// Model

  function editProduct() {
    // Delete current image if box was checked
    if ($this->input->post('deleteimage') && $this->input->post('currentimage')) {
      $this->image->deleteImage('products',$this->input->post('currentimage'));
    }    
    
    // Set our validation rules and custom delimiters (for display) for the form
    $this->validation->set_rules(array('pid'         => 'trim|required',
                                       'cid'         => 'trim|required',    
                                       'name'        => 'trim|required|min_length[5]|max_length[128]',
                                       'description' => 'trim'));
	  
    $this->validation->set_error_delimiters('<li>', '</li>');	  
	  
	  // If form fails validation, reload data for view                                  

    if ($this->validation->run() == FALSE) {

      $pid = (int) $this->input->post('pid');

      ($pid) ? $data['pid'] = $pid : $data['pid'] = (int) $this->uri->segment(3);

      $data['product'] = $this->product->getProduct($data['pid']);


      // Check if product exists and load edit form or bounce to admin home      
      if ($data['product']) {
        // Load category names and cids for select list
        $data['categories'] = $this->category->getallCategory();        
        $this->load->view('editproduct', $data);
      } else {
        $this->session->set_userdata('warningMessage', 'Product does not exist.');      

        redirect('/admin/');
      }

		
    } else {

      // Load data with the information from our form
      $data = array('pid'         => (int) $this->input->post('pid'),
                    'cid'         => $this->input->post('cid'),      

                    'name'        => $this->input->post('name'),

                    'description' => $this->input->post('description'),

                    'image'       => $this->image->addImage('products'));

	     
      // If image upload failed, set back to current image, otherwise, delete old images      
      $data['image'] === false ? $data['image'] = $this->input->post('currentimage') : $this->image->deleteImage('products',$this->input->post('currentimage'));

      // Surpress "no file selected for upload message" for edits
      if (empty($_FILES['userfile']['name']))
        $this->session->set_userdata('warningMessage', '');
        
      // Update product with data, set flash message and return to main admin page      
      $this->product->updateProduct($data['pid'], $data);
      $this->session->set_userdata('statusMessage', 'Product <b>'.$data['name'].'</b> has been updated.');      

      redirect('/admin/listproducts/'.$data['cid']);

    }

  }  




// Model

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>

  <head>

    <title>Administration :: Edit Product: <?= $product->name ?></title>

    <link type="text/css" rel="stylesheet" media="all" href="/assets/css/style.css" />
  </head>

  <body>

  <? $this->load->view('header'); ?>



  <h2>Edit Product: <?= $product->name ?></h2>

  <?= $this->validation->error_string ? '<div id="warningmessage"><b>There were problems updating the product:</b><ul>'.$this->validation->error_string.'</ul></div>' : ''; ?>


  <?= form_open_multipart('/admin/editproduct') ?>
    <fieldset id="productinfo">
      <legend>Product Info</legend>
      <input type="hidden" name="pid" value="<?= $product->pid; ?>" />	
      <input type="hidden" name="currentimage" value="<?= $product->image; ?>" />	
      <label for="Product Name">Product Name:</label>
      <input type="text" name="name" value="<?= isset($this->validation->name) ? $this->validation->name : $product->name ?>" size="50" />
	    <br>
      <label for="Product Category">Product Category:</label>
      <select name="cid">
      <? foreach ($categories->result() as $categoryoption): ?>
        <option value="<?= $categoryoption->cid ?>"<?= $this->validation->set_select('cid', $categoryoption->cid) ?>><?= $categoryoption->name ?></option>
      <? endforeach ?>      
      </select>
      <br>	    
      <label for="Product Description">Product Description:</label>
      <textarea name="description" rows="5" cols="50"><?= isset($this->validation->description) ? $this->validation->description : $product->description ?></textarea>
	  </fieldset>
	  
    <fieldset id="productimage">
      <legend>Product Image</legend>	  	
      <label for="Product Image">Product Image:</label>
      <input type="file" name="userfile" value="<?= isset($this->validation->image) ? $this->validation->image : $product->image ?>" size="35" />
      <? if ($product->image) : ?>
      <br>
      <label for="Delete Image">Delete Image?</label>
      <input type="checkbox" name="deleteimage" value="1" <?= $this->validation->set_checkbox('deleteimage', '1'); ?> /> Check to delete current image. No need to check if uploading a new image.  
      <? endif ?>      
      <p style="text-align: center;"><?= $product->image ? makeThumbnailPopup($product->image, '/assets/images/products/', $product->name) : 'No image is associated with this product.'?></p>	  
	  </fieldset>
    <p><?= form_submit('submit', 'Edit Product') ?></p>
  <?= form_close() ?>

  <? $this->load->view('footer'); ?>


  </body>

</html>