view.html.php file for Joomla component: My Pictures v1.0.1

<?php
/**
 * @version             $Id: view.html.php 74 2013-02-05 15:00:00Z sbebbers $
 * @package             My Pictures v1.0.1
 * @subpackage          Components
 * @copyright           Copyright (C) 2013 Metapps Ltd
 * @author              Shaun Bebbington
 * @link                http://www.metaps.co.uk
 * @license             License GNU General Public License version 2 or later
 *                      Use at your own risk - no warranty implied or given
 * @note                I wanted a quick and dirty solution to test the logic,
 *          so I put the file-handling stuff here. Might not be the
 *          best idea ever, but it works for now. Will separate the
 *          logic further when I get some time.
 */
defined('_JEXEC') or die('You do not have the correct permissions to view this page.');
jimport('joomla.application.component.view');
class AnotherOneViewAnotherOne extends JView {
    // This will take the image data from the session data:
    public $imgData = array('user' => '',
                'exts' => '',
                'fileName' => '',
                );
    // Used for making directories (default is set in default.php):
    public $dir = '';
    public function display( $tpl = null ) {
        // Gets user data:
        $tempUser = array();
        // Get user details into array buffer
        $tempUser = JFactory::getUser();
        // We only need the username:
        $this->imgData['user'] = $tempUser->username;
        // Now get rid of the user details
        $tempUser = null;
        // Example type and name set (for testing purposes):
        $this->imgData['exts']  = 'jpg';
        $this->imgData['fileName'] = 'test';
        JToolBarHelper::title( 'Another One Administration Page' );
        JToolBarHelper::cancel( 'Anotherone.cancel' );
        parent::display( $tpl );
    }
    public function makeDir( $directory = '' ) {
        // Does some checking to see if the session data is stored correctly:
        if( is_null( $_FILES['file']['name'] ) ) {
            echo '<br />No file chosen<br />';
        }
        if( is_null( $directory ) ) {
            echo '<br />No directory name set - please contact the administrator<br />';
        } else {
            // Sets directory name:
            $this->dir = $directory;
        }
        // Checks if the directory already exsists or not:
        if( file_exists( $this->dir ) ) {
            // Sends file data to the upload function:
            $this->upload( $_FILES );
        } else {
            // So, if not (ie, first-time use), let's make it:
            mkdir( $this->dir, 0777 );
            $this->upload( $_FILES );
        }
    }
    public function upload( $file = array() ) {
        // Checks for the correct file types:
        if(! ( ( $file['file']['type']=='image/png' )   ||
         ( $file['file']['type'] == 'image/jpeg' )  ||
         ( $file['file']['type'] == 'image/pjpeg' ) ||
         ( $file['file']['type'] == 'image/gif' ) ) ) {
            echo '<br />Invalid file type';
        }
        if( ( int ) $file['file']['size'] > 8388608 ) {
            // This is just a test: maximum file size is 8 Megabytes
            echo '<br />File too big</br>';
        } else {
            // Error checknig...
            if( ( int ) $file['file']['error'] > 0) {
                echo '<br />Error code: ' . $file['file']['error'] . '<br />';
            } else {
                // Okay, everything seems good, so we may proceed:
                if( isset( $file['file']['name'] ) ) {
                $this->imgData['fileName'] = explode( '.', $file['file']['name'] );
                } else {
                    // Maybe everything isn't so good; it shouldn't get to this stage though as the above
                    // error checking etc. should be pretty bullet-proof:
                    echo '<br />Hmm... this is embarrassing - my code has not picked up the file name.<br />Please try again.';
                }
                // Temp variable:
                $num = count( $this->imgData->exts )-1;
                $this->imgData->exts = $this->exts[$num];
                // Generates a filename with the current user (admin) and a 10-character randomly generated
                // key:
                $this->imgData['fileName'] =    $this->imgData['user']
                                . $this->generateKey( 6 )
                                . '.'
                                . $this->imgData['exts'];
                // There isn't much chance of this happening, but if there was the same name already in use then we need to
                // stop as it'll over-write the previous file:
                if( file_exists( $this->dir . '/' . $this->imgData['fileName'] ) ) {
                    echo '<br />There seems to be a duplicate file name - which is a rare event<br />'
                        . 'due to the randomly generated key. You should buy a lottery ticket.';
                } else {
                    $destination = $this->dir . '/' .$this->imgData['fileName'];
                    // Okay, so the file doesn't exsist, let's save it:
                    move_uploaded_file( $file['file']['tmp_name'], $destination );
                    echo '<br />File created: <b>' . $destination . '</b><br />';
                }
            }
        }
    }
    // Generates random key for the file names of the pictures, like Facebook does:
    public function generateKey( $noOfChars = 10 ) {
        $random = 'qwertyuiopasdfghjklzxcvbnm0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        return substr( str_shuffle( $random ),0 ,$noOfChars );
    }
    public function __destruct() {
        // Releases resources:
        $this->imgData = null;
        $this->dir = null;
    }
}
?>