Proyectos de Subversion Moodle

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir .'/simplepie/moodle_simplepie.php');

class block_rss_client_edit_form extends block_edit_form {

    /** @var stdClass|null The new RSS feed URL object. */

    private ?stdClass $newrss = null;

                get_string('configmethodexisting', 'block_rss_client'), null, 'existing'),

            $mform->createElement('radio', 'config_method',

                get_string('configmethodnew', 'block_rss_client'), null, 'new'),

            elements: $radiogroup,

            appendName: false,

        $mform->setDefault('config_method', 'existing');

        // Add new RSS feed.

        $mform->addElement('text', 'config_feedurl', get_string('feedurl', 'block_rss_client'));

            $select->setMultiple(true);

                    get_string('nofeeds', 'block_rss_client'));

        // Subheading: Display settings for RSS feed.

        $mform->addElement('text', 'config_title', get_string('uploadlabel'));

        $mform->setType('config_title', PARAM_NOTAGS);

        $mform->addElement('selectyesno', 'config_display_description', get_string('displaydescriptionlabel', 'block_rss_client'));

        $mform->setDefault('config_display_description', 0);

        $mform->addElement('text', 'config_shownumentries', get_string('shownumentrieslabel', 'block_rss_client'), ['size' => 5]);

        $mform->setType('config_shownumentries', PARAM_INT);

        $mform->addRule('config_shownumentries', null, 'numeric', null, 'client');

        if (!empty($CFG->block_rss_client_num_entries)) {

            $mform->setDefault('config_shownumentries', $CFG->block_rss_client_num_entries);

        $mform->addElement('selectyesno', 'config_block_rss_client_show_channel_image', get_string('clientshowimagelabel', 'block_rss_client'));

        $mform->setDefault('config_block_rss_client_show_channel_image', 0);

    }

    /**

     * Overriding the get_data function to insert a new RSS ID.

     */

    public function get_data(): ?stdClass {

        $data = parent::get_data();

        // Force the 'existing` method as a default.

        $data->config_method = 'existing';

        // Sanitize the title to prevent XSS (Cross-Site Scripting) attacks by encoding special characters into HTML entities.

        $data->config_title = htmlspecialchars($data->config_title, ENT_QUOTES, 'utf-8');

        // If the new RSS is not empty then add the ID to the config_rssid.

        if ($data && $this->newrss) {

            $data->config_rssid[] = $this->newrss->id;

        }

        return $data;

    }

    /**

     * Overriding the definition_after_data to empty the input.

     */

    public function definition_after_data(): void {

        parent::definition_after_data();

        $mform =& $this->_form;

        // If form is not submitted then empty the feed URL.

        if (!$this->is_submitted()) {

            $mform->getElement('config_feedurl')->setValue('');

        }

    }

    /**

     * Overriding the validation to validate the RSS URL and store it to the database.

     *

     * If there are no errors, insert the new feed to the database and store the object in

     * the private property so it can be saved to the RSS block config.

     *

     * @param array $data Data from the form.

     * @param array $files Files form the form.

     * @return array of errors from validation.

     */

    public function validation($data, $files): array {

        global $USER, $DB;

        $errors = parent::validation($data, $files);

        if ($data['config_method'] === "new") {

            // If the "New" method is selected and the feed URL is not empty, then proceed.

            if ($data['config_feedurl']) {

                if (!filter_var($data['config_feedurl'], FILTER_VALIDATE_URL)) {

                    $errors['config_feedurl'] = get_string('couldnotfindloadrssfeed', 'block_rss_client');

                    return $errors;

                }

                try {

                    $rss = new moodle_simplepie();

                    // Set timeout for longer than normal to try and grab the feed.

                    $rss->set_timeout(10);

                    $rss->set_feed_url($data['config_feedurl']);

                    $rss->set_autodiscovery_cache_duration(0);

                    $rss->set_autodiscovery_level(moodle_simplepie::LOCATOR_ALL);

                    $rss->init();

                    if ($rss->error()) {

                        $errors['config_feedurl'] = get_string('couldnotfindloadrssfeed', 'block_rss_client');

                    } else {

                        // Return URL without quoting.

                        $discoveredurl = new moodle_url($rss->subscribe_url());

                        $theurl = $discoveredurl->out(false);

                        // Save the RSS to the database.

                        $this->newrss = new stdClass;

                        $this->newrss->userid = $USER->id;

                        $this->newrss->title = $rss->get_title();

                        $this->newrss->description = $rss->get_description();

                        $this->newrss->url = $theurl;

                        $newrssid = $DB->insert_record('block_rss_client', $this->newrss);

                        $this->newrss->id = $newrssid;

                    }

                } catch (Exception $e) {

                    $errors['config_feedurl'] = get_string('couldnotfindloadrssfeed', 'block_rss_client');

                }

            } else {

                // If the "New" method is selected, but the feed URL is empty, then raise error.

                $errors['config_feedurl'] = get_string('err_required', 'form');

            }