make pdtToText work

src/PopplerPhp/PdfToText.php

@@ -9,30 +9,73 @@
 
 namespace NcJoes\PopplerPhp;
 
+use NcJoes\PopplerPhp\Constants as C;
+
 class PdfToText extends PopplerUtil
 {
+     /**
+     * PdfToCairo constructor.
+     *
+     * @param string $pdfFile
+     * @param array $options
+     */
+    public function __construct($pdfFile = '', array $options = [])
+    {
+        $this->bin_file = C::PDF_TO_TEXT;
+
+        return parent::__construct($pdfFile, $options);
+    }
+
     public function utilOptions()
     {
-        // TODO: Implement utilOptions() method.
+         return $this->pageRangeOptions();
     }
 
     public function utilOptionRules()
     {
-        // TODO: Implement utilOptionRules() method.
+        return [];
     }
 
     public function utilFlags()
     {
-        // TODO: Implement utilFlags() method.
+        return [];
     }
 
     public function utilFlagRules()
     {
-        // TODO: Implement utilFlagRules() method.
+        return [];
     }
 
     public function outputExtension()
     {
         return '.txt';
     }
-}
+
+       /**
+     * @return string
+     */
+    public function generate()
+    {
+        $this->output_file_extension = $this->outputExtension();
+
+        return $this->shellExec();
+    }
+
+    public function startFromPage($page)
+    {
+        return $this->setOption(C::_F, $page);
+    }
+
+    public function stopAtPage($page)
+    {
+        return $this->setOption(C::_L, $page);
+    }
+
+    protected function pageRangeOptions()
+    {
+        return [
+            C::_F => C::T_INTEGER,
+            C::_L => C::T_INTEGER,
+        ];
+    }
+}