<?php
/*
#  Copyright (c) 2012, Gjøvik University College
#  All rights reserved.

#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are met:
#      * Redistributions of source code must retain the above copyright
#        notice, this list of conditions and the following disclaimer.
#      * Redistributions in binary form must reproduce the above copyright
#        notice, this list of conditions and the following disclaimer in the
#        documentation and/or other materials provided with the distribution.
#      * Neither the name of the Gjøvik University College nor the
#        names of its contributors may be used to endorse or promote products
#        derived from this software without specific prior written permission.
#       
#  THIS SOFTWARE IS PROVIDED BY Gjøvik University College ''AS IS'' AND ANY
#  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
#  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#  DISCLAIMED. IN NO EVENT SHALL Gjøvik University College BE LIABLE FOR ANY
#  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
#  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
#  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
#  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
require_once('config.php');
require_once('lib/auth_base.php');
require_once('lib/user_functions.php');
require_once('lib/common_functions.php');
require_once('lib/db_functions.php');
require_once('lib/phone_functions.php');

$config = get_config();

$config['sql_link'] = @mysql_connect( 
	$config['sql_server'],
	$config['sql_username'],
	$config['sql_password']
);
if ( !$config['sql_link'] )
{
	print json_encode( array( 'response' => 'failed', 'cause' => 'error', 'detail' => 'Database connection failed.'));
	exit;
}
token_auth();

//*************************************************************************************	
	switch ( $_SERVER['PATH_INFO'] )
	{
		case "/get":
			// Required GET parameters:
			// user: authentication username, SIP-username without domain component
			// domain: Domain/realm of the user. username + '@' + domain == SIP address.
			if ( array_key_exists( 'mac', $_POST) )
			{
				$mac = $_POST['mac'];
				$relations = get_phone_users ( $mac );
				if ( $relations )
				{
					print json_encode( array( 'response' => 'ok', 'list' => $relations ));
				}
				else print json_encode( array ( 'response' => 'failed', 'cause' => 'nonexistant', 'detail' => 'No results.'));
			}
			else if ( ( array_key_exists( 'username', $_POST) && array_key_exists( 'domain', $_POST ) ) || array_key_exists('user', $_POST) )
			{
				$username = "";
				$domain = "";
				if ( array_key_exists('username', $_POST) )
				{
					$username = $_POST['username'];
					$domain = $_POST['domain'];
				}
				else
				{
					$user = split_sipaddress($_POST['user']);
					if ( !$user )
					{
						print json_encode ( array( 'response' => 'failed', 'cause' => 'invalid', 'detail' => 'Invalid SIP address') );
						break;
					}
					list ( $username, $domain ) = $user;
				}

				$userdata = get_user_phones( $username, $domain );
				if ( $userdata )
				{
					print json_encode( array( 'response' => 'ok', 'list' => $userdata ));
				}
				else print json_encode( array ( 'response' => 'failed', 'cause' => 'nonexistant', 'detail' => 'No results.'));

			}
			else
				print json_encode ( array( 'response' => 'invalid') );
			break;
		case "/list":
			// List all (distinct) phone MAC-adresses registered...
			$search = null;
			if ( array_key_exists('search', $_POST ) )
				$search = $_POST['search'];

			$phones = list_phones( $search );
			print json_encode( array( 'response' => 'ok', 'list' => $phones ));
			break;
		case "/add":
			// Add a MAC+user...
			/*
			Parameters:
				mac	  The MAC-address of the phone to add an entry for
				Either:
				user	  A registered username on user@domain form (SIP address)
				Or:
				username  A registered username, combines with:
				domain    A valid domain .. to form a registered user@domain combo :)

			*/
			if ( array_key_exists('mac', $_POST ) &&
				( array_key_exists('user', $_POST) ||
					( array_key_exists('username', $_POST) && array_key_exists('domain', $_POST ))))
			{
				$username = "";
				$domain = "";
				if ( array_key_exists('username', $_POST) )
				{
					$username = $_POST['username'];
					$domain = $_POST['domain'];
				}
				else
				{
					$user = split_sipaddress($_POST['user']);
					if ( !$user )
					{
						print json_encode ( array( 'response' => 'failed', 'cause' => 'invalid', 'detail' => 'Invalid SIP address') );
						break;
					}
					list ( $username, $domain ) = $user;
				}
				$mac = clean_mac($_POST['mac']);
				if ( !$mac )
				{
					print json_encode ( array( 'response' => 'failed', 'cause' => 'invalid', 'detail' => 'No valid MAC address given.') );
					break;
				}
				
				if ( !is_provision_user ( $username, $domain ) )
				{
					print json_encode( array ( 'response' => 'failed', 'cause' => 'nonexistant', 'detail' => 'User not registered.'));
					break;
				}
				$phones = get_user_phones ( $username, $domain);
				if ( $phones && in_array( $mac, $phones ) )
				{
					print json_encode( array ( 'response' => 'failed', 'cause' => 'exists', 'detail' => 'This phone and user combination is already configured..'));
					break;
				}
				$res = add_phone_user ( $mac, $username, $domain );
				if ( !$res )
				{
					print json_encode( array ( 'response' => 'failed', 'cause' =>'dbfail', 'detail' => 'Failed to add phone to database.'));
					break;
				}
				else
				{
					print json_encode( array ( 'response' => 'ok', 'mac' => $mac, 'username' => $username, 'domain' => $domain) );
					break;
				}
				break;
			}
			else
				print json_encode ( array( 'response' => 'invalid') );
			break;


		case "/remove":
			// Del a MAC+user...
			/*
			Parameters:
				mac	  The MAC-address of the phone to add an entry for
				Either:
				user	  A registered username on user@domain form (SIP address)
				Or:
				username  A registered username, combines with:
				domain    A valid domain .. to form a registered user@domain combo :)

			*/
			if ( array_key_exists('mac', $_POST ) &&
				( array_key_exists('user', $_POST) ||
					( array_key_exists('username', $_POST) && array_key_exists('domain', $_POST ))))
			{
				$username = "";
				$domain = "";
				if ( array_key_exists('username', $_POST) )
				{
					$username = $_POST['username'];
					$domain = $_POST['domain'];
				}
				else
				{
					$user = split_sipaddress($_POST['user']);
					if ( !$user )
					{
						print json_encode ( array( 'response' => 'failed', 'cause' => 'invalid', 'detail' => 'Invalid SIP address') );
						break;
					}
					list ( $username, $domain ) = $user;
				}
				$mac = clean_mac($_POST['mac']);
				if ( !$mac )
				{
					print json_encode ( array( 'response' => 'failed', 'cause' => 'invalid', 'detail' => 'No valid MAC address given.') );
					break;
				}
				
				$phones = get_user_phones ( $username, $domain);
				if ( ! $phones || !in_array( $mac, $phones ) )
				{
					print json_encode( array ( 'response' => 'failed', 'cause' => 'nonexistant', 'detail' => 'Unable to locate requested combination'));
					break;
				}
				$res = delete_phone_user ( $mac, $username, $domain );
				if ( !$res )
				{
					print json_encode( array ( 'response' => 'failed', 'cause' =>'dbfail', 'detail' => 'Failed to remove phone from database.'));
					break;
				}
				else
				{
					print json_encode( array ( 'response' => 'ok', 'mac' => $mac, 'username' => $username, 'domain' => $domain ));
					break;
				}
				break;
			}
			else
				print json_encode ( array( 'response' => 'invalid') );
			break;


		default:
			print json_encode ( array( 'response' => 'invalid') );
	}
mysql_close( $config['sql_link'] );
?>