feat: Generate PDF report for single scan mode

doc/docs/user-guide/cli/cli_file.md

@@ -44,12 +44,15 @@ Example:
     java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=</path/to/file/or/folder>
     ```
 
-* Optionally, generate an HTML report and save it in a specified folder using flag `--build.html.report`.
-  Replace `path/to/your/folder` with the full path to the folder where you want to save the HTML report,
-  and `your_report_filename.html` with the desired filename for the report.
+* Optionally, generate an HTML report and save it in a specified folder using flag `--build.html.report`,
+  or PDF report using flag `--build.pdf.report`.
+  Replace `path/to/your/folder` with the full path to the folder where you want to save the HTML/PDF report,
+  and `your_report_filename.html` or `your_report_filename.pdf` with the desired filename for the report.
 
 ```bash
 java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=</path/to/file/or/folder> --build.html.report=<your_report_filename.html>
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=</path/to/file/or/folder> --build.pdf.report=<your_report_filename.pdf>
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=</path/to/file/or/folder> --build.html.report=<your_report_filename.html> --build.pdf.report=<your_report_filename.pdf>
 ```
 
 !!! warning
@@ -61,4 +64,6 @@ Examples of the command:
 ```bash
 java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=test.c
 java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=test_folder --build.html.report=test/report.html
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=test_folder --build.pdf.report=test/report.pdf
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --local.path=test_folder --build.html.report=test/report.html --build.pdf.report=test/report.pdf
 ```

doc/docs/user-guide/cli/cli_pr.md

@@ -44,12 +44,15 @@ Example:
     java -jar -Dspring.profiles.active=singlescan -Dgithub.token=<my-token> lpvs-*.jar --github.pull.request=<PR URL>
     ```
 
-* Optionally, generate an HTML report and save it in a specified folder using flag `--build.html.report`. 
-Replace `path/to/your/folder` with the full path to the folder where you want to save the HTML report, 
-and `your_report_filename.html` with the desired filename for the report.
+* Optionally, generate an HTML report and save it in a specified folder using flag `--build.html.report`,
+or PDF report using flag `--build.pdf.report`.
+Replace `path/to/your/folder` with the full path to the folder where you want to save the HTML/PDF report, 
+and `your_report_filename.html` or `your_report_filename.pdf` with the desired filename for the report.
 
 ```bash
 java -jar -Dspring.profiles.active=singlescan -Dgithub.token=<my-token> lpvs-*.jar --github.pull.request=<PR URL> --build.html.report=</path/to/your/folder/your_report_filename.html>
+java -jar -Dspring.profiles.active=singlescan -Dgithub.token=<my-token> lpvs-*.jar --github.pull.request=<PR URL> --build.pdf.report=</path/to/your/folder/your_report_filename.pdf>
+java -jar -Dspring.profiles.active=singlescan -Dgithub.token=<my-token> lpvs-*.jar --github.pull.request=<PR URL> --build.html.report=</path/to/your/folder/your_report_filename.html> --build.pdf.report=</path/to/your/folder/your_report_filename.pdf>
 ```
 
 !!! warning
@@ -61,4 +64,6 @@ Examples of the command:
 ```bash
 java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --github.pull.request=https://github.com/Samsung/LPVS/pull/2
 java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --github.pull.request=https://github.com/Samsung/LPVS/pull/2 --build.html.report=report.html
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --github.pull.request=https://github.com/Samsung/LPVS/pull/2 --build.pdf.report=report.pdf
+java -jar -Dspring.profiles.active=singlescan lpvs-*.jar --github.pull.request=https://github.com/Samsung/LPVS/pull/2 --build.html.report=report.html --build.pdf.report=report.pdf
 ```

doc/docs/user-guide/config/options.md

@@ -104,6 +104,9 @@ The following command line options are available:
 - `--build.html.report`: This setting specifies the path to the HTML report file which will be generated after the scan.
 If it is not specified, no HTML report will be generated and result of the scan will be displayed in the console.
 
+- `--build.pdf.report`: This setting specifies the path to the PDF report file which will be generated after the scan.
+If it is not specified, no PDF report will be generated and result of the scan will be displayed in the console.
+
 - `--github.pull.request`: This setting specifies the pull request URL which should be scanned by the LPVS application.
 
 - `--local.path`: This setting specifies the path to the local file or folder which should be scanned by the LPVS application.

pom.xml

@@ -38,6 +38,16 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>com.openhtmltopdf</groupId>
+            <artifactId>openhtmltopdf-core</artifactId>
+            <version>1.0.10</version>
+        </dependency>
+        <dependency>
+            <groupId>com.openhtmltopdf</groupId>
+            <artifactId>openhtmltopdf-pdfbox</artifactId>
+            <version>1.0.10</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>

src/main/java/com/lpvs/entity/report/LPVSReportBuilder.java

@@ -12,6 +12,8 @@
 import com.lpvs.entity.enums.LPVSVcs;
 import com.lpvs.entity.LPVSConflict;
 import com.lpvs.util.LPVSCommentUtil;
+import com.openhtmltopdf.outputdevice.helper.BaseRendererBuilder;
+import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
 import io.micrometer.common.util.StringUtils;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -22,10 +24,7 @@
 import org.thymeleaf.TemplateEngine;
 import org.thymeleaf.context.Context;
 
-import java.io.BufferedWriter;
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
+import java.io.*;
 import java.nio.charset.StandardCharsets;
 import java.text.SimpleDateFormat;
 import java.util.*;
@@ -245,6 +244,32 @@ public static void saveHTMLToFile(String htmlContent, String filePath) {
         }
     }
 
+    /**
+     * Saves PDF report to given location.
+     *
+     * @param htmlContent   The string, containing report in HTML format.
+     * @param filePath      The path to expected pdf report file.
+     */
+    public static void generatePdfFromHtml(String htmlContent, String filePath) {
+        String report =
+                htmlContent
+                        .replaceAll(" class=\"panel\"", "")
+                        .replaceAll("<script>[\\s\\S]*?</script>", "")
+                        .replaceAll("<button.*</button>", "")
+                        .replaceAll("body [\\s\\S]*?}", "");
+        try (FileOutputStream os = new FileOutputStream(filePath)) {
+            PdfRendererBuilder builder = new PdfRendererBuilder();
+            builder.withHtmlContent(report, new File(filePath).toURI().toString())
+                    // Size for the standard A4 landscape page
+                    .useDefaultPageSize(11.7f, 8.3f, BaseRendererBuilder.PageSizeUnits.INCHES)
+                    .toStream(os)
+                    .run();
+            log.info("LPVS report saved to: " + filePath);
+        } catch (IOException ex) {
+            log.error("Error during saving PDF report: " + ex.getMessage());
+        }
+    }
+
     /**
      * Generates a comment to the pull request for publication to the VCS.
      *
@@ -508,12 +533,14 @@ private void addBlockOfTableForLicenseTypeMD(
      */
     private String generateLicenseConflictsTableHTML(List<LPVSConflict<String, String>> conflicts) {
         StringBuilder htmlBuilder = new StringBuilder();
-        htmlBuilder.append("<table>");
+        htmlBuilder.append("<table>").append("<thead>");
         htmlBuilder
                 .append("<tr>")
                 .append("<th>Conflict</th>")
                 .append("<th>Explanation</th>")
-                .append("<tr>");
+                .append("</tr>")
+                .append("</thead>")
+                .append("<tbody>");
 
         for (LPVSConflict<String, String> conflict : conflicts) {
             htmlBuilder
@@ -528,7 +555,7 @@ private String generateLicenseConflictsTableHTML(List<LPVSConflict<String, Strin
                     .append("</td>")
                     .append("</tr>");
         }
-        htmlBuilder.append("</table>");
+        htmlBuilder.append("</tbody>").append("</table>");
         return htmlBuilder.toString();
     }
 
@@ -559,8 +586,9 @@ private String getExplanationForLicenseConflict(String lic1, String lic2) {
     private String generateLicenseTableHTML(
             Map<String, GroupInfo<?>> detectedLicenseInfo, LPVSQueue webhookConfig, LPVSVcs vcs) {
         StringBuilder htmlBuilder = new StringBuilder();
-        htmlBuilder.append("<table>");
         htmlBuilder
+                .append("<table>")
+                .append("<thead>")
                 .append("<tr>")
                 .append("<th>License Type / Explanation</th>")
                 .append("<th>License SPDX ID</th>")
@@ -570,7 +598,10 @@ private String generateLicenseTableHTML(
                 .append("<th>Component File Path</th>")
                 .append("<th>Matched Lines</th>")
                 .append("<th>Match Value</th>")
-                .append("<tr>");
+                .append("</tr>")
+                .append("</thead>")
+                .append("<tbody>");
+
         // Prohibited licenses
         addBlockOfTableForLicenseTypeHTML(
                 htmlBuilder, detectedLicenseInfo, prohibited, webhookConfig, vcs);
@@ -584,7 +615,7 @@ private String generateLicenseTableHTML(
         addBlockOfTableForLicenseTypeHTML(
                 htmlBuilder, detectedLicenseInfo, permitted, webhookConfig, vcs);
 
-        htmlBuilder.append("</table>");
+        htmlBuilder.append("</tbody>").append("</table>");
         return htmlBuilder.toString();
     }
 

src/main/java/com/lpvs/service/scan/LPVSDetectService.java

@@ -33,6 +33,7 @@
 
 import lombok.extern.slf4j.Slf4j;
 
+import static com.lpvs.entity.report.LPVSReportBuilder.generatePdfFromHtml;
 import static com.lpvs.entity.report.LPVSReportBuilder.saveHTMLToFile;
 
 /**
@@ -85,6 +86,12 @@ public class LPVSDetectService {
     @Value("${build.html.report:}")
     private String htmlReport;
 
+    /**
+     * Optional parameter to save pdf report to specified location.
+     */
+    @Value("${build.pdf.report:}")
+    private String pdfReport;
+
     /**
      * Spring application context.
      */
@@ -192,20 +199,19 @@ public void runSingleScan() {
 
         // Report generation
         // 1. HTML format
-        if (generateReport && !StringUtils.isBlank(htmlReport)) {
-            File report = new File(HtmlUtils.htmlEscape(htmlReport));
-            String folderPath = report.getParent();
-            if (folderPath == null) {
-                folderPath = ".";
+        if (generateReport
+                && (!StringUtils.isBlank(htmlReport) || !StringUtils.isBlank(pdfReport))) {
+            String reportContent =
+                    reportBuilder.generateHtmlReportSingleScan(
+                            path, scanResult, detectedConflicts, null, null);
+            if (!StringUtils.isBlank(htmlReport) && checkFolderForReport(htmlReport)) {
+                saveHTMLToFile(
+                        reportContent,
+                        new File(HtmlUtils.htmlEscape(htmlReport)).getAbsolutePath());
             }
-            File folder = new File(folderPath);
-            if (folder.exists() && folder.isDirectory()) {
-                String reportFile =
-                        reportBuilder.generateHtmlReportSingleScan(
-                                path, scanResult, detectedConflicts, null, null);
-                saveHTMLToFile(reportFile, report.getAbsolutePath());
-            } else {
-                log.error("Error: The parent directory '" + folder.getPath() + "' does not exist.");
+            if (!StringUtils.isBlank(pdfReport) && checkFolderForReport(pdfReport)) {
+                generatePdfFromHtml(
+                        reportContent, new File(HtmlUtils.htmlEscape(pdfReport)).getAbsolutePath());
             }
             SpringApplication.exit(ctx, () -> 0);
         } else if (generateReport) {
@@ -219,6 +225,25 @@ public void runSingleScan() {
         }
     }
 
+    /**
+     * Checks if the folder exists where the report will be saved.
+     * @param reportPath the path to the report file
+     * @return {@code true} if the folder exists and is a directory, otherwise {@code false}
+     */
+    private boolean checkFolderForReport(String reportPath) {
+        File report = new File(HtmlUtils.htmlEscape(reportPath));
+        String folderPath = report.getParent();
+        if (folderPath == null) {
+            folderPath = ".";
+        }
+        File folder = new File(folderPath);
+        if (folder.exists() && folder.isDirectory()) {
+            return true;
+        }
+        log.error("Error: The parent directory '" + folder.getPath() + "' does not exist.");
+        return false;
+    }
+
     /**
      * Creates a new LPVSQueue object with default values for a local scan.
      *

src/main/resources/templates/report_single_scan.html

@@ -1,9 +1,9 @@
 <!DOCTYPE html>
 <html xmlns:th="http://www.thymeleaf.org">
 <head>
-    <meta charset="UTF-8" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
+    <meta charset="UTF-8" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css" />
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
 
     <title th:text="${title}">title</title>
 
@@ -55,15 +55,23 @@
             transition: max-height 0.2s ease-out;
         }
         table {
-            border-collapse: separate;
+            border-collapse: collapse;
             width: 100%;
             padding: 20px;
+            table-layout: fixed;
         }
         table td, table th {
             padding: 8px;
             text-align: left;
             border: 1px solid black;
             width: auto;
+            word-wrap: break-words;
+        }
+        table thead {
+            display: table-header-group;
+        }
+        table tbody {
+            display: table-row-group;
         }
         .mt-30 {
             margin-top: 30px;
@@ -87,7 +95,7 @@ <h1><b>Report</b> - <b>L</b>icense <b>P</b>re-<b>V</b>alidation <b>S</b>ervice (
     <b>Used scanner:</b> <span th:text=${usedScanner}>usedScanner</span><br/>
     <b>Version of LPVS:</b> <span th:text=${lpvsVersion}>lpvsVersion</span><br/>
 </div>
-<hr>
+<hr />
 <h3 class="ml-30">Detected Licenses</h3>
 <div class="items" th:if="${licenseDetected} > 0">
     <b>Potential license issues detected:</b> <span th:text=${licenseDetected}>licenseDetected</span>
@@ -107,7 +115,7 @@ <h3 class="ml-30">Detected Licenses</h3>
         <p th:utext=${licenseTable}></p>
     </div>
 </div>
-<hr>
+<hr />
 <h3 class="ml-30">Detected License Conflicts</h3>
 <div class="items" th:if="${licenseConflicts} > 0">
     <b>Potential license conflict(s) detected:</b> <span th:text=${licenseConflicts}>licenseConflicts</span>

src/test/java/com/lpvs/entity/report/LPVSReportBuilderTest.java

@@ -30,6 +30,7 @@
 import java.text.SimpleDateFormat;
 import java.util.*;
 
+import static com.lpvs.entity.report.LPVSReportBuilder.generatePdfFromHtml;
 import static com.lpvs.entity.report.LPVSReportBuilder.saveHTMLToFile;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
@@ -297,11 +298,27 @@ void testSaveHTMLToFile() throws IOException {
     }
 
     @Test
-    void saveHTMLToFile_CatchBlock_N() {
+    void testSavePDFToFile() throws IOException {
+        String htmlContent = "<html><body><p class=\"panel\">Test HTML</p></body></html>";
+        String filePath = "test-output.pdf";
+
+        generatePdfFromHtml(htmlContent, filePath);
+
+        Path path = Paths.get(filePath);
+        assertTrue(Files.exists(path));
+
+        // Clean up: delete the created file
+        Files.deleteIfExists(path);
+    }
+
+    @Test
+    void saveHTMLandPDFtoFile_CatchBlock_N() {
         String htmlContent = "<html><body></body></html>";
         Path invalidPath = tempDir.resolve("invalid/path/with/special/characters");
         saveHTMLToFile(htmlContent, invalidPath.toString());
         assertFalse(Files.exists(invalidPath));
+        generatePdfFromHtml(htmlContent, invalidPath.toString());
+        assertFalse(Files.exists(invalidPath));
     }
 
     private LPVSFile createSampleFile(