Ralapanawa REST web service demo

gistfile1.aw

<?php

function getStatusCodeMessage($status)
{
    $codes = Array(
        100 => 'Continue',
        101 => 'Switching Protocols',
        200 => 'OK',
        201 => 'Created',
        202 => 'Accepted',
        203 => 'Non-Authoritative Information',
        204 => 'No Content',
        205 => 'Reset Content',
        206 => 'Partial Content',
        300 => 'Multiple Choices',
        301 => 'Moved Permanently',
        302 => 'Found',
        303 => 'See Other',
        304 => 'Not Modified',
        305 => 'Use Proxy',
        306 => '(Unused)',
        307 => 'Temporary Redirect',
        400 => 'Bad Request',
        401 => 'Unauthorized',
        402 => 'Payment Required',
        403 => 'Forbidden',
        404 => 'Not Found',
        405 => 'Method Not Allowed',
        406 => 'Not Acceptable',
        407 => 'Proxy Authentication Required',
        408 => 'Request Timeout',
        409 => 'Conflict',
        410 => 'Gone',
        411 => 'Length Required',
        412 => 'Precondition Failed',
        413 => 'Request Entity Too Large',
        414 => 'Request-URI Too Long',
        415 => 'Unsupported Media Type',
        416 => 'Requested Range Not Satisfiable',
        417 => 'Expectation Failed',
        500 => 'Internal Server Error',
        501 => 'Not Implemented',
        502 => 'Bad Gateway',
        503 => 'Service Unavailable',
        504 => 'Gateway Timeout',
        505 => 'HTTP Version Not Supported'
    );

    return (isset($codes[$status])) ? $codes[$status] : '';
}

function sendResponse($status = 200, $body = '', $content_type = 'text/html')
{
    $status_header = 'HTTP/1.1 ' . $status . ' ' . getStatusCodeMessage($status);
    header($status_header);
    header('Content-type: ' . $content_type);
    echo $body;
}

class RalapanawaAPI {

    private $db;

    function __construct() {
        $this->db = new mysqli('localhost', 'root', 'sa', 'ralapanawa');
    }

    function __destruct() {
        $this->db->close();
    }

    function rala() {

        if (isset($_POST["tank_id"]) && isset($_POST["water_level"]) ) {
            try{
                $tank_id = $_POST["tank_id"];
                $water_level = $_POST["water_level"];

                $stmt = $this->db->prepare("INSERT INTO water_level (tankid, Depth) VALUES (?, ?)");
                $stmt->bind_param("ss", $tank_id, $water_level);
                $stmt->execute();
                $stmt->close();

                sendResponse(200, 'Water Level Saved!');
                return true;
            } catch (Exception $e) {
                $err = 'Caught exception: '.  $e->getMessage().  "\n";
                sendResponse(200, $err);
                return false;
            }
        }

        if (isset($_POST["tank_id"]) ) {

            $depth = "";
            $tank_id = $_POST["tank_id"];

            $stmt = $this->db->prepare("SELECT Depth FROM water_level WHERE tankid=?");
            $stmt->bind_param("s", $tank_id);
            $stmt->execute();
            $stmt->bind_result($depth);

            while ($stmt->fetch()) {
                break;
            }
            $stmt->close();

            $result = array(
                "water_level" => $depth
            );
            sendResponse(200, json_encode($result));
            return true;
        }

        sendResponse(400, 'Invalid request');
        return false;

    }
}

$api = new RalapanawaAPI;
$api->rala();

?>