<?php
if (strpos($_SERVER['PHP_SELF'], "inc.php") !== false)
  exit("This file is meant to be included.");

function addNiverLog($message, $outputLines) {
  $logs = "\n" . date("Y-m-d H:i:s") . " " . $message . "\n";
  foreach ($outputLines as $outputLine) {
    $logs = $logs . " " .  $outputLine . "\n";
  }
  file_put_contents(ROOT_PATH . "/niver.log", $logs, FILE_APPEND);
}

function checkAction($action) {
  if ($action === "delete")
    return "un";
  else if ($action === "add")
    return "";
  else
    exit("ERROR: wrong value for action");
}

function userExist($username) {
  $usernameArray[0] = $username;

  $db = new PDO('sqlite:' . DB_PATH);

  $op = $db->prepare('SELECT username FROM users WHERE username = ?');
  $op->execute($usernameArray);

  $data = $op->fetch();
  if (isset($data['username']))
    $dbUsername = $data['username'];
  else
    $dbUsername = NULL;

  if (isset($dbUsername)) {
    return true;
  } else {
    return false;
  }
}