<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Miscellaneous settings
 *
 * @category  Settings
 * @package   GNUsocial
 * @author    Robin Millette <millette@status.net>
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2008-2009 StatusNet, Inc.
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */

defined('GNUSOCIAL') || die();

/**
 * Miscellaneous settings actions
 *
 * Currently this just manages URL shortening.
 *
 * @category  Settings
 * @package   GNUsocial
 * @author    Robin Millette <millette@status.net>
 * @author    Zach Copley <zach@status.net>
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */
class UrlsettingsAction extends SettingsAction
{
    /**
     * Title of the page
     *
     * @return string Title of the page
     */
    public function title()
    {
        // TRANS: Title of URL settings tab in profile settings.
        return _('URL settings');
    }

    /**
     * Instructions for use
     *
     * @return instructions for use
     */
    public function getInstructions()
    {
        // TRANS: Instructions for tab "Other" in user profile settings.
        return _('Manage various other options.');
    }

    public function showScripts()
    {
        parent::showScripts();
        $this->autofocus('urlshorteningservice');
    }

    /**
     * Content area of the page
     *
     * Shows a form for uploading an avatar.
     *
     * @return void
     */
    public function showContent()
    {
        $user = $this->scoped->getUser();

        $this->elementStart('form', array('method' => 'post',
                                          'id' => 'form_settings_other',
                                          'class' => 'form_settings',
                                          'action' =>
                                          common_local_url('urlsettings')));
        $this->elementStart('fieldset');
        $this->hidden('token', common_session_token());
        $this->elementStart('ul', 'form_data');

        $shorteners = array();

        Event::handle('GetUrlShorteners', array(&$shorteners));

        $services = array();

        foreach ($shorteners as $name => $value) {
            $services[$name] = $name;
            if ($value['freeService']) {
                // TRANS: Used as a suffix for free URL shorteners in a dropdown list in the tab "Other" of a
                // TRANS: user's profile settings. This message has one space at the beginning. Use your
                // TRANS: language's word separator here if it has one (most likely a single space).
                $services[$name] .= _(' (free service)');
            }
        }

        // Include default values

        // TRANS: Default value for URL shortening settings.
        $services['none']     = _('[none]');
        // TRANS: Default value for URL shortening settings.
        $services['internal'] = _('[internal]');

        if ($services) {
            asort($services);

            $this->elementStart('li');
            // TRANS: Label for dropdown with URL shortener services.
            $this->dropdown(
                'urlshorteningservice',
                _('Shorten URLs with'),
                // TRANS: Tooltip for for dropdown with URL shortener services.
                $services,
                _('Automatic shortening service to use.'),
                false,
                $user->urlshorteningservice
            );
            $this->elementEnd('li');
        }
        $this->elementStart('li');
        $this->input(
            'maxurllength',
            // TRANS: Field label in URL settings in profile.
            _('URL longer than'),
            ($this->arg('maxurllength') ?? User_urlshortener_prefs::maxUrlLength($user)),
            // TRANS: Field title in URL settings in profile.
            _('URLs longer than this will be shortened, -1 means never shorten because a URL is long.')
        );
        $this->elementEnd('li');
        $this->elementStart('li');
        $this->input(
            'maxnoticelength',
            // TRANS: Field label in URL settings in profile.
            _('Text longer than'),
            ($this->arg('maxnoticelength') ?? User_urlshortener_prefs::maxNoticeLength($user)),
            // TRANS: Field title in URL settings in profile.
            _('URLs in notices longer than this will always be shortened, -1 means only shorten if the full post exceeds maximum length.')
        );
        $this->elementEnd('li');
        $this->elementEnd('ul');
        // TRANS: Button text for saving "Other settings" in profile.
        $this->submit('save', _m('BUTTON', 'Save'));
        $this->elementEnd('fieldset');
        $this->elementEnd('form');
    }

    protected function doPost()
    {
        $urlshorteningservice = $this->trimmed('urlshorteningservice');

        if (!is_null($urlshorteningservice) && strlen($urlshorteningservice) > 50) {
            // TRANS: Form validation error for form "Other settings" in user profile.
            throw new ClientException(_('URL shortening service is too long (maximum 50 characters).'));
        }

        $maxurllength = $this->trimmed('maxurllength');

        if (!Validate::number($maxurllength, array('min' => -1))) {
            // TRANS: Client exception thrown when the maximum URL settings value is invalid in profile URL settings.
            throw new ClientException(_('Invalid number for maximum URL length.'));
        }

        $maxnoticelength = $this->trimmed('maxnoticelength');

        if (!Validate::number($maxnoticelength, array('min' => -1))) {
            // TRANS: Client exception thrown when the maximum notice length settings value is invalid in profile URL settings.
            throw new ClientException(_('Invalid number for maximum notice length.'));
        }

        $user = $this->scoped->getUser();

        $user->query('START TRANSACTION');

        $original = clone($user);

        $user->urlshorteningservice = $urlshorteningservice;

        $result = $user->update($original);

        if ($result === false) {
            common_log_db_error($user, 'UPDATE', __FILE__);
            $user->query('ROLLBACK');
            // TRANS: Server error displayed when "Other" settings in user profile could not be updated on the server.
            throw new ServerException(_('Could not update user.'));
        }

        $prefs = User_urlshortener_prefs::getPrefs($user);
        $orig  = null;

        if (!$prefs instanceof User_urlshortener_prefs) {
            $prefs = new User_urlshortener_prefs();

            $prefs->user_id = $user->id;
            $prefs->created = common_sql_now();
        } else {
            $orig = clone($prefs);
        }

        $prefs->urlshorteningservice = $urlshorteningservice;
        $prefs->maxurllength         = $maxurllength;
        $prefs->maxnoticelength      = $maxnoticelength;

        if ($orig instanceof User_urlshortener_prefs) {
            $result = $prefs->update($orig);
        } else {
            $result = $prefs->insert();
        }

        if ($result === null) {
            $user->query('ROLLBACK');
            // TRANS: Server exception thrown in profile URL settings when preferences could not be saved.
            throw new ServerException(_('Error saving user URL shortening preferences.'));
        }

        $user->query('COMMIT');

        // TRANS: Confirmation message after saving preferences.
        return _('Preferences saved.');
    }
}