/application/libraries/joomla/form/fields/rules.php

<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die();

jimport('joomla.html.html');
jimport('joomla.access.access');
jimport('joomla.form.formfield');

/**
 * Form Field class for the Joomla Platform.
 * Field for assigning permissions to groups for a given asset
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @see         JAccess
 * @since       11.1
 */
class JFormFieldRules extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	public $type = 'Rules';

	/**
	 * Method to get the field input markup for Access Control Lists.
	 * Optionally can be associated with a specific component and section.
	 *
	 * TODO: Add access check.
	 *
	 * @return  string  The field input markup.
	 *
	 * @since   11.1
	 */
	protected function getInput()
	{
		JHtml::_('behavior.tooltip');

		// Initialise some field attributes.
		$section = $this->element['section'] ? (string) $this->element['section'] : '';
		$component = $this->element['component'] ? (string) $this->element['component'] : '';
		$assetField = $this->element['asset_field'] ? (string) $this->element['asset_field'] : 'asset_id';

		// Get the actions for the asset.
		$actions = JAccess::getActions($component, $section);

		// Iterate over the children and add to the actions.
		foreach ($this->element->children() as $el)
		{
			if ($el->getName() == 'action')
			{
				$actions[] = (object) array('name' => (string) $el['name'], 'title' => (string) $el['title'],
					'description' => (string) $el['description']);
			}
		}

		// Get the explicit rules for this asset.
		if ($section == 'component')
		{
			// Need to find the asset id by the name of the component.
			$db = JFactory::getDbo();
			$db->setQuery('SELECT id FROM #__assets WHERE name = ' . $db->quote($component));
			$assetId = (int) $db->loadResult();

			if ($error = $db->getErrorMsg())
			{
				JError::raiseNotice(500, $error);
			}
		}
		else
		{
			// Find the asset id of the content.
			// Note that for global configuration, com_config injects asset_id = 1 into the form.
			$assetId = $this->form->getValue($assetField);
		}

		// Use the compact form for the content rules (deprecated).
		//if (!empty($component) && $section != 'component') {
		//	return JHtml::_('rules.assetFormWidget', $actions, $assetId, $assetId ? null : $component, $this->name, $this->id);
		//}

		// Full width format.

		// Get the rules for just this asset (non-recursive).
		$assetRules = JAccess::getAssetRules($assetId);

		// Get the available user groups.
		$groups = $this->getUserGroups();

		// Build the form control.
		$curLevel = 0;

		// Prepare output
		$html = array();
		$html[] = '<div id="permissions-sliders" class="pane-sliders">';
		$html[] = '<p class="rule-desc">' . JText::_('JLIB_RULES_SETTINGS_DESC') . '</p>';
		$html[] = '<ul id="rules">';

		// Start a row for each user group.
		foreach ($groups as $group)
		{
			$difLevel = $group->level - $curLevel;

			if ($difLevel > 0)
			{
				$html[] = '<li><ul>';
			}
			else if ($difLevel < 0)
			{
				$html[] = str_repeat('</ul></li>', -$difLevel);
			}

			$html[] = '<li>';

			$html[] = '<div class="panel">';
			$html[] = '<h3 class="pane-toggler title"><a href="javascript:void(0);"><span>';
			$html[] = str_repeat('<span class="level">|&ndash;</span> ', $curLevel = $group->level) . $group->text;
			$html[] = '</span></a></h3>';
			$html[] = '<div class="pane-slider content pane-hide">';
			$html[] = '<div class="mypanel">';
			$html[] = '<table class="group-rules">';
			$html[] = '<thead>';
			$html[] = '<tr>';

			$html[] = '<th class="actions" id="actions-th' . $group->value . '">';
			$html[] = '<span class="acl-action">' . JText::_('JLIB_RULES_ACTION') . '</span>';
			$html[] = '</th>';

			$html[] = '<th class="settings" id="settings-th' . $group->value . '">';
			$html[] = '<span class="acl-action">' . JText::_('JLIB_RULES_SELECT_SETTING') . '</span>';
			$html[] = '</th>';

			// The calculated setting is not shown for the root group of global configuration.
			$canCalculateSettings = ($group->parent_id || !empty($component));
			if ($canCalculateSettings)
			{
				$html[] = '<th id="aclactionth' . $group->value . '">';
				$html[] = '<span class="acl-action">' . JText::_('JLIB_RULES_CALCULATED_SETTING') . '</span>';
				$html[] = '</th>';
			}

			$html[] = '</tr>';
			$html[] = '</thead>';
			$html[] = '<tbody>';

			foreach ($actions as $action)
			{
				$html[] = '<tr>';
				$html[] = '<td headers="actions-th' . $group->value . '">';
				$html[] = '<label class="hasTip" for="' . $this->id . '_' . $action->name . '_' . $group->value . '" title="'
					. htmlspecialchars(JText::_($action->title) . '::' . JText::_($action->description), ENT_COMPAT, 'UTF-8') . '">';
				$html[] = JText::_($action->title);
				$html[] = '</label>';
				$html[] = '</td>';

				$html[] = '<td headers="settings-th' . $group->value . '">';

				$html[] = '<select name="' . $this->name . '[' . $action->name . '][' . $group->value . ']" id="' . $this->id . '_' . $action->name
					. '_' . $group->value . '" title="'
					. JText::sprintf('JLIB_RULES_SELECT_ALLOW_DENY_GROUP', JText::_($action->title), trim($group->text)) . '">';

				$inheritedRule = JAccess::checkGroup($group->value, $action->name, $assetId);

				// Get the actual setting for the action for this group.
				$assetRule = $assetRules->allow($action->name, $group->value);

				// Build the dropdowns for the permissions sliders

				// The parent group has "Not Set", all children can rightly "Inherit" from that.
				$html[] = '<option value=""' . ($assetRule === null ? ' selected="selected"' : '') . '>'
					. JText::_(empty($group->parent_id) && empty($component) ? 'JLIB_RULES_NOT_SET' : 'JLIB_RULES_INHERITED') . '</option>';
				$html[] = '<option value="1"' . ($assetRule === true ? ' selected="selected"' : '') . '>' . JText::_('JLIB_RULES_ALLOWED')
					. '</option>';
				$html[] = '<option value="0"' . ($assetRule === false ? ' selected="selected"' : '') . '>' . JText::_('JLIB_RULES_DENIED')
					. '</option>';

				$html[] = '</select>&#160; ';

				// If this asset's rule is allowed, but the inherited rule is deny, we have a conflict.
				if (($assetRule === true) && ($inheritedRule === false))
				{
					$html[] = JText::_('JLIB_RULES_CONFLICT');
				}

				$html[] = '</td>';

				// Build the Calculated Settings column.
				// The inherited settings column is not displayed for the root group in global configuration.
				if ($canCalculateSettings)
				{
					$html[] = '<td headers="aclactionth' . $group->value . '">';

					// This is where we show the current effective settings considering currrent group, path and cascade.
					// Check whether this is a component or global. Change the text slightly.

					if (JAccess::checkGroup($group->value, 'core.admin') !== true)
					{
						if ($inheritedRule === null)
						{
							$html[] = '<span class="icon-16-unset">' . JText::_('JLIB_RULES_NOT_ALLOWED') . '</span>';
						}
						else if ($inheritedRule === true)
						{
							$html[] = '<span class="icon-16-allowed">' . JText::_('JLIB_RULES_ALLOWED') . '</span>';
						}
						else if ($inheritedRule === false)
						{
							if ($assetRule === false)
							{
								$html[] = '<span class="icon-16-denied">' . JText::_('JLIB_RULES_NOT_ALLOWED') . '</span>';
							}
							else
							{
								$html[] = '<span class="icon-16-denied"><span class="icon-16-locked">' . JText::_('JLIB_RULES_NOT_ALLOWED_LOCKED')
									. '</span></span>';
							}
						}
					}
					else if (!empty($component))
					{
						$html[] = '<span class="icon-16-allowed"><span class="icon-16-locked">' . JText::_('JLIB_RULES_ALLOWED_ADMIN')
							. '</span></span>';
					}
					else
					{
						// Special handling for  groups that have global admin because they can't  be denied.
						// The admin rights can be changed.
						if ($action->name === 'core.admin')
						{
							$html[] = '<span class="icon-16-allowed">' . JText::_('JLIB_RULES_ALLOWED') . '</span>';
						}
						elseif ($inheritedRule === false)
						{
							// Other actions cannot be changed.
							$html[] = '<span class="icon-16-denied"><span class="icon-16-locked">'
								. JText::_('JLIB_RULES_NOT_ALLOWED_ADMIN_CONFLICT') . '</span></span>';
						}
						else
						{
							$html[] = '<span class="icon-16-allowed"><span class="icon-16-locked">' . JText::_('JLIB_RULES_ALLOWED_ADMIN')
								. '</span></span>';
						}
					}

					$html[] = '</td>';
				}

				$html[] = '</tr>';
			}

			$html[] = '</tbody>';
			$html[] = '</table></div>';

			$html[] = '</div></div>';
			$html[] = '</li>';

		}

		$html[] = str_repeat('</ul></li>', $curLevel);
		$html[] = '</ul><div class="rule-notes">';
		if ($section == 'component' || $section == null)
		{
			$html[] = JText::_('JLIB_RULES_SETTING_NOTES');
		}
		else
		{
			$html[] = JText::_('JLIB_RULES_SETTING_NOTES_ITEM');
		}
		$html[] = '</div></div>';

		$js = "window.addEvent('domready', function(){ new Fx.Accordion($$('div#permissions-sliders.pane-sliders .panel h3.pane-toggler'), $$('div#permissions-sliders.pane-sliders .panel div.pane-slider'), {onActive: function(toggler, i) {toggler.addClass('pane-toggler-down');toggler.removeClass('pane-toggler');i.addClass('pane-down');i.removeClass('pane-hide');Cookie.write('jpanesliders_permissions-sliders"
			. $component
			. "',$$('div#permissions-sliders.pane-sliders .panel h3').indexOf(toggler));},onBackground: function(toggler, i) {toggler.addClass('pane-toggler');toggler.removeClass('pane-toggler-down');i.addClass('pane-hide');i.removeClass('pane-down');},duration: 300,display: "
			. JRequest::getInt('jpanesliders_permissions-sliders' . $component, 0, 'cookie') . ",show: "
			. JRequest::getInt('jpanesliders_permissions-sliders' . $component, 0, 'cookie') . ", alwaysHide:true, opacity: false}); });";

		JFactory::getDocument()->addScriptDeclaration($js);

		return implode("\n", $html);
	}

	/**
	 * Get a list of the user groups.
	 *
	 * @return  array
	 *
	 * @since   11.1
	 */
	protected function getUserGroups()
	{
		// Initialise variables.
		$db = JFactory::getDBO();
		$query = $db->getQuery(true)->select('a.id AS value, a.title AS text, COUNT(DISTINCT b.id) AS level, a.parent_id')
			->from('#__usergroups AS a')->leftJoin($query->qn('#__usergroups') . ' AS b ON a.lft > b.lft AND a.rgt < b.rgt')->group('a.id')
			->order('a.lft ASC');

		$db->setQuery($query);
		$options = $db->loadObjectList();

		return $options;
	}
}