<?php
    class Settings
    {
        private static $varValues = null;

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

            if (Settings::$varValues == null)
            {
                $varRows    = $c->query("SELECT * from settings order by setting");
                $varValues  = [];

                foreach ($varRows as $r)
                    $varValues[$r["setting"]] = $r["value"];

                Settings::$varValues = $varValues;
            }

            if ($strSettingName == null)
                return Settings::$varValues;

            if (array_key_exists($strSettingName, Settings::$varValues))
                $strOutput = Settings::$varValues[$strSettingName];
            else
            {
                if ($intSave)
                    Settings::set($strSettingName, $strDefault);
            }

            return trim($strOutput);
        }

        public static function set($strSettingName, $strValue)
        {
            Settings::$varValues = null;
            global $c;

            $strValue = trim($strValue);
            $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);
        }

        public static function makeReplacements($strText)
        {
            // Handle nested setting value injection:
            preg_match_all("/\{\{([A-Za-z0-9_]{1,})\}\}/i", $strText, $varMatches);

            if (count($varMatches[1]) > 0)
                foreach ($varMatches[1] as $varMatch)
                {
                    $strKey     = $varMatch;
                    $strValue   = Settings::get($strKey);
                    $strText    = preg_replace("/\{\{$strKey\}\}/i", $strValue, $strText);
                }

            return $strText;
        }
    }
?>