Initial xentral_oss_20.3.c9ffacf

2021-05-21 08:49:41 +02:00
parent 5406e4a551
commit 34e5ac43d9
18884 changed files with 2109867 additions and 0 deletions
@@ -0,0 +1,103 @@
+<?php
+
+namespace Xentral\Components\Pdf\Merger;
+
+use Xentral\Components\Pdf\Exception\PdfComponentExceptionInterface;
+use Xentral\Components\Pdf\Exception\ShellCommandFailedException;
+
+final class GhostScriptPdfMerger extends AbstractPdfMerger
+{
+    /**
+     * @param array  $sourceFiles
+     * @param string $targetFile
+     *
+     * @throws PdfComponentExceptionInterface
+     *
+     * @return void
+     */
+    public function mergeFiles(array $sourceFiles, $targetFile)
+    {
+        $this->preCheckMergeFiles($sourceFiles, $targetFile);
+        if (!$this->isGhostscriptAvailable()) {
+            throw new ShellCommandFailedException('Ghostscript command "gs" is missing or not callable.');
+        }
+
+        $sourceFilesParam = '';
+        foreach ($sourceFiles as $sourceFile) {
+            $sourceFilesParam .= escapeshellarg($sourceFile) . ' ';
+        }
+
+        $cmdTemplate = 'gs -dQUIET -dNOPAUSE -dBATCH ';
+        $cmdTemplate .= '-dPDFSETTINGS=/prepress '; // High quality, color preserving, 300 dpi images
+        $cmdTemplate .= '-dAutoRotatePages=/None -sDEVICE=pdfwrite -sOUTPUTFILE=%s %s';
+        $cmd = sprintf($cmdTemplate, escapeshellarg($targetFile), $sourceFilesParam);
+
+        $this->executeShellCommand($cmd);
+    }
+
+    /**
+     * @param string $command
+     *
+     * @throws ShellCommandFailedException
+     *
+     * @return array|string[] Zeilenweise Ausgabe des Commands
+     */
+    private function executeShellCommand($command)
+    {
+        if ($this->isFunctionDisabled('exec')) {
+            throw new ShellCommandFailedException('PHP function "exec" is disabled by php.ini settings.');
+        }
+
+        $output = [];
+        @exec($command, $output, $returnVar);
+
+        switch ($returnVar) {
+            case 0:
+                // Kein Fehler
+                break;
+            case 1:
+                throw new ShellCommandFailedException('General error: ' . implode(' ', $output));
+                break;
+            case 126:
+                throw new ShellCommandFailedException('Can not execute "gs" command.');
+                break;
+            case 127:
+                throw new ShellCommandFailedException('Command "gs" not found.');
+                break;
+        }
+
+        return $output;
+    }
+
+    /**
+     * @return bool
+     */
+    private function isGhostscriptAvailable()
+    {
+        if ($this->isFunctionDisabled('shell_exec')) {
+            throw new ShellCommandFailedException('PHP function "shell_exec" is disabled by php.ini settings.');
+        }
+
+        $result = @shell_exec('gs');
+
+        return !empty($result);
+    }
+
+    /**
+     * @param string $functionName PHP function name
+     *
+     * @return bool
+     */
+    public function isFunctionDisabled($functionName)
+    {
+        $functionName = trim($functionName);
+        $disabledFunctions = explode(',', ini_get('disable_functions'));
+        foreach ($disabledFunctions as $disabledFunction) {
+            if (trim($disabledFunction) === $functionName) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}