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   1  <?php
   2  
   3  /**
   4   * @package    Joomla.Installation
   5   *
   6   * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
   7   * @license    GNU General Public License version 2 or later; see LICENSE.txt
   8   */
   9  
  10  namespace Joomla\CMS\Installation\Form\Field\Installation;
  11  
  12  use Joomla\CMS\Factory;
  13  use Joomla\CMS\Form\FormField;
  14  
  15  // phpcs:disable PSR1.Files.SideEffects
  16  \defined('_JEXEC') or die;
  17  // phpcs:enable PSR1.Files.SideEffects
  18  
  19  /**
  20   * Database Prefix field.
  21   *
  22   * @since  1.6
  23   */
  24  class PrefixField extends FormField
  25  {
  26      /**
  27       * The form field type.
  28       *
  29       * @var    string
  30       * @since  1.6
  31       */
  32      protected $type = 'Prefix';
  33  
  34      /**
  35       * Method to get the field input markup.
  36       *
  37       * @return  string   The field input markup.
  38       *
  39       * @since   1.6
  40       */
  41      protected function getInput()
  42      {
  43          // Initialize some field attributes.
  44          $size      = $this->element['size'] ? abs((int) $this->element['size']) : 5;
  45          $maxLength = $this->element['maxlength'] ? ' maxlength="' . (int) $this->element['maxlength'] . '"' : '';
  46          $class     = $this->element['class'] ? ' class="' . (string) $this->element['class'] . '"' : '';
  47          $readonly  = (string) $this->element['readonly'] === 'true' ? ' readonly="readonly"' : '';
  48          $disabled  = (string) $this->element['disabled'] === 'true' ? ' disabled="disabled"' : '';
  49  
  50          // Make sure somebody doesn't put in a too large prefix size value.
  51          if ($size > 10) {
  52              $size = 10;
  53          }
  54  
  55          // If a prefix is already set, use it instead.
  56          $session = Factory::getSession()->get('setup.options', array());
  57  
  58          if (empty($session['db_prefix'])) {
  59              // Create the random prefix.
  60              $prefix  = '';
  61              $chars   = range('a', 'z');
  62              $numbers = range(0, 9);
  63  
  64              // We want the fist character to be a random letter.
  65              shuffle($chars);
  66              $prefix .= $chars[0];
  67  
  68              // Next we combine the numbers and characters to get the other characters.
  69              $symbols = array_merge($numbers, $chars);
  70              shuffle($symbols);
  71  
  72              for ($i = 0, $j = $size - 1; $i < $j; ++$i) {
  73                  $prefix .= $symbols[$i];
  74              }
  75  
  76              // Add in the underscore.
  77              $prefix .= '_';
  78          } else {
  79              $prefix = $session['db_prefix'];
  80          }
  81  
  82          // Initialize JavaScript field attributes.
  83          $onchange = $this->element['onchange'] ? ' onchange="' . (string) $this->element['onchange'] . '"' : '';
  84  
  85          return '<input type="text" name="' . $this->name . '" id="' . $this->id . '"' .
  86                  ' value="' . htmlspecialchars($prefix, ENT_COMPAT, 'UTF-8') . '"' .
  87                  $class . $disabled . $readonly . $onchange . $maxLength . '>';
  88      }
  89  }