<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

function wikiplugin_zoterolist_info()
{
    return [
        'name' => tra('Zotero Reference List'),
        'description' => tra('Display the complete reference list from a Zotero server'),
        'prefs' => ['zotero_enabled', 'wikiplugin_zoterolist'],
        'iconname' => 'bookmark',
        'introduced' => 7,
        'params' => [
            'tag' => [
                'name' => tra('Tag'),
                'description' => tra('Provide the list of references with a given tag.'),
                'since' => '7.0',
                'required' => true,
                'filter' => 'alnum',
            ],
        ],
    ];
}

function wikiplugin_zoterolist($data, $params)
{
    if (! isset($params['tag'])) {
        return WikiParser_PluginOutput::argumentError(['tag']);
    }

    $cachelib = TikiLib::lib('cache');
    $tikilib = TikiLib::lib('tiki');

    $cacheKey = 'zoterolist.' . $params['tag'];

    if ($cached = $cachelib->getSerialized($cacheKey, 'zotero')) {
        if (($cached['created'] + 3600) > $tikilib->now) {
            return WikiParser_PluginOutput::html($cached['data']);
        }
    }

    $zoterolib = TikiLib::lib('zotero');
    $html = $zoterolib->get_formatted_references($params['tag']);

    $cachelib->cacheItem($cacheKey, serialize(['created' => $tikilib->now, 'data' => $html]), 'zotero');

    if ($html) {
        return WikiParser_PluginOutput::html($html);
    } else {
        return WikiParser_PluginOutput::error(tra('Error'), tra('No results obtained. The Zotero citation server may be down.'));
    }
}