<?php
/**
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2011, StatusNet, Inc.
 *
 * Add a new event
 *
 * PHP version 5
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @category  Event
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2011 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
 * @link      http://status.net/
 */

if (!defined('STATUSNET')) {
    // This check helps protect against security problems;
    // your code file can't be executed directly from the web.
    exit(1);
}

/**
 * Add a new event
 *
 * @category  Event
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2011 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
 * @link      http://status.net/
 */
class NeweventAction extends Action
{
    protected $user        = null;
    protected $error       = null;
    protected $complete    = null;
    protected $title       = null;
    protected $location    = null;
    protected $description = null;
    protected $startTime   = null;
    protected $endTime     = null;

    /**
     * Returns the title of the action
     *
     * @return string Action title
     */
    function title()
    {
        // TRANS: Title for new event form.
        return _m('TITLE','New event');
    }

    /**
     * For initializing members of the class.
     *
     * @param array $argarray misc. arguments
     *
     * @return boolean true
     */
    function prepare($argarray)
    {
        parent::prepare($argarray);

        $this->user = common_current_user();

        if (empty($this->user)) {
            // TRANS: Client exception thrown when trying to post an event while not logged in.
            throw new ClientException(_m('Must be logged in to post a event.'),
                                      403);
        }

        if ($this->isPost()) {
            $this->checkSessionToken();
        }

        try {

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

            if (empty($this->title)) {
                // TRANS: Client exception thrown when trying to post an event without providing a title.
                throw new ClientException(_m('Title required.'));
            }

            $this->location    = $this->trimmed('location');
            $this->url         = $this->trimmed('url');
            $this->description = $this->trimmed('description');
            $tz                = $this->trimmed('tz');

            $startDate = $this->trimmed('startdate');

            if (empty($startDate)) {
                // TRANS: Client exception thrown when trying to post an event without providing a start date.
                throw new ClientException(_m('Start date required.'));
            }

            $startTime = $this->trimmed('event-starttime');

            if (empty($startTime)) {
                $startTime = '00:00';
            }

            $endDate   = $this->trimmed('enddate');

            if (empty($endDate)) {
                // TRANS: Client exception thrown when trying to post an event without providing an end date.
                throw new ClientException(_m('End date required.'));
            }

            $endTime   = $this->trimmed('event-endtime');

            if (empty($endTime)) {
                $endTime = '00:00';
            }

            $start = $startDate . ' ' . $startTime . ' ' . $tz;
            $end   = $endDate . ' ' . $endTime . ' ' . $tz;

            $this->startTime = strtotime($start);
            $this->endTime   = strtotime($end);

            if ($this->startTime == 0) {
                // TRANS: Client exception thrown when trying to post an event with a date that cannot be processed.
                // TRANS: %s is the data that could not be processed.
                throw new ClientException(sprintf(_m('Could not parse date "%s".'),
                                            $start));
            }

            if ($this->endTime == 0) {
                // TRANS: Client exception thrown when trying to post an event with a date that cannot be processed.
                // TRANS: %s is the data that could not be processed.
                throw new ClientException(sprintf(_m('Could not parse date "%s".'),
                                            $end));
            }
        } catch (ClientException $ce) {
            if ($this->boolean('ajax')) {
                $this->outputAjaxError($ce->getMessage());
                return false;
            } else {
                $this->error = $ce->getMessage();
                $this->showPage();
                return false;
            }
        }

        return true;
    }

    /**
     * Handler method
     *
     * @param array $argarray is ignored since it's now passed in in prepare()
     *
     * @return void
     */
    function handle($argarray=null)
    {
        parent::handle($argarray);

        if ($this->isPost()) {
            $this->newEvent();
        } else {
            $this->showPage();
        }

        return;
    }

    /**
     * Add a new event
     *
     * @return void
     */
    function newEvent()
    {
        try {

            if (empty($this->title)) {
                // TRANS: Client exception thrown when trying to post an event without providing a title.
                throw new ClientException(_m('Event must have a title.'));
            }

            if (empty($this->startTime)) {
                // TRANS: Client exception thrown when trying to post an event without providing a start time.
                throw new ClientException(_m('Event must have a start time.'));
            }

            if (empty($this->endTime)) {
                // TRANS: Client exception thrown when trying to post an event without providing an end time.
                throw new ClientException(_m('Event must have an end time.'));
            }

            if (!empty($this->url) && Validate::uri($this->url) === false) {
                // TRANS: Client exception thrown when trying to post an event with an invalid URL.
                throw new ClientException(_m('URL must be valid.'));
            }

            $options = array();

            // Does the heavy-lifting for getting "To:" information

            ToSelector::fillOptions($this, $options);

            $profile = $this->user->getProfile();

            $saved = Happening::saveNew($profile,
                                        $this->startTime,
                                        $this->endTime,
                                        $this->title,
                                        $this->location,
                                        $this->description,
                                        $this->url,
                                        $options);

            $event = Happening::fromNotice($saved);

            RSVP::saveNew($profile, $event, RSVP::POSITIVE);

        } catch (ClientException $ce) {
            if ($this->boolean('ajax')) {
                $this->outputAjaxError($ce->getMessage());
                return;
            } else {
                $this->error = $ce->getMessage();
                $this->showPage();
                return;
            }
        }

        if ($this->boolean('ajax')) {
            $this->startHTML('text/xml;charset=utf-8');
            $this->elementStart('head');
            // TRANS: Page title after sending a notice.
            $this->element('title', null, _m('Event saved'));
            $this->elementEnd('head');
            $this->elementStart('body');
            $this->showNotice($saved);
            $this->elementEnd('body');
            $this->endHTML();
        } else {
            common_redirect($saved->getUrl(), 303);
        }
    }

    // @todo factor this out into a base class
    function outputAjaxError($msg)
    {
        $this->startHTML('text/xml;charset=utf-8');
        $this->elementStart('head');
        // TRANS: Page title after an AJAX error occurs
        $this->element('title', null, _('Ajax Error'));
        $this->elementEnd('head');
        $this->elementStart('body');
        $this->element('p', array('id' => 'error'), $msg);
        $this->elementEnd('body');
        $this->endHTML();
        return;
    }

    /**
     * Show the event form
     *
     * @return void
     */
    function showContent()
    {
        if (!empty($this->error)) {
            $this->element('p', 'error', $this->error);
        }

        $form = new EventForm($this);

        $form->show();

        return;
    }

    /**
     * Return true if read only.
     *
     * MAY override
     *
     * @param array $args other arguments
     *
     * @return boolean is read only action?
     */
    function isReadOnly($args)
    {
        if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
            $_SERVER['REQUEST_METHOD'] == 'HEAD') {
            return true;
        } else {
            return false;
        }
    }


    /**
     * Output a notice
     *
     * Used to generate the notice code for Ajax results.
     *
     * @param Notice $notice Notice that was saved
     *
     * @return void
     */
    function showNotice(Notice $notice)
    {
        $nli = new NoticeListItem($notice, $this);
        $nli->show();
    }
}
