get.php

<?php
namespace SmartData;

require_once('../bin/smartdata/SmartAPI.php');
use function SmartData\SmartAPI\get;
use SmartData\Exception\CustomException;
use SmartData\Logger;

function series2csv($response) {
    $str_header = "version,timestamp,unit,value,error,confidence,x,y,z,dev";
    $str_data = "";
    $json_resp = json_decode($response);
    $series = $json_resp->series;
    foreach ($series as &$smartdata) {
        $str_header .= "\n{$smartdata->version},";
        $str_header .= "{$smartdata->timestamp},";
        $str_header .= "{$smartdata->unit},";
        $str_header .= "{$smartdata->value},";
        $str_header .= "{$smartdata->error},";
        $str_header .= "{$smartdata->confidence},";
        $str_header .= "{$smartdata->x},";
        $str_header .= "{$smartdata->y},";
        $str_header .= "{$smartdata->z},";
        $str_header .= "{$smartdata->dev}";
    }
    unset($smartdata);
    $resp = array('series' => $str_header);
    return json_encode($resp);
}

http_response_code(HttpStatusCode::BAD_REQUEST);

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Headers: Content-Type, Content-length, X-Requested-With');
header("Access-Control-Allow-Methods: POST");

try {
    $content = file_get_contents('php://input');
    $response = get($content);

    if(isset($_GET['csv'])) {
        $response = series2csv($response);
    }

}catch(CustomException $e){
    http_response_code($e->getHTTPCodeError());
    Logger::exception($e);
    return false;
}catch(\Exception $e){
    http_response_code(HttpStatusCode::BAD_REQUEST);
    Logger::exception($e);
    return false;
}


http_response_code(HttpStatusCode::OK);
if ( isset( $response['headers'] ) ){
        foreach ( $response['headers'] as $header )
                header( $header );
} else {
        echo $response;
}