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<?php
namespace Drupal\feed_import\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\AfterCommand;
use Drupal\Core\Ajax\RemoveCommand;
use Drupal\Core\Ajax\BeforeCommand;
use Drupal\Core\Ajax\ReplaceCommand;
use Drupal\Component\Utility\Unicode;
use Drupal\feed_import_base\FeedImport;
class DynamicFilterForm extends FormBase {
protected $feed;
public function getFormId() {
return 'feed_import_dynamic_filter';
}
public function buildForm(array $form, FormStateInterface $form_state, $fid = NULL) {
$this->feed = FeedImport::loadFeed($fid);
if (is_null($form_state
->getValues())) {
drupal_set_message(t('Dynamic filter functions are created using eval() which can be dangerous for import!'), 'warning');
}
$form['description'] = array(
'#markup' => t('If possible please use a php file including filters (see Filter settings).') . '<br>' . t('Import will not start if any of these functions have syntax errors. If you have problems please check logs.') . '<br>' . '<strong>' . t('If an error occurs on runtime in one of these functions the whole script stops immediately, resulting a broken import process!') . '<br>' . t('Main purpose of these filter functions is testing.') . '<br>' . '</strong>' . '<i>' . t('Ok, eval() can be generally dangerous, but Feed Import assumes that access is enabled only for administrator.') . '</i>',
);
$form['fields'] = array(
'#type' => 'container',
'#tree' => TRUE,
'#attributes' => array(
'id' => 'feed_import_func_fields',
),
);
$func = array();
$current_item = $form_state
->get('current_item');
if (!is_null($current_item)) {
$fv = $form_state
->getValue('fields');
for ($i = 0; $i <= $current_item; $i++) {
if (!isset($fv['container_' . $i])) {
continue;
}
$field =& $fv['container_' . $i];
$func += $this
->generateFunctionItem($i, $field);
unset($field);
}
unset($fv);
}
else {
$current_item = -1;
foreach ($this->feed->settings['functions'] as &$field) {
$current_item++;
$func += $this
->generateFunctionItem($current_item, $field, TRUE);
}
unset($field);
}
$trigger = $form_state
->getTriggeringElement();
$cbk = isset($trigger['#name']) ? $trigger['#name'] : '';
if ($cbk == 'add_new_func') {
$fv = $form_state
->getValue('fields');
$form_state
->set('field_added', FALSE);
if ($field = Unicode::strtolower($form_state
->getValue('func'))) {
$i = -1;
$exists = FALSE;
while (++$i <= $current_item) {
if (isset($fv['container_' . $i]['name']) && $fv['container_' . $i]['name'] == $field) {
$exists = TRUE;
break;
}
}
if (!$exists) {
$form_state
->set('field_added', TRUE);
$current_item++;
$func += $this
->generateFunctionItem($current_item, array(
'name' => $field,
'args' => '',
'body' => '',
));
}
}
}
elseif (preg_match('/remove_container_([0-9]{1,9})/', $cbk, $match)) {
unset($func['container_' . $match[1]]);
}
$form_state
->set('current_item', $current_item);
$form['fields'] += $func;
$form['func'] = array(
'#type' => 'textfield',
'#title' => t('Function name'),
'#attributes' => array(
'id' => 'func-name',
),
'#description' => t('Name must start with underscore and can contain only alphanumeric chars or underscores.'),
'#prefix' => '<div id="func-container">',
'#suffix' => '</div>',
);
$form['add_new_func'] = array(
'#type' => 'button',
'#name' => 'add_new_func',
'#value' => t('Add function'),
'#ajax' => array(
'event' => 'click',
'method' => 'replaceWith',
'callback' => array(
$this,
'ajaxAddItem',
),
'wrapper' => 'feed_import_func_fields',
),
);
$form['submit'] = array(
'#type' => 'submit',
'#name' => 'save',
'#value' => t('Save functions'),
);
$form['#attached'] = array(
'library' => array(
'feed_import/behaviors',
),
);
return $form;
}
public function validateForm(array &$form, FormStateInterface $form_state) {
if ($form_state
->getValue('func') && !preg_match('/^_[a-z0-9_]+$/i', $form_state
->getValue('func'))) {
$form_state
->setError($form['func'], t('Name must start with underscore and can contain only alphanumeric chars or underscores.'));
$form['add_new_func']['#ajax']['wrapper'] = 'func-container';
}
}
public function submitForm(array &$form, FormStateInterface $form_state) {
$v = $form_state
->getValues();
if (!$this->feed) {
return;
}
$funcs = array();
for ($i = 0; $i <= $form_state
->get('current_item'); $i++) {
if (empty($v['fields']['container_' . $i]['name'])) {
continue;
}
$f = $v['fields']['container_' . $i];
unset($f['remove_container_' . $i]);
$f = array_map('trim', $f);
if ($f['name'] && $f['body']) {
$funcs[] = $f;
}
}
$this->feed->settings['functions'] = $funcs;
if (FeedImport::saveFeed($this->feed)) {
drupal_set_message(t('Feed saved'));
}
}
protected function generateFunctionItem($pos, array $values, $collapsed = FALSE) {
if (!preg_match('/^_[a-z0-9_]+$/i', $values['name'])) {
return array();
}
$container = 'container_' . $pos;
$item[$container] = array(
'#type' => 'fieldset',
'#title' => t('Function @name', array(
'@name' => $values['name'],
)),
'#collapsible' => TRUE,
'#collapsed' => $collapsed,
'#attributes' => array(
'id' => 'item_container_' . $pos,
),
);
$container =& $item[$container];
$container['name'] = array(
'#type' => 'textfield',
'#title' => t('Name'),
'#description' => t('Name must start with underscore and can contain only alphanumeric chars or underscores.'),
'#default_value' => $values['name'],
'#attributes' => array(
'id' => 'func_name_' . $pos,
),
);
$container['args'] = array(
'#type' => 'textfield',
'#title' => t('Parameters'),
'#description' => t('Use variable names separated by comma, like: $a, $b'),
'#default_value' => $values['args'],
);
$container['body'] = array(
'#type' => 'textarea',
'#rows' => 5,
'#title' => t('Body'),
'#description' => t('Write only the function body. Do not forget to return a value.'),
'#default_value' => $values['body'],
);
$container['remove_container_' . $pos] = array(
'#type' => 'button',
'#name' => 'remove_container_' . $pos,
'#value' => t('Remove function'),
'#ajax' => array(
'event' => 'click',
'wrapper' => 'item_container_' . $pos,
'callback' => array(
$this,
'ajaxRemoveItem',
),
'method' => 'replaceWith',
),
);
return $item;
}
public function ajaxAddItem(array &$form, FormStateInterface $form_state) {
$response = new AjaxResponse();
if ($form_state
->get('field_added')) {
$selector = '#' . $form['add_new_func']['#ajax']['wrapper'];
$content = $form['fields']['container_' . $form_state
->get('current_item')];
$response
->addCommand(new AfterCommand($selector, $content));
}
$status = array(
'#type' => 'status_messages',
);
$response
->addCommand(new ReplaceCommand('#func-container', $form['func']));
$response
->addCommand(new RemoveCommand('div.messages'));
$response
->addCommand(new BeforeCommand('.region-highlighted', $status));
return $response;
}
public function ajaxRemoveItem(array &$form, FormStateInterface $form_state) {
return array(
'#markup' => '',
);
}
}
