<?php

// must be run within Dokuwiki

if(!defined('DOKU_INC')) die();

class action_plugin_ireadit_auth extends DokuWiki_Action_Plugin {

    /**
     * Registers a callback function for a given event
     *
     * @param Doku_Event_Handler $controller DokuWiki's event controller object
     * @return void
     */
    public function register(Doku_Event_Handler $controller) {
        $controller->register_hook('AUTH_USER_CHANGE', 'AFTER', $this, 'handle_auth_user_change');
    }

    /**
     * @param $user
     */
    protected function updateUserIreadits($user) {

        /** @var helper_plugin_ireadit_db $db_helper */
        $db_helper = plugin_load('helper', 'ireadit_db');
        $sqlite = $db_helper->getDB();

        /** @var helper_plugin_ireadit $helper */
        $helper = plugin_load('helper', 'ireadit');

        $res = $sqlite->query('SELECT page,meta FROM meta');
        $rows = $sqlite->res2arr($res);
        foreach ($rows as $row) {
            $page = $row['page'];
            $meta = json_decode($row['meta'], true);
            if ($helper->in_users_set($user, $meta)) {
                $last_change_date = p_get_metadata($page, 'last_change date');
                $sqlite->storeEntry('ireadit', [
                    'page' => $page,
                    'rev' => $last_change_date,
                    'user' => $user
                ]);
            }
        }
    }

    public function handle_auth_user_change(Doku_Event $event) {
        $type = $event->data['type'];

        /** @var helper_plugin_ireadit_db $db_helper */
        $db_helper = plugin_load('helper', 'ireadit_db');
        $sqlite = $db_helper->getDB();

        switch ($type) {
            case 'create':
                $user = $event->data['params'][0];
                $this->updateUserIreadits($user);
                break;
            case 'modify':
                //update username
                $user =  $event->data['params'][0];
                if (isset($event->data['params'][1]['user'])) {
                    $old_username = $user;
                    $new_username =  $event->data['params'][1]['user'];
                    if ($old_username != $new_username) {
                        $sqlite->query('UPDATE ireadit SET user=? WHERE user=?', $new_username, $old_username);
                        $user = $new_username;
                    }
                }
                //update groups
                if (isset($event->data['params'][1]['grps'])) {
                    $sqlite->query('DELETE FROM ireadit WHERE user=? AND timestamp IS NULL', $user);
                    $this->updateUserIreadits($user);
                }

                break;
            case 'delete':
                $user = $event->data['params'][0][0];

                $sqlite->query('DELETE FROM ireadit WHERE user=? AND timestamp IS NULL', $user);
                break;
        }

    }

}