linequest/app/create_form.php

<?php
require_once('../controller/validator.php');
require_once('../controller/formparser.php');
require_once('../controller/forms.php');
require_once('../templates/templates.php');
require_once('../controller/generateform.php');

$KEY_SIZE = 15; // max. 32
$FOLDER_SIZE = 10; // max. 32

function generateKeys ($email, $title) {
    global $KEY_SIZE;
    global $FOLDER_SIZE;
    $date = new DateTime();
    $input = $date->format("c").$email.$title;
    $sha = hash("sha256", $input);
    $key = array();
    $folder = array();
    $i = 0;
    for (; $i < $KEY_SIZE; $i++) {
        $key[] = $sha[$i];
    }
    for ($j = 0;$j < $FOLDER_SIZE; $j++ ) {
        $folder[] = $sha[$i+$j];
    }
    return [implode("", $key), implode("", $folder)];
}

if (empty($_POST)) {
    generateCreateForm();
} else {
    proccessRequest($_POST);
}

function generateCreateForm () {
    $template = getTemplate('create_form.html');
    $context = array('post_url' => htmlspecialchars($_SERVER["PHP_SELF"]));
    $template = parseTemplate($template, $context);
    echo $template;
}

function proccessRequest ($data) {
    try {
        Validator::check(['email', 'title', 'description','thanks'], $data);
        Validator::check(['formSource'], $_FILES);
        $from = array();
        $form['email'] = Validator::email($data['email']);
        $form['title'] = Validator::str($data['title']);
        $form['description'] = Validator::str($data['description']);
        $form['thanks'] = Validator::str($data['thanks']);

        $upload = Validator::file($_FILES['formSource'], 'txt');

        $formSource = file_get_contents($upload['tmp_name']);
        $reader = new SourceReader($formSource);
        $parser = new Parser($reader);
        $form['questions'] = $parser->parse();
        $keys = generateKeys($form['email'], $form['title']);
        $form['id'] = $keys[1];
        $html = generateFormHTML($form);
        storeNewForm($form, $keys, $formSource);
        $path = saveHTML($form['title'], $keys[1], $html);
        echo "Questionário gerado com sucesso. Acesse o <a href='../forms/$path'>link</a> para visualizar seu questionario!";

    } catch (Exception $e) {
        echo 'Os dados do formulários são inválidos! Certifique-se que todos os dados foram enviados e estão no formato correto: '.$e->getMessage().'<br/>';
        return;
    }
}

function cleanTitle ($title) {
    $clearstring = filter_var($title, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
    $clearstring = trim(preg_replace("/[^a-zA-Z0-9 ]/",'',$clearstring));
    $clearstring = trim(preg_replace("/[[:space:]]+/",'_',$clearstring));
    return strtolower($clearstring);
}

function saveHTML ($title, $folder,$html) {
    $date = new DateTime();
    $cleanTitle = cleanTitle($title);
    $datePart = $date->format("Y-m-j");
    $filePath = "$datePart-$cleanTitle-$folder.html";
    file_put_contents(__DIR__.'/../forms/'.$filePath, $html);
    return $filePath;
}