<?php
/**
 * @brief		Front Navigation Handler
 * @author		<a href='http://www.invisionpower.com'>Invision Power Services, Inc.</a>
 * @copyright	(c) 2001 - SVN_YYYY Invision Power Services, Inc.
 * @license		http://www.invisionpower.com/legal/standards/
 * @package		IPS Social Suite
 * @subpackage	Core
 * @since		30 Jun 2015
 * @version		SVN_VERSION_NUMBER
 */

namespace IPS\core;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * Front Navigation Extension: Custom Item
 */
class _FrontNavigation
{
	/**
	 * @brief	Singleton Instances
	 * @note	This needs to be declared in any child classes as well, only declaring here for editor code-complete/error-check functionality
	 */
	protected static $instance = NULL;

	/**
	 * Get instance
	 *
	 * @return	static
	 */
	public static function i()
	{
		if( static::$instance === NULL )
		{
			$classname = get_called_class();
			static::$instance = new $classname;
		}
		
		return static::$instance;
	}
	
	/**
	 * Get data store
	 *
	 * @param	bool	$noStore	If true, will skip datastore and get from DB (used for ACP preview)
	 * @return	array
	 */
	public static function frontNavigation( $noStore=FALSE )
	{
		if ( $noStore or !isset( \IPS\Data\Store::i()->frontNavigation ) )
		{
			$frontNavigation = array( 0 => array(), 1 => array() );
			$select = \IPS\Db::i()->select( '*', 'core_menu', NULL, 'position' );
			if ( count( $select ) )
			{
				foreach ( $select as $item )
				{
					if ( \IPS\Application::appIsEnabled( $item['app'] ) )
					{
						$frontNavigation[ intval( $item['parent'] ) ][ $item['id'] ] = $item;
					}
				}
			}
			elseif ( !$noStore )
			{
				static::buildDefaultFrontNavigation();
				return static::frontNavigation();
			}
			if ( $noStore )
			{
				return $frontNavigation;
			}
			\IPS\Data\Store::i()->frontNavigation = $frontNavigation;
		}
		return \IPS\Data\Store::i()->frontNavigation;
	}
	
	/**
	 * Delete front navigation items by application
	 *
	 * @param	\IPS\Application	$app	Application deleted
	 * @return	void
	 */
	public static function deleteByApplication( \IPS\Application $app )
	{
		foreach( \IPS\Db::i()->select( '*', 'core_menu', array( array( 'extension=?', 'CustomItem' ) ) ) as $row )
		{
			$config = json_decode( $row['config'], TRUE );
		
			if ( isset( $config['menu_custom_item_url'] ) and $config['menu_custom_item_url'] and isset( $config['internal'] ) and $config['internal'] )
			{
				try
				{
					$data = \IPS\Http\Url::internal( $config['menu_custom_item_url'], NULL, $config['internal'] )->getFriendlyUrlData();
					
					if ( ! empty( $data['app'] ) and $data['app'] === $app->directory )
					{
						\IPS\Db::i()->delete( 'core_menu', array( 'id=?', $row['id'] ) );
					}
				}
				catch( \Exception $e ) { }
			}
		}
		
		\IPS\Db::i()->delete( 'core_menu', array( 'app=?', $app->directory ) );
		
		unset( \IPS\Data\Store::i()->frontNavigation );
	}
	
	/**
	 * Build default front navigation
	 *
	 * @return	void
	 */
	public static function buildDefaultFrontNavigation()
	{		
		\IPS\Db::i()->delete( 'core_menu' );
		
		$topLevelPosition = 1;
		
		/* Browse */
		\IPS\Db::i()->insert( 'core_menu', array(
			'id'			=> 1,
			'app'			=> 'core',
			'extension'		=> 'CustomItem',
			'config'		=> json_encode( array( 'menu_custom_item_url' => '', 'internal' => '' ) ),
			'position'		=> $topLevelPosition++,
			'parent'		=> NULL,
			'permissions'	=> '*',
		) );

		/* Activity */
		\IPS\Db::i()->insert( 'core_menu', array(
			'id'			=> 2,
			'app'			=> 'core',
			'extension'		=> 'CustomItem',
			'config'		=> json_encode( array( 'menu_custom_item_url' => 'app=core&module=discover&controller=streams', 'internal' => 'discover_all' ) ),
			'position'		=> $topLevelPosition++,
			'parent'		=> NULL,
			'permissions'	=> '*',
		) );	
				
		/* Commerce requires a bit of a special set up */
		if ( \IPS\Application::appIsEnabled('nexus') )
		{
			/* Store */
			\IPS\Db::i()->insert( 'core_menu', array(
				'id'			=> 4,
				'app'			=> 'nexus',
				'extension'		=> 'Store',
				'config'		=> json_encode( array() ),
				'position'		=> $topLevelPosition++,
				'parent'		=> NULL,
				'permissions'	=> '*',
			) );
	
			/* Support */
			\IPS\Db::i()->insert( 'core_menu', array(
				'id'			=> 5,
				'app'			=> 'core',
				'extension'		=> 'CustomItem',
				'config'		=> json_encode( array( 'menu_custom_item_url' => 'app=nexus&module=support&controller=home', 'internal' => 'support' ) ),
				'position'		=> $topLevelPosition++,
				'parent'		=> NULL,
				'permissions'	=> '*',
			) );
			
			/* My Details */
			\IPS\Db::i()->insert( 'core_menu', array(
				'id'			=> 6,
				'app'			=> 'core',
				'extension'		=> 'Menu',
				'config'		=> json_encode( array() ),
				'position'		=> 5,
				'parent'		=> 4,
				'permissions'	=> '*',
			) );
		}

		/* Browse subitems */
		$communityApps = array( 'forums', 'gallery', 'downloads', 'cms', 'blog', 'calendar', 'chat' );
		$browsePosition = 1;
		$toInsert = array();
		foreach ( $communityApps as $app )
		{
			if ( \IPS\Application::appIsEnabled( $app ) )
			{
				foreach ( array_keys( \IPS\Application::load( $app )->extensions( 'core', 'FrontNavigation', FALSE ) ) as $key )
				{
					$config = array();
					if ( $app === 'cms' and $key === 'Cms' )
					{
						/* Cms.php was added to prevent upgrades breaking */
						continue;	
					}
					
					if ( $app === 'cms' and $key === 'Pages' )
					{
						try
						{
							$defaultPage = \IPS\cms\Pages\Page::getDefaultPage();
							$config = array( 'menu_content_page' => $defaultPage->id, 'menu_title_page_type' => 0 );
						}
						catch( \OutOfRangeException $ex )
						{
							continue;
						}
					}
					
					$toInsert[] = array(
						'app'			=> $app,
						'extension'		=> $key,
						'config'		=> json_encode( $config ),
						'position'		=> $browsePosition++,
						'parent'		=> 1,
						'permissions'	=> '',
					);
				}
			}
		}

		/* Insert Apps */
		\IPS\Db::i()->insert( 'core_menu', $toInsert );

		/* Other 'browse' items */
		foreach ( array( 'Guidelines', 'StaffDirectory', 'OnlineUsers' ) as $k )
		{
			\IPS\Db::i()->insert( 'core_menu', array(
				'app'			=> 'core',
				'extension'		=> $k,
				'config'		=> json_encode( array() ),
				'position'		=> $browsePosition++,
				'parent'		=> 1,
				'permissions'	=> '',
			) );
		}
		
		/* Activity Subitems */
		$activityPosition = 1;
		foreach ( array( 'AllActivity', 'YourActivityStreams' ) as $k )
		{
			\IPS\Db::i()->insert( 'core_menu', array(
				'app'			=> 'core',
				'extension'		=> $k,
				'config'		=> json_encode( array() ),
				'position'		=> $activityPosition++,
				'parent'		=> 2,
				'permissions'	=> '',
			) );
		}
		foreach ( array( 1, 2 ) as $k )
		{
			try
			{
				\IPS\core\Stream::load( $k );
				\IPS\Db::i()->insert( 'core_menu', array(
					'app'			=> 'core',
					'extension'		=> 'YourActivityStreamsItem',
					'config'		=> json_encode( array( 'menu_stream_id' => $k ) ),
					'position'		=> $activityPosition++,
					'parent'		=> 2,
					'permissions'	=> '',
				) );
			}
			catch ( \Exception $e ) { }
		}
		foreach ( array( 'Search' ) as $k )
		{
			\IPS\Db::i()->insert( 'core_menu', array(
				'app'			=> 'core',
				'extension'		=> $k,
				'config'		=> json_encode( array() ),
				'position'		=> $activityPosition++,
				'parent'		=> 2,
				'permissions'	=> '',
			) );
		}
		
		/* Commerce requires a bit of a special set up */
		if ( \IPS\Application::appIsEnabled('nexus') )
		{
			$storePosition = 1;
			foreach ( array( 'Donations', 'Orders', 'Purchases' ) as $k )
			{
				\IPS\Db::i()->insert( 'core_menu', array(
					'app'			=> 'nexus',
					'extension'		=> $k,
					'config'		=> json_encode( array() ),
					'position'		=> $storePosition++,
					'parent'		=> 4,
					'permissions'	=> '',
				) );
			}
			
			$myDetailsPosition = 1;
			foreach ( array( 'Info', 'Addresses', 'Cards', 'Credit', 'Alternatives', 'Referrals' ) as $k )
			{
				\IPS\Db::i()->insert( 'core_menu', array(
					'app'			=> 'nexus',
					'extension'		=> $k,
					'config'		=> json_encode( array() ),
					'position'		=> $myDetailsPosition++,
					'parent'		=> 6,
					'permissions'	=> '',
				) );
			}
			
			$supportPosition = 1;
			foreach ( array( 'Support', 'NetworkStatus' ) as $k )
			{
				\IPS\Db::i()->insert( 'core_menu', array(
					'app'			=> 'nexus',
					'extension'		=> $k,
					'config'		=> json_encode( array() ),
					'position'		=> $supportPosition++,
					'parent'		=> 5,
					'permissions'	=> '',
				) );
			}
		}
		
		/* Other apps */
		$toGiveToParents = array();
		$parentIds = array();
		foreach ( \IPS\Application::allExtensions( 'core', 'FrontNavigation', FALSE, NULL, NULL, FALSE ) as $key => $class )
		{
			$exploded = explode( '_', $key );
			if ( !in_array( $exploded[0], array_merge( $communityApps, array( 'core', 'nexus' ) ) ) )
			{
				$parentIds[ $exploded[0] ][ $exploded[1] ] = \IPS\Db::i()->insert( 'core_menu', array(
					'app'			=> $exploded[0],
					'extension'		=> $exploded[1],
					'config'		=> json_encode( array() ),
					'position'		=> $topLevelPosition++,
					'parent'		=> NULL,
					'permissions'	=> '',
				) );
			}
		}
	}
	
	/**
	 * @brief	The active primary navigation bar
	 */
	public $activePrimaryNavBar = NULL;
	
	/**
	 * Get roots
	 *
	 * @param	bool	$noStore	If true, will skip datastore and get from DB (used for ACP preview)
	 * @return	array
	 */
	public function roots( $noStore=FALSE )
	{
		$frontNavigation = static::frontNavigation( $noStore );
		$return = array();
		foreach ( $frontNavigation[0] as $item )
		{
			$class = 'IPS\\' . $item['app'] . '\extensions\core\FrontNavigation\\' . $item['extension'];
			$object = new $class( json_decode( $item['config'], TRUE ), $item['id'], $item['permissions'] );
			if ( !$this->activePrimaryNavBar )
			{
				$this->activePrimaryNavBar = $item['id'];
			}
			$return[ $item['id'] ] = $object;
		}
		return $return;
	}
	
	/**
	 * Get sub-bars
	 *
	 * @param	bool	$noStore	If true, will skip datastore and get from DB (used for ACP preview)
	 * @return	array
	 */
	public function subBars( $noStore=FALSE )
	{
		$frontNavigation = static::frontNavigation( $noStore );
		$return = array();
		$parentIDs = array();
		// Changed so that empty sub bars don't add an array to their parent, allowing us to do count( $subBars ) and figure
		// out if there's any to show.
		foreach ( $frontNavigation[0] as $item )
		{
			$parentIDs[] = $item['id'];
		}

		foreach ( $parentIDs as $i )
		{
			if ( isset( $frontNavigation[$i] ) )
			{
				foreach ( $frontNavigation[$i] as $item )
				{
					$class = 'IPS\\' . $item['app'] . '\extensions\core\FrontNavigation\\' . $item['extension'];
					$return[ $item['parent'] ][ $item['id'] ] = new $class( json_decode( $item['config'], TRUE ), $item['id'], $item['permissions'] );
				}
			}
		}
		return $return;
	}
}