<?php
require_once(LIBDIR."/mvcfronk/mfUpload/mfUpload_TmpFile.php");

class mfUpload {
  private $log;
	private $upload;
	private $size;
	private $savepath;
  private $original_filename;
	private $filename;
  private $dirmode;
  private $filemode;

  
	public function __construct($uplName,$randomFileName=true) {
    $this->log = mfLoghandler::singleton();
    
    $this->dirmode = 0777;
    $this->filemode = 0666;
    
    if(defined("MFUPLOAD_DIRMODE")) {
      $this->dirmode = MFUPLOAD_DIRMODE;
    }
    
    if(defined("MFUPLOAD_FILEMODE")) {
      $this->filemode = MFUPLOAD_FILEMODE;
    }
    
		if(!$this->upload = new mfUpload_TmpFile($uplName)) {
			throw new Exception($this->upload->errormessage);
		}
    
    $this->original_filename = $this->upload->filename;
		
		if(!$this->filename = $this->upload->getFilename()){
			throw new Exception($this->upload->errormessage);
		}
    
    if($randomFileName) {
      $this->filename = $this->getRandomFilename().'-'.$this->filename;
    }
		
		$this->size = $this->upload->getFileSize();
		if($this->size > MFUPLOAD_FILE_MAX_SIZE) {
			throw new Exception('File is too big. Maximum allowed filesize is '.(MFUPLOAD_FILE_MAX_SIZE).' MB');
		}
	}

  static public function handleFormUpload($uplName, $filename = false, $subfolder = false, $savepath = MFUPLOAD_FILE_SAVE_PATH) {
    if(!isset($_FILES) || !array_key_exists($uplName, $_FILES)) {
      throw new Exception("Uploaded file not found");
    }
    if(array_key_exists("error", $_FILES[$uplName]) && $_FILES[$uplName]['error']) {
      throw new Exception("Error receiving file");
    }
    
    $upload_error = false;
    
    $savepath = preg_replace('#/+$#', "", $savepath); // remove trailing slash
    if($subfolder) {
      $subfolder = preg_replace('#^/+#', "", $subfolder); // remove leading slash
      $subfolder = preg_replace('#/+$#', "", $subfolder); // remove trailing slash
      $savepath .= "/$subfolder";
    }
    
    $upload = new mfUpload($uplName);
    $upload->setSavepath($savepath);
    
    if(!$upload->getSize()) {
      throw new Exception("Datei darf nicht leer sein");
    }
    
    if(substr(strtolower($upload->getFilename()), -3, 3) == "pdf" && !$upload->validatePDF()) {
      throw new Exception("PDF-Validierung fehlgeschlagen");
    }
    
    try {
      $upload->save();
    } catch (Exception $ex) {
      throw $ex;
    }
    
    $file_data = [];
    $file_data['name'] = ($filename) ? $filename : $upload->getOriginalFilename();
    $file_data['filename'] = ($filename) ? $filename : $upload->getOriginalFilename();
    $file_data['subfolder'] = $subfolder;
    $file_data['store_filename'] = $upload->getFilename();
    $file_data['orig_filename'] = $upload->getOriginalFilename();

    $file = FileModel::create($file_data);
    $file_id = $file->save();
    if(!$file_id) {
      unlink($upload->getSavepath()."/".$upload->getFilename());
      throw new Exception("Datei konnte nicht angelegt werden");
    }
    
    return $file;
    
  }
  
  public function getSavepath() {
    return $this->savepath;
  }
  
  public function setSavepath($path) {
    $this->savepath = $path;
    return true;
  }
  
  public function getOriginalFilename() {
    return $this->original_filename;
  }
  
  public function getFilename() {
    return $this->filename;
  }
  
  public function setFilename($name) {
    $this->filename = $name;
  }
  
  public function getSize() {
    return $this->size;
  }
  
  public function getDirmode() {
    return $this->dirmode;
  }
  
  public function setDirmode($mode) {
    $this->dirmode = $mode;
  }
  
  public function getFilemode() {
    return $this->filemode;
  }
  
  public function setFilemode($mode) {
    $this->filemode = $mode;
  }
  
  public function getMimetype() {
    return $this->upload->getMimetype();
  }
  
  public function save() {
    if(!$this->savepath) {
      if(!$this->buildSavepath()) {
        throw new Exception ("Not enough data to build savepath!",605);
      }
    }
    if(!$this->upload->move_upload($this->savepath."/".$this->filename)) {
			throw new Exception ("Unable to move temp file: ".$this->upload->errormessage,605);
		}
    
    chmod($this->savepath."/".$this->filename,$this->filemode);
    
    return true;
  }
  
  
	private function buildSavepath() {
		if(!$this->filename) {
			return false;
		}

		$savepath = MFUPLOAD_FILE_SAVE_PATH;
		if(!MFUPLOAD_FILE_SAVE_PATH) {
			$savepath = "upload/";
		}
    
    $this->log->debug("dirmode: ".decoct($this->dirmode));
    if(!file_exists($savepath)) {
      if(!mkdir($savepath, $this->dirmode,true)) {
        throw new Exception("Error creating directory $savepath.");
      }
      chmod($savepath, $this->dirmode);
    }
    if(!is_dir($savepath)) {
      throw new Exception("Upload save path not a directory!");
    }

		$this->savepath = $savepath;
    return true;
	}
	
	public function getRandomFilename() {
		$length = 20;
    $characters = '0123456789abcdef';
    $string = '';    

    for ($p = 0; $p < $length; $p++) {
      $string .= $characters[mt_rand(0, strlen($characters) -1)];
	  }

	  $rand = uniqid(md5(rand()), true);
	  list($rand) = explode('.',$rand);
    
	  $string=$rand.$string;
	  return $string;
	}
  
  public function validatePDF() {
    if(!$this->upload) {
      return false;
    }

    if(!$this->size) {
      return false;
    }
    $this->log->debug("upload size: ".$this->size);
    
    $mime = $this->upload->getMimetype();
    $this->log->debug("upload mime: $mime");
    if(!stripos($mime, "pdf")) {
      return false;
    }
    
    $pdftext = $this->upload->pdftotext();
    
    //$this->log->debug("text: ".$pdftext);
    if($pdftext === false) {
      $this->log->warn("pdftotext returned error (".$this->filename.")");
      return false;
    }
    
    //$this->log->debug("upload text: $pdftext");
    return true;
  }
  
  
}