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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  HTML
 *
 * @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;

/**
 * Extended Utility class for all HTML drawing classes.
 *
 * @package     Joomla.Platform
 * @subpackage  HTML
 * @since       11.1
 */
abstract class JHtmlRules
{
	/**
	 * Creates the HTML for the permissions widget
	 *
	 * @param   array    $actions   Array of action objects
	 * @param   integer  $assetId   Id of a specific asset to  create a widget for.
	 * @param   integer  $parent    Id of the parent of the asset
	 * @param   string   $control   The form control
	 * @param   string   $idPrefix  Prefix for the ids assigned to specific action-group pairs
	 *
	 * @return  string   HTML for the permissions widget
	 * 
	 * @since   11.1
	 * 
	 * @see     JAccess
	 * @see     JFormFieldRules
	 */
	public static function assetFormWidget($actions, $assetId = null, $parent = null, $control = 'jform[rules]', $idPrefix = 'jform_rules')
	{
		$images = self::_getImagesArray();

// Get the user groups.
		$groups = self::_getUserGroups();

// Get the incoming inherited rules as well as the asset specific rules.
		$inheriting = JAccess::getAssetRules($parent ? $parent : self::_getParentAssetId($assetId), true);
		$inherited = JAccess::getAssetRules($assetId, true);
		$rules = JAccess::getAssetRules($assetId);

$html = array();

$html[] = '<div class="acl-options">';
		$html[] = 		JHtml::_('tabs.start','acl-rules-'.$assetId, array('useCookie'=>1));
		$html[] = 		JHtml::_('tabs.panel',JText::_('JLIB_HTML_ACCESS_SUMMARY'), 'summary');
		$html[] = '			<p>'.JText::_('JLIB_HTML_ACCESS_SUMMARY_DESC').'</p>';
		$html[] = '			<table class="aclsummary-table" summary="'.JText::_('JLIB_HTML_ACCESS_SUMMARY_DESC').'">';
		$html[] = '			<caption>'.JText::_('JLIB_HTML_ACCESS_SUMMARY_DESC_CAPTION').'</caption>';
		$html[] = '			<tr>';
		$html[] = '				<th class="col1 hidelabeltxt">'.JText::_('JLIB_RULES_GROUPS').'</th>';
		foreach ($actions as $i => $action)
		{
			$html[] = '				<th class="col'.($i+2).'">'.JText::_($action->title).'</th>';
		}
		$html[] = '			</tr>';

foreach ($groups as $i => $group)
		{
			$html[] = '			<tr class="row'.($i%2).'">';
			$html[] = '				<td class="col1">'.$group->text.'</td>';
			foreach ($actions as $i => $action)
			{
				$html[] = '				<td class="col'.($i+2).'">'.
					(
						$assetId
						? ($inherited->allow($action->name, $group->identities) ? $images['allow'] : $images['deny'])
						: ($inheriting->allow($action->name, $group->identities) ? $images['allow'] : $images['deny'])
					).
					'</td>';
			}
			$html[] = '			</tr>';
		}

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

foreach ($actions as $action)
		{
			$actionTitle = JText::_($action->title);
			$actionDesc	= JText::_($action->description);
			$html[] = 		JHtml::_('tabs.panel',$actionTitle, $action->name);
			$html[] = '			<p>'.$actionDesc.'</p>';
			$html[] = '			<table class="aclmodify-table" summary="'.strip_tags($actionDesc).'">';
			$html[] = '			<caption>'.JText::_('JLIB_HTML_ACCESS_MODIFY_DESC_CAPTION_ACL').' '.$actionTitle.' '.JText::_('JLIB_HTML_ACCESS_MODIFY_DESC_CAPTION_TABLE').'</caption>';
			$html[] = '			<tr>';
			$html[] = '				<th class="col1 hidelabeltxt">'.JText::_('JLIB_RULES_GROUP').'</th>';
			$html[] = '				<th class="col2">'.JText::_('JLIB_RULES_INHERIT').'</th>';
			$html[] = '				<th class="col3 hidelabeltxt">'.JText::_('JMODIFY').'</th>';
			$html[] = '				<th class="col4">'.JText::_('JCURRENT').'</th>';
			$html[] = '			</tr>';

foreach ($groups as $i => $group)
			{
				$selected = $rules->allow($action->name, $group->value);

$html[] = '			<tr class="row'.($i%2).'">';
				$html[] = '				<td class="col1">'.$group->text.'</td>';
				$html[] = '				<td class="col2">'.($inheriting->allow($action->name, $group->identities) ? $images['allow-i'] : $images['deny-i']).'</td>';
				$html[] = '				<td class="col3">';
				$html[] = '					<select id="'.$idPrefix.'_'.$action->name.'_'.$group->value.'" class="inputbox" size="1" name="'.$control.'['.$action->name.']['.$group->value.']" title="'.JText::sprintf('JLIB_RULES_SELECT_ALLOW_DENY_GROUP', $actionTitle, $group->text).'">';
				$html[] = '						<option value=""'.($selected === null ? ' selected="selected"' : '').'>'.JText::_('JLIB_RULES_INHERIT').'</option>';
				$html[] = '						<option value="1"'.($selected === true ? ' selected="selected"' : '').'>'.JText::_('JLIB_RULES_ALLOWED').'</option>';
				$html[] = '						<option value="0"'.($selected === false ? ' selected="selected"' : '').'>'.JText::_('JLIB_RULES_DENIED').'</option>';
				$html[] = '					</select>';
				$html[] = '				</td>';
				$html[] = '				<td class="col4">'.($assetId ? ($inherited->allow($action->name, $group->identities) ? $images['allow'] : $images['deny']) : ($inheriting->allow($action->name, $group->identities) ? $images['allow'] : $images['deny'])).'</td>';
				$html[] = '			</tr>';
			}

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

$html[] = JHtml::_('tabs.end');

// Build the footer with legend and special purpose buttons.
		$html[] = '	<div class="clr"></div>';
		$html[] = '	<ul class="acllegend fltlft">';
		$html[] = '		<li class="acl-allowed">'.JText::_('JLIB_RULES_ALLOWED').'</li>';
		$html[] = '		<li class="acl-denied">'.JText::_('JLIB_RULES_DENIED').'</li>';
		$html[] = '	</ul>';
		$html[] = '</div>';

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

/**
	 * Get the id of the parent asset
	 *
	 * @param   integer  $assetId   The asset for which the parentid will be returned
	 *
	 * @return  integer  The id of the parent asset
	 *
	 * @since   11.1
	 */
	protected static function _getParentAssetId($assetId)
	{
		// Get a database object.
		$db = JFactory::getDBO();

// Get the user groups from the database.
		$db->setQuery(
			'SELECT parent_id' .
			' FROM #__assets' .
			' WHERE id = '.(int) $assetId
		);
		return (int) $db->loadResult();
	}

/**
	 * Get the user groups
	 *
	 * @return  array  Array of user groups 
	 *
	 * @since   11.1
	 */
	protected static function _getUserGroups()
	{
		// Get a database object.
		$db = JFactory::getDBO();

// Get the user groups from the database.
		$db->setQuery(
			'SELECT a.id AS value, a.title AS text, COUNT(DISTINCT b.id) AS level' .
			' , GROUP_CONCAT(b.id SEPARATOR \',\') AS parents' .
			' FROM #__usergroups AS a' .
			' LEFT JOIN #__usergroups AS b ON a.lft > b.lft AND a.rgt < b.rgt' .
			' GROUP BY a.id' .
			' ORDER BY a.lft ASC'
		);
		$options = $db->loadObjectList();

// Pre-compute additional values.
		foreach ($options as &$option)
		{
			// Pad the option text with spaces using depth level as a multiplier.

$option->identities = ($option->parents) ? explode(',', $option->parents.','.$option->value) : array($option->value);
		}

return $options;
	}

/**
	 * Get the array of images associate with specific permissions
	 *
	 * @return  array  An associative  array of permissions and images
	 *
	 * @since   11.1
	 */
	protected static function _getImagesArray()
	{
		$base = JURI::root(true);
		$images['allow-l'] = '<label class="icon-16-allow" title="'.JText::_('JLIB_RULES_ALLOWED').'">'.JText::_('JLIB_RULES_ALLOWED').'</label>';
		$images['deny-l'] = '<label class="icon-16-deny" title="'.JText::_('JLIB_RULES_DENIED').'">'.JText::_('JLIB_RULES_DENIED').'</label>';
		$images['allow'] = '<a class="icon-16-allow" title="'.JText::_('JLIB_RULES_ALLOWED').'"> </a>';
		$images['deny'] = '<a class="icon-16-deny" title="'.JText::_('JLIB_RULES_DENIED').'"> </a>';
		$images['allow-i'] = '<a class="icon-16-allowinactive" title="'.JText::_('JRULE_ALLOWED_INHERITED').'"> </a>';
		$images['deny-i'] = '<a class="icon-16-denyinactive" title="'.JText::_('JRULE_DENIED_INHERITED').'"> </a>';

return $images;
	}
}