PDFA fixes (#2896)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

Dockerfile

@@ -56,13 +56,15 @@ RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/main" | tee -a /et
         openssl-dev \
         openjdk21-jre \
 # Doc conversion
+		gcompat \
+    	libc6-compat \
         libreoffice \
 # pdftohtml
         poppler-utils \
 # OCR MY PDF (unpaper for descew and other advanced features)
         tesseract-ocr-data-eng \
 # CV
-        py3-opencv \
+		py3-opencv \
 # python3/pip
         python3 \
         py3-pip && \

Dockerfile.fat

@@ -57,6 +57,8 @@ RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/main" | tee -a /et
         openssl-dev \
         openjdk21-jre \
 # Doc conversion
+		gcompat \
+    	libc6-compat \
         libreoffice \
 # pdftohtml
         poppler-utils \
@@ -65,7 +67,7 @@ RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/main" | tee -a /et
         tesseract-ocr-data-eng \
         font-terminus font-dejavu font-noto font-noto-cjk font-awesome font-noto-extra \
 # CV
-        py3-opencv \
+		py3-opencv \
 # python3/pip
         python3 \
     py3-pip && \

src/main/java/stirling/software/SPDF/config/EndpointConfiguration.java

@@ -265,9 +265,6 @@ public class EndpointConfiguration {
         // Pdftohtml dependent endpoints
         addEndpointToGroup("Pdftohtml", "pdf-to-html");
         addEndpointToGroup("Pdftohtml", "pdf-to-markdown");
-
-        // disabled for now while we resolve issues
-        disableEndpoint("pdf-to-pdfa");
     }
 
     private void processEnvironmentConfigs() {

src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToPDFA.java

@@ -73,8 +73,8 @@ public class ConvertPDFToPDFA {
             // Determine PDF/A filter based on requested format
             String pdfFilter =
                     "pdfa".equals(outputFormat)
-                            ? "writer_pdf_Export:{'SelectPdfVersion':{'Value':'2'}}:writer_pdf_Export"
+                            ? "pdf:writer_pdf_Export:{\"SelectPdfVersion\":{\"type\":\"long\",\"value\":\"2\"}}"
-                            : "writer_pdf_Export:{'SelectPdfVersion':{'Value':'1'}}:writer_pdf_Export";
+                            : "pdf:writer_pdf_Export:{\"SelectPdfVersion\":{\"type\":\"long\",\"value\":\"1\"}}";
 
             // Prepare LibreOffice command
             List<String> command =
@@ -84,7 +84,7 @@ public class ConvertPDFToPDFA {
                                     "--headless",
                                     "--nologo",
                                     "--convert-to",
-                                    "pdf:" + pdfFilter,
+                                    pdfFilter,
                                     "--outdir",
                                     tempOutputDir.toString(),
                                     tempInputFile.toString()));

src/main/resources/messages_en_GB.properties

@@ -1185,7 +1185,7 @@ changeMetadata.submit=Change
 #pdfToPDFA
 pdfToPDFA.title=PDF To PDF/A
 pdfToPDFA.header=PDF To PDF/A
-pdfToPDFA.credit=This service uses qpdf for PDF/A conversion
+pdfToPDFA.credit=This service uses libreoffice for PDF/A conversion
 pdfToPDFA.submit=Convert
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_en_US.properties

@@ -1185,7 +1185,7 @@ changeMetadata.submit=Change
 #pdfToPDFA
 pdfToPDFA.title=PDF To PDF/A
 pdfToPDFA.header=PDF To PDF/A
-pdfToPDFA.credit=This service uses qpdf for PDF/A conversion
+pdfToPDFA.credit=This service uses libreoffice for PDF/A conversion
 pdfToPDFA.submit=Convert
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format