<?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.
// $Id$

/**
 * @return array
 */
function module_search_morelikethis_info()
{
    return [
        'name' => tra('More Like This'),
        'description' => tra('Uses the unified search to provide similar documents.'),
        'prefs' => ['feature_search'],
        'params' => [
            'typefilters' => [
                'required' => false,
                'name' => tra('Object Type Filters'),
                'description' => tra('Comma-separated types to allow.'),
                'filter' => 'text',
            ],
            'textfilters' => [
                'required' => false,
                'name' => tra('Text Search Filters'),
                'description' => tra('Comma-separated text search filters to use. Use "=" to separate field and value.'),
                'filter' => 'text',
            ],
            'object' => [
                'required' => false,
                'name' => tra('Object id of item you want to get similar items to'),
                'description' => tra('The object id of the item. If none is provided, Tiki will attempt to resolve the current object.'),
                'filter' => 'text',
                'since' => '16'
            ],
            'type' => [
                'required' => false,
                'name' => tra('Object type of item you want to get similar items to'),
                'description' => tra('The object type of the item (eg. "trackeritem"). If none is provided, Tiki will attempt to resolve the current object.'),
                'filter' => 'text',
                'since' => '16'
            ],
        ],
        'common_params' => ['nonums', 'rows']
    ];
}

/**
 * @param $mod_reference
 * @param $module_params
 */
function module_search_morelikethis($mod_reference, $module_params)
{
    global $prefs;

    $smarty = TikiLib::lib('smarty');

    $textfilters = [];
    $typefilters = [];
    if (! empty($module_params['textfilters'])) {
        $filters = explode(",", $module_params['textfilters']);
        $filters = array_map('trim', $filters);
        foreach ($filters as $f) {
            $exploded = explode("=", $f);
            if (! empty($exploded[1]) && ! empty($exploded[0])) {
                $textfilters[$exploded[0]] = $exploded[1];
            }
        }
    }
    if (! empty($module_params['typefilters'])) {
        $typefilters = explode(",", $module_params['typefilters']);
        $typefilters = array_map('trim', $typefilters);
    }

    $object = [];
    if (isset($module_params['object']) && isset($module_params['type'])) {
        $object['object'] = $module_params['object'];
        $object['type'] = $module_params['type'];
    } else {
        $object = current_object();
    }

    if (! empty($object)) {
        $unifiedsearchlib = TikiLib::lib('unifiedsearch');

        $query = $unifiedsearchlib->buildQuery([]);
        $query->filterSimilar($object['type'], $object['object']);
        $smarty->assign('simobject', $object);
        $query->setRange(0, $mod_reference['rows']);
        foreach ($textfilters as $k => $v) {
            $query->filterContent($v, $k);
        }
        if (! empty($typefilters)) {
            $query->filterType($typefilters);
        }

        if ($prefs['federated_enabled'] == 'y') {
            $fed = TikiLib::lib('federatedsearch');
            $fed->augmentSimilarQuery($query, $object['type'], $object['object']);
        }

        try {
            $morelikethis = $query->search($unifiedsearchlib->getIndex());

            $smarty->assign('modMoreLikeThis', $morelikethis);
            $smarty->assign('module_rows', $mod_reference["rows"]);
        } catch (Search_Elastic_NotFoundException $e) {
            // Target document not found - excluded from index, ignore module
        }
    }

    $smarty->assign('tpl_module_title', tra("Similar pages"));
}