package diary_test

import (
	"context"
	"log/slog"
	"os"

	"git.golem15.com/golem15/summercms/modules/diary"
)

// blogLog is the component logger of a blog plugin, created once in a
// package var block, before diary is set up.
var blogLog = diary.For("blog")

func ExampleFor() {
	// Before diary.Setup runs, records go to the process default logger.
	// This one drops the time so the output is stable.
	previous := slog.Default()
	defer slog.SetDefault(previous)
	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
			if len(groups) == 0 && a.Key == slog.TimeKey {
				return slog.Attr{}
			}
			return a
		},
	})))

	// After diary.Setup the same record reaches the configured channels and
	// passes log.components.blog, else log.level.
	blogLog.InfoContext(context.Background(), "post published", "id", 7)
	// Output:
	// level=INFO msg="post published" component=blog id=7
}