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First version, support for sending mail not yet implemented.

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Lewin Probst 2020-01-29 15:52:56 +01:00
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module.php Executable file
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<?php
use Gregwar\Captcha\CaptchaBuilder;
use Lewp\Resolve;
return new class extends Lewp\Module
{
const KEY_CSRF_TOKEN = 'csrf_token';
const KEY_CAPTCHA_PHRASE = 'captcha_phrase';
private function createForm()
{
$form = $this->createAndSetupElement(
'form',
'',
[
'method' => 'post',
'action' => '',
]
);
// LABEL NAME
$label_name = $this->createAndSetupElement(
'label',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'name'
])),
[
'for' => 'name',
]
);
$form->appendChild($label_name);
// NAME INPUT
$name = $this->createAndSetupElement(
'input',
'',
[
'id' => 'name',
'name' => 'name',
'type' => 'text',
'value' => $_POST['name'] ?? '',
]
);
$form->appendChild($name);
// LABEL Email
$label_email = $this->createAndSetupElement(
'label',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'email'
])),
[
'for' => 'email'
]
);
$form->appendChild($label_email);
// EMAIL INPUT
$email = $this->createAndSetupElement(
'input',
'',
[
'id' => 'email',
'name' => 'email',
'type' => 'email',
'value' => $_POST['email'] ?? '',
]
);
$form->appendChild($email);
// LABEL Message
$label_message = $this->createAndSetupElement(
'label',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'message'
])),
[
'for' => 'message'
]
);
$form->appendChild($label_message);
// MESSAGE INPUT
$message = $this->createAndSetupElement(
'textarea',
$_POST['message'] ?? '',
[
'id' => 'message',
'name' => 'message',
]
);
$form->appendChild($message);
// LABEL Captcha
$label_captcha = $this->createAndSetupElement(
'label',
'',
[
'for' => self::KEY_CAPTCHA_PHRASE
]
);
$label_captcha->appendChild($this->generateCaptcha());
$form->appendChild($label_captcha);
// CAPTCHA INPUT
$captcha = $this->createAndSetupElement(
'input',
'',
[
'id' => 'captchainput',
'name' => self::KEY_CAPTCHA_PHRASE,
'type' => 'text',
]
);
$form->appendChild($captcha);
// SUBMIT BUTTON
$submit = $this->createAndSetupElement(
'button',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'submit'
])),
[
'id' => 'submit',
'type' => 'submit',
]
);
$form->appendChild($submit);
// ADD CSRF CHECK
$form->appendChild($this->generateCsrfInput());
return $form;
}
private function generateCsrfInput()
{
// create token and save to session
$token = bin2hex(random_bytes(6));
$this->getSession()->set(self::KEY_CSRF_TOKEN, $token);
return $this->createAndSetupElement(
'input',
'',
[
'type' => 'hidden',
'name' => self::KEY_CSRF_TOKEN,
'value' => $token,
]
);
}
private function validateCsrfInput() : bool
{
if (!$this->formSubmitted()) {
return true;
}
$token = $this->getSession()->get(self::KEY_CSRF_TOKEN);
if (
is_null($_POST[self::KEY_CSRF_TOKEN])
|| $_POST[self::KEY_CSRF_TOKEN] !== $token
) {
return false;
}
return true;
}
private function generateCaptcha()
{
$builder = new CaptchaBuilder();
$builder->build();
$this->getSession()->set(self::KEY_CAPTCHA_PHRASE, $builder->getPhrase());
$img_captcha = $this->createAndSetupElement(
'img',
'',
[
'id' => 'captcha',
'src' => $builder->inline(),
]
);
return $img_captcha;
}
private function validateCaptcha() : bool
{
if (!$this->formSubmitted()) {
return true;
}
$valid_phrase = $this->getSession()->get(self::KEY_CAPTCHA_PHRASE);
if (
is_null($_POST[self::KEY_CAPTCHA_PHRASE])
|| $_POST[self::KEY_CAPTCHA_PHRASE] !== $valid_phrase
) {
return false;
}
return true;
}
private function formSubmitted()
{
return (
!is_null($_POST['name'])
|| !is_null($_POST['email'])
|| !is_null($_POST['message'])
) ? true : false;
}
public function run(array $options = []) : bool
{
if (!$this->validateCsrfInput()) {
$this->getSession()->getFlashBag()->add(
'error',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'flashmessages',
'error',
'csrf-failed'
]))
);
}
if (!$this->validateCaptcha()) {
$this->getSession()->getFlashBag()->add(
'error',
$this->loadTextFile(Resolve::arrayToId([
$this->getLanguage(),
'flashmessages',
'error',
'captcha-failed'
]))
);
}
$form = $this->createForm();
$this->appendChild($form);
return true;
}
public function onWebsocketRequest(
\Lewp\Websocket\Message $message
) : \Lewp\Websocket\Message {
}
};