<?php

require_once 'classes/master.php';

$rawInput = $HTTP_RAW_POST_DATA;
$output = array();
$returnValue = 418;

if (!empty($rawInput)) {

    $input = json_decode($rawInput);

    switch ($input->action) {
        case "login":
            $username = $input->args->username;
            $password = $input->args->password;
            $returnValue = 401;

            $user_results = User::get(array("name" => $username));
            if (!empty($user_results)) {
                $user = $user_results[0];
                if ($password == $user->password) {
                    $output = $user;
                    $returnValue = 200;
                }
            }
            break;
        case "register":
            $username = $input->args->username;
            $password = $input->args->password;
            $user_results = User::get(array("name" => $username));
            if (!empty($user_results)) {
                $returnValue = 409;
            } else {
                $user = new User();
                $user->name = $username;
                $user->password = $password;
                $user->save();
                $output = $user;
                $returnValue = 200;
            }
            break;
    }

    if (isset($input->uid)) {
        $user_results = User::get(array("uid" => $input->uid));
        if (!empty($user_results)) {
            $user = $user_results[0];
            switch ($input->action) {
                case "createObject":
                    $uid = null;
                    switch (strtolower($input->args->type)) {
                        case "application":
                            $newApp = new Application(null,
                                            $input->args->values->title,
                                            $input->args->values->description,
                                            $input->args->values->style);
                            $newApp->save();
                            $uid = $newApp->uid;
                            $returnValue = 200;
                            break;
                        case "survey":
                            $newSurvey = new Survey(null,
                                            $input->args->values->title,
                                            $input->args->values->description,
                                            $user, null);
                            $newSurvey->save();
                            $uid = $newSurvey->uid;
                            $returnValue = 200;
                            break;
                        case "dashboard":
                            //TODO
                            break;
                        case "question":
                            $newQuestion = new Question(null,
                                            $input->args->values->qCode,
                                            $input->args->values->title,
                                            $input->args->values->dataType,
                                            $input->args->values->description,
                                            $input->args->values->category,
                                            array());
                            $newQuestion->save();
                            $uid = $newQuestion->uid;
                            $returnValue = 200;
                            break;
                        case "session":
                            $newSession = new Session(null,
                                            $input->args->values->title,
                                            $user, new DateTime(), null, null);
                            $newSession->save();
                            $uid = $newSession->uid;
                            $returnValue = 200;
                            break;
                    }
                    $output['uid'] = $uid;
                    break;
                case "getObject":
                    $type = $input->args->type;
                    $objects = $type::get(array("uid" => $input->args->uid));
                    if (!empty($objects)) {
                        $output->object = $objects[0];
                        $returnValue = 200;
                    }
                    break;
                case "getObjects":
                    $type = $input->args->type;
                    $output['objects'] = $type::get($input->args->predicates);
                    $returnValue = 200;
                    break;
            }
        } else {
            $returnValue = 403;
        }
    }
}

header("HTTP/1.1 " . $returnValue);
header("Content-Type: application/json");
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
echo(json_encode($output));
?>