<?php

/**
 * file: logger.php
 * date: 01.03.2021
 * author: bernd@nr18.space
 * desc: Simpler Logger
 */


class Logger {

    /**
     * Einfache Klasse zum Loggen von Nachrichten. Schreibt seine
     * Nachrichten in eine Datei. Eleganter wäre ein Weiterreichen an den
     * Logging-Daemon des Betriebssystems.
     * TODO: Er ist wenig Fehlertolerant. Es wird nicht geprüft, ob der
     * angefragte Key im Array existiert.
     */

    private $levelnumbers = array(
                "ERROR" => 10,
                "WARN"  => 20,
                "INFO"  => 30,
                "DEBUG" => 40,
    );
    public $loglevel = "INFO";
    private $logfile = "log/register.log";
    private $app = "matrix-register";

    public function e(string $msg) {
        $this->logMsg("ERROR", $msg);
    }

    public function w(string $msg) {
        $this->logMsg("WARN", $msg);
    }

    public function i(string $msg) {
        $this->logMsg("INFO", $msg);
    }

    public function d(string $msg) {
        $this->logMsg("DEBUG", $msg);
    }

    public function setLogLevel(string $level) {
        if (array_key_exists($level, $this->levelnumbers) === true) {
            $this->loglevel = $level;
            $this->writeLog("INFO", "Loglevel set to {$level}");
        } else {
            $this->writeLog("WARN", "{$level} is not a valid loglevel.");
        }
    }

    private function logMsg(string $label, string $msg) {
        $msglevel = $this->levelnumbers[$label];
        $loglevel = $this->levelnumbers[$this->loglevel];
        if ($loglevel >= $msglevel) {
            $this->writeLog($label, $msg);
        }
    }

    private function writeLog(string $label, string $msg) {
        $app = $this->app;
        $file = $this->logfile;
        error_log(date("[Y-m-d H:i:s]")." [".$label."] [".$app."] ".$msg."\n", 3, $file);
    }

}


?>