<?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.
// $Id$

class FlaggedRevisionLib extends TikiDb_Bridge
{
    const ACTION = 'Flagged';

    public function flag_revision($pageName, $version, $flag, $value, $comment = '')
    {
        global $prefs;
        $attributelib = TikiLib::lib('attribute');
        $histlib = TikiLib::lib('hist');

        if ($version_info = $histlib->get_version($pageName, $version)) {
            $tx = TikiDb::get()->begin();

            if ($prefs['feature_actionlog'] == 'y') {
                $logslib = TikiLib::lib('logs');
                $logslib->add_action(self::ACTION, $pageName, 'wiki page', "flag=$flag&version=$version&value=$value");
            }

            $attribute = $this->get_attribute_for_flag($flag);
            $attributelib->set_attribute('wiki history', $version_info['historyId'], $attribute, $value, $comment);

            require_once('lib/search/refresh-functions.php');
            refresh_index('pages', $pageName);
            refresh_index('pages', "$pageName~~latest");
            $tx->commit();

            return true;
        } else {
            return false;
        }
    }

    public function get_version_with($pageName, $flag, $value)
    {
        $this->get_version_query($pageName, $flag, $value, $query, $bindvars);

        $result = $this->fetchAll($query, $bindvars, 1);

        $first = reset($result);
        return $first;
    }

    public function get_versions_with($pageName, $flag, $value)
    {
        $this->get_version_query($pageName, $flag, $value, $query, $bindvars, 'version');
        $result = $this->fetchAll($query, $bindvars);

        $versions = [];
        foreach ($result as $row) {
            $versions[] = $row['version'];
        }

        return $versions;
    }

    public function get_flag_comment($pageName, $version, $flag, $value)
    {
        $query = 'SELECT toa.`comment` FROM `tiki_history` th INNER JOIN `tiki_object_attributes` toa ON toa.`itemId` = `historyId` AND toa.`type` = ? WHERE toa.`attribute` = ? AND toa.`value` = ? AND th.`pageName` = ? AND th.`version`=?';
        $bindvars = [
            'wiki history',
            $this->get_attribute_for_flag($flag),
            $value,
            $pageName,
            $version,
        ];

        $result = $this->fetchAll($query, $bindvars, 1);
        $first = reset($result);
        return $first['comment'];
    }

    private function get_version_query($pageName, $flag, $value, &$query, &$bindvars, $fields = 'th.*')
    {
        // NOTE : These are out variables
        $query = 'SELECT ' . $fields . ' FROM `tiki_history` th INNER JOIN `tiki_object_attributes` toa ON toa.`itemId` = `historyId` AND toa.`type` = ? WHERE toa.attribute = ? AND toa.value = ? AND th.pageName = ? ORDER BY `th`.`version` DESC';

        $bindvars = [
            'wiki history',
            $this->get_attribute_for_flag($flag),
            $value,
            $pageName,
        ];
    }

    public function version_is_flagged($pageName, $version, $flag, $value)
    {
        $query = 'SELECT th.historyId FROM `tiki_history` th INNER JOIN `tiki_object_attributes` toa ON toa.`itemId` = `historyId` AND toa.`type` = ? WHERE toa.`attribute` = ? AND toa.`value` = ? AND th.`pageName` = ? AND th.`version` = ? ORDER BY `th`.`version` DESC';

        $bindvars = [
            'wiki history',
            $this->get_attribute_for_flag($flag),
            $value,
            $pageName,
            $version,
        ];

        $result = $this->fetchAll($query, $bindvars);

        return (bool)$result;
    }

    public function page_requires_approval($pageName)
    {
        global $prefs, $tikilib;

        if ($prefs['flaggedrev_approval'] != 'y') {
            return false;
        }

        if ($prefs['feature_categories'] == 'y') {
            $categlib = TikiLib::lib('categ');
            $approvalCategories = $tikilib->get_preference('flaggedrev_approval_categories', [], true);

            $objectCategories = $categlib->get_object_categories('wiki page', $pageName);

            return count(array_intersect($approvalCategories, $objectCategories)) > 0;
        }

        return false;
    }

    public function find_approval_information($page, $version)
    {
        global $prefs;

        if ($prefs['feature_actionlog'] == 'y') {
            $logs = $this->table('tiki_actionlog');
            return $logs->fetchRow(
                ['user', 'lastModif', 'ip'],
                [
                    'action' => self::ACTION,
                    'object' => $page,
                    'objectType' => 'wiki page',
                    'comment' => "flag=moderation&version=$version&value=OK",
                ]
            );
        }
    }

    private function get_attribute_for_flag($flag)
    {
        return 'tiki.history.' . $flag;
    }
}