<?php
    global $c;

    $strDBCSFile    = "dbcs.txt";
    $strDBCS        = "sqlite:sqlite.db";

    if (!file_exists($strDBCSFile))
        file_put_contents($strDBCSFile, $strDBCS);

    $strDBCS = trim(file_get_contents($strDBCSFile));

    $c = new DatabaseConnection($strDBCS);

    $intInitialize = 1;
    if ($intInitialize == 1)
    {
        $c->query([
            "create_users_table.sql",
            "create_sessions_table.sql",
            "create_links_table.sql",
            "create_posts_table.sql",
            "create_settings_table.sql"]);

        $varLinks = $c->query("SELECT * from links");

        if (count($varLinks) < 1)
        {
            $c->query(
                "INSERT into links (label, url, icon, position, visibility)
                values
                    ('Home', '/',       'home', 'navbar', ''),
                    ('Post', '/post',   'edit', 'navbar', 'user'),

                    ('Home',        '/',                'home', 'sidebar', ''),
                    ('Edit Links',  '/edit/links',      'link', 'sidebar', 'admin'),
                    ('Edit CSS',    '/settings/css',    'code', 'sidebar', 'admin'),
                    ('Edit JS',     '/settings/js',     'code', 'sidebar', 'admin'),

                    ('Copyright © 2025',    '/',        'building', 'footer', '')"
                );
        }

    }

    class Settings
    {
        public static function get($strSettingName, $strDefault="", $intSave=0)
        {
            global $c;

            $varExisting = $c->query("
                SELECT *
                from settings
                where
                    setting like ?
                order by
                    id desc",
                $strSettingName);

            if (count($varExisting) > 0)
                return $varExisting[0]["value"];

             if ($intSave)
                Settings::set($strSettingName, $strDefault);

            return $strDefault;
        }

        public static function set($strSettingName, $strValue)
        {
            global $c;

            $varExisting = $c->query("
                SELECT *
                from settings
                where
                    setting like ?
                order by
                    id desc",
                $strSettingName);

            if (count($varExisting) !== 1)
            {
                $c->query("DELETE from settings where setting like ?", $strSettingName);
                $c->query("INSERT into settings (setting, value) values (?, ?)", $strSettingName, $strValue);
            }

            $c->query(
                "UPDATE settings
                set
                    value = ?
                where setting like ?",
                $strValue,
                $strSettingName);
        }
    }


    class UserAuth
    {
        public static function getUser()
        {
            global $c;
            try
            {
                $strToken = Cookie::get("token");

                if ($strToken !== null)
                    if (strlen($strToken) > 0)
                    {
                        $varSessions = $c->query(
                            "SELECT *
                            from sessions as s
                            join users as u on u.username = s.username
                            where
                                s.token = ?
                            and (
                                    s.expires is null
                                or  s.expires > current_timestamp
                            )",
                            $strToken);

                        if (count($varSessions) == 1)
                            return $varSessions[0];
                    }
            }
            catch (Exception $x) {}
            return null;
        }

        public static function has($strColumnName)
        {
            global $c;
            $varUser = UserAuth::getUser();

            if ($varUser == null)
                return false;

            if (array_key_exists($strColumnName, $varUser))
                if (intval($varUser[$strColumnName]) > 0)
                    return true;

            return false;
        }

        public static function require($strColumnName)
        {
            if (!UserAuth::has($strColumnName))
            {
                BootstrapRender::message("You do not have permission to do that, please sign into an account that does.", "warning");
                Respond::redirect("/user/signin");
            }
        }

        public static function visible($strVisibility)
        {
            global $c;

            if (UserAuth::has("is_admin"))
                return true;

            $varUser        = UserAuth::getUser();
            $strUsername    = $varUser["username"] ?? null;
            $varRegex       = [
                ["/user/i",     ($varUser == null)],
                ["/admin/i",    (!UserAuth::has("is_admin"))],
            ];

            // Support arrays with username and visibility keys:
            if (is_array($strVisibility))
            {
                if (array_key_exists("username", $strVisibility))
                    if ($strVisibility["username"] == $strUsername)
                        return true;

                if (!array_key_exists("visibility", $strVisibility))
                    return false;

                $strVisibility = $strVisibility["visibility"];
            }

            if (preg_match("/{$strUsername}/i", $strVisibility))    return true;
            if (preg_match("/(every|any|all)/i", $strVisibility))   return true; 

            $intExit = 0;

            foreach ($varRegex as $re)
                if (preg_match($re[0], $strVisibility))
                    if ($re[1])
                        $intExit = 1;

            if ($intExit == 1)
                return false;
            return true;
        }
    }
?>