netdata/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

package logger

import (
    "log/slog"
    "strings"
)

const (
    levelNotice  = slog.Level(2)
    levelDisable = slog.Level(99)
)

var (
    customLevels = map[slog.Leveler]string{
        levelNotice: "NOTICE",
    }
    customLevelsTerm = map[slog.Leveler]string{
        levelNotice: "\u001B[34m" + "NTC" + "\u001B[0m",
    }
)

var Level = &level{lvl: &slog.LevelVar{}}

type level struct {
    lvl *slog.LevelVar
}

func (l *level) Enabled(level slog.Level) bool {
    return level >= l.lvl.Level()
}

func (l *level) Set(level slog.Level) {
    l.lvl.Set(level)
}

func (l *level) SetByName(level string) {
    // https://github.com/netdata/netdata/tree/master/src/libnetdata/log#log-levels
    switch strings.ToLower(level) {
    case "err", "error":
        l.lvl.Set(slog.LevelError)
    case "warn", "warning":
        l.lvl.Set(slog.LevelWarn)
    case "notice":
        l.lvl.Set(levelNotice)
    case "info":
        l.lvl.Set(slog.LevelInfo)
    case "debug":
        l.lvl.Set(slog.LevelDebug)
    case "emergency", "alert", "critical":
        l.lvl.Set(levelDisable)
    }
}