Refs #10358 - qpdf, gs, pdfunite might be configured via QFQ config

Makefile

@@ -59,6 +59,7 @@ plantuml:
 bootstrap: .npmpackages .plantuml_install .virtual_env
 	npm update
 	grunt default
+
 	# take care that phpOffice is located under 'qfq/Resources/Private/vendor/phpoffice'
 	# cd extension/Resources/Private; composer update
 	cd extension; composer update

extension/Classes/Core/Constants.php

@@ -644,10 +644,13 @@ const SYSTEM_ENTER_AS_SUBMIT = 'enterAsSubmit';
 const SYSTEM_SHOW_ID_IN_FORM_TITLE = 'showIdInFormTitle';
 
 const SYSTEM_CMD_WKHTMLTOPDF = 'cmdWkhtmltopdf';
-
-// Thumbnail
 const SYSTEM_CMD_INKSCAPE = 'cmdInkscape';
 const SYSTEM_CMD_CONVERT = 'cmdConvert';
+const SYSTEM_CMD_QPDF = 'cmdQpdf';
+const SYSTEM_CMD_GS = 'cmdGs';
+const SYSTEM_CMD_PDFUNITE = 'cmdPdfunite';
+
+// Thumbnail
 const SYSTEM_THUMBNAIL_DIR_SECURE = 'thumbnailDirSecure';
 const SYSTEM_THUMBNAIL_DIR_SECURE_DEFAULT = 'fileadmin/protected/qfqThumbnail';
 const SYSTEM_THUMBNAIL_DIR_PUBLIC = 'thumbnailDirPublic';

extension/Classes/Core/Report/Download.php

@@ -63,6 +63,21 @@ class Download {
      */
     private $downloadDebugLog = '';
 
+    /**
+     * @var string Name of command
+     */
+    private $qpdf = '';
+
+    /**
+     * @var string Name of command
+     */
+    private $gs = '';
+
+    /**
+     * @var string Name of command
+     */
+    private $pdfunite = '';
+
     /**
      * @var string DOWNLOAD_OUTPUT_FORMAT_RAW | DOWNLOAD_OUTPUT_FORMAT_JSON
      */
@@ -83,6 +98,10 @@ class Download {
         $this->db = new Database();
         $this->html2pdf = new Html2Pdf($this->store->getStore(STORE_SYSTEM), $phpUnit);
 
+        $this->qpdf = $this->store->getVar(SYSTEM_CMD_QPDF, STORE_SYSTEM);
+        $this->gs = $this->store->getVar(SYSTEM_CMD_GS, STORE_SYSTEM);
+        $this->pdfunite = $this->store->getVar(SYSTEM_CMD_PDFUNITE, STORE_SYSTEM);
+
         if (Support::findInSet(SYSTEM_SHOW_DEBUG_INFO_DOWNLOAD, $this->store->getVar(SYSTEM_SHOW_DEBUG_INFO, STORE_SYSTEM))) {
             $this->downloadDebugLog = $this->store->getVar(SYSTEM_SQL_LOG, STORE_SYSTEM);
         }
@@ -140,7 +159,7 @@ class Download {
 
 //        $cmd = "pdftk $inputFiles cat output $concatFile 2>&1";  # Outdated. Hard to install on Ubuntu 18. Fails for recent PDFs.
 //        $cmd = "qpdf --empty --pages $inputFiles -- $concatFile 2>&1"; # Fails to merge identical files, if they contain references.
-        $cmd = "pdfunite $inputFiles $concatFile 2>&1"; // Based on poppler. URLs are preserved. Orientation and size are preserved.
+        $cmd = $this->pdfunite . " $inputFiles $concatFile 2>&1"; // Based on poppler. URLs are preserved. Orientation and size are preserved.
 
         if ($this->downloadDebugLog != '') {
             Logger::logMessage("Download: $cmd", $this->downloadDebugLog);
@@ -188,7 +207,7 @@ class Download {
 
             // Possible output: "Unimplemented Feature: Could not merge encrypted files ('ct.18.06.092-097.pdf')"
             $line = implode(',', $rcOutput);
-            if (false !== ($line = strstr($line, "Unimplemented Feature: Could not merge encrypted files ("))) {
+            if (false !== ($line = strstr($line, "Feature not implemented: Could not merge encrypted files ("))) {
 
                 $arr = explode("'", $line, 3);
                 if (!empty($arr[1]) && file_exists($arr[1])) {
@@ -201,13 +220,13 @@ class Download {
                     }
 
                     // Try 1: via 'qpdf --decrypt'
-                    $cmdQpdf = "qpdf --decrypt '$backup' '$file' 2>&1"; // Try to decrypt file
+                    $cmdQpdf = $this->qpdf . " --decrypt '$backup' '$file' 2>&1"; // Try to decrypt file
                     exec($cmdQpdf, $outputQpdf, $rcQpdf);
 
                     if ($rcQpdf != 0) {
 
                         // Try 2: via 'gs -sDEVICE=pdfwrite'
-                        $cmdGs = "gs -sDEVICE=pdfwrite -dNOPAUSE -sOutputFile=\"$file\" -- \"$backup\"";
+                        $cmdGs = $this->gs . " -sDEVICE=pdfwrite -dNOPAUSE -sOutputFile=\"$file\" -- \"$backup\"";
                         exec($cmdGs, $outputGs, $rcGs);
 
                         if ($rcGs != 0) {

extension/Classes/Core/Store/Config.php

@@ -324,8 +324,6 @@ class Config {
             F_BS_INPUT_COLUMNS => 'col-md-6 col-lg-6',
             F_BS_NOTE_COLUMNS => 'col-md-3 col-lg-3',
 
-            SYSTEM_CMD_WKHTMLTOPDF => '/opt/wkhtmltox/bin/wkhtmltopdf',
-
             F_CLASS => 'qfq-notify',
 
             F_CLASS_PILL => 'qfq-color-grey-1',
@@ -373,8 +371,13 @@ class Config {
             SYSTEM_DOCUMENTATION_QFQ => SYSTEM_DOCUMENTATION_QFQ_URL,
             SYSTEM_ENTER_AS_SUBMIT => 1,
 
+            SYSTEM_CMD_WKHTMLTOPDF => '/opt/wkhtmltox/bin/wkhtmltopdf',
             SYSTEM_CMD_INKSCAPE => 'inkscape',
             SYSTEM_CMD_CONVERT => 'convert',
+            SYSTEM_CMD_QPDF => 'qpdf',
+            SYSTEM_CMD_GS => 'gs',
+            SYSTEM_CMD_PDFUNITE => 'pdfunite',
+
             SYSTEM_THUMBNAIL_DIR_SECURE => SYSTEM_THUMBNAIL_DIR_SECURE_DEFAULT,
             SYSTEM_THUMBNAIL_DIR_PUBLIC => SYSTEM_THUMBNAIL_DIR_PUBLIC_DEFAULT,
 

extension/Tests/Unit/Core/Store/StoreTest.php

@@ -410,7 +410,9 @@ class StoreTest extends TestCase {
             SYSTEM_SQL_LOG_MODE_AUTOCRON => 'error',
             F_CLASS => 'qfq-notify',
             SYSTEM_RENDER => SYSTEM_RENDER_SINGLE,
-
+            SYSTEM_CMD_QPDF => 'qpdf',
+            SYSTEM_CMD_GS => 'gs',
+            SYSTEM_CMD_PDFUNITE => 'pdfunite',
         ];
 
         $body = <<< EOT

extension/ext_conf_template.txt

@@ -28,6 +28,15 @@ cmdConvert = convert
 # cat=config/config; type=string; label=Command 'wkhtmltopdf':Default is '/opt/wkhtmltox/bin/wkhtmltopdf'. Command to convert a HTML page to a PDF.
 cmdWkhtmltopdf = /opt/wkhtmltox/bin/wkhtmltopdf
 
+# cat=config/config; type=string; label=Command 'qpdf':Default is 'qpdf'. Will be used to convert PDF to PDF (try to repair) if merging of PDF fails.
+cmdQpdf = qpdf
+
+# cat=config/config; type=string; label=Command 'gs':Default is 'gs'. Will be used to decrypt and to convert PDF to PDF (try to repair) if merging of PDF fails.
+cmdGs = gs
+
+# cat=config/config; type=string; label=Command 'pdfunite':Default is 'pdfunite'. Will be used to merge PDFs.
+cmdPdfunite = pdfunite
+
 # cat=config/email; type=string; label=Options for SendEMail:Default is empty. General options. Check: http://caspian.dotconf.net/menu/Software/SendEmail. E.g.: 'sendEMail=-o tls=yes'
 sendEMailOptions =