<?php
// /app/controllers/components/getid3.php
class Getid3Component extends Object
{
  public $errors = array();

  function __construct()
  {
    set_time_limit(20*3600);
    ignore_user_abort(false);
  }

  function error($text)
  {
    array_push($this->errors, $text);
  }

  function extract($filename)
  {

    App::import('vendor','getid3/getid3',array('file'=>'getid3.php'));
    // Initialize getID3 engine
    $getID3 = new getID3;
    $getID3->setOption(array('encoding' => Configure::read('App.encoding')));

    // Analyze file and store returned data in $ThisFileInfo
    $ThisFileInfo = $getID3->analyze($filename);

    return $ThisFileInfo;
  }

  function read($filename) { return $this->extract($filename); }

  function getId3Clean($filename)
  {
    $info = $this->read($filename);

    $id3 = array();
    foreach ($info['tags'] as $tag) {
      foreach ($tag as $key => $val) {
        if (empty($id3[$key])) {
          $id3[$key] = $val[0];
        }
        else {
          if (strlen($val[0]) > strlen($id3[$key])) {
            $id3[$key] = $val[0];
          }
        }
      }
    }
    return $id3;
  }

  function getCustomTags($filename)
  {
    $id3 = $this->getId3Clean($filename);
    $vars = array(
      'description' => 'content_group_description',
      'set'         => 'part_of_a_set'
    );
    foreach ($vars as $k => $v) {
      if (!empty($id3[$v])) {
        $id3[$k] = $id3[$v];
        unset($id3[$v]);
      }
    }
    return $id3;
  }

  function write($filename, $data)
  {
    App::import('vendor', 'getid3/getid3/getid3');

    // Initialize getID3 engine
    $getID3 = new getID3;
    $getID3->setOption(array('encoding' => Configure::read('App.encoding')));

    App::import('vendor','getid3/getid3', array('file' => 'write.php'));

    // Initialize getID3 tag-writing module
    $tagwriter = new getid3_writetags;

    //$tagwriter->filename       = '/path/to/file.mp3';
    $tagwriter->filename   = $filename;
    $tagwriter->tagformats = array('id3v1', 'id3v2.3');

    // set various options (optional)
    $tagwriter->overwrite_tags    = true;
    $tagwriter->tag_encoding      = Configure::read('App.encoding');
    $tagwriter->remove_other_tags = true;

    // populate data array
    $TagData['title'][]   = !empty($data['title'])?$data['title']:null;
    $TagData['artist'][]  = !empty($data['artist'])?$data['artist']:null;
    $TagData['album'][]   = !empty($data['album'])?$data['album']:null;;
    $TagData['year'][]    = !empty($data['year'])?$data['year']:null;;
    $TagData['genre'][]   = !empty($data['genre'])?$data['genre']:null;;
    $TagData['comment'][] = 'from www.underave.net';
    $TagData['track'][]   = !empty($data['track'])?$data['track']:null;;

    $tagwriter->tag_data = $TagData;

    // write tags
    if ($tagwriter->WriteTags()) {
      if (!empty($tagwriter->warnings)) {
        return $tagwriter->warnings;
      }
      return true;
    } else {
      return $tagwriter->errors;
    }
  }

  function joinMp3($file_out, $files_in)
  {
    foreach ($files_in as $nextinputfilename) {
      if (!is_readable($nextinputfilename)) {
        $this->error('Cannot read "' . $nextinputfilename . '"');
      }
    }
    if (!empty($this->errors)) return false;

    if (!is_writeable(dirname($file_out))) {
      $this->error('Cannot write "' . $file_out . '"');
      return false;
    }

    App::import('vendor', 'getid3/getid3', array('file' => 'getid3.php'));
    if ($fp_output = @fopen($file_out, 'wb')) {
      // Initialize getID3 engine
      $getID3 = new getID3;
      foreach ($files_in as $nextinputfilename) {
        $current_file_info = $getID3->analyze($nextinputfilename);
        if ($current_file_info['fileformat'] == 'mp3') {
          if ($fp_source = @fopen($nextinputfilename, 'rb')) {
            $current_output_position = ftell($fp_output);

            // copy audio data from first file
            fseek($fp_source, $current_file_info['avdataoffset'], SEEK_SET);
            while (!feof($fp_source) &amp;&amp; (ftell($fp_source) < $current_file_info['avdataend'])) {
              fwrite($fp_output, fread($fp_source, 32768));
            }

            fclose($fp_source);
            // trim post-audio data (if any) copied from first file that we don't need or want
            $end_offset = $current_output_position + ($current_file_info['avdataend'] - $current_file_info['avdataoffset']);
            fseek($fp_output, $end_offset, SEEK_SET);
            ftruncate($fp_output, $end_offset);
          } else {
            $this->error('failed to open ''.$nextinputfilename.'' for reading');
            fclose($fp_output);
            return false;
          }
        } else {
          $this->error('''.$nextinputfilename.'' is not MP3 format');
          fclose($fp_output);
          return false;
        }
      }
    } else {
      $this->error('failed to open ''.$file_out.'' for writing');
      return false;
    }
    fclose($fp_output);
    return true;
  }
}

class FooController extends AppController {
  $components = array('Getid3');
}

$destino = WWW_ROOT . 'files' . DS . 'podcasts' . DS . 'fichero_destino.mp3';
$mp3 = array(
  WWW_ROOT . 'files' . DS . 'mp3' . DS . 'fichero1.mp3',
  WWW_ROOT . 'files' . DS . 'mp3' . DS . 'fichero2.mp3',
  WWW_ROOT . 'files' . DS . 'mp3' . DS . 'fichero3.mp3',
  WWW_ROOT . 'files' . DS . 'mp3' . DS . 'fichero4.mp3',
  WWW_ROOT . 'files' . DS . 'mp3' . DS . 'fichero5.mp3'
);
if ($this->Getid3->joinMp3($destino, $mp3)) {
  // fichero creado correctamente
} else {
  pr($this->Getid3->errors);
}

var $components = array('DebugKit.Toolbar');