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84 lines
2.7 KiB
Go
84 lines
2.7 KiB
Go
// Copyright (c) 2021 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Package waLog contains a simple logger interface used by the other whatsmeow packages.
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package waLog
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import (
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"fmt"
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"strings"
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"time"
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)
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// Logger is a simple logger interface that can have subloggers for specific areas.
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type Logger interface {
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Warnf(msg string, args ...interface{})
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Errorf(msg string, args ...interface{})
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Infof(msg string, args ...interface{})
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Debugf(msg string, args ...interface{})
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Sub(module string) Logger
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}
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type noopLogger struct{}
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func (n *noopLogger) Errorf(_ string, _ ...interface{}) {}
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func (n *noopLogger) Warnf(_ string, _ ...interface{}) {}
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func (n *noopLogger) Infof(_ string, _ ...interface{}) {}
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func (n *noopLogger) Debugf(_ string, _ ...interface{}) {}
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func (n *noopLogger) Sub(_ string) Logger { return n }
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// Noop is a no-op Logger implementation that silently drops everything.
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var Noop Logger = &noopLogger{}
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type stdoutLogger struct {
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mod string
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color bool
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min int
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}
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var colors = map[string]string{
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"INFO": "\033[36m",
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"WARN": "\033[33m",
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"ERROR": "\033[31m",
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}
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var levelToInt = map[string]int{
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"": -1,
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"DEBUG": 0,
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"INFO": 1,
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"WARN": 2,
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"ERROR": 3,
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}
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func (s *stdoutLogger) outputf(level, msg string, args ...interface{}) {
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if levelToInt[level] < s.min {
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return
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}
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var colorStart, colorReset string
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if s.color {
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colorStart = colors[level]
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colorReset = "\033[0m"
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}
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fmt.Printf("%s%s [%s %s] %s%s\n", time.Now().Format("15:04:05.000"), colorStart, s.mod, level, fmt.Sprintf(msg, args...), colorReset)
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}
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func (s *stdoutLogger) Errorf(msg string, args ...interface{}) { s.outputf("ERROR", msg, args...) }
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func (s *stdoutLogger) Warnf(msg string, args ...interface{}) { s.outputf("WARN", msg, args...) }
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func (s *stdoutLogger) Infof(msg string, args ...interface{}) { s.outputf("INFO", msg, args...) }
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func (s *stdoutLogger) Debugf(msg string, args ...interface{}) { s.outputf("DEBUG", msg, args...) }
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func (s *stdoutLogger) Sub(mod string) Logger {
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return &stdoutLogger{mod: fmt.Sprintf("%s/%s", s.mod, mod), color: s.color, min: s.min}
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}
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// Stdout is a simple Logger implementation that outputs to stdout. The module name given is included in log lines.
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//
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// minLevel specifies the minimum log level to output. An empty string will output all logs.
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//
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// If color is true, then info, warn and error logs will be colored cyan, yellow and red respectively using ANSI color escape codes.
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func Stdout(module string, minLevel string, color bool) Logger {
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return &stdoutLogger{mod: module, color: color, min: levelToInt[strings.ToUpper(minLevel)]}
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}
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