<?php
class Merge_pdf extends MY_Controller
{
  function __construct()
  {
    parent::__construct();
  }
  function merge()
  {
    $param = $this->sys_input;
    $target = tempnam("/tmp", uniqid("target", true));
    $merge_cmd = "/usr/bin/pdfunite";
    $base_url = "http://localhost/";
    $fnames_del = [];
    $origin = $param["input"];
    $dob = $param["dob"];
    $output_file_name = $param["output"];
    foreach ($origin as $r) {
      $fname = tempnam("/tmp", uniqid("src", true));
      $rpt_data = file_get_contents($r);
      if (strlen($rpt_data) > 0) {
        file_put_contents($fname, $rpt_data);
        $merge_cmd .= " $fname ";
      }
      $fnames_del[] = $fname;
    }
    $merge_cmd .= " $target";
    $output = [];
    exec($merge_cmd, $output);
    if ($dob != "") {
      $target_enc = tempnam("/tmp", uniqid("targetenc", true));
      $enc_cmd = "/usr/bin/pdftk $target output $target_enc user_pw $dob";
      exec($enc_cmd, $output);
    }
    header("Content-type: application/pdf");
    header(
      'Content-Disposition: inline; filename="' .
        $output_file_name .
        '"'
    );
    if ($dob != "") {
      echo file_get_contents($target_enc);
    } else {
      echo file_get_contents($target);
    }
    foreach ($fnames_del as $fdel) {
      unlink($fdel);
    }
    if (file_exists($target)) {
      unlink($target);
    }
    if ($dob != "" && file_exists($target_enc)) {
      unlink($target_enc);
    }
    exit;
  }
}