sneak
144a2df665
Full project structure following upaas conventions: uber/fx DI, go-chi routing, slog logging, Viper config. State persisted as JSON file with per-nameserver record tracking for inconsistency detection. Stub implementations for resolver, portcheck, tlscheck, and watcher.
84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
// Package logger provides structured logging with slog.
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package logger
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import (
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"log/slog"
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"os"
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"go.uber.org/fx"
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"sneak.berlin/go/dnswatcher/internal/globals"
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)
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// Params contains dependencies for Logger.
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type Params struct {
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fx.In
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Globals *globals.Globals
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}
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// Logger wraps slog.Logger with level control.
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type Logger struct {
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log *slog.Logger
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level *slog.LevelVar
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params Params
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}
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// New creates a new Logger with TTY detection for output format.
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func New(_ fx.Lifecycle, params Params) (*Logger, error) {
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loggerInstance := &Logger{
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level: new(slog.LevelVar),
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params: params,
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}
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loggerInstance.level.Set(slog.LevelInfo)
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isTTY := detectTTY()
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var handler slog.Handler
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if isTTY {
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handler = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
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Level: loggerInstance.level,
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AddSource: true,
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})
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} else {
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handler = slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
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Level: loggerInstance.level,
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AddSource: true,
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})
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}
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loggerInstance.log = slog.New(handler)
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return loggerInstance, nil
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}
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func detectTTY() bool {
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fileInfo, err := os.Stdout.Stat()
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if err != nil {
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return false
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}
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return (fileInfo.Mode() & os.ModeCharDevice) != 0
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}
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// Get returns the underlying slog.Logger.
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func (l *Logger) Get() *slog.Logger {
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return l.log
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}
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// EnableDebugLogging sets the log level to debug.
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func (l *Logger) EnableDebugLogging() {
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l.level.Set(slog.LevelDebug)
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l.log.Debug("debug logging enabled", "debug", true)
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}
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// Identify logs application startup information.
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func (l *Logger) Identify() {
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l.log.Info("starting",
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"appname", l.params.Globals.Appname,
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"version", l.params.Globals.Version,
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"buildarch", l.params.Globals.Buildarch,
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)
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}
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