<?php
/**
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * 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/>.
 */

if (!defined('LACONICA')) {
    exit(1);
}

require_once INSTALLDIR.'/lib/profilelist.php';

// 10x8

define('AVATARS_PER_PAGE', 80);

class GalleryAction extends Action
{
    function is_readonly()
    {
        return true;
    }

    function handle($args)
    {
        parent::handle($args);

        // Post from the tag dropdown; redirect to a GET

        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
            common_redirect($this->self_url(), 307);
        }

        $nickname = common_canonical_nickname($this->arg('nickname'));

        $user = User::staticGet('nickname', $nickname);

        if (!$user) {
            $this->no_such_user();
            return;
        }

        $profile = $user->getProfile();

        if (!$profile) {
            $this->server_error(_('User without matching profile in system.'));
            return;
        }

        $page = $this->arg('page');

        if (!$page) {
            $page = 1;
        }

        $display = $this->arg('display');

        if (!$display) {
            $display = 'list';
        }

        $tag = $this->arg('tag');

        common_show_header($profile->nickname . ": " . $this->gallery_type(),
                           null, $profile,
                           array($this, 'show_top'));

        $this->display_links($profile, $page, $display);
        $this->show_tags_dropdown($profile);

        $this->show_gallery($profile, $page, $display, $tag);
        common_show_footer();
    }

    function no_such_user()
    {
        $this->client_error(_('No such user.'));
    }

    function show_tags_dropdown($profile)
    {
        $tag = $this->trimmed('tag');

        list($lst, $usr) = $this->fields();

        $tags = $this->get_all_tags($profile, $lst, $usr);

        $content = array();

        foreach ($tags as $t) {
            $content[$t] = $t;
        }
        if ($tags) {
            common_element_start('dl', array('id'=>'filter_tags'));
            common_element('dt', null, _('Filter tags'));
            common_element_start('dd');
            common_element_start('ul');
            common_element_start('li', array('id' => 'filter_tags_all',
                                             'class' => 'child_1'));
            common_element('a',
                           array('href' =>
                                 common_local_url($this->trimmed('action'),
                                                  array('nickname' =>
                                                        $profile->nickname))),
                           _('All'));
            common_element_end('li');
            common_element_start('li', array('id'=>'filter_tags_item'));
            common_element_start('form', array('name' => 'bytag',
                                               'id' => 'bytag',
                                               'method' => 'post'));
            common_dropdown('tag', _('Tag'), $content,
                            _('Choose a tag to narrow list'), false, $tag);
            common_submit('go', _('Go'));
            common_element_end('form');
            common_element_end('li');
            common_element_end('ul');
            common_element_end('dd');
            common_element_end('dl');
        }
    }

    function show_top($profile)
    {
        common_element('div', 'instructions',
                       $this->get_instructions($profile));
        $this->show_menu();
    }

    function show_menu()
    {
        // action => array('prompt', 'title', $args)
        $action   = $this->trimmed('action');
        $nickname = $this->trimmed('nickname');

        $menu =
          array('subscriptions' =>
                array( _('Subscriptions'),
                       _('Subscriptions'),
                       array('nickname' => $nickname)),
                'subscribers' =>
                array(
                      _('Subscribers'),
                      _('Subscribers'),
                      array('nickname' => $nickname)),
                );
        $this->nav_menu($menu);
    }

    function show_gallery($profile, $page, $display='list', $tag=null)
    {
        $other = new Profile();

        list($lst, $usr) = $this->fields();

        $per_page = ($display == 'list') ? PROFILES_PER_PAGE : AVATARS_PER_PAGE;

        $offset = ($page-1)*$per_page;
        $limit = $per_page + 1;

        if (common_config('db', 'type') == 'pgsql') {
            $lim = ' LIMIT ' . $limit . ' OFFSET ' . $offset;
        } else {
            $lim = ' LIMIT ' . $offset . ', ' . $limit;
        }

        // XXX: memcached results
        // FIXME: SQL injection on $tag

        $other->query('SELECT profile.* ' .
                      'FROM profile JOIN subscription ' .
                      'ON profile.id = subscription.' . $lst . ' ' .
                      (($tag) ? 'JOIN profile_tag ON (profile.id = profile_tag.tagged AND subscription.'.$usr.'= profile_tag.tagger) ' : '') .
                      'WHERE ' . $usr . ' = ' . $profile->id . ' ' .
                      'AND subscriber != subscribed ' .
                      (($tag) ? 'AND profile_tag.tag= "' . $tag . '" ': '') .
                      'ORDER BY subscription.created DESC, profile.id DESC ' .
                      $lim);

        if ($display == 'list') {
            $cls = $this->profile_list_class();
            $profile_list = new $cls($other, $profile, $this->trimmed('action'));
            $cnt = $profile_list->show_list();
        } else {
            $cnt = $this->icon_list($other);
        }

        // For building the pagination URLs

        $args = array('nickname' => $profile->nickname);

        if ($display != 'list') {
            $args['display'] = $display;
        }

        common_pagination($page > 1,
                          $cnt > $per_page,
                          $page,
                          $this->trimmed('action'),
                          $args);
    }

    function profile_list_class()
    {
        return 'ProfileList';
    }

    function icon_list($other)
    {
        common_element_start('ul', $this->div_class());

        $cnt = 0;

        while ($other->fetch()) {

            $cnt++;

            if ($cnt > AVATARS_PER_PAGE) {
                break;
            }

            common_element_start('li');

            common_element_start('a', array('title' => ($other->fullname) ?
                                            $other->fullname :
                                            $other->nickname,
                                            'href' => $other->profileurl,
                                            'class' => 'subscription'));
            $avatar = $other->getAvatar(AVATAR_STREAM_SIZE);
            common_element('img',
                           array('src' =>
                                 (($avatar) ? common_avatar_display_url($avatar) :
                                  common_default_avatar(AVATAR_STREAM_SIZE)),
                                 'width' => AVATAR_STREAM_SIZE,
                                 'height' => AVATAR_STREAM_SIZE,
                                 'class' => 'avatar stream',
                                 'alt' => ($other->fullname) ?
                                 $other->fullname :
                                 $other->nickname));
            common_element_end('a');

            // XXX: subscribe form here

            common_element_end('li');
        }

        common_element_end('ul');

        return $cnt;
    }

    function gallery_type()
    {
        return null;
    }

    function get_instructions(&$profile)
    {
        return null;
    }

    function fields()
    {
        return null;
    }

    function div_class()
    {
        return '';
    }

    function display_links($profile, $page, $display)
    {
        $tag = $this->trimmed('tag');

        common_element_start('dl', array('id'=>'subscriptions_nav'));
        common_element('dt', null, _('Subscriptions navigation'));
        common_element_start('dd');
        common_element_start('ul', array('class'=>'nav'));

        switch ($display) {
         case 'list':
            common_element('li', array('class'=>'child_1'), _('List'));
            common_element_start('li');
            $url_args = array('display' => 'icons',
                              'nickname' => $profile->nickname,
                              'page' => 1 + floor((($page - 1) * PROFILES_PER_PAGE) / AVATARS_PER_PAGE));
            if ($tag) {
                $url_args['tag'] = $tag;
            }
            $url = common_local_url($this->trimmed('action'), $url_args);
            common_element('a', array('href' => $url),
                           _('Icons'));
            common_element_end('li');
            break;
         default:
            common_element_start('li', array('class'=>'child_1'));
            $url_args = array('nickname' => $profile->nickname,
                              'page' => 1 + floor((($page - 1) * AVATARS_PER_PAGE) / PROFILES_PER_PAGE));
            if ($tag) {
                $url_args['tag'] = $tag;
            }
            $url = common_local_url($this->trimmed('action'), $url_args);
            common_element('a', array('href' => $url),
                           _('List'));
            common_element_end('li');
            common_element('li', null, _('Icons'));
            break;
        }

        common_element_end('ul');
        common_element_end('dd');
        common_element_end('dl');
    }

    // Get list of tags we tagged other users with

    function get_all_tags($profile, $lst, $usr)
    {
        $profile_tag = new Notice_tag();
        $profile_tag->query('SELECT DISTINCT(tag) ' .
                            'FROM profile_tag, subscription ' .
                            'WHERE tagger = ' . $profile->id . ' ' .
                            'AND ' . $usr . ' = ' . $profile->id . ' ' .
                            'AND ' . $lst . ' = tagged ' .
                            'AND tagger != tagged');
        $tags = array();
        while ($profile_tag->fetch()) {
            $tags[] = $profile_tag->tag;
        }
        $profile_tag->free();
        return $tags;
    }
}