43.22 39.48L43.22 60.43Q44.28 60.69 45.49 60.78Q46.70 60.87 47.98 60.87L47.98 60.87Q53.17 60.87 55.79 58.05Q58.40 55.24 58.40 49.69ZM62.06 49.69L62.06 49.69Q62.06 53.30 61.07 55.96Q60.08 58.62 58.25 60.38Q56.42 62.14 53.83 63.00Q51.23 63.86 48.02 63.86L48.02 63.86Q46.61 63.86 44.85 63.75Q43.09 63.64 41.51 63.16L41.51 63.16Q39.66 62.58 39.66 61.13L39.66 61.13L39.66 38.52Q39.66 37.81 40.01 37.44Q40.36 37.06 41.11 36.84L41.11 36.84Q42.48 36.40 44.19 36.27Q45.91 36.14 47.62 36.14L47.62 36.14Q50.84 36.14 53.50 37.00Q56.16 37.86 58.05 39.55Q59.94 41.24 61 43.77Q62.06 46.30 62.06 49.69ZM70.28 36.62L84.89 36.62Q85.02 36.84 85.16 37.22Q85.29 37.59 85.29 38.03L85.29 38.03Q85.29 38.78 84.94 39.22Q84.58 39.66 83.92 39.66L83.92 39.66L71.96 39.66L71.96 48.81L83.35 48.81Q83.48 49.03 83.62 49.41Q83.75 49.78 83.75 50.22L83.75 50.22Q83.75 50.97 83.40 51.41Q83.04 51.85 82.38 51.85L82.38 51.85L71.96 51.85L71.96 63.33Q71.74 63.42 71.27 63.51Q70.81 63.60 70.33 63.60L70.33 63.60Q68.35 63.60 68.35 62.01L68.35 62.01L68.35 38.56Q68.35 37.68 68.88 37.15Q69.40 36.62 70.28 36.62L70.28 36.62Z"></path></svg>

src/main/resources/static/general.css

@@ -0,0 +1,5 @@
+#footer {
+  position: absolute;
+  bottom: 0;
+  width: 100%;
+}

src/main/resources/templates/add-image.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF Add-Image</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6">
+				<h2>Add image to PDF</h2>
+
+
+
+				<form method="post" th:action="@{/add-image}"
+					enctype="multipart/form-data">
+
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput"
+							name="fileInput" required> <label
+							class="custom-file-label" for="fileInput">Choose PDF</label>
+					</div>
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput2"
+							name="fileInput2" required> <label
+							class="custom-file-label" for="fileInput2">Choose Image</label>
+					</div>
+					<div class="form-group">
+						<label for="x">X</label> <input type="number" class="form-control"
+							id="x" name="x" step="0.01" required>
+					</div>
+					<div class="form-group">
+						<label for="y">Y</label> <input type="number" class="form-control"
+							id="y" name="y" step="0.01" required>
+					</div>
+					<button type="submit" class="btn btn-primary">Submit</button>
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+
+</html>

src/main/resources/templates/common.html

@@ -0,0 +1,77 @@
+<head th:fragment="head">
+<link rel="shortcut icon" href="favicon.svg">
+<script
+	src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.1/jquery.min.js"></script>
+<link rel="stylesheet"
+	href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
+<script
+	src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
+<meta charset="UTF-8">
+
+<link rel="stylesheet" th:href="@{dark-mode.css}" id="dark-mode-styles">
+<script>
+    function toggleDarkMode() {
+        var checkbox = document.getElementById("toggle-dark-mode");
+        var darkModeStyles = document.getElementById("dark-mode-styles");
+        if (checkbox.checked) {
+        	localStorage.setItem("dark-mode", "on");
+            darkModeStyles.disabled = false;
+        } else {
+        	localStorage.setItem("dark-mode", "off");
+            darkModeStyles.disabled = true;
+        }
+    }
+    $(document).ready(function () {
+    	var darkModeStyles = document.getElementById("dark-mode-styles");
+    	var checkbox = document.getElementById("toggle-dark-mode");
+    	if(localStorage.getItem("dark-mode") == "on"){
+    		darkModeStyles.disabled = false;
+    		checkbox.checked = true;
+    	}
+    	if(localStorage.getItem("dark-mode") == "off"){
+    		darkModeStyles.disabled = true;
+    		checkbox.checked = false;
+    	}
+    
+    });
+	</script>
+<link rel="stylesheet" href="general.css">
+</head>
+
+<th:block th:fragment="filelist">
+	<div id="fileList"></div>
+	<div id="fileList2"></div>
+	<script>
+	var input = document.getElementById("fileInput");
+	var output = document.getElementById("fileList");
+	
+		input.addEventListener("change", function() {
+		  var files = input.files;
+		  var fileNames = "";
+		
+		  for (var i = 0; i < files.length; i++) {
+		    fileNames += (i + 1) + ". " + files[i].name + "<br>";
+		  }
+		
+		  output.innerHTML = fileNames;
+		});
+	
+	</script>
+	<script>
+	var input2 = document.getElementById("fileInput2");
+	var output2 = document.getElementById("fileList2");
+	if(input2 != null && !input2) {
+		input2.addEventListener("change", function() {
+		  var files = input2.files;
+		  var fileNames = "";
+		
+		  for (var i = 0; i < files.length; i++) {
+		    fileNames += (i + 1) + ". " + files[i].name + "<br>";
+		  }
+		
+		  output2.innerHTML = fileNames;
+		});
+	}
+	</script>
+</th:block>
+

src/main/resources/templates/convert-from-pdf.html

@@ -0,0 +1,41 @@
+
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF ConvertFromPDF</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6">
+				<h2>PDF to img</h2>
+				<form method="post" enctype="multipart/form-data"
+					th:action="@{/convert-to-image}">
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput"
+							name="fileInput" required> <label
+							class="custom-file-label" for="fileInput">Choose PDF</label>
+					</div>
+					<div class="form-group">
+						<label>Image Format</label> <select class="form-control"
+							name="imageFormat">
+							<option value="jpg">JPEG</option>
+							<option value="png">PNG</option>
+							<option value="gif">GIF</option>
+						</select>
+					</div>
+					<button type="submit" class="btn btn-primary">Convert</button>
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>

src/main/resources/templates/convert-to-pdf.html

@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF ConvertToPDF</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6">
+				<h2>Image to PDF</h2>
+
+				<form method="post" enctype="multipart/form-data"
+					th:action="@{/convert-to-pdf}">
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput"
+							name="fileInput" required> <label
+							class="custom-file-label" for="fileInput">Choose Image</label>
+					</div>
+					<button type="submit" class="btn btn-primary">Convert</button>
+
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>

src/main/resources/templates/footer.html

@@ -0,0 +1,11 @@
+<div th:fragment="footer">
+	<link rel="stylesheet"
+		href="https://use.fontawesome.com/releases/v5.6.1/css/all.css">
+	<footer id="footer" class="text-center py-3">
+		<a href="https://github.com/Frooodle" target="_blank" class="mx-1">
+			<i class="fab fa-github fa-2x"></i>
+		</a> <a href="https://hub.docker.com/u/frooodle" target="_blank"
+			class="mx-1"> <i class="fab fa-docker fa-2x"></i>
+		</a>
+	</footer>
+</div>

src/main/resources/templates/home.html

@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<!-- Jumbotron -->
+	<div class="jumbotron jumbotron-fluid" id="jumbotron">
+		<div class="container">
+			<h1 class="display-4">Stirling PDF</h1>
+			<p class="lead">Your locally hosted one-stop-shop for all your
+				PDF needs. (Made 100% in ChatGPT in 1 day as a experiment)</p>
+		</div>
+	</div>
+
+	<!-- Features -->
+	<div class="container">
+		<div class="row h-100">
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body">
+						<h5 class="card-title">Merge PDFs</h5>
+						<p class="card-text">Easily merge multiple PDFs into one.</p>
+						<a href="#" class="btn btn-primary" th:href="@{/merge-pdfs}">Go</a>
+					</div>
+				</div>
+			</div>
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body">
+						<h5 class="card-title">Split PDFs</h5>
+						<p class="card-text">Split your PDFs into multiple single-page
+							documents or at specific page numbers.</p>
+						<a href="#" class="btn btn-primary" th:href="@{/split-pdfs}">Go</a>
+					</div>
+				</div>
+			</div>
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body">
+						<h5 class="card-title">Convert to PDF</h5>
+						<p class="card-text">Convert images to PDF.</p>
+						<a href="#" class="btn btn-primary" th:href="@{/convert-to-pdf}">Go</a>
+					</div>
+				</div>
+			</div>
+		</div>
+		<div class="row h-100">
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body dark-card">
+						<h5 class="card-title">Convert from PDF</h5>
+						<p class="card-text">Convert PDF to Image.</p>
+						<a href="#" class="btn btn-primary" th:href="@{/convert-from-pdf}">Go</a>
+					</div>
+				</div>
+			</div>
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body">
+						<h5 class="card-title">Add image to PDF</h5>
+						<p class="card-text">Adds image/watermark to a PDF</p>
+						<a href="#" class="btn btn-primary" th:href="@{/add-image}">Go</a>
+					</div>
+				</div>
+			</div>
+			<div class="col-4 h-100">
+				<div class="dark-card card">
+					<div class="card-body">
+						<h5 class="card-title">PDF Organizer</h5>
+						<p class="card-text">Rearrange PDF pages into any order (or
+							remove)</p>
+						<a href="#" class="btn btn-primary" th:href="@{/pdf-organizer}">Go</a>
+					</div>
+				</div>
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>

src/main/resources/templates/merge-pdfs.html

@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF MergePDFs</title>
+
+<script>
+dropContainer.ondragover = dropContainer.ondragenter = function(evt) {
+  evt.preventDefault();
+};
+
+dropContainer.ondrop = function(evt) {
+  // pretty simple -- but not for IE :(
+  fileInput.files = evt.dataTransfer.files;
+
+  // If you want to use some of the dropped files
+  const dT = new DataTransfer();
+  dT.items.add(evt.dataTransfer.files[0]);
+  dT.items.add(evt.dataTransfer.files[3]);
+  fileInput.files = dT.files;
+
+  evt.preventDefault();
+};
+</script>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6" id="dropContainer">
+				<h2>Merge multiple PDFs (2+)</h2>
+				<form action="/merge-pdfs" method="post"
+					enctype="multipart/form-data">
+					<div class="form-group">
+						<label>Select (or drag & drop) all PDFs to merge</label>
+						<div class="custom-file">
+							<input type="file" class="custom-file-input" id="fileInput"
+								name="fileInput" multiple> <label
+								class="custom-file-label">Choose PDFs</label>
+						</div>
+					</div>
+					<div class="form-group text-center">
+						<button type="submit" class="btn btn-primary">Merge</button>
+					</div>
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+
+
+
+
+
+
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>

src/main/resources/templates/navbar.html

@@ -0,0 +1,47 @@
+<div th:fragment="navbar">
+	<nav class="navbar navbar-expand-lg navbar-light bg-light">
+		<div class="container">
+			<a class="navbar-brand" href="#" th:href="@{/home}">Stirling PDF</a>
+			<button class="navbar-toggler" type="button" data-toggle="collapse"
+				data-target="#navbarNav" aria-controls="navbarNav"
+				aria-expanded="false" aria-label="Toggle navigation">
+				<span class="navbar-toggler-icon"></span>
+			</button>
+			<div class="collapse navbar-collapse" id="navbarNav">
+				<ul class="navbar-nav">
+
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/merge-pdfs}"
+						th:classappend="${currentPage}=='/merge-pdfs' ? 'active' : ''">Merge
+							PDFs</a></li>
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/split-pdfs}"
+						th:classappend="${currentPage}=='/split-pdfs' ? 'active' : ''">Split
+							PDFs</a></li>
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/convert-to-pdf}"
+						th:classappend="${currentPage}=='/convert-to-pdf' ? 'active' : ''">Convert
+							to PDF</a></li>
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/convert-from-pdf}"
+						th:classappend="${currentPage}=='/convert-from-pdf' ? 'active' : ''">Convert
+							from PDF</a></li>
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/add-image}"
+						th:classappend="${currentPage}=='/add-image' ? 'active' : ''">Add
+							image to PDF</a></li>
+					<li class="nav-item"><a class="nav-link" href="#"
+						th:href="@{/pdf-organizer}"
+						th:classappend="${currentPage}=='/pdf-organizer' ? 'active' : ''">PDF
+							Organizer</a></li>
+
+					<input type="checkbox" id="toggle-dark-mode"
+						th:onclick="javascript:toggleDarkMode()">
+					<a class="nav-link" href="#" for="toggle-dark-mode">Dark Mode</a>
+
+				</ul>
+
+			</div>
+		</div>
+	</nav>
+</div>

src/main/resources/templates/pdf-organizer.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF Organizer</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6">
+				<h2>PDF Page Organizer</h2>
+
+
+
+				<form th:action="@{/rearrange-pages}" method="post"
+					enctype="multipart/form-data">
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput"
+							name="fileInput" required> <label
+							class="custom-file-label" for="fileInput">Choose PDF</label>
+					</div>
+					<div class="form-group">
+						<label for="pageOrder">Page Order (Enter a comma-separated
+							list of page numbers) :</label> <input type="text" class="form-control"
+							id="fileInput" name="pageOrder"
+							placeholder="(e.g. 1,3,2 or 4-8,2,10-12)" required>
+					</div>
+					<button type="submit" class="btn btn-primary">Rearrange
+						Pages</button>
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>

src/main/resources/templates/split-pdfs.html

@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+<th:block th:insert="~{common :: head}"></th:block>
+<title>S-PDF Split PDFs</title>
+</head>
+
+<body>
+	<div th:insert="~{navbar.html :: navbar}"></div>
+	<br>
+	<br>
+	<div class="container">
+		<div class="row justify-content-center">
+			<div class="col-md-6">
+				<h1>Split PDF</h1>
+				<p>The numbers you select are the page number you wish to do a
+					split on</p>
+				<p>As such selecting 1,3,7-8 would split a 12 page document into
+					6 separate PDFS with:</p>
+				<p>Document #1: Page 1</p>
+				<p>Document #2: Page 2 and 3</p>
+				<p>Document #3: Page 4, 5 and 6</p>
+				<p>Document #4: Page 7</p>
+				<p>Document #5: Page 8</p>
+				<p>Document #6: Page 9 and 10</p>
+
+				<form th:action="@{/split-pages}" method="post"
+					enctype="multipart/form-data">
+					<div class="custom-file">
+						<input type="file" class="custom-file-input" id="fileInput"
+							name="fileInput" required> <label
+							class="custom-file-label" for="fileInput">Choose PDF</label>
+					</div>
+
+					<div class="form-group">
+						<label for="pages">Enter pages to split on:</label> <input
+							type="text" class="form-control" id="pages" name="pages"
+							placeholder="1,3,5-10">
+					</div>
+					<br>
+					<button type="submit" class="btn btn-primary">Submit</button>
+				</form>
+				<th:block th:insert="~{common :: filelist}"></th:block>
+			</div>
+		</div>
+	</div>
+	<div th:insert="~{footer.html :: footer}"></div>
+</body>
+</html>