<?php
/**
 * @brief		API Splash Page
 * @since		03 Dec 2015
 */

namespace IPS\core\modules\admin\applications;

/* 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;
}

/**
 * API Splash Page
 */
class _api extends \IPS\Dispatcher\Controller
{
	/**
	 * @brief	Has been CSRF-protected
	 */
	public static $csrfProtected = TRUE;
	
	/**
	 * Call
	 *
	 * @param	string	$method	Method that was called
	 * @param	mixed	$args	Arguments passed in
	 * @return	void
	 */
	public function __call( $method, $args )
	{
		\IPS\Output::i()->responsive = FALSE;
		
		/* Check htaccess is correct */
		if ( \IPS\Settings::i()->use_friendly_urls and \IPS\Settings::i()->htaccess_mod_rewrite OR \IPS\Request::i()->fromZapier )
		{
			$url = \IPS\Http\Url::external( rtrim( \IPS\Settings::i()->base_url, '/' ) . '/api/core/hello' );
		}
		else
		{
			$url = \IPS\Http\Url::external( rtrim( \IPS\Settings::i()->base_url, '/' ) . '/api/index.php?/core/hello' );
		}
		try
		{
			if ( \IPS\Request::i()->isCgi() )
			{
				$response = $url->setQueryString( 'key', 'test' )->request()->get();
			}
			else
			{
				$response = $url->request()->login( 'test', '' )->get();
			}

			$response = $response->decodeJson();

			if( isset( $response['errorMessage'] ) )
			{
				if ( $response['errorMessage'] === 'IP_ADDRESS_BANNED' )
				{
					\IPS\Output::i()->error( 'api_blocked_self', '3C402/1', 500, '' );
				}

				if ( $response['errorMessage'] !== 'INVALID_API_KEY' AND $response['errorMessage'] !== 'TOO_MANY_REQUESTS_WITH_BAD_KEY' )
				{
					/* Is it being blocked by a file? */
					if( @\file_exists( \IPS\ROOT_PATH . '/api/core' ) )
					{
						\IPS\Output::i()->error( \IPS\Member::loggedIn()->language()->addToStack( 'api_blocked_file', FALSE, array( 'sprintf' => array( \IPS\ROOT_PATH ) ) ), '3C402/2', 500, '' );
					}

					/* Plain not working, so bubble up. */
					throw new \Exception($response['errorMessage']);
				}
			}
			// Throw an exception if the response is null; This will be the case if the request was sent to api/core/hello but the htaccess file missing
			else if ( $response === NULL )
			{
				throw new \Exception;
			}
		}
		catch ( \Exception $e )
		{
			\IPS\Output::i()->title = \IPS\Member::loggedIn()->language()->addToStack('menu__core_applications_api');
			\IPS\Output::i()->output = \IPS\Theme::i()->getTemplate( 'api' )->htaccess( isset( \IPS\Request::i()->recheck ), $url, $e->getMessage() );
			return;
		}
		
		/* Work out tabs */
		$tabs = array();
		if ( \IPS\Member::loggedIn()->hasAcpRestriction( 'core', 'applications', 'oauth_manage' ) )
		{
			$tabs['oauth'] = 'oauth_clients';
		}
		if( \IPS\Member::loggedIn()->hasAcpRestriction( 'core', 'applications', 'api_manage' ) )
		{
			$tabs['apiKeys'] = 'api_keys';
		}
		if( \IPS\Member::loggedIn()->hasAcpRestriction( 'core', 'applications', 'api_logs' ) )
		{
			$tabs['apiLogs'] = 'api_logs';
		}
		if( \IPS\Member::loggedIn()->hasAcpRestriction( 'core', 'applications', 'api_reference' ) )
		{
			$tabs['apiReference'] = 'api_reference';
		}
		if( \IPS\Member::loggedIn()->hasAcpRestriction( 'core', 'applications', 'webhooks_manage' ) )
		{
			$tabs['webhooks'] = 'webhooks';
			$tabs['webhooksReference'] = 'webhooks_reference';
		}


		if ( isset( \IPS\Request::i()->tab ) and isset( $tabs[ \IPS\Request::i()->tab ] ) )
		{
			$activeTab = \IPS\Request::i()->tab;
		}
		else
		{
			$_tabs = array_keys( $tabs ) ;
			$activeTab = array_shift( $_tabs );
		}
		
		/* Route */
		$classname = 'IPS\core\modules\admin\applications\\' . $activeTab;
		$class = new $classname;
		$class->url = \IPS\Http\Url::internal("app=core&module=applications&controller=api&tab={$activeTab}");
		$class->execute();
		
		$output = \IPS\Output::i()->output;

		\IPS\Output::i()->cssFiles = array_merge( \IPS\Output::i()->cssFiles, \IPS\Theme::i()->css( 'system/api.css', 'core', 'admin' ) );
		\IPS\Output::i()->jsFiles  = array_merge( \IPS\Output::i()->jsFiles, \IPS\Output::i()->js( 'admin_system.js', 'core', 'admin' ) );
				
		if ( $method !== 'manage' or \IPS\Request::i()->isAjax() )
		{
			return;
		}
		\IPS\Output::i()->output = '';
				
		/* Output */
		\IPS\Output::i()->title = \IPS\Member::loggedIn()->language()->addToStack('menu__core_applications_api');
		\IPS\Output::i()->output .= \IPS\Theme::i()->getTemplate( 'forms', 'core' )->blurb( 'rest_and_oauth_blurb' );
		\IPS\Output::i()->output .= \IPS\Theme::i()->getTemplate( 'global', 'core' )->tabs( $tabs, $activeTab, $output, \IPS\Http\Url::internal( "app=core&module=applications&controller=api" ) );
	}
	
	/**
	 * Download .htaccess file
	 *
	 * @return	void
	 */
	protected function htaccess()
	{
		$dir = rtrim( str_replace( \IPS\CP_DIRECTORY . '/index.php', '', $_SERVER['PHP_SELF'] ), '/' ) . '/api/';
		$path = $dir . 'index.php';
		if( \strpos( $dir, ' ' ) !== FALSE )
		{
			$dir = '"' . $dir . '"';
			$path = '"' . $path . '"';
		}

		$htaccess = <<<FILE
<IfModule mod_setenvif.c>
SetEnvIf Authorization .+ HTTP_AUTHORIZATION=$0
</IfModule>
<IfModule mod_rewrite.c>
Options -MultiViews
RewriteEngine On
RewriteBase {$dir}
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
</IfModule>
FILE;

		\IPS\Output::i()->sendOutput( $htaccess, 200, 'application/x-htaccess', array( 'Content-Disposition' => 'attachment; filename=.htaccess' ) );
	}
}