protected function runOcr()
{
try {
$pages = $this->pdf->getPages();
} catch (\Exception $e) {
static::raiseError(get_class($this->pdf) . '::getPages() returned false!', false, $e);
return false;
}
if (empty($pages)) {
return true;
}
try {
$storage = new \Mtlda\Controllers\StorageController();
} catch (\Exception $e) {
static::raiseError(__METHOD__ . '(), failed to load StorageController!', false, $e);
return false;
}
if (!($tempDir = $storage->createTempDir('ocr_'))) {
static::raiseError(get_class($storage) . '::createTempDir() returned false!');
return false;
}
if (!file_exists($tempDir) || !is_dir($tempDir)) {
static::raiseError(get_class($storage) . '::createTempDir() has not returned a valid directory!');
return false;
}
foreach ($pages as $id => $page) {
try {
$objects = $page->getXObjects();
} catch (\Exception $e) {
$this->unlinkDirectory($tempDir);
static::raiseError(get_class($page) . '::getXObjects() returned false!', false, $e);
return false;
}
foreach ($objects as $id => $object) {
if (!is_a($object, 'Smalot\\PdfParser\\XObject\\Image')) {
continue;
}
try {
$content = $object->getContent();
} catch (\Exception $e) {
$this->unlinkDirectory($tempDir);
static::raiseError(get_class($object) . '::getContent() returned false!', false, $e);
return false;
}
if (!($tempFile = tempnam($tempDir, 'pdfcontent_'))) {
$this->unlinkDirectory($tempDir);
static::raiseError(__METHOD__ . '(), tempnam() returned false!');
return false;
}
if (!file_put_contents($tempFile, $content)) {
$this->unlinkDirectory($tempDir);
static::raiseError(__METHOD__ . '(), file_put_contents() returned false!');
return false;
}
}
}
if (($text = $this->ocr->scanDirectory($tempDir)) === false) {
static::raiseError(get_class($this->ocr) . '::scanDirectory() returned false!');
return false;
}
if (!$this->unlinkDirectory($tempDir)) {
static::raiseError(__CLASS__ . '::unlinkDirectory() returned false!');
return false;
}
if (!isset($text) || empty($text) || !is_array($text)) {
return array();
}
return $text;
}
