<?
/* 
   This file is part of the 'Science Fair In A Box' project
   SFIAB Website: http://www.sfiab.ca

   Copyright (C) 2010 Youth Science Ontario <info@youthscienceontario.ca>
   Copyright (C) 2010 James Grant <james@lightbox.org>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public
   License as published by the Free Software Foundation, version 2.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/
?>
<?
include "common.inc.php";
require_once("common.inc.functions.php");
require_once("account.inc.php");
require_once("user.inc.php");
require_once("schedule.inc.php");
if($_SERVER['HTTPS']!="on" && !$API_DONT_REQUIRE_SSL) {
	$ret['status']="error";
	$ret['error']="SSL is required for API access, please access the API over https";
	echo json_encode($ret);
	exit;
}
$request=explode("/",$_GET['request']);
$ret=array();

$logPath = get_logpath();
$fout = fopen("$logPath/api.log", "a");
$t = date("Y-m-d H:i:s");
fwrite($fout, " --- request at " . date("Y-m-d H:i:s") . " ---\n");
fwrite($fout, "\$_GET = \n" . print_r($_GET, true) . "\n");
fwrite($fout, "\$_POST = \n" . print_r($_POST, true) . "\n");
fwrite($fout, "\$_SESSION = \n" . print_r($_SESSION, true) . "\n");

switch($request[0]) {
	case 'config':
		switch($request[1]){
			/*	APIDOC: config/variables
				description(retreives the entire configuration variables, minus ones that cant be included (like passwords)
				return(config array)
			*/
			case 'variables':
				$exclude=array("judge_registration_singlepassword","volunteer_registration_singlepassword","participant_registration_singlepassword","fairmanageremail");
				$configapi=$config;
				foreach($exclude AS $e) {
					unset($configapi[$e]);
				}
				$ret['status']="ok";
				$ret['config']=$configapi;
			break;

			/*	APIDOC: config/divisions
				description(retreives the list of divisions)
				return(divisions array)
			*/
			case 'divisions':
				$divs=projectdivisions_load();
				$ret['status']="ok";
				$ret['divisions']=$divs;
			break;

			/*	APIDOC: config/subdivisions
				description(retreives the list of subdivisions)
				return(subdivisions array)
			*/
			case 'subdivisions':
				$subdivs=projectsubdivisions_load();
				$ret['status']="ok";
				$ret['subdivisions']=$subdivs;
			break;

			/*	APIDOC: config/categories
				description(retreives the list of age categories)
				return(categories array)
			*/
			case 'categories':
				$cats=projectcategories_load();
				$ret['status']="ok";
				$ret['categories']=$cats;
			break;

		}
	break;

	case 'locations':
		switch($request[1]){
			case 'list':
				/*	APIDOC: locations/list
					description(lists locations at the current conference)
					return(locations array)
				*/
				$locationData = getLocationList($_SESSION['conferences_id']);
				if(is_array($locationData)){
					$ret['status'] = 'ok';
					$ret['locations'] = $locationData;
				}else{
					$ret['status'] = 'error';
					$ret['error'] = $locationData;
				}
				break;
			default:
				$ret['status'] = 'error';
				$ret['error']="Invalid API command ({$request[1]})";
		}
		break;
	case "schedule":
		$u = user_load($_SESSION['users_id']);
		$school_id = null;
		if($u['schools_id']) {
			$school_id=$u['schools_id'];
		}else{
			$ret['status'] = 'error';
			$ret['error']="Not connected to a school";
			break;
		}

		switch($request[1]){
			case 'list':
				/*	APIDOC: events/list
					description(gets a list of all events at the current conference, and team information if applicable)
					return(events array)
				*/
				$eventData = getEventList($_SESSION['conferences_id'], $school_id);
				if(is_array($eventData)){
					$ret['status'] = 'ok';
					$ret['events'] = $eventData;
				}else{
					$ret['status'] = 'error';
					$ret['error'] = $eventData;
				}
				break;

			case 'register':
				/*	APIDOC: schedule/register
					description(register a team for a scheduled event)
					post(team_id integer, schedule_id integer)
					return(results array)
				*/
				if(!array_key_exists('team_id', $_POST)){
					$ret['status'] = "error";
					$ret['error'] = 'team_id (integer) is required';
				}else if(!array_key_exists('schedule_id', $_POST)){
					$ret['status'] = "error";
					$ret['error'] = 'schedule_id (integer) is required';
				}else{
					$ret['status'] = 'ok';
					$ret['registration'] = registerTeamInEvent($_SESSION['conferences_id'], $_POST['schedule_id'], $_POST['team_id']);
				}
				break;

			case 'unregister':
				/*	APIDOC: schedule/register
					description(unregister a team for a scheduled event)
					post(team_id integer, schedule_id integer)
					return(results array)
				*/
				if(!array_key_exists('team_id', $_POST)){
					$ret['status'] = "error";
					$ret['error'] = 'team_id (integer) is required';
				}else if(!array_key_exists('schedule_id', $_POST)){
					$ret['status'] = "error";
					$ret['error'] = 'schedule_id (integer) is required';
				}else{
					$ret['status'] = 'ok';
					$ret['registration'] = unregisterTeamInEvent($_SESSION['conferences_id'], $_POST['schedule_id'], $_POST['team_id']);
				}
				break;

			default:
				$ret['status'] = 'error';
				$ret['error']="Invalid API command ({$request[1]})";

		}
		
		break;
	case "conferences":
		/*	APIDOC: conferences/switch
			description(switches the active conference)
			post(conferences_id integer)
			return(conferences_id integer)
		*/
		if($request[1]=="switch") {
			if($_POST['conferences_id']) {
				//this makes sure its valid and sets teh session
				switchConference($_POST['conferences_id']);

				//get rid of their current roles, and load their record for the new conference
				if(is_array($_SESSION['roles'])) {
					$_SESSION['roles']=array();
					user_conference_load($_SESSION['accounts_id'],$_SESSION['conferences_id']);
				}
				$ret['status']="ok";
				$ret['conferences_id']=$_SESSION['conferences_id'];
			} else {
				$ret['status']="error";
				$ret['error']='conferences_id (integer) is required';
			}
		}
		/*	APIDOC: conferences
			description(lists all conferences)
			return(conferences array)
		*/
		else {
			$ret['status']="ok";
			$ret['conferences']=array();

			$response=array();
			$q=mysql_query("SELECT id,name,type,status,copyoriginal,copyparent FROM conferences ORDER BY id");
			while($r=mysql_fetch_assoc($q)) {
				$response[]=$r;
			}
			$ret['conferences']=$response;
		}
		break;

	case "dates":
		/*	APIDOC: dates
			description(list dates for active conference)
			return(dates array)
		*/
		/*	APIDOC: dates/<conferences_id integer>
			description(list dates for specified conference)
			return(dates array)
		*/
		if($request[1]) {
			$cid=intval($request[1]);
		}
		else 
			$cid=$_SESSION['conferences_id'];

		$ret['status']="ok";
		$ret['dates']=array();
		$q=mysql_query("SELECT date,name,description FROM dates WHERE conferences_id='$cid' ORDER BY date");
		$dates=array();
		while($r=mysql_fetch_assoc($q)) {
			$dates[]=$r;
		}
		$ret['conferences_id']=$cid;
		$ret['dates']=$dates;
	break;

	case "account":
		switch($request[1]) {
			/*	APIDOC: account/create
				description(creates an account)
				post(username varchar(64), password varchar(64), email varchar(64) optional)
				return(account array)
			*/
			case 'create':
				$user = trim($_POST['username']);
				$pass = trim($_POST['password']);
				$email = trim($_POST['email']);
				if($user && $pass) {
					$a=account_create($user,$pass);
					if(is_array($a)) {
						if($email)
							account_set_email($a['id'],$email);
						$account=account_load($a['id']);
						$ret['status']="ok";
						$ret['account']=$account;
					}else{
						$ret['status'] = "error";
						$ret['error'] = $a;
					}
				} else {
					$ret['status']="error";
					$ret['error']="username (varchar 64) and password (varchar 64) are required ";
				}
			break;

			/*	APIDOC: account/view
				description(view account information for currently logged in account)
				return(account array)
			*/
			case 'view':
				if(isset($_SESSION['accounts_id'])) {
					$a = account_load($_SESSION['accounts_id']);
					$ret['status']='ok';
					$ret['account']=$a;
				}
				else {
					$ret['status']="error";
					$ret['error']="You are not logged in";
				}
			break;

			/*	APIDOC: account/edit
				notimplemented
				description(edits an account)
				post(account array)
				return(account array)
			*/
			case 'edit':
				if(isset($_SESSION['accounts_id'])) {

					// grab the relevant keys from $_POST
					$params = array();
					foreach($_POST as $key => $value){
						if(in_array($key, array('username', 'password', 'email', 'link_username_to_email'))){
							$params[$key] = $_POST[$key];
						}
					}

					if(count($params) > 0){
						$result = account_update_info($params);
						if($result == 'ok'){
							$a = account_load($_SESSION['accounts_id']);
							$ret['status'] = 'ok';
							$ret['account'] = $a;
						}else{
							
							$ret['status'] = "error";
							$ret['error'] = $result;
						}
					}else{
						$ret['status'] = "error";
						$ret['error'] = "No field values passed";
					}

				}else{
					$ret['status']="error";
					$ret['error']="You are not logged in";
				}
				
			break;

			default:
				$ret['status']="error";
				$ret['error']="invalid account command";
		}
	break;

	case "auth":
		/*	APIDOC: auth/login
			description(login to an account)
			post(username varchar(64), password varchar(64), conferences_id integer optional)
			return(account array, roles array, conferences_id integer)
		*/
		if($request[1]=="login") {
			$user = $_POST['username'];
			$pass = $_POST['password'];
			$cid = $_POST['conferences_id'];

			$accounts_id = try_login($user, $pass);
			if($accounts_id == false) {
				$ret['status']="error";
				$ret['error']="Invalid Username/Password";
			} 
			else {
				$a = account_load($accounts_id);
				$_SESSION['username']=$a['username'];
				$_SESSION['email']=$a['email'];
				$_SESSION['accounts_id']=$accounts_id;
				$_SESSION['superuser'] = ($a['superuser'] == 'yes') ? 'yes' : 'no';
				$_SESSION['roles']=array();

				if(!$cid) $cid=$_SESSION['conferences_id'];
				$status=user_conference_load($accounts_id,$cid);

				$ret['conferences_id']=$cid;
				$ret['status']="ok";
				$ret['account']=$a;
				//$ret['user']=user_load($_SESSION['users_id']);
				$ret['roles']=$_SESSION['roles'];
			}
		}
		/*	APIDOC: auth/logout
			description(logs out of an account)
			return(account array)
		*/
		else if($request[1]=="logout") {
			unset($_SESSION['username']);
			unset($_SESSION['email']);
			unset($_SESSION['accounts_id']);
			unset($_SESSION['superuser']);
			unset($_SESSION['roles']);
			unset($_SESSION['users_id']);
			unset($_SESSION['name']);
			$ret['status']="ok";
		}
		else {
			$ret['status']="error";
			$ret['error']="invalid auth command";
		}
	break;

	case "testauth":
		if($request[1]) {
			$ok=api_user_auth_required($request[1]);
		}
		else {
			$ok=api_user_auth_required();
		}

		if($ok['status']=="ok") {
			$ret['status']='ok';
		}
		else {
			$ret['status']="error";
			$ret['error']=$ok['error'];
		}

	break;
	case "scienceolympics":
		$chk=api_user_auth_required('teacher');
		if($chk['status']!="ok") {
			$ret['status']="error";
			$ret['error']=$chk['error'];
			break;
		}
		$u=user_load($_SESSION['users_id']);
		if(!$u['schools_id']) {
			$ret['status']="error";
			$ret['error']='Your teacher account is not attached to any school';
			break;
		}
		$school_id=$u['schools_id'];

		require_once("so_teams.inc.php");
		switch($request[1]) {
			case "teams":
				switch($request[2]) {
					/*	APIDOC: scienceolympics/teams/list
						description(lists the schools science olympics teams)
						return(teams array)
					*/
					case "list":
						$q=mysql_query("SELECT id,name FROM so_teams WHERE schools_id='{$u['schools_id']}' AND conferences_id='{$conference['id']}'");
						$ret['status']='ok';
						$teams=array();
						while($r=mysql_fetch_assoc($q)) {
							$teams[]=$r;
						}
						$ret['teams']=$teams;
					break;
					/*	APIDOC: scienceolympics/teams/add
						description(add a science olympics team to the logged in teacher's school)
						post(teamname varchar(64))
						return(team array);
					*/
					case "add":
						if($_POST['teamname']) {
							if($team=so_team_add($school_id,$conference['id'],$_POST['teamname'])) {
								$ret['team']=$team;
								$ret['status']="ok";
							}
							else {
								$ret['status']='error';
								$ret['error']='could not add team';
							}
						} else {
								$ret['status']='error';
								$ret['error']='teamname (varchar 64) is required';
						}
					break;
					/*	APIDOC: scienceolympics/teams/edit
						description(edit a science olympics team)
						post(id integer, teamname varchar(64))
						return(team array);
					*/
					case "edit":
						if($_POST['id'] && $_POST['teamname']) {
							if($team=so_team_edit($school_id,$_POST['id'],$_POST['teamname'])) {
								$ret['status']="ok";
								$ret['team']=$team;
							}
							else {
								$ret['status']='error';
								$ret['error']='could not edit team';
							}
						}
						else {
								$ret['status']='error';
								$ret['error']='id (integer), teamname (varchar 64) are required';
						}
					break;
					/*	APIDOC: scienceolympics/teams/delete
						description(delete a science olympics team)
						post(id integer)
					*/
					case "delete";
						if($_POST['id']) {
							if(so_team_delete($school_id,$_POST['id'])) {
								$ret['status']="ok";
							}
							else {
								$ret['status']='error';
								$ret['error']='could not delete team';
							}
						} else {
								$ret['status']='error';
								$ret['error']='id (integer) is required';
						}

					break;
					default:
						$ret['status']="error";
						$ret['error']="invalid scienceolympics/teams command ({$request[2]})";
					break;

				}
			break;
			default:
				$ret['status']="error";
				$ret['error']="invalid scienceolympics command ({$request[1]})";
			break;
		}
	break;
	case 'user':
		$chk=api_user_auth_required();
		if($chk['status']!="ok") {
			$ret['status']="error";
			$ret['error']=$chk['error'];
			break;
		}

		switch($request[1]) {
			/*	APIDOC: user/view
				description(view user information for current conference)
				return(user array)
			*/
			case "view":
				if($u=user_load($_SESSION['users_id'])) {
					//we dont need to send the 'orig' part of it
					unset($u['orig']);
					$ret['status']="ok";
					$ret['user']=$u;
				}
				else {
					$ret['status']="error";
					$ret['error']="Error loading user";
				}
			break;

			/*	APIDOC: user/edit
				description(edit user information for current conference)
				post(user array)
				return(user array)
			*/
			case "edit":
				if($origu=user_load($_SESSION['users_id'])) {
					$u=json_decode($_POST['user'],true);
					if(!is_array($u))  {
						$ret['status']="error";
						$ret['error']="user (array) is required.";
						break;
					}

					if($origu['id']!=$u['id']) {
						$ret['status']="error";
						$ret['error']="User ID mismatch";
						break;
					}

					$u['orig']=$origu['orig'];
					$result = user_save($u);
					if($result == 'ok') {
						$ret['status']="ok";
						$ret['user']=$u;
					} else {
						$ret['status']="error";
						$ret['error']=$result;
					}
				}
				else {
					$ret['status']="error";
					$ret['error']="Error loading user in order to edit";
				}
			break;

			/*	APIDOC: user/connect_to_school
				description(connects the current user to the specified school using the school's access code)
				post(schools_id integer, accesscode varchar(16))
				return(school array)
			*/
			case 'connect_to_school':
				if($u = user_load($_SESSION['users_id'])) {
					$schoolId = mysql_real_escape_string($_POST['schools_id']);
					$accesscode = mysql_real_escape_string($_POST['accesscode']);
					if(user_set_school($u, $schoolId, $accesscode)){
						$ret['status'] = "ok";
						$ret['school'] = mysql_fetch_assoc(mysql_query("SELECT school, phone, fax, address, city, province_code AS province, postalcode FROM schools WHERE id = $schoolId"));
					}else{
						$ret['status'] = "error";
						$ret['error'] = "Error matching schools_id and accesscode";
					}
				}else{
					$ret['status'] = "error";
					$ret['error'] = "Error loading user";
				}
	
				
			break;

			/*	APIDOC: user/invite
				description(invites a user to play a particular role in the conference, creating an account for them, and giving them the specifed role)
				post(username varchar(64), password varchar(64), email varchar(64), roles_id integer)
				return(user array)
			*/
			case 'invite':
				// let's make sure we have all of the data posted
				$ok = true;
				foreach(array('username' => 'varchar(64)', 'password' => 'varchar(64)', 'email' => 'varchar(64)', 'roles_id' => 'integer') as $field => $format){
					if(!array_key_exists($field, $_POST)){
						$ret['status'] == 'error';
						$ret['error'] = "$field ($format) is required";
						$ok = false;
						break;
					}
				}

				if($ok){
					$newUser = user_invite($_POST['username'], $_POST['password'], $_POST['email'], $_POST['roles_id']);
					if(is_array($newUser)){
						$ret['status'] = 'ok';
						$ret['user'] = $newUser;
					}else{
						$ret['status'] = 'error';
						$ret['error'] = $newUser;
					}
				}
			break;

			/*	APIDOC: user/uninvite
				description(uninvite a user from a particular role in the conference, removing only the role, not the user)
				post(users_id integer, roles_id integer)
				return(user array)
			*/
			case 'uninvite':
				if(!array_key_exists('users_id', $_POST)){
					$ret['status'] = 'error';
					$ret['error'] = 'parameter users_id required';
					break;
				}

				if(!array_key_exists('roles_id', $_POST)){
					$ret['status'] = 'error';
					$ret['error'] = 'parameter roles_id required';
					break;
				}
				
				$result = user_uninvite($_POST['users_id'], $_POST['roles_id']);

				if(is_array($result)){
					$ret['status'] = 'ok';
					$ret['user'] = $result;
				}else{
					$ret['status'] = 'error';
					$ret['error'] = $result;
				}
			break;

			/*	APIDOC: user/list
				description(list users of the specified role in this conference that the current user has permission to view/modify)
				post(roles_id integer)
				return(list array)
			*/
			case 'list':
				if(!array_key_exists('roles_id', $_POST)){
					$ret['status'] = 'error';
					$ret['error'] = 'parameter roles_id required';
				}else{
					$result = user_list_modifiable($_POST['roles_id']);
					if(is_array($result)){
						$ret['status'] = 'ok';
						$ret['list'] = $result;
					}else{
						$ret['status'] = 'error';
						$ret['error'] = $result;
					}
				}
			break;
		}

	break;

	case "role":
		//these ones dont need to be authenticated
		switch($request[1]) {
			/*	APIDOC: role/list
				description(list roles and their corresponding registration types)
				return(roles array)
			*/
			case "list":
				$q=mysql_query("SELECT * FROM roles ORDER BY name");
				$reqroles=array();
				while($r=mysql_fetch_assoc($q)) {
					if($config[$r['type']."_registration_type"]) {
						$r['registration']=$config[$r['type']."_registration_type"];
					}
					else
						$r['registration']="not available";
					$reqroles[]=$r;
				}
				$ret['status']="ok";
				$ret['roles']=$reqroles;

			break;

			/*	APIDOC: role/add
				post(role_id integer, password varchar(64) optional)
				description(add a role for the user to the current conference. Depending on the registraiton type, an optional password (singlepassword, schoolpassword, etc) can be specified)
				return(role array)
			*/
			case "add":
				$chk=api_user_auth_required();
				if($chk['status']!="ok") {
					$ret['status']="error";
					$ret['error']=$chk['error'];
					break;
				}

				$role_id=intval($_POST['role_id']);
				$password=trim($_POST['password']);
				if($password)
					$addstatus=account_add_role($_SESSION['accounts_id'],$role_id,$conference['id'],$password);
				else 
					$addstatus=account_add_role($_SESSION['accounts_id'],$role_id,$conference['id']);

				switch($addstatus) {
					case "ok":
						$ret['status']="ok";
						updateSessionRoles();
						break;
					case "invalidrole": $ret['status']="error"; $ret['error']="Invalid role"; break;
					case "invalidaccount": $ret['status']="error"; $ret['error']="Invalid account"; break;
					case "invalidconference": $ret['status']="error"; $ret['error']="Invalid conference"; break;
					case "invalidpassword": $ret['status']="error"; $ret['error']="Invalid password for role"; break;
					default: $ret['status']="error"; $ret['error']="unknown role add error";
				}
			break;

			/*	APIDOC: role/remove
				post(role_id integer)
				description(remove a role from the user for the current conference)
				return(role array)
			*/
			case "remove":
				$chk=api_user_auth_required();
				if($chk['status']!="ok") {
					$ret['status']="error";
					$ret['error']=$chk['error'];
					break;
				}

				$role_id=intval($_POST['role_id']);
				$removestatus=account_remove_role($_SESSION['accounts_id'],$role_id,$conference['id']);

				switch($removestatus) {
					case "ok":
						$ret['status']="ok";
						updateSessionRoles();
						break;
					case "invalidrole": $ret['status']="error"; $ret['error']="Invalid role"; break;
					case "invalidaccount": $ret['status']="error"; $ret['error']="Invalid account"; break;
					case "invalidconference": $ret['status']="error"; $ret['error']="Invalid conference"; break;
					default: $ret['status']="error"; $ret['error']="unknown role remove error";
				}

			break;

			default:
				$ret['status']="error";
				$ret['error']="invalid role command ({$request[1]})";
		}
	break;

	case 'registration':
		switch($request[1]){
			/*	APIDOC: registration/fields
				description(retreives the list of fields to be asked for in order to complete registration for a specific set of roles.  If an array of roles is passed in it retrieves the fields for those roles, if no roles are passed in, then it uses the roles from the currently logged in user)
				post(roles[] array) optional
				return(fields array)
			*/
			case 'fields':
				$reqroles=json_decode($_POST['roles'],true);
				if(is_array($reqroles)) {
					for($x=0;$x<count($reqroles);$x++) {
						if(is_numeric($reqroles[$x]))
							$reqroles[$x]=$roles_by_id[$reqroles[$x]]['type'];
						if(!array_key_exists($reqroles[$x],$roles))
							unset($reqroles[$x]);
					}
					$ret['status']="ok";
					$ret['roles']=$reqroles;
					$ret['fields']=user_get_fields($reqroles);
				} else {
					//load the currently logged in user
					if($_SESSION['users_id']) {
						$u = user_load($_SESSION['users_id']);
						if(is_array($u['roles']) && count($u['roles']>0)) {
							$ret['status']="ok";
							$ret['roles']=array_keys($u['roles']);
							$ret['fields']=user_get_fields(array_keys($u['roles']));
						} else {
							$ret['status']="error";
							$ret['error']="Currently logged in user has no roles";
						}
					} else {
						$ret['status']="error";
						$ret['error']="No roles submitted and not logged in";
					}
				}
			break;
			/*	APIDOC: registration/dictionary
				description(retrieves a list of all user fields with their label and category information)
				return(dictionary array)
			*/
			case 'dictionary':
				$ret['status'] = 'ok';
				if(is_array($conference) && array_key_exists('id', $conference)){
					$ret['dictionary'] = user_get_field_info();
				}else{
					$ret['dictionary'] = user_get_field_info(true);
				}
			break;

			default:
				$ret['status']="error";
				$ret['error']="invalid registration API command ({$request[1]})";
		}
	break;

	case 'school':
		switch($request[1]){
			/*	APIDOC: school/list
				description(list schools)
				return(schools array)
			*/
			case 'list':
				$ret['schools'] = get_schools($conference['id']);
				$ret['status'] = 'ok';
			break;
		}

	default:
		$ret['status']="error";
		$ret['error']="invalid API command ({$request[0]})";

}
fwrite($fout, "result = \n" . print_r($ret, true) . "\n");
fclose($fout);
echo json_encode($ret);
?>